如何在 Circuitikz 中放置電晶體，使其集電極（或任何特定節點）位於給定座標？

Question

\documentclass[border=10pt]{standalone}
\usepackage[american,siunitx]{circuitikz}


\begin{document}

\begin{circuitikz}
\draw (0,0)
node[transformer] (T) {};

\draw (T.B1)
to [D] (3,|-T.B1)
to [R] (3,|-T.B2)
-- (T.B2);

{
\ctikzset{bipoles/resistor/width =0.4}
\draw (3,|-T.B1)
to [vR] (6,|-T.B1)
to [R] (6,-1);
}

\draw (3,-1)
node [npn,xscale=-1] (npn) {} 
(npn.collector) ;

\end{circuitikz}

\end{document}

如何將電晶體的集電極放置在最右側電阻的末端？

Answer 1

使用收集器的錨點（circuitikz文件解釋了元件的預定義錨點，但在這種情況下，您也可以使用「標準」TikZ 錨點）：

\documentclass[border=10pt]{standalone}
\usepackage[american,siunitx]{circuitikz}

\begin{document}

\begin{circuitikz}
\draw (0,0)
node[transformer] (T) {};

\draw (T.B1)
to [D] (3,|-T.B1)
to [R] (3,|-T.B2)
-- (T.B2);

{
\ctikzset{bipoles/resistor/width =0.4}
\draw (3,|-T.B1)
to [vR] (6,|-T.B1)
to [R] 
(6,-1) node [npn,xscale=-1,anchor=C] (npn) {} 
(npn.collector);
}
\end{circuitikz}

\begin{circuitikz}
\draw (0,0)
node[transformer] (T) {};

\draw (T.B1)
to [D] (3,|-T.B1)
to [R] (3,|-T.B2)
-- (T.B2);

{
\ctikzset{bipoles/resistor/width =0.4}
\draw (3,|-T.B1)
to [vR] (6,|-T.B1)
to [R] (6,-1);
}

\draw (6,-1)
  node [npn,xscale=-1,anchor=B,rotate=-90] (npn) {} 
  (npn.collector);
\end{circuitikz}

\end{document}