% Copyright 2018-2024 by Romano Giannetti
% Copyright 2015-2024 by Stefan Lindner
% Copyright 2013-2024 by Stefan Erhardt
% Copyright 2007-2024 by Massimo Redaelli
%
% This file may be distributed and/or modified
%
% 1. under the LaTeX Project Public License and/or
% 2. under the GNU Public License.
%
% See the files gpl-3.0_license.txt and lppl-1-3c_license.txt for more details.

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% Quadripoles
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%


% Setting for Transformers and similar quadpoles%<<<1

\ctikzset{quadpoles/transformer/inner/.initial=0.4}
\ctikzset{quadpoles/transformer/width/.initial=1.5}
\ctikzset{quadpoles/transformer/width1/.initial=.4}
\ctikzset{quadpoles/transformer/height/.initial=1.5}
\ctikzset{quadpoles/transformer/height1/.initial=.8}
\ctikzset{quadpoles/transformer core/inner/.initial=0.4}
\ctikzset{quadpoles/transformer core/width/.initial=1.5}
\ctikzset{quadpoles/transformer core/height/.initial=1.5}
\ctikzset{quadpoles/transformer core/core height/.initial=.5}
\ctikzset{quadpoles/transformer core/core width/.initial=.05}
\ctikzset{transformer core/relative thickness/.initial=1}
\ctikzset{transformer core/color/.initial=default}
\ctikzset{transformer core/dash/.initial=default}
\ctikzset{quadpoles/gyrator/inner/.initial=0.4}
\ctikzset{quadpoles/gyrator/width/.initial=1.5}
\ctikzset{quadpoles/gyrator/height/.initial=1.5}
\ctikzset{quadpoles/fourport/width/.initial=1.3}
\ctikzset{quadpoles/fourport/height/.initial=1.3}
\ctikzset{quadpoles/coupler/width/.initial=1.3}
\ctikzset{quadpoles/coupler/height/.initial=1.3}
\ctikzset{quadpoles/coupler2/width/.initial=1.3}
\ctikzset{quadpoles/coupler2/height/.initial=1.3}
\ctikzset{quadpoles/double bipole/inner/.initial=0.4}
\ctikzset{quadpoles/double bipole/width/.initial=1.5}
\ctikzset{quadpoles/double bipole/width1/.initial=.4}
\ctikzset{quadpoles/double bipole/height/.initial=1.5}
\ctikzset{quadpoles/double bipole/height1/.initial=.8}

\ctikzset{quadpoles style/.is choice}
\ctikzset{quadpoles style/inward/.code={% default value
        \ctikzset{quadpoles/transformer/inner=0.4}%
        \ctikzset{quadpoles/transformer/width=1.5}%
        \ctikzset{quadpoles/transformer core/inner=0.4}%
        \ctikzset{quadpoles/transformer core/width=1.5}%
        \ctikzset{quadpoles/gyrator/inner=0.4}%
        \ctikzset{quadpoles/gyrator/width=1.5}%
        \ctikzset{quadpoles/double bipole/inner=0.4}%
        \ctikzset{quadpoles/double bipole/width=1.5}%
    }%
}
\ctikzset{quadpoles style/inline/.code={% now horizontal baffle
        \ctikzset{quadpoles/transformer/inner=1}%
        \ctikzset{quadpoles/transformer/width=0.6}%
        \ctikzset{quadpoles/transformer core/inner=1}%
        \ctikzset{quadpoles/transformer core/width=0.6}%
        \ctikzset{quadpoles/gyrator/inner=1} % FIXME
        \ctikzset{quadpoles/gyrator/width=0.6}%
        \ctikzset{quadpoles/double bipole/inner=1}%
        \ctikzset{quadpoles/double bipole/width=0.6}%
    }%
}
%%>>>

%% Node shapes for quadpoles (basically transformers)%<<<

\long\def\pgfcircdeclarequadpole#1#2#3{
    \pgfdeclareshape{#1}
    {
        \savedmacro{\ctikzclass}{\edef\ctikzclass{inductors}}
        \saveddimen{\scaledRlen}{\pgfmathsetlength{\pgf@x}{\ctikzvalof{\ctikzclass/scale}\pgf@circ@Rlen}}
        % shapename
        \savedmacro{\thisshape}{\def\thisshape{\tikz@fig@name}}
        \savedmacro{\stretto}{\def\stretto{\ctikzvalof{quadpoles/#1/inner}}}
        \savedanchor\northwest{%
            \pgfmathsetlength{\pgf@circ@scaled@Rlen}{\ctikzvalof{\ctikzclass/scale}\pgf@circ@Rlen}
            \pgf@y=\ctikzvalof{quadpoles/#1/height}\pgf@circ@scaled@Rlen
            \pgf@y=.5\pgf@y
            \pgf@x=.5\pgf@circ@scaled@Rlen
            \pgf@x=-\ctikzvalof{quadpoles/#1/width}\pgf@x
        }
        %% we define the upper right (positive coord) inner and outer dots (on the side of B1)
        \savedanchor{\innerdot}{%
            \pgfmathsetlength{\pgf@circ@scaled@Rlen}{\ctikzvalof{\ctikzclass/scale}\pgf@circ@Rlen}
            \pgf@xa=.5\pgf@circ@scaled@Rlen
            \pgf@xa=-\ctikzvalof{quadpoles/#1/width}\pgf@xa
            % by default use the cute inductor size
            \pgfmathsetlength\pgf@x{-\stretto*\pgf@xa-\ctikzvalof{bipoles/cuteinductor/height}*\pgf@circ@scaled@Rlen/2}
            % check if it's american
            \edef\pgf@circ@temp{\ctikzvalof{inductor}}
            \edef\pgf@temp{american}
            \ifx\pgf@circ@temp\pgf@temp
                \pgfmathsetlength\pgf@x{-\stretto*\pgf@xa-\ctikzvalof{bipoles/americaninductor/height}*\pgf@circ@scaled@Rlen/2}
            \fi
            % check if it's european
            \edef\pgf@temp{european}
            \ifx\pgf@circ@temp\pgf@temp
                \pgfmathsetlength\pgf@x{-\stretto*\pgf@xa-\ctikzvalof{bipoles/fullgeneric/height}*\pgf@circ@scaled@Rlen/2}
            \fi
            \pgfmathsetlength\pgf@y{0.5*\pgf@circ@scaled@Rlen}
        }
        \savedanchor{\outerdot}{%
            \pgfmathsetlength{\pgf@circ@scaled@Rlen}{\ctikzvalof{\ctikzclass/scale}\pgf@circ@Rlen}
            \pgf@xa=.5\pgf@circ@scaled@Rlen
            \pgf@xa=-\ctikzvalof{quadpoles/#1/width}\pgf@xa
            % by default use the cute inductor size
            \pgfmathsetlength\pgf@x{-\stretto*\pgf@xa+\ctikzvalof{bipoles/cuteinductor/height}*\pgf@circ@scaled@Rlen/2}
            % check if it's american
            \edef\pgf@circ@temp{\ctikzvalof{inductor}}
            \edef\pgf@temp{american}
            \ifx\pgf@circ@temp\pgf@temp
                \pgfmathsetlength\pgf@x{-\stretto*\pgf@xa+\ctikzvalof{bipoles/americaninductor/height}*\pgf@circ@scaled@Rlen/2}
            \fi
            % check if it's european
            \edef\pgf@temp{european}
            \ifx\pgf@circ@temp\pgf@temp
                \pgfmathsetlength\pgf@x{-\stretto*\pgf@xa+\ctikzvalof{bipoles/fullgeneric/height}*\pgf@circ@scaled@Rlen/2}
            \fi
            \pgfmathsetlength\pgf@y{0.5*\pgf@circ@scaled@Rlen}
        }
        % geographical
        \anchor{center}{\northwest\pgf@x=0pt\pgf@y=0pt}
        \pgfcirc@northwest@symmetric@geoanchors
        \anchor{base}{\northwest\pgf@x=0pt}
        % external wires
        \anchor{A2}{\northwest\pgf@y=-\pgf@y}
        \anchor{B1}{\northwest\pgf@x=-\pgf@x}
        \anchor{A1}{\northwest}
        \anchor{B2}{\northwest\pgf@x=-\pgf@x \pgf@y=-\pgf@y}
        %% dot's anchors
        \anchor{inner dot A1}{\innerdot\pgf@x=-\pgf@x}
        \anchor{outer dot A1}{\outerdot\pgf@x=-\pgf@x}
        \anchor{inner dot A2}{\innerdot\pgf@x=-\pgf@x\pgf@y=-\pgf@y}
        \anchor{outer dot A2}{\outerdot\pgf@x=-\pgf@x\pgf@y=-\pgf@y}
        \anchor{inner dot B1}{\innerdot}
        \anchor{outer dot B1}{\outerdot}
        \anchor{inner dot B2}{\innerdot\pgf@y=-\pgf@y}
        \anchor{outer dot B2}{\outerdot\pgf@y=-\pgf@y}
        % text above
        \anchor{text}{
            \northwest
            \pgf@x=\dimexpr -.5\wd\pgfnodeparttextbox\relax
            \advance\pgf@y by .6\ht\pgfnodeparttextbox\relax
        }
        #3%
        \pgf@circ@draw@component{
            \pgf@circ@setcolor

            \northwest
            \pgf@circ@res@up = \pgf@y
            \pgf@circ@res@down = -\pgf@y
            \pgf@circ@res@right = -\pgf@x
            \pgf@circ@res@left = \pgf@x
            #2%
        }
    }
}


% these are deprecated anchors (really I do not know what they are --- Romano.)
% They are here for compatibility, I suppose. Don't use.
\def\pgf@circ@drawtransformerbasicanchor{
    % \ctikzvalof{quadpoles/trans/height}
    \anchor{AA2}{
        \northwest
        \pgf@x=\ctikzvalof{quadpoles/transformer/width1}\pgf@x
        \pgf@x=.7\pgf@x
        \pgf@y=-\pgf@y
        \pgf@y=\ctikzvalof{quadpoles/transformer/height1}\pgf@y
    }
    \anchor{BB1}{
        \northwest
        \pgf@x=-\pgf@x
        \pgf@x=\ctikzvalof{quadpoles/transformer/width1}\pgf@x
        \pgf@x=.7\pgf@x
        \pgf@y=\ctikzvalof{quadpoles/transformer/height1}\pgf@y
    }
    \anchor{AA1}{
        \northwest
        \pgf@x=\ctikzvalof{quadpoles/transformer/width1}\pgf@x
        \pgf@x=.7\pgf@x
        \pgf@y=\ctikzvalof{quadpoles/transformer/height1}\pgf@y
    }
    \anchor{BB2}{
        \northwest
        \pgf@x=-\pgf@x
        \pgf@x=\ctikzvalof{quadpoles/transformer/width1}\pgf@x
        \pgf@x=.7\pgf@x
        \pgf@y=-\pgf@y
        \pgf@y=\ctikzvalof{quadpoles/transformer/height1}\pgf@y
    }
}

%% Null styles that can be used to change individually the L1 and L2
%% inductors of the transformer.

\ctikzset{transformer L1/.style={}}
\ctikzset{transformer L2/.style={}}

\def\pgf@circ@drawtransformerbasicbody{
    \pgfscope
        \pgfslopedattimetrue
        \pgfallowupsidedownattimetrue
        \pgftransformlineattime{.5}{%
            \pgfpoint%
            {\stretto\pgf@circ@res@left}%
            {\pgf@circ@res@up}%
            }{%
            \pgfpoint
            {\stretto\pgf@circ@res@left}%
            {\pgf@circ@res@down}%
        }

        \pgfkeys{\circuitikzbasekey/.cd, transformer L1}
        \edef\pgf@circ@temp{\ctikzvalof{inductor}}%
        \def\pgf@temp{european}%
        \ifx\pgf@temp\pgf@circ@temp%
            \pgfnode{fullgenericshape}{center}{}{\thisshape-L1}{\pgfusepath{stroke}}
        \else%
            \def\pgf@temp{cute}
            \ifx\pgf@temp\pgf@circ@temp%
                \pgfnode{cuteinductorshape}{center}{}{\thisshape-L1}{\pgfusepath{stroke}}
            \else%
                \pgfnode{americaninductorshape}{center}{}{\thisshape-L1}{\pgfusepath{stroke}}
            \fi%
        \fi%


    \endpgfscope
    \pgfscope
        \pgfslopedattimetrue
        \pgfallowupsidedownattimetrue
        \pgftransformlineattime{.5}{%
            \pgfpoint%
            {\stretto\pgf@circ@res@right}%
            {\pgf@circ@res@down}%
            }{%
            \pgfpoint
            {\stretto\pgf@circ@res@right}%
            {\pgf@circ@res@up}%
        }

        \pgfkeys{\circuitikzbasekey/.cd, transformer L2}
        \edef\pgf@circ@temp{\ctikzvalof{inductor}}%
        \def\pgf@temp{european}%
        \ifx\pgf@temp\pgf@circ@temp%
            \pgfnode{fullgenericshape}{center}{}{\thisshape-L2}{\pgfusepath{stroke}}
        \else%
            \def\pgf@temp{cute}
            \ifx\pgf@temp\pgf@circ@temp%
                \pgfnode{cuteinductorshape}{center}{}{\thisshape-L2}{\pgfusepath{stroke}}
            \else%
                \pgfnode{americaninductorshape}{center}{}{\thisshape-L2}{\pgfusepath{stroke}}
            \fi%
        \fi%

    \endpgfscope

    \pgfpathmoveto{\pgfpoint{\pgf@circ@res@left}{\pgf@circ@res@up}}
    \pgfpathlineto{\pgfpoint{\stretto\pgf@circ@res@left}{\pgf@circ@res@up}}
    \pgfpathlineto{\pgfpointanchor{\thisshape-L1}{b}}

    \pgfpathmoveto{\pgfpointanchor{\thisshape-L1}{a}}
    \pgfpathlineto{\pgfpoint{\stretto\pgf@circ@res@left}{\pgf@circ@res@down}}
    \pgfpathlineto{\pgfpoint{\pgf@circ@res@left}{\pgf@circ@res@down}}

    \pgfpathmoveto{\pgfpoint{\pgf@circ@res@right}{\pgf@circ@res@up}}
    \pgfpathlineto{\pgfpoint{\stretto\pgf@circ@res@right}{\pgf@circ@res@up}}
    \pgfpathlineto{\pgfpointanchor{\thisshape-L2}{a}}

    \pgfpathmoveto{\pgfpointanchor{\thisshape-L2}{b}}
    \pgfpathlineto{\pgfpoint{\stretto\pgf@circ@res@right}{\pgf@circ@res@down}}
    \pgfpathlineto{\pgfpoint{\pgf@circ@res@right}{\pgf@circ@res@down}}

    \pgfusepath{draw}

}


\pgfcircdeclarequadpole{transformer}{
    \pgf@circ@drawtransformerbasicbody
}{\pgf@circ@drawtransformerbasicanchor}

\pgfcircdeclarequadpole{transformer core}{

    \pgf@circ@drawtransformerbasicbody

    % use the chocke line thickness
    \pgfsetlinewidth{\ctikzvalof{bipoles/cutechoke/cthick}*\ctikzvalof{transformer core/relative thickness}*\pgflinewidth}
    \pgf@circ@subset@color@dash{transformer core}

    % Find the distance from center for the lines representing the core
    % the 2.5 is for backward compatibility --- the distance was calculated as a fraction
    % of the whole component, now as a fraction of the distance between coils, to be
    % compatible with the quadpoles "inner" style.
    \pgfmathsetlength{\pgf@circ@res@other}{2.5*\stretto*\ctikzvalof{quadpoles/transformer core/core width}*\pgf@circ@res@right}

    \pgfpathmoveto{\pgfpoint%
        {\pgf@circ@res@other}%
        {\ctikzvalof{quadpoles/transformer core/core height}\pgf@circ@res@down}%
    }
    \pgfpathlineto{
        \pgfpoint%
        {\pgf@circ@res@other}%
        {\ctikzvalof{quadpoles/transformer core/core height}\pgf@circ@res@up}%
    }

