% Author: Stephan Kregel, DG1HXJ
% Year: 2021
% Update 2025: Christoph Fischer, DC6GF

\begin{circuitikz}[european]
	\draw (-1,-0.5)
    	to [C,o-] (1,-0.5);
	\draw (5,-3.5) node[anchor=west]{$-$}
		to [short,o-] (3,-3.5);
	\draw (3,-0.5) node[npn](npn){} (npn.collector) 
		to [R,i<^=$I_\mathrm{C}$,l_=$R_\mathrm{C}$,-*] (3,3)
		to [short,-o] (5,3) node[anchor=west]{$+$};
	\draw ($(npn)-(0.18,0)$) circle [radius=14pt];
	\draw (npn.collector)
    	to [C,*-o] ++(2,0);
	\draw (3,-3.5) node[rground]{}
    	to [open,*-*] (3,-3.5); 
	\draw (-1,-3.5)
    	to [short,o-*] (3,-3.5)
        to [R,l_=$R_\mathrm{E}$,*-] (3,-1) -- (npn.emitter);
	\draw (0,2) node[rground]{}
    	to [C] (0,3) -- (3,3);
	\draw (1,-3.5)
    	to [R,l_=$R_2$,*-*] (1,-0.5)
        to [R,l_=$R_1$,*-*] (1,3);
	\draw (npn.B)
    	to [short](1,-0.5);
	\draw [ultra thick] (0.75,-0.25) -- ++(0.5,0.5);
	\draw [ultra thick] (1.25,-0.25) -- ++(-0.5,0.5);
\end{circuitikz}