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I'm trying to draw a multiple emitter npn transistor and multiple collector pnp transistor. I'm using tikz to draw all my electric circuits but there is nothing about it in the documentation nor this site.
I need to draw something like Q1 in this image:
Revised solution moved E2 to the right of E. Also corrected compass anchors to reflect larger size than all the other transistors. B,C,E are still aligned with the center anchor.
\documentclass[border=1pt]{standalone}
\usepackage{circuitikz}
\makeatletter
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% two emitter npn %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\ctikzset{tripoles/npn2/height/.initial=1.1}% before expansion
\ctikzset{tripoles/npn2/width/.initial=.6}% before expansion
\ctikzset{tripoles/npn2/gate height/.initial=.45}
\ctikzset{tripoles/npn2/gate height 2/.initial=.15}
\ctikzset{tripoles/npn2/base height/.initial=.4}
\ctikzset{tripoles/npn2/step/.initial=.15}% both vertical and horizontal separation
\ctikzset{tripoles/npn2/slope/.initial=.6}% (height - height 2) / (gate width)
\ctikzset{tripoles/npn2/gate width/.initial=.5}
\ctikzset{tripoles/npn2/curr direction/.initial=1}
\pgfcircdeclaretransistor{npn2}{
\savedanchor{\southeast}{% \northeast is actually north (x=0pt)
\pgf@x=\pgfkeysvalueof{/tikz/circuitikz/tripoles/npn2/step}\pgf@circ@Rlen
\pgf@y=\pgfkeysvalueof{/tikz/circuitikz/tripoles/npn2/height}\pgf@circ@Rlen
\pgf@y=-.5\pgf@y
\advance\pgf@y by -\pgf@x
}
% redefine anchors for larger size
\anchor{north east}{
\southeast
\pgf@circ@res@temp=\pgf@x
\northeast
\pgf@x=\pgf@circ@res@temp
}
\anchor{south east}{\southeast}
\anchor{east}{
\southeast
\pgf@y=0pt
}
\anchor{south}{
\southeast
\pgf@x=0pt
}
\anchor{south west}{
\southeast
\pgf@circ@res@temp=\pgf@y
\left
\pgf@y=\pgf@circ@res@temp
}
\anchor{text}{
\northeast
\pgfpoint{.333em}{0.6\pgf@y}
}
\anchor{C}{\northeast}
\anchor{collector}{\northeast}
\anchor{B}{\left}
\anchor{base}{\left}
\anchor{E}{
\southeast
\pgf@x=-0pt
}
\anchor{emitter}{
\southeast
\pgf@x=-0pt
}
\anchor{E2}{\southeast}
}{%
\southeast
\pgf@circ@res@right=\pgf@x
\pgf@circ@res@down=\pgf@y
\pgf@circ@res@step=\pgf@circ@res@right
\pgfpathmoveto{\pgfpoint{0pt}{\pgf@circ@res@up}}
\pgfpathlineto{\pgfpoint{0pt}
{\pgfkeysvalueof{/tikz/circuitikz/tripoles/npn2/gate height}\pgf@circ@res@up}}
\pgfpathlineto{\pgfpoint
{\pgfkeysvalueof{/tikz/circuitikz/tripoles/npn2/gate width}\pgf@circ@res@left}
{\pgfkeysvalueof{/tikz/circuitikz/tripoles/npn2/gate height 2}\pgf@circ@res@up}}
\pgfusepath{draw}
\pgfscope
\pgf@circ@res@temp=\pgfkeysvalueof{/tikz/circuitikz/tripoles/npn2/base height}\pgf@circ@res@up
\pgfpathmoveto{\pgfpoint
{\pgfkeysvalueof{/tikz/circuitikz/tripoles/npn2/gate width}\pgf@circ@res@left}
{\pgf@circ@res@temp}}
\advance\pgf@circ@res@temp by \pgf@circ@res@step
\pgfpathlineto{\pgfpoint
{\pgfkeysvalueof{/tikz/circuitikz/tripoles/npn2/gate width}\pgf@circ@res@left}