    %% this should be just -\pgf@circ@res@other, but in case someone define an asymmetric trafo someday...
    \pgfmathsetlength{\pgf@circ@res@other}{2.5*\stretto*\ctikzvalof{quadpoles/transformer core/core width}*\pgf@circ@res@left}
    \pgfpathmoveto{\pgfpoint%
        {\pgf@circ@res@other}%
        {\ctikzvalof{quadpoles/transformer core/core height}\pgf@circ@res@down}%
    }
    \pgfpathlineto{
        \pgfpoint%
        {\pgf@circ@res@other}%
        {\ctikzvalof{quadpoles/transformer core/core height}\pgf@circ@res@up}%
    }

    \pgf@circ@setlinewidth{bipoles}{\pgflinewidth}
    \pgfusepath{draw}
}{\pgf@circ@drawtransformerbasicanchor}


\pgfcircdeclarequadpole{gyrator}{

    \pgfpathmoveto{\pgfpoint{\pgf@circ@res@left}{\pgf@circ@res@up}}
    \pgfpathlineto{\pgfpoint{\stretto\pgf@circ@res@left}{\pgf@circ@res@up}}
    \pgfpathlineto{\pgfpoint{\stretto\pgf@circ@res@left}{\pgf@circ@res@down}}
    \pgfpathlineto{\pgfpoint{\pgf@circ@res@left}{\pgf@circ@res@down}}

    \pgfpathmoveto{\pgfpoint{\pgf@circ@res@right}{\pgf@circ@res@up}}
    \pgfpathlineto{\pgfpoint{\stretto\pgf@circ@res@right}{\pgf@circ@res@up}}
    \pgfpathlineto{\pgfpoint{\stretto\pgf@circ@res@right}{\pgf@circ@res@down}}
    \pgfpathlineto{\pgfpoint{\pgf@circ@res@right}{\pgf@circ@res@down}}

    \pgfusepath{draw}

    \pgf@circ@setlinewidth{quadpoles}{\pgflinewidth}
    \pgfmathsetlength{\pgf@circ@res@other}{min(.7*\stretto*\pgf@circ@res@up, .8*\pgf@circ@res@right)} % radius
    \pgfpathmoveto{\pgfpoint{\stretto\pgf@circ@res@left}{-\pgf@circ@res@other}}
    \pgfpatharc{-90}{90}{\pgf@circ@res@other}
    \pgfpathclose
    \pgf@circ@draworfill

    \pgfpathmoveto{\pgfpoint{\stretto\pgf@circ@res@right}{\pgf@circ@res@other}}
    \pgfpatharc{90}{270}{\pgf@circ@res@other}
    \pgfpathclose
    \pgf@circ@draworfill
}{}
% %>>>

% Node shapes for generic double bipoles %<<<
%
\long\def\pgfcircdeclaredbipole#1#2#3{
    \pgfdeclareshape{#1}
    {
        \savedmacro{\ctikzclass}{\edef\ctikzclass{misc}}
        \saveddimen{\scaledRlen}{\pgfmathsetlength{\pgf@x}{\ctikzvalof{\ctikzclass/scale}\pgf@circ@Rlen}}
        % shapename
        \savedmacro{\thisshape}{\def\thisshape{\tikz@fig@name}}
        \savedmacro{\stretto}{\def\stretto{\ctikzvalof{quadpoles/#1/inner}}}
        \savedanchor\northwest{%
            \pgfmathsetlength{\pgf@circ@scaled@Rlen}{\ctikzvalof{\ctikzclass/scale}\pgf@circ@Rlen}
            \pgf@y=\ctikzvalof{quadpoles/#1/height}\pgf@circ@scaled@Rlen
            \pgf@y=.5\pgf@y
            \pgf@x=.5\pgf@circ@scaled@Rlen
            \pgf@x=-\ctikzvalof{quadpoles/#1/width}\pgf@x
        }
        %% we define the upper right (positive coord) inner and outer dot (near B1)
        %% in the generic case, we just place the dot position in a fixed spot
        %% we do not know the width of the component there...
        \savedanchor{\innerdot}{%
            \pgfmathsetlength{\pgf@circ@scaled@Rlen}{\ctikzvalof{\ctikzclass/scale}\pgf@circ@Rlen}
            \pgf@xa=.5\pgf@circ@scaled@Rlen
            \pgf@xa=-\ctikzvalof{quadpoles/#1/width}\pgf@xa
            \pgfmathsetlength\pgf@x{-0.5*\stretto*\pgf@xa}
            \pgfmathsetlength\pgf@y{0.5*\pgf@circ@scaled@Rlen}
        }
        \savedanchor{\outerdot}{%
            \pgfmathsetlength{\pgf@circ@scaled@Rlen}{\ctikzvalof{\ctikzclass/scale}\pgf@circ@Rlen}
            \pgf@xa=.5\pgf@circ@scaled@Rlen
            \pgf@xa=-\ctikzvalof{quadpoles/#1/width}\pgf@xa
            \pgfmathsetlength\pgf@x{-1.5*\stretto*\pgf@xa}
            \pgfmathsetlength\pgf@y{0.5*\pgf@circ@scaled@Rlen}
        }
        % geographical
        \anchor{center}{\northwest\pgf@x=0pt\pgf@y=0pt}
        \pgfcirc@northwest@symmetric@geoanchors
        \anchor{base}{\northwest\pgf@x=0pt}
        % external wires
        \anchor{A2}{\northwest\pgf@y=-\pgf@y}
        \anchor{B1}{\northwest\pgf@x=-\pgf@x}
        \anchor{A1}{\northwest}
        \anchor{B2}{\northwest\pgf@x=-\pgf@x \pgf@y=-\pgf@y}
        %% dot's anchors
        \anchor{inner dot A1}{\innerdot\pgf@x=-\pgf@x}
        \anchor{outer dot A1}{\outerdot\pgf@x=-\pgf@x}
        \anchor{inner dot A2}{\innerdot\pgf@x=-\pgf@x\pgf@y=-\pgf@y}
        \anchor{outer dot A2}{\outerdot\pgf@x=-\pgf@x\pgf@y=-\pgf@y}
        \anchor{inner dot B1}{\innerdot}
        \anchor{outer dot B1}{\outerdot}
        \anchor{inner dot B2}{\innerdot\pgf@y=-\pgf@y}
        \anchor{outer dot B2}{\outerdot\pgf@y=-\pgf@y}
        % text above
        \anchor{text}{
            \northwest
            \pgf@x=\dimexpr -.5\wd\pgfnodeparttextbox\relax
            \advance\pgf@y by .6\ht\pgfnodeparttextbox\relax
        }
        #3%
        \pgf@circ@draw@component{
            \pgf@circ@setcolor
            \northwest
            \pgf@circ@res@up = \pgf@y
            \pgf@circ@res@down = -\pgf@y
            \pgf@circ@res@right = -\pgf@x
            \pgf@circ@res@left = \pgf@x
            #2%
        }
    }
}

\ctikzset{every double bipole L/.style={}}
\ctikzset{every double bipole R/.style={}}
\ctikzset{double bipole L/.initial=genericshape}
\ctikzset{double bipole R/.initial=vsourceAMshape}
\newif\ifpgf@circ@dbipoleL@invert\pgf@circ@dbipoleL@invertfalse
\newif\ifpgf@circ@dbipoleR@invert\pgf@circ@dbipoleR@invertfalse
\ctikzset{double bipole L invert/.is if=pgf@circ@dbipoleL@invert}
\ctikzset{double bipole R invert/.is if=pgf@circ@dbipoleR@invert}

\def\pgf@circ@drawdbipolebasicbody{
    \pgfscope
        \ifpgf@circ@dbipoleL@invert
            \pgf@circ@res@temp=\pgf@circ@res@down
            \pgf@circ@res@other=\pgf@circ@res@up
        \else
            \pgf@circ@res@temp=\pgf@circ@res@up
            \pgf@circ@res@other=\pgf@circ@res@down
        \fi
        \pgfslopedattimetrue
        \pgfallowupsidedownattimetrue
        \pgftransformlineattime{.5}{%
            \pgfpoint%
            {\stretto\pgf@circ@res@left}%
            {\pgf@circ@res@temp}%
        }{%
            \pgfpoint
            {\stretto\pgf@circ@res@left}%
            {\pgf@circ@res@other}%
        }
        \pgfkeys{\circuitikzbasekey/.cd,  every double bipole L}
        \edef\pgf@circ@temp{\ctikzvalof{double bipole L}}%
        \pgfnode{\pgf@circ@temp}{center}{}{\thisshape-L}{\pgfusepath{stroke}}
    \endpgfscope
    \pgfscope
        \ifpgf@circ@dbipoleR@invert
            \pgf@circ@res@temp=\pgf@circ@res@down
            \pgf@circ@res@other=\pgf@circ@res@up
        \else
            \pgf@circ@res@temp=\pgf@circ@res@up
            \pgf@circ@res@other=\pgf@circ@res@down
        \fi
        \pgfslopedattimetrue
        \pgfallowupsidedownattimetrue
        \pgftransformlineattime{.5}{%
            \pgfpoint%
            {\stretto\pgf@circ@res@right}%
            {\pgf@circ@res@other}%
        }{%
            \pgfpoint
            {\stretto\pgf@circ@res@right}%
            {\pgf@circ@res@temp}%
        }
        %
        \pgfkeys{\circuitikzbasekey/.cd, every double bipole R}
        \edef\pgf@circ@temp{\ctikzvalof{double bipole R}}%
        \pgfnode{\pgf@circ@temp}{center}{}{\thisshape-R}{\pgfusepath{stroke}}
    \endpgfscope
    %
    \pgfpathmoveto{\pgfpoint{\pgf@circ@res@left}{\pgf@circ@res@up}}
    \pgfpathlineto{\pgfpoint{\stretto\pgf@circ@res@left}{\pgf@circ@res@up}}
    \pgfpathlineto{\pgfpointanchor{\thisshape-L}{\ifpgf@circ@dbipoleL@invert a\else b\fi}}
    %
    \pgfpathmoveto{\pgfpointanchor{\thisshape-L}{\ifpgf@circ@dbipoleL@invert b\else a\fi}}
    \pgfpathlineto{\pgfpoint{\stretto\pgf@circ@res@left}{\pgf@circ@res@down}}
    \pgfpathlineto{\pgfpoint{\pgf@circ@res@left}{\pgf@circ@res@down}}
    %
    \pgfpathmoveto{\pgfpoint{\pgf@circ@res@right}{\pgf@circ@res@up}}
    \pgfpathlineto{\pgfpoint{\stretto\pgf@circ@res@right}{\pgf@circ@res@up}}
    \pgfpathlineto{\pgfpointanchor{\thisshape-R}{\ifpgf@circ@dbipoleR@invert b\else a\fi}}
    %
    \pgfpathmoveto{\pgfpointanchor{\thisshape-R}{\ifpgf@circ@dbipoleR@invert a\else b\fi}}
    \pgfpathlineto{\pgfpoint{\stretto\pgf@circ@res@right}{\pgf@circ@res@down}}
    \pgfpathlineto{\pgfpoint{\pgf@circ@res@right}{\pgf@circ@res@down}}
    \pgfusepath{draw}
}
\pgfcircdeclaredbipole{double bipole}{
    \pgf@circ@drawdbipolebasicbody
}{}


% %>>>

%%%%%%%%%%%%%%%%%%%
%% Block diagrams
%%%%%%%%%%%%%%%%%%%

% Definitions and options for blocks (twoports and so)%<<<1

\ctikzset{bipoles/twoport/width/.initial=.7}
\ctikzset{bipoles/twoport/height/.initial=.7}
\ctikzset{bipoles/twoport/text/.initial=}
\ctikzset{bipoles/twoportsplit/width/.initial=.7}
\ctikzset{bipoles/twoportsplit/height/.initial=.7}
\ctikzset{bipoles/twoport/text in/.initial=}
\ctikzset{bipoles/twoport/text out/.initial=}
\ctikzset{text/.style={t=#1}}
\ctikzset{t/.code={%
        \ctikzsetvalof{bipoles/twoport/text}{#1}%
}}
\ctikzset{text in/.style={t1=#1}}
\ctikzset{t1/.code={%
        \ctikzsetvalof{bipoles/twoport/text in}{#1}%
}}
\ctikzset{text out/.style={t2=#1}}
\ctikzset{t2/.code={%
        \ctikzsetvalof{bipoles/twoport/text out}{#1}%
}}
\ctikzset{bipoles/vco/width/.initial=.7}
\ctikzset{bipoles/bandpass/width/.initial=.7}
\ctikzset{bipoles/bandstop/width/.initial=.7}
\ctikzset{bipoles/highpass/width/.initial=.7}
\ctikzset{bipoles/highpass2/width/.initial=.7}
\ctikzset{bipoles/lowpass/width/.initial=.7}
\ctikzset{bipoles/lowpass2/width/.initial=.7}
\ctikzset{bipoles/allpass/width/.initial=.7}
\ctikzset{bipoles/adc/width/.initial=.7}
\ctikzset{bipoles/dac/width/.initial=.7}
\ctikzset{bipoles/dsp/width/.initial=.7}
\ctikzset{bipoles/fft/width/.initial=.7}
\ctikzset{bipoles/amp/width/.initial=.7}
\ctikzset{bipoles/iamp/width/.initial=.7}
\ctikzset{bipoles/vamp/width/.initial=.7}
\ctikzset{bipoles/piattenuator/width/.initial=.7}
\ctikzset{bipoles/vpiattenuator/width/.initial=.7}
\ctikzset{bipoles/tattenuator/width/.initial=.7}
\ctikzset{bipoles/vtattenuator/width/.initial=.7}
\ctikzset{bipoles/phaseshifter/width/.initial=.7}
\ctikzset{bipoles/vphaseshifter/width/.initial=.7}
\ctikzset{bipoles/detector/width/.initial=.7}
\ctikzset{bipoles/saturation/width/.initial=.7}
\ctikzset{bipoles/sigmoid/width/.initial=.7}
\ctikzset{bipoles/allornothing/width/.initial=.7}
\ctikzset{tripoles/mixer/width/.initial=0.7}
\ctikzset{tripoles/adder/width/.initial=0.7}
\ctikzset{tripoles/circulator/width/.initial=.7}
\ctikzset{tripoles/oscillator/width/.initial=.7}
\ctikzset{bipoles/fiber/width/.initial=.7}

\ctikzset{tripoles/wilkinson/height/.initial=1.3}
\ctikzset{tripoles/wilkinson/width/.initial=1.3}

\ctikzset{tripoles/splitter/height/.initial=1.3}
\ctikzset{tripoles/splitter/width/.initial=1.3}

\ctikzset{tripoles/genericsplitter/height/.initial=1.3}
\ctikzset{tripoles/genericsplitter/width/.initial=1.3}

\ctikzset{tripoles/mzm/height/.initial=1.3}
\ctikzset{tripoles/mzm/width/.initial=1.3}

% Option ">" for twoports
\newif\ifpgf@circuit@inputarrow
\ctikzset{>/.add code={}{\pgf@circuit@inputarrowtrue}}
\ctikzset{inputarrow/.is choice}
\ctikzset{inputarrow/true/.code={\pgf@circuit@inputarrowtrue}}
\ctikzset{inputarrow/false/.code={\pgf@circuit@inputarrowfalse}}

% Option "boxed" for nodes and twoports
\newif\ifpgf@circuit@boxed
\newif\ifpgf@circuit@boxedcircled\pgf@circuit@boxedcircledtrue
\pgfkeys{/tikz/boxed/.add code={}{\pgf@circuit@boxedtrue\pgf@circuit@boxedcircledtrue}}
\ctikzset{boxed/.add code={}{\pgf@circuit@boxedtrue\pgf@circuit@boxedcircledtrue}}
\pgfkeys{/tikz/box/.add code={}{\pgf@circuit@boxedtrue\pgf@circuit@boxedcircledtrue}}
\ctikzset{box/.add code={}{\pgf@circuit@boxedtrue\pgf@circuit@boxedcircledtrue}}
% boxed, no circle
\pgfkeys{/tikz/boxed only/.add code={}{\pgf@circuit@boxedtrue\pgf@circuit@boxedcircledfalse}}
\ctikzset{boxed only/.add code={}{\pgf@circuit@boxedtrue\pgf@circuit@boxedcircledfalse}}
\pgfkeys{/tikz/box only/.add code={}{\pgf@circuit@boxedtrue\pgf@circuit@boxedcircledfalse}}
\ctikzset{box only/.add code={}{\pgf@circuit@boxedtrue\pgf@circuit@boxedcircledfalse}}

% Option "dashed" for nodes and twoports
\newif\ifpgf@circuit@dashed
\pgfkeys{/tikz/dashed/.add code={}{\pgf@circuit@dashedtrue}}
\ctikzset{dashed/.add code={}{\pgf@circuit@dashedtrue}}%
% Also draw internal things dashed
\newif\ifpgf@circuit@full@dashed
\ctikzset{inner blocks dashed/.is if=pgf@circuit@full@dashed}%
% Default block dash
\ctikzset{dashed blocks pattern/.initial={{0.1cm}{0.1cm}}}
%
% powerelectronic blocks
\ctikzset{bipoles/sacdc/width/.initial=.7}
\ctikzset{bipoles/sdcac/width/.initial=.7}
\ctikzset{bipoles/sdcdc/width/.initial=.7}
\ctikzset{bipoles/tacdc/width/.initial=.7}
\ctikzset{bipoles/tdcac/width/.initial=.7}
\ctikzset{quadpoles/gridnode/width/.initial=.7} %not sure if quadpole?

