Una soluzione manuale e rapida (con posizionamento ad occhio):
`\documentclass
{standalone}
\usepackage{circuitikz}
\begin{document}
\begin{circuitikz}[american]
\draw (0,0) to [sV] (0,3)
to [short] (2,3);
\ctikzset{bipoles/americaninductor/width/.initial=1.6}
\ctikzset{bipoles/americaninductor/coils/.initial=8}
\draw (2,3) to [L] (2,0)
to [short] (0,0);
\ctikzset{bipoles/americaninductor/width/.initial=0.6}
\ctikzset{bipoles/americaninductor/coils/.initial=3}
\draw (4,0) to [short, o-] (3,0) — (3,0.36)
to [L] (3,1.46) -| (3.5,3) -| (3,2.79);
\draw (4,1.69) to [short, o-] (3,1.69)
to [L] (3,2.79);
\node at (2.5,1.5) [shape=rectangle, draw, thick, minimum width=0.3cm, minimum height=2.6cm] {};
\draw [latex-latex] (2.5,1) — (2.5,2);
\end{circuitikz}
\end{document}`
[attachment=603]prova_2013-02-18.pdf[/attachment]