{-\pgf@circ@res@temp}}
\pgfsetlinewidth{2\pgflinewidth}
\pgfusepath{draw}
\endpgfscope
\pgfpathmoveto{\pgfpoint
{\pgfkeysvalueof{/tikz/circuitikz/tripoles/npn2/gate width}\pgf@circ@res@left}
{-\pgfkeysvalueof{/tikz/circuitikz/tripoles/npn2/gate height 2}\pgf@circ@res@up}}
\pgf@circ@res@temp=\pgfkeysvalueof{/tikz/circuitikz/tripoles/npn2/gate height}\pgf@circ@res@up
\advance\pgf@circ@res@temp by \pgfkeysvalueof{/tikz/circuitikz/tripoles/npn2/slope}\pgf@circ@res@step
\pgfpathlineto{\pgfpoint{\pgf@circ@res@right}{-\pgf@circ@res@temp}}
\pgfpathlineto{\pgfpoint{\pgf@circ@res@right}{\pgf@circ@res@down}}
\pgfusepath{draw}
\pgf@circ@res@temp=\pgfkeysvalueof{/tikz/circuitikz/tripoles/npn2/gate height 2}\pgf@circ@res@up
\advance\pgf@circ@res@temp by \pgf@circ@res@step
\pgfpathmoveto{\pgfpoint
{\pgfkeysvalueof{/tikz/circuitikz/tripoles/npn2/gate width}\pgf@circ@res@left}
{-\pgf@circ@res@temp}}
\pgf@circ@res@temp=\pgfkeysvalueof{/tikz/circuitikz/tripoles/npn2/gate height}\pgf@circ@res@up
\advance\pgf@circ@res@temp by \pgf@circ@res@step
\pgfpathlineto{\pgfpoint{0pt}{-\pgf@circ@res@temp}}%
\pgfpathlineto{\pgfpoint{0pt}{\pgf@circ@res@down}}%
\pgfusepath{draw}
\pgfscope
\pgfslopedattimetrue
\pgfallowupsidedownattimetrue
\pgfresetnontranslationattimefalse
\pgftransformlineattime{.5}{%
\pgfpoint%
{\pgfkeysvalueof{/tikz/circuitikz/tripoles/npn2/gate width}\pgf@circ@res@left}%
{-\pgfkeysvalueof{/tikz/circuitikz/tripoles/npn2/gate height 2}\pgf@circ@res@up}%
}{\pgfpoint{0pt}{-\pgfkeysvalueof{/tikz/circuitikz/tripoles/npn2/gate height}\pgf@circ@res@up}}%
\pgfnode{currarrow}{center}{}{}{\pgfusepath{stroke}}
\endpgfscope
\pgfscope
\pgfslopedattimetrue
\pgfallowupsidedownattimetrue
\pgfresetnontranslationattimefalse
\pgf@circ@res@temp=\pgfkeysvalueof{/tikz/circuitikz/tripoles/npn2/gate height 2}\pgf@circ@res@up
\advance\pgf@circ@res@temp by \pgf@circ@res@step
\pgf@circ@res@other=\pgfkeysvalueof{/tikz/circuitikz/tripoles/npn2/gate height}\pgf@circ@res@up
\advance\pgf@circ@res@other by \pgf@circ@res@step
\pgftransformlineattime{.5}{%
\pgfpoint%
{\pgfkeysvalueof{/tikz/circuitikz/tripoles/npn2/gate width}\pgf@circ@res@left}%
{-\pgf@circ@res@temp}%
}{\pgfpoint{0pt}{-\pgf@circ@res@other}}%
\pgfnode{currarrow}{center}{}{}{\pgfusepath{stroke}}
\endpgfscope
\pgfpathmoveto{\pgfpoint
{\pgfkeysvalueof{/tikz/circuitikz/tripoles/npn2/gate width}\pgf@circ@res@left}
{0pt}}
\pgfpathlineto{\pgfpoint{\pgf@circ@res@left}{0pt}}
\pgfusepath{draw}
}
% create Tnpn2 to-path style
\pgf@circ@definetranspath{npn2}
\makeatother
\begin{document}
\begin{circuitikz}
\draw (0,0) node[npn2] (Q1) {npn2};
\node[above] at (Q1.C) {C};
\node[left] at (Q1.B) {B};
\node[below] at (Q1.E) {E};
\node[below right] at (Q1.E2) {E2};
%\draw[red] (Q1.north) -- (Q1.north east) -- (Q1.east) -- (Q1.south east) --
% (Q1.south) -- (Q1.south west) -- (Q1.west) -- (Q1.north west) -- cycle;
\path (2,0);
\end{circuitikz}
\end{document}