%>>>

%% Node shapes definition for path-style block diagrams%<<<

%% Draw the two-port fillable box
\def\pgf@circ@twoportbox{%
    \pgfscope
        \pgf@circ@setlinewidth{bipoles}{\pgfstartlinewidth}%
        \pgfpathrectanglecorners{\pgfpoint{\pgf@circ@res@left}{\pgf@circ@res@up}}{\pgfpoint{\pgf@circ@res@right}{\pgf@circ@res@down}}%
        \pgf@circ@draworfill
    \endpgfscope
}
\def\pgf@circ@inputarrow{%
    \ifpgf@circuit@inputarrow
        {%
            % Remove this: the line will overrun the tip, resulting in bad look. See issue #613, thanks to Laurenz Preindl
            % \advance \pgf@circ@res@left by -.5\ctikzvalof{bipoles/thickness}\pgfstartlinewidth
            \pgftransformshift{\pgfpoint{\pgf@circ@res@left}{0pt}}%
            \pgfnode{inputarrow}{tip}{}{pgf@inputarrow}{\pgfusepath{fill}}%
        }%
    \fi
}
%%% blocks additional anchors
\ctikzset{block left anchors pos/.initial=0.5}
\ctikzset{block right anchors pos/.initial=0.5}
\ctikzset{block lateral anchors pos/.code={
    \ctikzset{block left anchors pos=#1}%
    \ctikzset{block right anchors pos=#1}%
}}
\def\pgcirc@twoport@additional@anchors{%
    \savedmacro{\blockleftanchorpos}{\edef\blockleftanchorpos{\ctikzvalof{block left anchors pos}}}
    \savedmacro{\blockrightanchorpos}{\edef\blockrightanchorpos{\ctikzvalof{block right anchors pos}}}
    \anchor{right down}{\northeast\pgf@y=-\blockrightanchorpos\pgf@y}
    \anchor{left down}{\northeast\pgf@x=-\pgf@x\pgf@y=-\blockleftanchorpos\pgf@y}
    \anchor{left up}{\northeast\pgf@x=-\pgf@x\pgf@y=\blockleftanchorpos\pgf@y}
    \anchor{right up}{\northeast\pgf@y=\blockrightanchorpos\pgf@y}
    \anchor{up}{\northeast\pgf@x=0pt\relax}
    \anchor{down}{\northeast\pgf@y=-\pgf@y\pgf@x=0pt\relax}
}

%%% definition to help define the blocks. Notice that the height, width, etc are different, so we can't
%%% simplify more...
\def\pfgcirc@twoport@get@symbol@rotation{
    %%% put the needed rotation in \@@rotation
    \def\pgfcircmathresult{\expandafter\pgf@circ@stripdecimals\pgf@circ@direction\pgf@nil}
    \def\@@rotation{0}
    \ifnum \pgfcircmathresult > 45 \ifnum \pgfcircmathresult < 135
        \def\@@rotation{270}
    \fi\fi
    \ifnum \pgfcircmathresult > 134 \ifnum \pgfcircmathresult < 225
        \def\@@rotation{180}
    \fi\fi
    \ifnum \pgfcircmathresult > 224 \ifnum \pgfcircmathresult < 315
        \def\@@rotation{90}
    \fi\fi
}
%
\def\pfgcirc@twoport@rotate@inner@symbol{%
    % rotate inner symbol
    \pfgcirc@twoport@get@symbol@rotation
    \pgftransformrotate{\@@rotation}
}
% enact dashing if needed
\def\pgfcirc@twoport@maybedash{%
    \ifpgf@circuit@dashed
    \edef\@@tmp{\ctikzvalof{dashed blocks pattern}}
    \expandafter\pgfsetdash\expandafter{\@@tmp}{0cm}
    \fi
}
% debug
\def\@@printrot{%
    \pgfsetcolor{red}
    \pgftext[center,x=0,y=0,]{\tiny\ttfamily\pgf@circ@direction > \@@rotation}
}
%
\def\pgfcirc@twoport@setup#1{%
    \pgf@circ@res@step = #1\pgf@circ@scaled@Rlen%6 is the real width parameter
    \divide \pgf@circ@res@step by 2
    \pgfsetdash{}{0pt}	% always draw solid line for inner symbol
    \pgfsetarrows{-}
    % let set the dash for the next operations
    \pgfcirc@twoport@maybedash
}
%
\def\pgfcirc@twoport@draw@sine#1#2{% #1 -> y shift; #2 -> crossed out if != 0
    % draw inner sine waves; ...res@step must be defined
    \pgfscope
        \pgfsetlinewidth{\pgfstartlinewidth}
        \pgftransformyshift{#1\pgf@circ@res@step}
        \pgfpathmoveto{\pgfpoint{-.5\pgf@circ@res@step}{0\pgf@circ@res@step}}
        \pgfpathsine{\pgfpoint{.25\pgf@circ@res@step}{.25\pgf@circ@res@step}}
        \pgfpathcosine{\pgfpoint{.25\pgf@circ@res@step}{-.25\pgf@circ@res@step}}
        \pgfpathsine{\pgfpoint{.25\pgf@circ@res@step}{-.25\pgf@circ@res@step}}
        \pgfpathcosine{\pgfpoint{.25\pgf@circ@res@step}{.25\pgf@circ@res@step}}
        \ifnum #2=0\else
            \pgfpathmoveto{\pgfpoint{0.15\pgf@circ@res@step}{0.15\pgf@circ@res@step}}
            \pgfpathlineto{\pgfpoint{-0.15\pgf@circ@res@step}{-0.15\pgf@circ@res@step}}
        \fi
        \pgfusepath{draw}
    \endpgfscope
}
%
\def\pgfcirc@twoport@draw@splitline{%
    \pgfscope
        \pgfcirc@twoport@maybedash
        \pgfsetlinewidth{\pgfstartlinewidth}
        \pgfpathmoveto{\pgfpoint{\pgf@circ@res@left}{\pgf@circ@res@down}}
        \pgfpathlineto{\pgfpoint{\pgf@circ@res@right}{\pgf@circ@res@up}}
        \pgfusepath{draw}
    \endpgfscope
}
%
\long\def\pgfcirc@define@twoports#1#2#3#4#5#6#7{
\pgfcircdeclarebipolescaled{#1}
    {
        \pgcirc@twoport@additional@anchors
        #2
    }
    {#3}
    {#4}
    {#5}
    {#6}
    {
        \pgfcirc@twoport@setup{#6}
        % draw outer box
        \pgf@circ@twoportbox
        % draw solid line for inner symbol if no box is drawn and not fully dashed
        \ifpgf@circuit@full@dashed\else\pgfsetdash{}{0pt}\fi
        \pgf@circ@inputarrow
        \pfgcirc@twoport@rotate@inner@symbol
        #7
    }
}
%
\long\def\pgfcirc@define@twoports@norotate#1#2#3#4#5#6#7{
\pgfcircdeclarebipolescaled{#1}
    {
        \pgcirc@twoport@additional@anchors
        #2
    }
    {#3}
    {#4}
    {#5}
    {#6}
    {
        \pgfcirc@twoport@setup{#6}
        % draw outer box
        \pgf@circ@twoportbox
        % draw solid line for inner symbol if no box is drawn and not fully dashed
        \ifpgf@circuit@full@dashed\else\pgfsetdash{}{0pt}\fi
        \pgf@circ@inputarrow
        #7
    }
}
%% Generic two port box
\pgfcirc@define@twoports{blocks}
{}
{\ctikzvalof{bipoles/twoport/height}}
{twoport}
{\ctikzvalof{bipoles/twoport/height}}
{\ctikzvalof{bipoles/twoport/width}}
{
    % draw inner symbol
    \pgf@circ@text@strokecolor
    \pgftext[center,x=0,y=0]{\ctikzvalof{bipoles/twoport/text}}

}
%% twoport split
\pgfcirc@define@twoports{blocks}
{}
{\ctikzvalof{bipoles/twoportsplit/height}}
{twoportsplit}
{\ctikzvalof{bipoles/twoportsplit/height}}
{\ctikzvalof{bipoles/twoportsplit/width}}
{
    %get texts
    \def\pgfcirc@tin{\ctikzvalof{bipoles/twoport/text in}}
    \def\pgfcirc@tout{\ctikzvalof{bipoles/twoport/text out}}
    % shuffle text depending on rotation
    \pgfcirc@twoport@draw@splitline
    %
    \pgf@circ@text@strokecolor
    \ifnum\@@rotation<145
        \pgftext[center,x=0.45\pgf@circ@res@left,y=0.45\pgf@circ@res@up]{\pgfcirc@tin}
        \pgftext[center,x=0.45\pgf@circ@res@right,y=0.45\pgf@circ@res@down]{\pgfcirc@tout}
    \else
        \pgftext[center,x=0.45\pgf@circ@res@left,y=0.45\pgf@circ@res@up]{\pgfcirc@tout}
        \pgftext[center,x=0.45\pgf@circ@res@right,y=0.45\pgf@circ@res@down]{\pgfcirc@tin}
    \fi
}
%% bandpass filter
\pgfcirc@define@twoports{blocks}
{}
{\ctikzvalof{bipoles/bandpass/width}}
{bandpass}
{\ctikzvalof{bipoles/bandpass/width}}
{\ctikzvalof{bipoles/bandpass/width}}
{
    \pgfcirc@twoport@draw@sine{0.5}{1}
    \pgfcirc@twoport@draw@sine{0.0}{0}
    \pgfcirc@twoport@draw@sine{-0.5}{1}
}
%% bandstop filter
\pgfcirc@define@twoports{blocks}
{}
{\ctikzvalof{bipoles/bandstop/width}}
{bandstop}
{\ctikzvalof{bipoles/bandstop/width}}
{\ctikzvalof{bipoles/bandstop/width}}
{
    \pgfcirc@twoport@draw@sine{0.5}{0}
    \pgfcirc@twoport@draw@sine{0.0}{1}
    \pgfcirc@twoport@draw@sine{-0.5}{0}
}
%% highpass filter
\pgfcirc@define@twoports{blocks}
{}
{\ctikzvalof{bipoles/highpass/width}}
{highpass}
{\ctikzvalof{bipoles/highpass/width}}
{\ctikzvalof{bipoles/highpass/width}}
{
    \pgfcirc@twoport@draw@sine{0.5}{0}
    \pgfcirc@twoport@draw@sine{0.0}{1}
    \pgfcirc@twoport@draw@sine{-0.5}{1}
}
%% highpass2 filter ---simplyfied with just two waves
\pgfcirc@define@twoports{blocks}
{}
{\ctikzvalof{bipoles/highpass2/width}}
{highpass2}
{\ctikzvalof{bipoles/highpass2/width}}
{\ctikzvalof{bipoles/highpass2/width}}
{
    \pgfcirc@twoport@draw@sine{0.25}{0}
    \pgfcirc@twoport@draw@sine{-0.25}{1}
}
%% lowpass filter
\pgfcirc@define@twoports{blocks}
{}
{\ctikzvalof{bipoles/lowpass/width}}
{lowpass}
{\ctikzvalof{bipoles/lowpass/width}}
{\ctikzvalof{bipoles/lowpass/width}}
{
    \pgfcirc@twoport@draw@sine{0.5}{1}
    \pgfcirc@twoport@draw@sine{0.0}{1}
    \pgfcirc@twoport@draw@sine{-0.5}{0}
}
%% lowpass2 filter: simplyfied with just two waves
\pgfcirc@define@twoports{blocks}
{}
{\ctikzvalof{bipoles/lowpass2/width}}
{lowpass2}
{\ctikzvalof{bipoles/lowpass2/width}}
{\ctikzvalof{bipoles/lowpass2/width}}
{
    \pgfcirc@twoport@draw@sine{0.25}{1}
    \pgfcirc@twoport@draw@sine{-0.25}{0}
}
%% allpass filter
\pgfcirc@define@twoports{blocks}
{}
{\ctikzvalof{bipoles/allpass/width}}
{allpass}
{\ctikzvalof{bipoles/allpass/width}}
{\ctikzvalof{bipoles/allpass/width}}
{
    \pgfcirc@twoport@draw@sine{0.5}{0}
    \pgfcirc@twoport@draw@sine{0.0}{0}
    \pgfcirc@twoport@draw@sine{-0.5}{0}
}
%% ADC
\pgfcirc@define@twoports{blocks}
{}
{\ctikzvalof{bipoles/adc/width}}
{adc}
{\ctikzvalof{bipoles/adc/width}}
{\ctikzvalof{bipoles/adc/width}}
{
    \pgfcirc@twoport@draw@splitline
    %
    \pgf@circ@text@strokecolor
    \ifnum\@@rotation<145
        \pgftext[center,x=0.45\pgf@circ@res@left,y=0.45\pgf@circ@res@up]{A}
        \pgftext[center,x=0.45\pgf@circ@res@right,y=0.45\pgf@circ@res@down]{D}
    \else
        \pgftext[center,x=0.45\pgf@circ@res@left,y=0.45\pgf@circ@res@up]{D}
        \pgftext[center,x=0.45\pgf@circ@res@right,y=0.45\pgf@circ@res@down]{A}
    \fi
}

%% DAC
\pgfcirc@define@twoports{blocks}
{}
{\ctikzvalof{bipoles/dac/width}}
{dac}
{\ctikzvalof{bipoles/dac/width}}
{\ctikzvalof{bipoles/dac/width}}
{
    \pgfcirc@twoport@draw@splitline
    %
    \pgf@circ@text@strokecolor
    \ifnum\@@rotation<145
        \pgftext[center,x=0.45\pgf@circ@res@left,y=0.45\pgf@circ@res@up]{D}
        \pgftext[center,x=0.45\pgf@circ@res@right,y=0.45\pgf@circ@res@down]{A}
    \else
        \pgftext[center,x=0.45\pgf@circ@res@left,y=0.45\pgf@circ@res@up]{A}
        \pgftext[center,x=0.45\pgf@circ@res@right,y=0.45\pgf@circ@res@down]{D}
    \fi
}

