\documentclass{standalone}

\usepackage{tikz,pgfplots}
\usepackage{siunitx}
\usepackage[siunitx,european]{circuitikz}
\usepackage{mathrsfs}
\usetikzlibrary{arrows}
\usepackage{amsbsy}
\usetikzlibrary{fadings}
\usetikzlibrary{patterns}
\usetikzlibrary{automata,positioning}
\usepackage{mwe,subcaption,tikz}
\tikzset{boximg/.style={remember picture,red,thick,draw,inner sep=0pt,outer sep=0pt}}
\pgfplotsset{compat=1.11}
\begin{document}
\definecolor{mygreen}{rgb}{0,0.78,0}
\begin{tikzpicture}

	\draw (0,0) to [dcvsource,l=$U_{in}$] (0,4)
	to [short] (6.5,4)
	to [european inductor, name=NP] (6.5,2)
	to [short] (5,2)
	to [Tnigfete, invert] (5,0)
	to [short] (0,0)
	(2,4) to [eC,a=$C_{in}$, *-*] (2,0)
	(5,4) to [american inductor, a=$L_m$, *-*] (5,2)
	(NP.core west) node[above, circ]{};
	\draw (10.5,2) to [short, o-] (7.5,2)
	to [european inductor, name=NS] (7.5,4)
	to [Do] (9.5,4)
	to [short, -o] (10.5,4)
	(9.5,4) to [C, a=$C_{out}$, *-*] (9.5,2) 
	(10.75,4.25) to [open, v^=$U_{out}$] (10.75,1.75)
	(NS.core west) node[below, circ]{};
	\draw (6.95,2.2) -- (6.95,3.8)
	(7.05,2.2) -- (7.05,3.8);
	\draw (7,1.5) node{$N=\frac{N_P}{N_S}$};
	
\end{tikzpicture}
\end{document}