%% DSP
\pgfcirc@define@twoports{blocks}
{}
{\ctikzvalof{bipoles/dsp/width}}
{dsp}
{\ctikzvalof{bipoles/dsp/width}}
{\ctikzvalof{bipoles/dsp/width}}
{
    \pgf@circ@text@strokecolor
    \pgftext[center,x=0,y=0]{\textsf{DSP}}
}
%% FFT
\pgfcirc@define@twoports{blocks}
{}
{\ctikzvalof{bipoles/fft/width}}
{fft}
{\ctikzvalof{bipoles/fft/width}}
{\ctikzvalof{bipoles/fft/width}}
{
    \pgf@circ@text@strokecolor
    \pgftext[center,x=0,y=0]{\textsf{FFT}}
}
%% pi attenuator
\pgfcirc@define@twoports{blocks}
{}
{\ctikzvalof{bipoles/piattenuator/width}}
{piattenuator}
{\ctikzvalof{bipoles/piattenuator/width}}
{\ctikzvalof{bipoles/piattenuator/width}}
{
    % draw inner symbol
    \pgfsetlinewidth{\pgfstartlinewidth}
    \pgfpathmoveto{\pgfpoint{0.4\pgf@circ@res@left}{0.4\pgf@circ@res@down}}
    \pgfpathlineto{\pgfpoint{0.4\pgf@circ@res@left}{0.4\pgf@circ@res@up}}
    \pgfpathmoveto{\pgfpoint{0.4\pgf@circ@res@right}{0.4\pgf@circ@res@down}}
    \pgfpathlineto{\pgfpoint{0.4\pgf@circ@res@right}{0.4\pgf@circ@res@up}}
    \pgfpathmoveto{\pgfpoint{0.6\pgf@circ@res@left}{0.4\pgf@circ@res@up}}
    \pgfpathlineto{\pgfpoint{0.6\pgf@circ@res@right}{0.4\pgf@circ@res@up}}
    \pgfusepath{draw}
}
%% variable pi attenuator
\pgfcirc@define@twoports{blocks}
{}
{\ctikzvalof{bipoles/vpiattenuator/width}}
{vpiattenuator}
{\ctikzvalof{bipoles/vpiattenuator/width}}
{\ctikzvalof{bipoles/vpiattenuator/width}}
{
    % draw inner symbol
    \pgfsetlinewidth{\pgfstartlinewidth}
    \pgfpathmoveto{\pgfpoint{0.4\pgf@circ@res@left}{0.4\pgf@circ@res@down}}
    \pgfpathlineto{\pgfpoint{0.4\pgf@circ@res@left}{0.4\pgf@circ@res@up}}
    \pgfpathmoveto{\pgfpoint{0.4\pgf@circ@res@right}{0.4\pgf@circ@res@down}}
    \pgfpathlineto{\pgfpoint{0.4\pgf@circ@res@right}{0.4\pgf@circ@res@up}}
    \pgfpathmoveto{\pgfpoint{0.6\pgf@circ@res@left}{0.4\pgf@circ@res@up}}
    \pgfpathlineto{\pgfpoint{0.6\pgf@circ@res@right}{0.4\pgf@circ@res@up}}
    \pgfusepath{draw}
    \pgfcirc@set@arrows{tunable}{}{latex}
    \pgfpathmoveto{\pgfpoint{0.7\pgf@circ@res@left}{0.5\pgf@circ@res@down}}
    \pgfpathlineto{\pgfpoint{0.7\pgf@circ@res@right}{0.8\pgf@circ@res@up}}
    \pgfusepath{draw}
}
%% T attenuator
\pgfcirc@define@twoports{blocks}
{}
{\ctikzvalof{bipoles/tattenuator/width}}
{tattenuator}
{\ctikzvalof{bipoles/tattenuator/width}}
{\ctikzvalof{bipoles/tattenuator/width}}
{
    % draw inner symbol
    \pgfsetlinewidth{\pgfstartlinewidth}
    \pgfpathmoveto{\pgfpoint{0pt}{0.4\pgf@circ@res@down}}
    \pgfpathlineto{\pgfpoint{0pt}{0.4\pgf@circ@res@up}}
    \pgfpathmoveto{\pgfpoint{0.6\pgf@circ@res@left}{0.4\pgf@circ@res@up}}
    \pgfpathlineto{\pgfpoint{0.6\pgf@circ@res@right}{0.4\pgf@circ@res@up}}
    \pgfusepath{draw}
}
%% variable T attenuator
\pgfcirc@define@twoports{blocks}
{}
{\ctikzvalof{bipoles/vtattenuator/width}}
{vtattenuator}
{\ctikzvalof{bipoles/vtattenuator/width}}
{\ctikzvalof{bipoles/vtattenuator/width}}
{
    % draw inner symbol
    \pgfsetlinewidth{\pgfstartlinewidth}
    \pgfpathmoveto{\pgfpoint{0pt}{0.4\pgf@circ@res@down}}
    \pgfpathlineto{\pgfpoint{0pt}{0.4\pgf@circ@res@up}}
    \pgfpathmoveto{\pgfpoint{0.6\pgf@circ@res@left}{0.4\pgf@circ@res@up}}
    \pgfpathlineto{\pgfpoint{0.6\pgf@circ@res@right}{0.4\pgf@circ@res@up}}
    \pgfusepath{draw}
    \pgfcirc@set@arrows{tunable}{}{latex}
    \pgfpathmoveto{\pgfpoint{0.7\pgf@circ@res@left}{0.5\pgf@circ@res@down}}
    \pgfpathlineto{\pgfpoint{0.7\pgf@circ@res@right}{0.8\pgf@circ@res@up}}
    \pgfusepath{draw}
}
%% phase shifter
\pgfcirc@define@twoports{blocks}
{}
{\ctikzvalof{bipoles/phaseshifter/width}}
{phaseshifter}
{\ctikzvalof{bipoles/phaseshifter/width}}
{\ctikzvalof{bipoles/phaseshifter/width}}
{
    % inner symbol
    \pgf@circ@text@strokecolor
    \pgftext[center,x=0,y=0]{\Large$\varphi$}
}
%% variable phase shifter
\pgfcirc@define@twoports{blocks}
{}
{\ctikzvalof{bipoles/phaseshifter/width}}
{vphaseshifter}
{\ctikzvalof{bipoles/vphaseshifter/width}}
{\ctikzvalof{bipoles/vphaseshifter/width}}
{
    \pgfsetlinewidth{\pgfstartlinewidth}
    \pgfcirc@set@arrows{tunable}{}{latex}
    \pgfpathmoveto{\pgfpoint{0.75\pgf@circ@res@left}{0.65\pgf@circ@res@down}}
    \pgfpathlineto{\pgfpoint{0.7\pgf@circ@res@right}{0.65\pgf@circ@res@up}}
    \pgfusepath{draw}
    % inner symbol
    \pgf@circ@text@strokecolor
    \pgftext[center,x=0,y=0]{\Large$\varphi$}
}
%% detector
\pgfcirc@define@twoports@norotate{blocks}
{}
{\ctikzvalof{bipoles/detector/width}}
{detector}
{\ctikzvalof{bipoles/detector/width}}
{\ctikzvalof{bipoles/detector/width}}
{
    % draw inner stuff
    \pgfsetlinewidth{0.8\pgfstartlinewidth}
    \pgfpathmoveto{\pgfpoint{0.75\pgf@circ@res@left}{0}}
    \pgfpathlineto{\pgfpoint{0.75\pgf@circ@res@right}{0}}
    \pgfusepath{draw}
    \ifpgf@circuit@fulldiode
        \pgfmathparse{2\pgf@circ@res@up / \pgf@circ@scaled@Rlen / \ctikzvalof{bipoles/generic/width}}
        \pgftransformscale{\pgfmathresult}
        \pgfnode{fulldiodeshape}{center}{}{pgf@fulldiode}{\pgfusepath{fill}}
    \else
        \pgfmathparse{2\pgf@circ@res@up / \pgf@circ@scaled@Rlen / \ctikzvalof{bipoles/resistor/width}}
        \pgftransformscale{\pgfmathresult}
        \pgfnode{emptydiodeshape}{center}{}{pgf@emptydiode}{\pgfusepath{fill}}
    \fi
}
%% saturation block, contributed by P.Sacco <paul.sacco@estaca,eu>
\pgfcirc@define@twoports{blocks}
{}
{\ctikzvalof{bipoles/saturation/width}}
{saturation}
{\ctikzvalof{bipoles/saturation/width}}
{\ctikzvalof{bipoles/saturation/width}}
{
    \pgfsetlinewidth{1.2\pgfstartlinewidth}
    \pgfpathmoveto{\pgfpointorigin}
    \pgfpathlineto{\pgfpoint{.4\pgf@circ@res@step}{.4\pgf@circ@res@step}}
    \pgfpathlineto{\pgfpoint{0.65\pgf@circ@res@step}{.4\pgf@circ@res@step}}
    %
    \pgfpathmoveto{\pgfpointorigin}
    \pgfpathlineto{\pgfpoint{-.4\pgf@circ@res@step}{-.4\pgf@circ@res@step}}
    \pgfpathlineto{\pgfpoint{-0.65\pgf@circ@res@step}{-.4\pgf@circ@res@step}}
    \pgfusepath{draw}
}
%% sigmoid
\pgfcirc@define@twoports{blocks}
{}
{\ctikzvalof{bipoles/sigmoid/width}}
{sigmoid}
{\ctikzvalof{bipoles/sigmoid/width}}
{\ctikzvalof{bipoles/sigmoid/width}}
{
    \pgfsetlinewidth{1.2\pgfstartlinewidth}
    \pgfpathmoveto{\pgfpoint{-.65\pgf@circ@res@step}{-.4\pgf@circ@res@step}}
    \pgfpathlineto{\pgfpoint{-.45\pgf@circ@res@step}{-.4\pgf@circ@res@step}}
    \pgfpathparabola{\pgfpointorigin}{\pgfpoint{.45\pgf@circ@res@step}{.4\pgf@circ@res@step}}
    %
    \pgfpathmoveto{\pgfpoint{.65\pgf@circ@res@step}{.4\pgf@circ@res@step}}
    \pgfpathlineto{\pgfpoint{.45\pgf@circ@res@step}{.4\pgf@circ@res@step}}
    \pgfpathparabola{\pgfpointorigin}{\pgfpoint{-.45\pgf@circ@res@step}{-.4\pgf@circ@res@step}}
    \pgfusepath{draw}
}
%% all-or-nothing (comparator) block
\pgfcirc@define@twoports{blocks}
{}
{\ctikzvalof{bipoles/allornothing/width}}
{allornothing}
{\ctikzvalof{bipoles/allornothing/width}}
{\ctikzvalof{bipoles/allornothing/width}}
{
    \pgfsetlinewidth{1.2\pgfstartlinewidth}
    \pgfpathmoveto{\pgfpoint{-0.55\pgf@circ@res@step}{-.4\pgf@circ@res@step}}
    \pgfpathlineto{\pgfpoint{+0pt}{-.4\pgf@circ@res@step}}
    \pgfpathlineto{\pgfpoint{+0pt}{.4\pgf@circ@res@step}}
    \pgfpathlineto{\pgfpoint{0.55\pgf@circ@res@step}{.4\pgf@circ@res@step}}
    \pgfusepath{draw}
}
%% converters help function
%% definition for styling the DC symbols (GitHub issue #680)
\ctikzset{blocks dc in segments/.initial=1}
\ctikzset{blocks dc out segments/.initial=1}
\ctikzset{blocks dc segments/.code={%
        \ctikzset{blocks dc in segments=#1}%
        \ctikzset{blocks dc out segments=#1}%
    }
}
\def\pgf@circ@twoport@converter@dc#1#2{%
    \pgfscope
    \pgftransformshift{\pgfpoint{#1\pgf@circ@res@step}{#2\pgf@circ@res@step}}
    \pgfpathmoveto{\pgfpoint{-0.25\pgf@circ@res@step}{0.125\pgf@circ@res@step}}
    \pgfpathlineto{\pgfpoint{0.25\pgf@circ@res@step}{0.125\pgf@circ@res@step}}
    \pgfusepath{draw}
    \ifpgf@circuit@full@dashed\else % do not apply the specific dash if fully dashing
        \edef\@@up{\ctikzvalof{blocks dc in segments}}
        \edef\@@down{\ctikzvalof{blocks dc out segments}}
        \ifdim\dimexpr#1\pgf@circ@res@step\relax<0pt
            \pgfmathsetlength{\pgf@circ@res@other}{\pgf@circ@res@step/(4*\@@up-2)}
        \else
            \pgfmathsetlength{\pgf@circ@res@other}{\pgf@circ@res@step/(4*\@@down-2)}
        \fi
        \pgfsetdash{{\pgf@circ@res@other}{\pgf@circ@res@other}}{0pt}
    \fi
    \pgfpathmoveto{\pgfpoint{-0.25\pgf@circ@res@step}{-0.125\pgf@circ@res@step}}
    \pgfpathlineto{\pgfpoint{0.25\pgf@circ@res@step}{-0.125\pgf@circ@res@step}}
    \pgfusepath{draw}
    \endpgfscope
}
\def\pgf@circ@twoport@converter@dc@up{%
    \pgf@circ@twoport@converter@dc{-0.5}{0.5}
}
\def\pgf@circ@twoport@converter@dc@down{%
    \pgf@circ@twoport@converter@dc{0.5}{-0.5}
}
\def\pgf@circ@twoport@converter@ac#1#2{%
    \pgfscope
    \pgftransformshift{\pgfpoint{#1\pgf@circ@res@step}{#2\pgf@circ@res@step}}
    \pgfpathmoveto{\pgfpoint{-.31\pgf@circ@res@step}{0\pgf@circ@res@step}}
    \pgfpathsine{\pgfpoint{.17\pgf@circ@res@step}{.17\pgf@circ@res@step}}
    \pgfpathcosine{\pgfpoint{.17\pgf@circ@res@step}{-.17\pgf@circ@res@step}}
    \pgfpathsine{\pgfpoint{.17\pgf@circ@res@step}{-.17\pgf@circ@res@step}}
    \pgfpathcosine{\pgfpoint{.17\pgf@circ@res@step}{.17\pgf@circ@res@step}}
    \pgfusepath{draw}
    \endpgfscope
}
\def\pgf@circ@twoport@converter@ac@up{%
    \pgf@circ@twoport@converter@ac{-0.45}{0.5}
    }
\def\pgf@circ@twoport@converter@ac@down{%
    \pgf@circ@twoport@converter@ac{0.45}{-0.5}
}
\def\pgf@circ@twoport@converter@tac@up{%
    \pgf@circ@twoport@converter@ac{-0.45}{0.65}
    \pgf@circ@twoport@converter@ac{-0.45}{0.5}
    \pgf@circ@twoport@converter@ac{-0.45}{0.35}
}
\def\pgf@circ@twoport@converter@tac@down{%
    \pgf@circ@twoport@converter@ac{0.45}{-0.65}
    \pgf@circ@twoport@converter@ac{0.45}{-0.5}
    \pgf@circ@twoport@converter@ac{0.45}{-0.35}
}
%% single phase ac/dc converter
\pgfcirc@define@twoports{blocks}
{
    % these two are left for backward compatibiliyt
    \anchor{dc1}{\northeast\pgf@y=.4\pgf@y}
    \anchor{dc2}{\northeast\pgf@y=-.4\pgf@y}
    % better
    \anchor{ac up in}{\northeast\pgf@y=.4\pgf@y\pgf@x=-\pgf@x}
    \anchor{ac down in}{\northeast\pgf@y=-.4\pgf@y\pgf@x=-\pgf@x}
    \anchor{dc up out}{\northeast\pgf@y=.4\pgf@y}
    \anchor{dc down out}{\northeast\pgf@y=-.4\pgf@y}
}
{\ctikzvalof{bipoles/sacdc/width}}
{sacdc}
{\ctikzvalof{bipoles/sacdc/width}}
{\ctikzvalof{bipoles/sacdc/width}}
{
    \pgfcirc@twoport@draw@splitline
    \ifnum\@@rotation<145 % swap dc/ac for "backward" and "up" symbol
        \pgf@circ@twoport@converter@ac@up
        \pgf@circ@twoport@converter@dc@down
    \else
        \pgf@circ@twoport@converter@dc@up
        \pgf@circ@twoport@converter@ac@down
    \fi
}
%% dc/dc converter
\pgfcirc@define@twoports{blocks}
{
    % these two are left for backward compatibiliyt
    \anchor{dc1}{\northeast\pgf@y=.4\pgf@y\pgf@x=-\pgf@x}
    \anchor{dc2}{\northeast\pgf@y=-.4\pgf@y\pgf@x=-\pgf@x}
    % better
    \anchor{dc up in}{\northeast\pgf@y=.4\pgf@y\pgf@x=-\pgf@x}
    \anchor{dc down in}{\northeast\pgf@y=-.4\pgf@y\pgf@x=-\pgf@x}
    \anchor{dc up out}{\northeast\pgf@y=.4\pgf@y}
    \anchor{dc down out}{\northeast\pgf@y=-.4\pgf@y}
}
{\ctikzvalof{bipoles/sdcdc/width}}
{sdcdc}
{\ctikzvalof{bipoles/sdcdc/width}}
{\ctikzvalof{bipoles/sdcdc/width}}
{
    \pgfcirc@twoport@draw@splitline
    % No need to switch here
    \pgf@circ@twoport@converter@dc@up
    \pgf@circ@twoport@converter@dc@down
}
%% single phase dc/ac converter
\pgfcirc@define@twoports{blocks}
{
    % these two are left for backward compatibiliyt
    \anchor{dc1}{\northeast\pgf@y=.4\pgf@y\pgf@x=-\pgf@x}
    \anchor{dc2}{\northeast\pgf@y=-.4\pgf@y\pgf@x=-\pgf@x}
    % better
    \anchor{dc up in}{\northeast\pgf@y=.4\pgf@y\pgf@x=-\pgf@x}
    \anchor{dc down in}{\northeast\pgf@y=-.4\pgf@y\pgf@x=-\pgf@x}
    \anchor{ac up out}{\northeast\pgf@y=.4\pgf@y}
    \anchor{ac down out}{\northeast\pgf@y=-.4\pgf@y}
}
{\ctikzvalof{bipoles/sdcac/width}}
{sdcac}
{\ctikzvalof{bipoles/sdcac/width}}
{\ctikzvalof{bipoles/sdcac/width}}
{
    \pgfcirc@twoport@draw@splitline
    \ifnum\@@rotation<145 % swap dc/ac for "backward" and "up" symbol
        \pgf@circ@twoport@converter@dc@up
        \pgf@circ@twoport@converter@ac@down
    \else
        \pgf@circ@twoport@converter@ac@up
        \pgf@circ@twoport@converter@dc@down
    \fi
}
%% single phase ac/ac converter
\pgfcirc@define@twoports{blocks}
{
    \anchor{ac up in}{\northeast\pgf@y=.4\pgf@y\pgf@x=-\pgf@x}
    \anchor{ac down in}{\northeast\pgf@y=-.4\pgf@y\pgf@x=-\pgf@x}
    \anchor{ac up out}{\northeast\pgf@y=.4\pgf@y}
    \anchor{ac down out}{\northeast\pgf@y=-.4\pgf@y}
}
{\ctikzvalof{bipoles/sdcac/width}}
{sacac}
{\ctikzvalof{bipoles/sdcac/width}}
{\ctikzvalof{bipoles/sdcac/width}}
{
    \pgfcirc@twoport@draw@splitline
    \pgf@circ@twoport@converter@ac@up
    \pgf@circ@twoport@converter@ac@down
}
%% threephase ac/dc converter
\pgfcirc@define@twoports{blocks}
{
    % legacy, let for compatibility
    \anchor{dc1}{\northeast\pgf@y=.4\pgf@y}
    \anchor{dc2}{\northeast\pgf@y=-.4\pgf@y}
    \anchor{ac1}{\northeast\pgf@y=.6\pgf@y\pgf@x=-\pgf@x}
    \anchor{ac2}{\northeast\pgf@y=0\pgf@y\pgf@x=-\pgf@x}
    \anchor{ac3}{\northeast\pgf@y=-.6\pgf@y\pgf@x=-\pgf@x}
    %better
    \anchor{dc up out}{\northeast\pgf@y=.4\pgf@y}
    \anchor{dc down out}{\northeast\pgf@y=-.4\pgf@y}
    \anchor{ac up in}{\northeast\pgf@y=.6\pgf@y\pgf@x=-\pgf@x}
    \anchor{ac mid in}{\northeast\pgf@y=0\pgf@y\pgf@x=-\pgf@x}
    \anchor{ac down in}{\northeast\pgf@y=-.6\pgf@y\pgf@x=-\pgf@x}
}
{\ctikzvalof{bipoles/tacdc/width}}
{tacdc}
{\ctikzvalof{bipoles/tacdc/width}}
{\ctikzvalof{bipoles/tacdc/width}}
{
    \pgfcirc@twoport@draw@splitline
    \ifnum\@@rotation<145 % swap dc/ac for "backward" and "up" symbol
        \pgf@circ@twoport@converter@tac@up
        \pgf@circ@twoport@converter@dc@down
    \else
        \pgf@circ@twoport@converter@dc@up
        \pgf@circ@twoport@converter@tac@down
    \fi
}
%% threephase dc/ac converter
\pgfcirc@define@twoports{blocks}
{
    % legacy, let for compatibility
    \anchor{dc1}{\northeast\pgf@y=.4\pgf@y\pgf@x=-\pgf@x}
    \anchor{dc2}{\northeast\pgf@y=-.4\pgf@y\pgf@x=-\pgf@x}
    \anchor{ac1}{\northeast\pgf@y=.6\pgf@y}
    \anchor{ac2}{\northeast\pgf@y=0\pgf@y}
    \anchor{ac3}{\northeast\pgf@y=-.6\pgf@y}
    %better
    \anchor{dc up in}{\northeast\pgf@y=.4\pgf@y\pgf@x=-\pgf@x}
    \anchor{dc down in}{\northeast\pgf@y=-.4\pgf@y\pgf@x=-\pgf@x}
    \anchor{ac up out}{\northeast\pgf@y=.6\pgf@y}
    \anchor{ac mid out}{\northeast\pgf@y=0\pgf@y}
    \anchor{ac down out}{\northeast\pgf@y=-.6\pgf@y}
}
{\ctikzvalof{bipoles/tdcac/width}}
{tdcac}
{\ctikzvalof{bipoles/tdcac/width}}
{\ctikzvalof{bipoles/tdcac/width}}
{
    \pgfcirc@twoport@draw@splitline
    \ifnum\@@rotation<145 % swap dc/ac for "backward" and "up" symbol
        \pgf@circ@twoport@converter@dc@up
        \pgf@circ@twoport@converter@tac@down
    \else
        \pgf@circ@twoport@converter@tac@up
        \pgf@circ@twoport@converter@dc@down
    \fi
}
%% threephase ac/ac converter
\pgfcirc@define@twoports{blocks}
{
    \anchor{ac up in}{\northeast\pgf@y=.6\pgf@y\pgf@x=-\pgf@x}
    \anchor{ac mid in}{\northeast\pgf@y=0\pgf@y\pgf@x=-\pgf@x}
    \anchor{ac down in}{\northeast\pgf@y=-.6\pgf@y\pgf@x=-\pgf@x}
    \anchor{ac up out}{\northeast\pgf@y=.6\pgf@y}
    \anchor{ac mid out}{\northeast\pgf@y=0\pgf@y}
    \anchor{ac down out}{\northeast\pgf@y=-.6\pgf@y}
}
{\ctikzvalof{bipoles/tdcac/width}}
{tacac}
{\ctikzvalof{bipoles/tdcac/width}}
{\ctikzvalof{bipoles/tdcac/width}}
{
    \pgfcirc@twoport@draw@splitline
    \pgf@circ@twoport@converter@tac@down
    \pgf@circ@twoport@converter@tac@up
}
%%%% Non-square blocks. We do not use the standard macros
%%%% this one is adapted to do the boxed thing
%
\long\def\pgfcirc@define@twoports@boxed#1#2#3#4#5#6#7{
\pgfcircdeclarebipolescaled{#1}
    {
        \savedmacro{\componentisboxed}{\edef\componentisboxed{\ifpgf@circuit@boxed 1\else 0\fi}}
        \pgcirc@twoport@additional@anchors
        #2
    }
    {#3}
    {#4}
    {#5}
    {#6}
    {
    \pgf@circ@res@step=#6\pgf@circ@scaled@Rlen %6 is the real width parameter
    \pgfsetdash{}{0pt}	% always draw solid line for inner symbol
    \pgfsetarrows{-}
    \pgfcirc@twoport@maybedash
    % draw outer box
    \ifpgf@circuit@boxed
        \pgf@circ@setlinewidth{bipoles}{\pgfstartlinewidth}
        \pgfnode{blockbox}{center}{}{pgf@box}{\pgfusepath{draw}}
        \pgf@circ@draworfill
    \fi
    \pgf@circ@inputarrow
    \ifpgf@circuit@boxed
        \pgfsetlinewidth{\pgfstartlinewidth}
        % draw solid line for inner symbol if no box is drawn and not fully dashed
        \ifpgf@circuit@full@dashed\else\pgfsetdash{}{0pt}\fi
        \pgf@circ@res@step=.7\pgf@circ@res@step % scale amp symbol when inside a box
    \else
        \pgf@circ@setlinewidth{bipoles}{\pgfstartlinewidth}
    \fi
    #7
    }
}
%% voltage controled oscillator
\pgfcirc@define@twoports@boxed{blocks}
{}
{\ctikzvalof{bipoles/vco/width}}
{vco}
{\ctikzvalof{bipoles/twoport/width}}
{\ctikzvalof{bipoles/vco/width}}
{
    % ok, this is a bit of incoherence
    \divide \pgf@circ@res@step by 2
    % draw circle
    \pgfscope
        \pgf@circ@setlinewidth{bipoles}{\pgfstartlinewidth}
        \pgfpathcircle{\pgfpoint{0}{0}} {\pgf@circ@res@step}
        \pgf@circ@draworfill
    \endpgfscope
    \pfgcirc@twoport@rotate@inner@symbol
    \pgfcirc@twoport@draw@sine{0}{0}
}
%% amplifier, iamplifier, and vamplifier
%% Amplifier %% Beware, not using the generic twoport(s) macros.
\pgfcirc@define@twoports@boxed{blocks}
{
    \anchor{up}{%
        \northeast\pgf@x=0pt\relax
        \ifnum\componentisboxed=0
            \pgf@y=0.55\pgf@y
        \fi
    }
    \anchor{down}{%
        \northeast\pgf@x=0pt\pgf@y=-\pgf@y\relax
        \ifnum\componentisboxed=0
            \pgf@y=0.55\pgf@y
        \fi
    }
}
{\ifpgf@circuit@boxed\ctikzvalof{bipoles/twoport/width}\else\ctikzvalof{bipoles/amp/width}\fi}
{amp}
{\ifpgf@circuit@boxed\ctikzvalof{bipoles/twoport/width}\else\ctikzvalof{bipoles/amp/width}\fi}
{\ifpgf@circuit@boxed\ctikzvalof{bipoles/twoport/width}\else\ctikzvalof{bipoles/amp/width}\fi}
{
    % draw triangle
    \pgfpathmoveto{\pgfpoint{-0.5\pgf@circ@res@step}{0.55\pgf@circ@res@step}}
    \pgfpathlineto{\pgfpoint{0.5\pgf@circ@res@step}{0}}
    \pgfpathlineto{\pgfpoint{-0.5\pgf@circ@res@step}{-0.55\pgf@circ@res@step}}
    \pgfpathclose
    \pgf@circ@draworfill
    \pfgcirc@twoport@get@symbol@rotation
    % draw inner text
    \pgf@circ@text@strokecolor
    \ifnum\@@rotation=180
        \pgftransformrotate{180}
        \pgftext[center,x=0.12\pgf@circ@res@step,y=0]{\ctikzvalof{bipoles/twoport/text}}
    \else
        \pgftext[center,x=-0.12\pgf@circ@res@step,y=0]{\ctikzvalof{bipoles/twoport/text}}
    \fi
}
%% Instrumentation amplifier %% Beware, not using the generic twoport(s) macros.
\pgfcirc@define@twoports@boxed{blocks}
{
    \anchor{up}{%
        \northeast\pgf@x=0pt\relax
        \ifnum\componentisboxed=0
            \pgf@y=0.75\pgf@y
        \fi
    }
    \anchor{down}{%
        \northeast\pgf@x=0pt\pgf@y=-\pgf@y\relax
        \ifnum\componentisboxed=0
            \pgf@y=0.75\pgf@y
        \fi
    }
}
{\ifpgf@circuit@boxed\ctikzvalof{bipoles/twoport/width}\else\ctikzvalof{bipoles/amp/width}\fi}
{iamp}
{\ifpgf@circuit@boxed\ctikzvalof{bipoles/twoport/width}\else\ctikzvalof{bipoles/amp/width}\fi}
{\ifpgf@circuit@boxed\ctikzvalof{bipoles/twoport/width}\else\ctikzvalof{bipoles/amp/width}\fi}
{
    % draw blunt triangle
    \pgfpathmoveto{\pgfpoint{-0.5\pgf@circ@res@step}{0.55\pgf@circ@res@step}}
    \pgfpathlineto{\pgfpoint{0.5\pgf@circ@res@step}{0.2\pgf@circ@res@step}}
    \pgfpathlineto{\pgfpoint{0.5\pgf@circ@res@step}{-0.2\pgf@circ@res@step}}
    \pgfpathlineto{\pgfpoint{-0.5\pgf@circ@res@step}{-0.55\pgf@circ@res@step}}
    \pgfpathclose
    \pgf@circ@draworfill
    \pfgcirc@twoport@get@symbol@rotation
    % draw inner text
    \pgf@circ@text@strokecolor
    \ifnum\@@rotation=180
        \pgftransformrotate{180}
        \pgftext[center,x=0.12\pgf@circ@res@step,y=0]{\ctikzvalof{bipoles/twoport/text}}
    \else
        \pgftext[center,x=-0.12\pgf@circ@res@step,y=0]{\ctikzvalof{bipoles/twoport/text}}
    \fi
}
%% variable amplifier %% Beware, not using the generic twoport(s) macros.
\pgfcirc@define@twoports@boxed{blocks}
{
    \anchor{up}{%
        \northeast\pgf@x=0pt\relax
        \ifnum\componentisboxed=0
            \pgf@y=0.55\pgf@y
        \fi
    }
    \anchor{down}{%
        \northeast\pgf@x=0pt\pgf@y=-\pgf@y\relax
        \ifnum\componentisboxed=0
            \pgf@y=0.55\pgf@y
        \fi
    }
}
{\ifpgf@circuit@boxed\ctikzvalof{bipoles/twoport/width}\else\ctikzvalof{bipoles/amp/width}\fi}
{vamp}
{\ifpgf@circuit@boxed\ctikzvalof{bipoles/twoport/width}\else\ctikzvalof{bipoles/amp/width}\fi}
{\ifpgf@circuit@boxed\ctikzvalof{bipoles/twoport/width}\else\ctikzvalof{bipoles/amp/width}\fi}
{
    % draw triangle
    \pgfpathmoveto{\pgfpoint{-0.5\pgf@circ@res@step}{0.55\pgf@circ@res@step}}
    \pgfpathlineto{\pgfpoint{0.5\pgf@circ@res@step}{0}}
    \pgfpathlineto{\pgfpoint{-0.5\pgf@circ@res@step}{-0.55\pgf@circ@res@step}}
    \pgfpathclose
    \pgf@circ@draworfill
    \pfgcirc@twoport@get@symbol@rotation
    % draw arrow
    \pgfsetlinewidth{\pgfstartlinewidth}
    \pgfcirc@set@arrows{tunable}{}{latex}
    \pgfpathmoveto{\pgfpoint{-0.8\pgf@circ@res@step}{-0.5\pgf@circ@res@step}}
    \pgfpathlineto{\pgfpoint{0.6\pgf@circ@res@step}{0.6\pgf@circ@res@step}}
    \pgfusepath{draw}
    % draw inner text
    \pgf@circ@text@strokecolor
    \ifnum\@@rotation=180
        \pgftransformrotate{180}
        \pgftext[center,x=0.12\pgf@circ@res@step,y=0]{\ctikzvalof{bipoles/twoport/text}}
    \else
        \pgftext[center,x=-0.12\pgf@circ@res@step,y=0]{\ctikzvalof{bipoles/twoport/text}}
    \fi
}

%% optical fiber
\pgfcirc@define@twoports@norotate{blocks}
{}
{\ctikzvalof{bipoles/fiber/width}}
{fiber}
{\ctikzvalof{bipoles/fiber/width}}
{\ctikzvalof{bipoles/fiber/width}}
{
	\pgfpathcircle{\pgfpoint{0.2\pgf@circ@res@left}{0.4\pgf@circ@res@up}}{0.4\pgf@circ@res@up}
	\pgfpathcircle{\pgfpoint{0\pgf@circ@res@left}{0.4\pgf@circ@res@up}}{0.4\pgf@circ@res@up}
        \pgfpathcircle{\pgfpoint{-0.2\pgf@circ@res@left}{0.4\pgf@circ@res@up}}{0.4\pgf@circ@res@up}
	\pgfusepath{draw}
        % always use basic line width for this
        \pgfsetlinewidth{\pgfstartlinewidth}
        \pgfpathmoveto{\pgfpoint{\pgf@circ@res@left}{\pgf@circ@res@zero}}
        \pgfpathlineto{\pgfpoint{\pgf@circ@res@right}{\pgf@circ@res@zero}}
	\pgfusepath{draw}
}

\pgfcirc@activate@bipole@simple{l}{fiber}
%
% %>>>

%% Path definitions for Blocks%<<<

\pgfcirc@activate@bipole@simple{l}{twoport}
\pgfcirc@activate@bipole@simple{l}{twoportsplit}
\pgfcirc@activate@bipole@simple{l}{vco}
\pgfcirc@activate@bipole@simple{l}{bandpass}
\pgfcirc@activate@bipole@simple{l}{bandstop}
\pgfcirc@activate@bipole@simple{l}{highpass}
\pgfcirc@activate@bipole@simple{l}{highpass2}
\pgfcirc@activate@bipole@simple{l}{lowpass}
\pgfcirc@activate@bipole@simple{l}{lowpass2}
\pgfcirc@activate@bipole@simple{l}{allpass}
\pgfcirc@activate@bipole@simple{l}{adc}
\pgfcirc@activate@bipole@simple{l}{dac}
\pgfcirc@activate@bipole@simple{l}{dsp}
\pgfcirc@activate@bipole@simple{l}{fft}
\pgfcirc@activate@bipole@simple{l}{amp}
\pgfcirc@activate@bipole@simple{l}{iamp}
\pgfcirc@activate@bipole@simple{l}{vamp}
\pgfcirc@activate@bipole@simple{l}{piattenuator}
\pgfcirc@activate@bipole@simple{l}{vpiattenuator}
\pgfcirc@activate@bipole@simple{l}{tattenuator}
\pgfcirc@activate@bipole@simple{l}{vtattenuator}
\pgfcirc@activate@bipole@simple{l}{phaseshifter}
\pgfcirc@activate@bipole@simple{l}{vphaseshifter}
\pgfcirc@activate@bipole@simple{l}{detector}
\pgfcirc@activate@bipole@simple{l}{saturation}
\pgfcirc@activate@bipole@simple{l}{sigmoid}
\pgfcirc@activate@bipole@simple{l}{allornothing}
\pgfcirc@activate@bipole@simple{l}{fiber}
\pgfcirc@activate@bipole@simple{l}{sacdc}
\pgfcirc@activate@bipole@simple{l}{sdcac}
\pgfcirc@activate@bipole@simple{l}{sdcdc}
\pgfcirc@activate@bipole@simple{l}{sacac}
\pgfcirc@activate@bipole@simple{l}{tacdc}
\pgfcirc@activate@bipole@simple{l}{tdcac}
\pgfcirc@activate@bipole@simple{l}{tacac}
% %>>>

%% Node shapes for  Block elements %<<<
%
% utility macro for the anchors
\def\pgf@circ@circular@rf@anchors#1{%
    \savedanchor\northwest{
        \pgfmathsetlength{\pgf@circ@scaled@Rlen}{\ctikzvalof{\ctikzclass/scale}\pgf@circ@Rlen}
        \ifpgf@circuit@boxed
            \pgf@y=\ctikzvalof{bipoles/twoport/width}\pgf@circ@scaled@Rlen
            \pgf@y=.5\pgf@y
            \pgf@x=-\ctikzvalof{bipoles/twoport/width}\pgf@circ@scaled@Rlen
            \pgf@x=.5\pgf@x
        \else
            \pgf@y=\ctikzvalof{tripoles/#1/width}\pgf@circ@scaled@Rlen
            \pgf@y=.5\pgf@y
            \pgf@x=-\ctikzvalof{tripoles/#1/width}\pgf@circ@scaled@Rlen
            \pgf@x=.5\pgf@x
        \fi
    }
    % border anchors
    \anchorborder{
        \pgf@circ@res@left=\pgf@x
        \pgf@circ@res@up=\pgf@y
        \ifnum\componentisboxed=0
            \pgfpointborderellipse{\pgfpoint{\pgf@circ@res@left}{\pgf@circ@res@up}
            }{\pgfpoint{\ctikzvalof{tripoles/#1/width}*\scaledRlen/2}{\ctikzvalof{tripoles/#1/width}*\scaledRlen/2}}
        \else
            \pgfpointborderrectangle{\pgfpoint{\pgf@circ@res@left}{\pgf@circ@res@up}
            }{\pgfpoint{\ctikzvalof{tripoles/#1/width}*\scaledRlen/2}{\ctikzvalof{tripoles/#1/width}*\scaledRlen/2}}
        \fi
    }
    \pgfcirc@northwest@symmetric@geoanchors
    \anchor{geocenter}{\pgfpointorigin}
    \anchor{up}{\northwest\pgf@x=0pt}
    \anchor{down}{\northwest\pgf@x=0pt\pgf@y=-\pgf@y}
    % Deprecated number anchors
    \anchor{1}{\northwest\pgf@y=0pt}
    \anchor{2}{\northwest\pgf@y=-\pgf@y\pgf@x=0pt}
    \anchor{3}{\northwest\pgf@y=0pt\pgf@x=-\pgf@x}
    \anchor{4}{\northwest\pgf@y=\pgf@y\pgf@x=0pt}
    % input output anchors (also quite bad)
    \anchor{in 1}{\northwest\pgf@y=0pt}
    \anchor{in1}{\northwest\pgf@y=0pt}
    \anchor{in}{\northwest\pgf@y=0pt}
    \anchor{in 2}{\northwest\pgf@y=-\pgf@y\pgf@x=0pt}
    \anchor{in2}{\northwest\pgf@y=-\pgf@y\pgf@x=0pt}
    \anchor{out}{\northwest\pgf@y=0pt\pgf@x=-\pgf@x}
    \anchor{left down}{\northwest\pgf@y=-0.5\pgf@y}
    \anchor{right down}{\northwest\pgf@x=-\pgf@x\pgf@y=-0.5\pgf@y}
    \anchor{right up}{\northwest\pgf@x=-\pgf@x\pgf@y=0.5\pgf@y}
    \anchor{left up}{\northwest\pgf@y=0.5\pgf@y}
    \anchor{text}{\northwest
        \advance\pgf@y\dimexpr-.5\dp\pgfnodeparttextbox+.5\ht\pgfnodeparttextbox\relax
        \pgf@x=-.5\wd\pgfnodeparttextbox\relax}
}
% draw the body rectangle and circle if and when needed
\def\pgf@circ@circular@rf@box@circle{%
    \pgfstartlinewidth=\pgflinewidth
    % draw outer box
    \ifpgf@circuit@boxed
        \pgfnode{blockbox}{center}{}{pgf@box}{\pgfusepath{draw}}
    \fi
    % draw outer circle
    \ifpgf@circuit@boxed
        \pgf@circ@res@step=.7\pgf@circ@res@step
        % draw solid line for inner symbol if no box is drawn and not fully dashed
        \ifpgf@circuit@full@dashed\else\pgfsetdash{}{0pt}\fi
    \else
        \pgf@circ@setlinewidth{bipoles}{\pgfstartlinewidth}
    \fi
    \ifpgf@circuit@boxedcircled
        \pgfpathcircle{\pgfpoint{0}{0}} {0.5\pgf@circ@res@step}
    \fi
    \pgf@circ@draworfill
}
%
\pgfdeclareshape{mixer}
{
    \savedmacro{\ctikzclass}{\edef\ctikzclass{blocks}}
    \saveddimen{\scaledRlen}{\pgfmathsetlength{\pgf@x}{\ctikzvalof{\ctikzclass/scale}\pgf@circ@Rlen}}
    \savedmacro{\componentisboxed}{\edef\componentisboxed{\ifpgf@circuit@boxed 1\else 0\fi}}
    % build the anchor set
    \anchor{center}{\pgfpointorigin}
    \pgf@circ@circular@rf@anchors{mixer}
    \pgf@circ@draw@component{
        \pgf@circ@setcolor
        \pgf@circ@scaled@Rlen=\scaledRlen
        \pgf@circ@res@step=\ctikzvalof{tripoles/mixer/width}\pgf@circ@scaled@Rlen
        \pgfscope
            \pgf@circ@circular@rf@box@circle
            % draw inner stuff
            % draw solid line for inner symbol if no box is drawn and not fully dashed
            \ifpgf@circuit@full@dashed\else\pgfsetdash{}{0pt}\fi
            \pgfsetlinewidth{\pgfstartlinewidth}
            \pgfpathmoveto{\pgfpointorigin}
            \pgfpathmoveto{\pgfpointpolar{135}{0.5\pgf@circ@res@step}}
            \pgfpathlineto{\pgfpointpolar{-45}{0.5\pgf@circ@res@step}}
            \pgfpathmoveto{\pgfpointorigin}
            \pgfpathmoveto{\pgfpointpolar{45}{0.5\pgf@circ@res@step}}
            \pgfpathlineto{\pgfpointpolar{-135}{0.5\pgf@circ@res@step}}
            \pgfusepath{draw}
        \endpgfscope
    }
}

\pgfdeclareshape{adder}
{
    \savedmacro{\ctikzclass}{\edef\ctikzclass{blocks}}
    \saveddimen{\scaledRlen}{\pgfmathsetlength{\pgf@x}{\ctikzvalof{\ctikzclass/scale}\pgf@circ@Rlen}}
    \savedmacro{\componentisboxed}{\edef\componentisboxed{\ifpgf@circuit@boxed 1\else 0\fi}}
    % build the anchor set
    \anchor{center}{\pgfpointorigin}
    \pgf@circ@circular@rf@anchors{adder}
    \pgf@circ@draw@component{
        \pgf@circ@setcolor
        \pgf@circ@scaled@Rlen=\scaledRlen
        \pgf@circ@res@step=\ctikzvalof{tripoles/adder/width}\pgf@circ@scaled@Rlen
        \pgfscope
            \pgf@circ@circular@rf@box@circle
            % draw inner stuff
            % draw solid line for inner symbol if no box is drawn and not fully dashed
            \ifpgf@circuit@full@dashed\else\pgfsetdash{}{0pt}\fi
            \pgfsetlinewidth{\pgfstartlinewidth}
            \pgfpathmoveto{\pgfpointorigin}
            \pgfpathmoveto{\pgfpointpolar{0}{0.3\pgf@circ@res@step}}
            \pgfpathlineto{\pgfpointpolar{180}{0.3\pgf@circ@res@step}}
            \pgfpathmoveto{\pgfpointorigin}
            \pgfpathmoveto{\pgfpointpolar{90}{0.3\pgf@circ@res@step}}
            \pgfpathlineto{\pgfpointpolar{270}{0.3\pgf@circ@res@step}}
            \pgf@circ@setlinewidth{tripoles}{\pgflinewidth}
            \pgfusepath{draw}
        \endpgfscope
    }
}

\pgfdeclareshape{oscillator}
{
    \savedmacro{\ctikzclass}{\edef\ctikzclass{blocks}}
    \saveddimen{\scaledRlen}{\pgfmathsetlength{\pgf@x}{\ctikzvalof{\ctikzclass/scale}\pgf@circ@Rlen}}
    \savedmacro{\componentisboxed}{\edef\componentisboxed{\ifpgf@circuit@boxed 1\else 0\fi}}
    % build the anchor set --- the center of an oscillator is on the  right
    \anchor{center}{\northwest\pgf@y=0pt\pgf@x=-\pgf@x}
    \pgf@circ@circular@rf@anchors{oscillator}
    % border anchors
    \anchor{text}{
        \pgf@x=-2\pgf@x
        \advance \pgf@x by -.5\wd\pgfnodeparttextbox
        \advance \pgf@y by -1.5\ht\pgfnodeparttextbox
    }
    \pgf@circ@draw@component{
        \pgf@circ@setcolor
        \pgf@circ@scaled@Rlen=\scaledRlen
        \pgf@circ@res@step=\ctikzvalof{tripoles/oscillator/width}\pgf@circ@scaled@Rlen{}
        \pgfscope
            \pgf@circ@circular@rf@box@circle
            % draw inner sine waves
            % draw solid line for inner symbol if no box is drawn and not fully dashed
            \ifpgf@circuit@full@dashed\else\pgfsetdash{}{0pt}\fi
            \pgfsetlinewidth{\pgfstartlinewidth}
            \pgfsetcornersarced{\pgfpointorigin}% do not use rounded corners!
            \pgfpathmoveto{\pgfpoint{-0.3\pgf@circ@res@step}{0\pgf@circ@res@step}}
            \pgfpathsine{\pgfpoint{.15\pgf@circ@res@step}{.15\pgf@circ@res@step}}
            \pgfpathcosine{\pgfpoint{.15\pgf@circ@res@step}{-.15\pgf@circ@res@step}}
            \pgfpathsine{\pgfpoint{.15\pgf@circ@res@step}{-.15\pgf@circ@res@step}}
            \pgfpathcosine{\pgfpoint{.15\pgf@circ@res@step}{.15\pgf@circ@res@step}}
            \pgfusepath{draw}
        \endpgfscope
    }
}

\pgfdeclareshape{circulator}
{
    \savedmacro{\ctikzclass}{\edef\ctikzclass{blocks}}
    \saveddimen{\scaledRlen}{\pgfmathsetlength{\pgf@x}{\ctikzvalof{\ctikzclass/scale}\pgf@circ@Rlen}}
    \savedmacro{\componentisboxed}{\edef\componentisboxed{\ifpgf@circuit@boxed 1\else 0\fi}}
    % build the anchor set
    \anchor{center}{\pgfpointorigin}
    \pgf@circ@circular@rf@anchors{circulator}
    \pgf@circ@draw@component{
        \pgf@circ@setcolor
        \pgf@circ@scaled@Rlen=\scaledRlen
        \pgf@circ@res@step=\ctikzvalof{tripoles/circulator/width}\pgf@circ@scaled@Rlen
        \pgfscope
            \pgf@circ@circular@rf@box@circle
            % inner arrow
            % draw solid line for inner symbol if no box is drawn and not fully dashed
            \ifpgf@circuit@full@dashed\else\pgfsetdash{}{0pt}\fi
            \pgfsetlinewidth{\pgfstartlinewidth}
            \pgfsetarrowsend{latex}
            \pgfpathmoveto{\pgfpoint{-0.25\pgf@circ@res@step}{0}}
            \pgfpatharc{180}{-90} {0.25\pgf@circ@res@step}
            \pgfpathlineto{\pgfpoint{-5pt}{-0.2\pgf@circ@res@step}}
            \pgfusepath{draw}
            \endpgfscope
        }
}

%% gridnode
\pgfdeclareshape{gridnode}
{
    \savedmacro{\ctikzclass}{\edef\ctikzclass{blocks}}
    \saveddimen{\scaledRlen}{\pgfmathsetlength{\pgf@x}{\ctikzvalof{\ctikzclass/scale}\pgf@circ@Rlen}}
    \savedanchor\northwest{
        \pgfmathsetlength{\pgf@circ@scaled@Rlen}{\ctikzvalof{\ctikzclass/scale}\pgf@circ@Rlen}
            \pgf@y=\ctikzvalof{quadpoles/gridnode/width}\pgf@circ@scaled@Rlen
            \pgf@y=.5\pgf@y
            \pgf@x=-\ctikzvalof{quadpoles/gridnode/width}\pgf@circ@scaled@Rlen
            \pgf@x=.5\pgf@x
    }
    \pgfcirc@northwest@symmetric@geoanchors
    \anchor{center}{\pgfpointorigin}
    \anchor{up}{\northwest\pgf@x=0pt}
    \anchor{down}{\northwest\pgf@x=0pt\pgf@y=-\pgf@y}
    \anchor{right}{\northwest\pgf@y=0pt\pgf@x=-\pgf@x}
    \anchor{left}{\northwest\pgf@y=0pt}
    \anchor{left down}{\northwest\pgf@y=-0.5\pgf@y}
    \anchor{right down}{\northwest\pgf@x=-\pgf@x\pgf@y=-0.5\pgf@y}
    \anchor{right up}{\northwest\pgf@x=-\pgf@x\pgf@y=0.5\pgf@y}
    \anchor{left up}{\northwest\pgf@y=0.5\pgf@y}
    \anchor{text}{
        \pgf@x=-2\pgf@x
        \advance \pgf@x by -.5\wd\pgfnodeparttextbox
        \advance \pgf@y by -1.5\ht\pgfnodeparttextbox
    }
    \pgf@circ@draw@component{
        \pgf@circ@setcolor
        \pgf@circ@scaled@Rlen=\scaledRlen
        \pgf@circ@res@step=\ctikzvalof{quadpoles/gridnode/width}\pgf@circ@scaled@Rlen
        \northwest
        \pgf@circ@res@up = \pgf@y
        \pgf@circ@res@down = -\pgf@y
        \pgf@circ@res@right = -\pgf@x
        \pgf@circ@res@left = \pgf@x
        \pgf@circ@res@step = \ctikzvalof{quadpoles/gridnode/width}\pgf@circ@scaled@Rlen
        \divide \pgf@circ@res@step by 2
        \pgfpathmoveto{\pgfpoint{\pgf@circ@res@left}{\pgf@circ@res@zero}}
        \pgf@circ@res@other = \pgf@circ@res@left
        \advance\pgf@circ@res@other by \pgf@circ@res@step
        \pgfcirc@twoport@maybedash
        % draw outer box
        \pgf@circ@twoportbox
        \pgf@circ@inputarrow
        \pgfsetdash{}{0pt}	% always draw solid line for inner symbol
        \pgfsetarrows{-} %never draw arrows
        \pgfsetlinewidth{0.05mm}
        % draw grid
        \foreach \line in {-1,-.5,...,1}
        {
            \pgfpathmoveto{\pgfpoint{\line\pgf@circ@res@right}{\pgf@circ@res@up}}
            \pgfpathlineto{\pgfpoint{\pgf@circ@res@right}{\line\pgf@circ@res@up}}
            %
            \pgfpathmoveto{\pgfpoint{\line\pgf@circ@res@right}{\pgf@circ@res@up}}
            \pgfpathlineto{\pgfpoint{\pgf@circ@res@left}{\line\pgf@circ@res@down}}
        }
        %prevent from draw the inner cross twice
        \foreach \line in {-.5,0,...,.5}
        {
            \pgfpathmoveto{\pgfpoint{\line\pgf@circ@res@right}{\pgf@circ@res@down}}
            \pgfpathlineto{\pgfpoint{\pgf@circ@res@left}{\line\pgf@circ@res@up}}
            %
            \pgfpathmoveto{\pgfpoint{\line\pgf@circ@res@right}{\pgf@circ@res@down}}
            \pgfpathlineto{\pgfpoint{\pgf@circ@res@right}{\line\pgf@circ@res@down}}
        }
        \pgfusepath{draw}
    }
}


% Wilkinson divider
\pgfdeclareshape{wilkinson}{
    \savedmacro{\ctikzclass}{\edef\ctikzclass{blocks}}
    \saveddimen{\scaledRlen}{\pgfmathsetlength{\pgf@x}{\ctikzvalof{\ctikzclass/scale}\pgf@circ@Rlen}}
    \savedanchor\northwest{%
        \pgfmathsetlength{\pgf@circ@scaled@Rlen}{\ctikzvalof{\ctikzclass/scale}\pgf@circ@Rlen}
        \pgf@y=\ctikzvalof{tripoles/wilkinson/height}\pgf@circ@scaled@Rlen
        \pgf@y=.5\pgf@y
        \pgf@x= \pgf@circ@scaled@Rlen
        \pgf@x=.5\pgf@x
        \pgf@x=-\ctikzvalof{tripoles/wilkinson/width}\pgf@x
    }
    \pgfcirc@northwest@symmetric@geoanchors
    \anchor{up}{\northwest\pgf@x=0pt}
    \anchor{down}{\northwest\pgf@x=0pt\pgf@y=-\pgf@y}
    \anchor{right}{\northwest\pgf@y=0pt\pgf@x=-\pgf@x}
    \anchor{left}{\northwest\pgf@y=0pt}
    \anchor{center}{\pgfpointorigin}
    \anchor{in}{\northwest\pgf@y=0pt}
    \anchor{out1}{\northwest\pgf@x=-\pgf@x\pgf@y=-0.5\pgf@y}
    \anchor{out2}{\northwest\pgf@x=-\pgf@x\pgf@y=0.5\pgf@y}
    \anchor{left down}{\northwest\pgf@y=-0.5\pgf@y}
    \anchor{right down}{\northwest\pgf@x=-\pgf@x\pgf@y=-0.5\pgf@y}
    \anchor{right up}{\northwest\pgf@x=-\pgf@x\pgf@y=0.5\pgf@y}
    \anchor{left up}{\northwest\pgf@y=0.5\pgf@y}
    \anchor{text}{
        \northwest
        \advance \pgf@y by 0.5\ht\pgfnodeparttextbox
        \pgf@x=-.5\wd\pgfnodeparttextbox
    }
    \pgf@circ@draw@component{
        \pgf@circ@setcolor
        \pgf@circ@scaled@Rlen=\scaledRlen
        %
        \northwest
        \pgf@circ@res@up = \pgf@y
        \pgf@circ@res@down = -\pgf@y
        \pgf@circ@res@right = -\pgf@x
        \pgf@circ@res@left = \pgf@x
        %
        \pgfstartlinewidth=\pgflinewidth
        % draw outer box
        \pgf@circ@twoportbox
        \pgf@circ@inputarrow
        % draw inner stuff
        \pgfsetdash{}{0pt}	% always draw solid line for inner symbol
        \pgfsetarrows{-} %never draw arrows
        \pgfsetlinewidth{\pgfstartlinewidth}
        \pgfpathmoveto{\pgfpoint{\pgf@circ@res@left}{0pt}}
        \pgfpathlineto{\pgfpoint{0.5\pgf@circ@res@left}{0pt}}
        \pgfpathmoveto{\pgfpoint{\pgf@circ@res@right}{0.5\pgf@circ@res@up}}
        \pgfpathlineto{\pgfpoint{0.5\pgf@circ@res@right}{0.5\pgf@circ@res@up}}
        \pgfpathlineto{\pgfpoint{0.5\pgf@circ@res@left}{0pt}}
        \pgfpathlineto{\pgfpoint{0.5\pgf@circ@res@right}{0.5\pgf@circ@res@down}}
        \pgfpathlineto{\pgfpoint{\pgf@circ@res@right}{0.5\pgf@circ@res@down}}
        \pgfusepath{draw}
        \pgfsetdash{}{0pt}	% always draw solid line for inner symbol
        % draw inner resisitor - european or american style is recognised
        {
            \pgftransformshift{\pgfpoint{0.5\pgf@circ@res@right}{0pt}}
            \pgftransformrotate{90}
            % calculate size of resistor
            \ifpgf@circuit@europeanresistor
                \pgfmathparse{\pgf@circ@res@up / \pgf@circ@scaled@Rlen / \ctikzvalof{bipoles/generic/width} / 2}
                \pgftransformscale{\pgfmathresult}
                \pgfnode{genericshape}{center}{}{wilk@int@R}{\pgfusepath{fill}}
            \else
                \pgfmathparse{\pgf@circ@res@up / \pgf@circ@scaled@Rlen / \ctikzvalof{bipoles/resistor/width} / 2}
                \pgftransformscale{\pgfmathresult}
                \pgfnode{resistorshape}{center}{}{wilk@int@R}{\pgfusepath{fill}}
            \fi
        }
        \pgfpathmoveto{\pgfpoint{0.5\pgf@circ@res@right}{0.5\pgf@circ@res@up}}
        \pgfpathlineto{\pgfpointanchor{wilk@int@R}{right}}
        \pgfpathmoveto{\pgfpointanchor{wilk@int@R}{left}}
        \pgfpathlineto{\pgfpoint{0.5\pgf@circ@res@right}{0.5\pgf@circ@res@down}}
        \pgfusepath{draw}
    }
}

%% resistive splitter
\pgfdeclareshape{splitter}{
    \savedmacro{\ctikzclass}{\edef\ctikzclass{blocks}}
    \saveddimen{\scaledRlen}{\pgfmathsetlength{\pgf@x}{\ctikzvalof{\ctikzclass/scale}\pgf@circ@Rlen}}
    \savedanchor\northwest{%
        \pgfmathsetlength{\pgf@circ@scaled@Rlen}{\ctikzvalof{\ctikzclass/scale}\pgf@circ@Rlen}
        \pgf@y=\ctikzvalof{tripoles/splitter/height}\pgf@circ@scaled@Rlen
        \pgf@y=.5\pgf@y
        \pgf@x= \pgf@circ@scaled@Rlen
        \pgf@x=.5\pgf@x
        \pgf@x=-\ctikzvalof{tripoles/splitter/width}\pgf@x
    }
    \pgfcirc@northwest@symmetric@geoanchors
    \anchor{center}{\pgfpointorigin}
    \anchor{up}{\northwest\pgf@x=0pt}
    \anchor{down}{\northwest\pgf@x=0pt\pgf@y=-\pgf@y}
    \anchor{right}{\northwest\pgf@y=0pt\pgf@x=-\pgf@x}
    \anchor{left}{\northwest\pgf@y=0pt}
    \anchor{in}{\northwest\pgf@y=0pt}
    \anchor{out1}{\northwest\pgf@x=-\pgf@x\pgf@y=-0.5\pgf@y}
    \anchor{out2}{\northwest\pgf@x=-\pgf@x\pgf@y=0.5\pgf@y}
    \anchor{left down}{\northwest\pgf@y=-0.5\pgf@y}
    \anchor{right down}{\northwest\pgf@x=-\pgf@x\pgf@y=-0.5\pgf@y}
    \anchor{right up}{\northwest\pgf@x=-\pgf@x\pgf@y=0.5\pgf@y}
    \anchor{left up}{\northwest\pgf@y=0.5\pgf@y}
    \anchor{text}{
        \northwest
        \advance \pgf@y by 0.5\ht\pgfnodeparttextbox
        \pgf@x=-.5\wd\pgfnodeparttextbox
    }
    \pgf@circ@draw@component{
        \pgf@circ@setcolor
        \pgf@circ@scaled@Rlen=\scaledRlen
        %
        \northwest
        \pgf@circ@res@up = \pgf@y
        \pgf@circ@res@down = -\pgf@y
        \pgf@circ@res@right = -\pgf@x
        \pgf@circ@res@left = \pgf@x
        %
        \pgfstartlinewidth=\pgflinewidth
        % draw outer box
        \pgf@circ@twoportbox
        \pgf@circ@inputarrow
        % draw inner stuff
        \pgfsetdash{}{0pt}	% always draw solid line for inner symbol
        \pgfsetarrows{-} %never draw arrows
        \pgfsetlinewidth{\pgfstartlinewidth}
        \pgfpathmoveto{\pgfpoint{\pgf@circ@res@left}{0pt}}
        \pgfpathlineto{\pgfpoint{0.5\pgf@circ@res@left}{0pt}}
        \pgfpathmoveto{\pgfpoint{\pgf@circ@res@right}{0.5\pgf@circ@res@up}}
        \pgfpathlineto{\pgfpoint{0.5\pgf@circ@res@right}{0.5\pgf@circ@res@up}}
        \pgfpathmoveto{\pgfpoint{0.5\pgf@circ@res@left}{0pt}}
        \pgfpathmoveto{\pgfpoint{0.5\pgf@circ@res@right}{0.5\pgf@circ@res@down}}
        \pgfpathlineto{\pgfpoint{\pgf@circ@res@right}{0.5\pgf@circ@res@down}}
        \pgfusepath{draw}
        %
        \pgfsetdash{}{0pt}	% always draw solid line for inner symbol
        % draw inner resisitors - european or american style is recognised
        \foreach \respt/\resang/\linepta/\lineptb in %
        { \pgfpoint{0.5\pgf@circ@res@right}{0pt}/90/%
            \pgfpoint{0.5\pgf@circ@res@right}{0.5\pgf@circ@res@up}/\pgfpoint{0.5\pgf@circ@res@right}{0.5\pgf@circ@res@down},%
          \pgfpoint{0}{0.25\pgf@circ@res@up}/25/%
            \pgfpoint{0.5\pgf@circ@res@right}{0.5\pgf@circ@res@up}/\pgfpoint{0.5\pgf@circ@res@left}{0},%
          \pgfpoint{0}{0.25\pgf@circ@res@down}/-25/%
            \pgfpoint{0.5\pgf@circ@res@right}{0.5\pgf@circ@res@down}/\pgfpoint{0.5\pgf@circ@res@left}{0}}
        {
            {
                \pgftransformshift{\respt}
                \pgftransformrotate{\resang}
                % calculate size of resistor
                \ifpgf@circuit@europeanresistor
                    \pgfmathparse{\pgf@circ@res@up / \pgf@circ@scaled@Rlen / \ctikzvalof{bipoles/generic/width} / 2}
                    \pgftransformscale{\pgfmathresult}
                    \pgfnode{genericshape}{center}{}{wilk@int@R}{\pgfusepath{fill}}
                \else
                    \pgfmathparse{\pgf@circ@res@up / \pgf@circ@scaled@Rlen / \ctikzvalof{bipoles/resistor/width} / 2}
                    \pgftransformscale{\pgfmathresult}
                    \pgfnode{resistorshape}{center}{}{wilk@int@R}{\pgfusepath{fill}}
                \fi
            }
            \pgfpathmoveto{\linepta}
            \pgfpathlineto{\pgfpointanchor{wilk@int@R}{right}}
            \pgfpathmoveto{\pgfpointanchor{wilk@int@R}{left}}
            \pgfpathlineto{\lineptb}
            \pgfusepath{draw}
        }
    }
}

%% generic splitter
\pgfdeclareshape{genericsplitter}{
    \savedmacro{\ctikzclass}{\edef\ctikzclass{blocks}}
    \saveddimen{\scaledRlen}{\pgfmathsetlength{\pgf@x}{\ctikzvalof{\ctikzclass/scale}\pgf@circ@Rlen}}
    \savedanchor\northwest{%
        \pgfmathsetlength{\pgf@circ@scaled@Rlen}{\ctikzvalof{\ctikzclass/scale}\pgf@circ@Rlen}
        \pgf@y=\ctikzvalof{tripoles/genericsplitter/height}\pgf@circ@scaled@Rlen
        \pgf@y=.5\pgf@y
        \pgf@x= \pgf@circ@scaled@Rlen
        \pgf@x=.5\pgf@x
        \pgf@x=-\ctikzvalof{tripoles/genericsplitter/width}\pgf@x
    }
    \pgfcirc@northwest@symmetric@geoanchors
    \anchor{center}{\pgfpointorigin}
    \anchor{up}{\northwest\pgf@x=0pt}
    \anchor{down}{\northwest\pgf@x=0pt\pgf@y=-\pgf@y}
    \anchor{right}{\northwest\pgf@y=0pt\pgf@x=-\pgf@x}
    \anchor{left}{\northwest\pgf@y=0pt}
    \anchor{in}{\northwest\pgf@y=0pt}
    \anchor{out1}{\northwest\pgf@x=-\pgf@x\pgf@y=-0.5\pgf@y}
    \anchor{out2}{\northwest\pgf@x=-\pgf@x\pgf@y=0.5\pgf@y}
    \anchor{left down}{\northwest\pgf@y=-0.5\pgf@y}
    \anchor{right down}{\northwest\pgf@x=-\pgf@x\pgf@y=-0.5\pgf@y}
    \anchor{right up}{\northwest\pgf@x=-\pgf@x\pgf@y=0.5\pgf@y}
    \anchor{left up}{\northwest\pgf@y=0.5\pgf@y}
    \anchor{text}{
        \northwest
        \pgf@y=-.5\ht\pgfnodeparttextbox
        \pgf@x=-.2\wd\pgfnodeparttextbox
    }
    \pgf@circ@draw@component{
        \pgf@circ@setcolor
        \pgf@circ@scaled@Rlen=\scaledRlen
        %
        \northwest
        \pgf@circ@res@up = \pgf@y
        \pgf@circ@res@down = -\pgf@y
        \pgf@circ@res@right = -\pgf@x
        \pgf@circ@res@left = \pgf@x
        %
        \pgfstartlinewidth=\pgflinewidth
        % draw outer box
        \pgf@circ@twoportbox
        \pgf@circ@inputarrow
        % draw inner stuff
        \pgfsetdash{}{0pt}	% always draw solid line for inner symbol
        \pgfsetarrows{-} %never draw arrows
        \pgfsetlinewidth{\pgfstartlinewidth}
        \pgfpathmoveto{\pgfpoint{\pgf@circ@res@left}{0pt}}
        \pgfpathlineto{\pgfpoint{0.5\pgf@circ@res@left}{0pt}}
        \pgfpathmoveto{\pgfpoint{\pgf@circ@res@right}{0.5\pgf@circ@res@up}}
        \pgfpathlineto{\pgfpoint{0.5\pgf@circ@res@right}{0.5\pgf@circ@res@up}}
        \pgfpathmoveto{\pgfpoint{0.5\pgf@circ@res@left}{0pt}}
        \pgfpathmoveto{\pgfpoint{0.5\pgf@circ@res@right}{0.5\pgf@circ@res@down}}
        \pgfpathlineto{\pgfpoint{\pgf@circ@res@right}{0.5\pgf@circ@res@down}}
        \pgfusepath{draw}
        %
        \pgfsetdash{}{0pt}	% always draw solid line for inner symbol
        % draw inner resisitors - european or american style is recognised
        \foreach \linepta/\lineptb in %
        { \pgfpoint{0.5\pgf@circ@res@right}{0.5\pgf@circ@res@up}/\pgfpoint{0.5\pgf@circ@res@left}{0},%
          \pgfpoint{0.5\pgf@circ@res@right}{0.5\pgf@circ@res@down}/\pgfpoint{0.5\pgf@circ@res@left}{0}}
        {
            \pgfpathmoveto{\linepta}
            \pgfpathlineto{\lineptb}
            \pgfusepath{draw}
        }
    }
}

%% couplers generics
\long\def\pgfcircdeclarefourport#1#2{
    \pgfdeclareshape{#1}{
        \savedmacro{\ctikzclass}{\edef\ctikzclass{blocks}}
        \saveddimen{\scaledRlen}{\pgfmathsetlength{\pgf@x}{\ctikzvalof{\ctikzclass/scale}\pgf@circ@Rlen}}
        \savedanchor\northwest{%
            \pgfmathsetlength{\pgf@circ@scaled@Rlen}{\ctikzvalof{\ctikzclass/scale}\pgf@circ@Rlen}
            \pgf@y=\ctikzvalof{quadpoles/#1/height}\pgf@circ@scaled@Rlen
            \pgf@y=.5\pgf@y
            \pgf@x=.5\pgf@circ@scaled@Rlen
            \pgf@x=-\ctikzvalof{quadpoles/#1/width}\pgf@x
        }
        \pgfcirc@northwest@symmetric@geoanchors
        \anchor{center}{\pgfpointorigin}
        \anchor{up}{\northwest\pgf@x=0pt}
        \anchor{down}{\northwest\pgf@x=0pt\pgf@y=-\pgf@y}
        \anchor{right}{\northwest\pgf@y=0pt\pgf@x=-\pgf@x}
        \anchor{left}{\northwest\pgf@y=0pt}
        \anchor{port1}{\northwest\pgf@y=-0.5\pgf@y}
        \anchor{port2}{\northwest\pgf@x=-\pgf@x\pgf@y=-0.5\pgf@y}
        \anchor{port3}{\northwest\pgf@x=-\pgf@x\pgf@y=0.5\pgf@y}
        \anchor{port4}{\northwest\pgf@y=0.5\pgf@y}
        \anchor{left down}{\northwest\pgf@y=-0.5\pgf@y}
        \anchor{right down}{\northwest\pgf@x=-\pgf@x\pgf@y=-0.5\pgf@y}
        \anchor{right up}{\northwest\pgf@x=-\pgf@x\pgf@y=0.5\pgf@y}
        \anchor{left up}{\northwest\pgf@y=0.5\pgf@y}
        %1,2,3,4 are deprecated
        \anchor{1}{\northwest\pgf@y=-0.5\pgf@y}
        \anchor{2}{\northwest\pgf@x=-\pgf@x\pgf@y=-0.5\pgf@y}
        \anchor{3}{\northwest\pgf@x=-\pgf@x\pgf@y=0.5\pgf@y}
        \anchor{4}{\northwest\pgf@y=0.5\pgf@y}
        \anchor{text}{
            \northwest
            \advance \pgf@y by 0.5\ht\pgfnodeparttextbox
            \pgf@x=-.5\wd\pgfnodeparttextbox
        }
        \pgf@circ@draw@component{
            \pgf@circ@setcolor
            \northwest
            \pgf@circ@res@up = \pgf@y
            \pgf@circ@res@down = -\pgf@y
            \pgf@circ@res@right = -\pgf@x
            \pgf@circ@res@left = \pgf@x
            \pgf@circ@scaled@Rlen=\scaledRlen
            %
            \pgfstartlinewidth=\pgflinewidth
            % draw outer box
            \pgf@circ@setlinewidth{bipoles}{\pgfstartlinewidth}
            \pgfpathrectanglecorners{\pgfpoint{\pgf@circ@res@left}{\pgf@circ@res@up}}{\pgfpoint{\pgf@circ@res@right}{\pgf@circ@res@down}}
            \pgf@circ@draworfill
            % draw inner stuff
            #2%
            % draw inner text
            \pgf@circ@text@strokecolor
            \pgftext[center,x=-0.15\pgf@circ@res@step,y=0]{\ctikzvalof{bipoles/twoport/text}}
        }
    }
}

% four-port
\pgfcircdeclarefourport{fourport}{}

% straight coupler
\pgfcircdeclarefourport{coupler}{
    \pgfsetlinewidth{\pgfstartlinewidth}
    \pgfpathmoveto{\pgfpoint{\pgf@circ@res@left}{0.5\pgf@circ@res@up}}
    \pgfpathlineto{\pgfpoint{\pgf@circ@res@right}{0.5\pgf@circ@res@up}}
    \pgfpathmoveto{\pgfpoint{\pgf@circ@res@left}{0.5\pgf@circ@res@down}}
    \pgfpathlineto{\pgfpoint{\pgf@circ@res@right}{0.5\pgf@circ@res@down}}
    \pgfusepath{draw}

    \pgfpathmoveto{\pgfpoint{0.7\pgf@circ@res@left}{0.4\pgf@circ@res@down}}
    \pgfpathlineto{\pgfpoint{0.7\pgf@circ@res@right}{0.4\pgf@circ@res@up}}
    \pgfsetarrows{latex-latex}
    \pgfusepath{draw}
    \pgfpathmoveto{\pgfpoint{0.7\pgf@circ@res@left}{0.4\pgf@circ@res@up}}
    \pgfpathlineto{\pgfpoint{0.7\pgf@circ@res@right}{0.4\pgf@circ@res@down}}
    \pgfsetarrows{latex-latex}
    \pgfusepath{draw}
}

% "bended" coupler
\pgfcircdeclarefourport{coupler2}{
    \pgfsetlinewidth{\pgfstartlinewidth}
    \pgfpathmoveto{\pgfpoint{\pgf@circ@res@left}{0.5\pgf@circ@res@up}}
    \pgfpathlineto{\pgfpoint{\pgf@circ@res@right}{0.5\pgf@circ@res@up}}
    \pgfpathmoveto{\pgfpoint{\pgf@circ@res@left}{0.5\pgf@circ@res@down}}
    \pgfpathlineto{\pgfpoint{\pgf@circ@res@right}{0.5\pgf@circ@res@down}}
    \pgfusepath{draw}

    \pgfscope
        \pgfpathmoveto{\pgfpoint{0.1\pgf@circ@res@left}{0pt}}
        \pgfpatharc{0}{90} {0.4\pgf@circ@res@up}
        \pgfsetarrowsend{latex}
        \pgfusepath{draw}
    \endpgfscope
    \pgfscope
        \pgfpathmoveto{\pgfpoint{0.1\pgf@circ@res@left}{0pt}}
        \pgfpatharc{0}{-90} {0.4\pgf@circ@res@up}
        \pgfsetarrowsend{latex}
        \pgfusepath{draw}
    \endpgfscope
    \pgfscope
        \pgfpathmoveto{\pgfpoint{0.1\pgf@circ@res@right}{0pt}}
        \pgfpatharc{180}{90} {0.4\pgf@circ@res@up}
        \pgfsetarrowsend{latex}
        \pgfusepath{draw}
    \endpgfscope
    \pgfscope
        \pgfpathmoveto{\pgfpoint{0.1\pgf@circ@res@right}{0pt}}
        \pgfpatharc{-180}{-90} {0.4\pgf@circ@res@up}
        \pgfsetarrowsend{latex}
        \pgfusepath{draw}
    \endpgfscope
}

% mach zehnder modulator
\pgfdeclareshape{mzm}{
    \savedmacro{\ctikzclass}{\edef\ctikzclass{blocks}}
    \saveddimen{\scaledRlen}{\pgfmathsetlength{\pgf@x}{\ctikzvalof{\ctikzclass/scale}\pgf@circ@Rlen}}
    \savedanchor\northwest{%
        \pgfmathsetlength{\pgf@circ@scaled@Rlen}{\ctikzvalof{\ctikzclass/scale}\pgf@circ@Rlen}
        \pgf@y=\ctikzvalof{tripoles/mzm/height}\pgf@circ@scaled@Rlen
        \pgf@y=.5\pgf@y
        \pgf@x= \pgf@circ@scaled@Rlen
        \pgf@x=.5\pgf@x
        \pgf@x=-\ctikzvalof{tripoles/mzm/width}\pgf@x
    }
    \pgfcirc@northwest@symmetric@geoanchors
    \anchor{center}{\pgfpointorigin}
    \anchor{in}{ \northwest \pgf@y=0pt }
    \anchor{mod}{ \northwest \pgf@x=0pt }
    \anchor{out}{ \northwest \pgf@x=-\pgf@x \pgf@y=0pt }
    \anchor{text}{
        \northwest
        \advance \pgf@y by 0.5\ht\pgfnodeparttextbox
        \pgf@x=-.5\wd\pgfnodeparttextbox
    }
    \pgf@circ@draw@component{
        \pgf@circ@setcolor
        \pgf@circ@scaled@Rlen=\scaledRlen
        \northwest
        \pgf@circ@res@up = \pgf@y
        \pgf@circ@res@down = -\pgf@y
        \pgf@circ@res@right = -\pgf@x
        \pgf@circ@res@left = \pgf@x
        \pgfstartlinewidth=\pgflinewidth
        % draw outer box
        \pgf@circ@twoportbox
        \pgf@circ@inputarrow
        % draw inner stuff
        \pfgcirc@twoport@rotate@inner@symbol
        % draw inner symbol
        \ifpgf@circuit@full@dashed\else\pgfsetdash{}{0pt}\fi
        \pgfsetarrows{-} %never draw arrows
        \pgfsetlinewidth{\pgfstartlinewidth}
        \pgfpathmoveto{\pgfpoint{\pgf@circ@res@left}{\pgf@circ@res@zero}}
        \pgfpathlineto{\pgfpoint{0.75\pgf@circ@res@left}{\pgf@circ@res@zero}}
        %
        \pgfpathmoveto{\pgfpoint{0.75\pgf@circ@res@left}{\pgf@circ@res@zero}}
        \pgfpathlineto{\pgfpoint{0.5\pgf@circ@res@left}{0.25\pgf@circ@res@up}}
        %
        \pgfpathmoveto{\pgfpoint{0.75\pgf@circ@res@left}{\pgf@circ@res@zero}}
        \pgfpathlineto{\pgfpoint{0.5\pgf@circ@res@left}{0.25\pgf@circ@res@down}}
        %
        \pgfpathmoveto{\pgfpoint{\pgf@circ@res@right}{\pgf@circ@res@zero}}
        \pgfpathlineto{\pgfpoint{0.75\pgf@circ@res@right}{\pgf@circ@res@zero}}
        %
        \pgfpathmoveto{\pgfpoint{0.75\pgf@circ@res@right}{\pgf@circ@res@zero}}
        \pgfpathlineto{\pgfpoint{0.5\pgf@circ@res@right}{0.25\pgf@circ@res@up}}
        %
        \pgfpathmoveto{\pgfpoint{0.75\pgf@circ@res@right}{\pgf@circ@res@zero}}
        \pgfpathlineto{\pgfpoint{0.5\pgf@circ@res@right}{0.25\pgf@circ@res@down}}
        %
        \pgfpathmoveto{\pgfpoint{0.5\pgf@circ@res@right}{0.25\pgf@circ@res@up}}
        \pgfpathlineto{\pgfpoint{0.5\pgf@circ@res@left}{0.25\pgf@circ@res@up}}
        %
        \pgfpathmoveto{\pgfpoint{0.5\pgf@circ@res@right}{0.25\pgf@circ@res@down}}
        \pgfpathlineto{\pgfpoint{0.5\pgf@circ@res@left}{0.25\pgf@circ@res@down}}
        %
        \pgfpathmoveto{\pgfpoint{\pgf@circ@res@zero}{\pgf@circ@res@up}}
        \pgfpathlineto{\pgfpoint{\pgf@circ@res@zero}{0.35\pgf@circ@res@up}}
        \pgfpathlineto{\pgfpoint{0.25\pgf@circ@res@right}{0.1\pgf@circ@res@up}}
        \pgfusepath{draw}
        }
}
% %>>>

% vim: set fdm=marker fmr=%<<<,%>>>: