% Author: Dr. Matthias Jung, DL9MJ; Stephan Kregel, DG1HXJ
% Year: 2020/2021
\begin{circuitikz}[european]
    \draw(0,0) coordinate(u0)
        to [short, o-*] ++(4,0) coordinate(u1)
        to [short,  -o] ++(6,0) coordinate(u2){}
        node[anchor=west](){--};
    \draw(u0) ++ (0,-1) coordinate(gg1);
    \draw(u0)
        to [open, straight voltages, v_<={$U_\mathrm{E}$}] ++(0,4)
        to [C, o-*] ++(4,0) coordinate(m1)
        to [short, i={$I_\mathrm{B}$}] ++(1,0)
        node[npn, tr circle, anchor=B](trans){};
    \draw(trans.E)
        to [short,-*] (trans.E|-u1)
        node[rground](){};
    \draw(trans.C)
        to [C,*-o] (trans.C-|u2) coordinate(m2);
    \draw(trans.C)
        to [open] ++(1,0) coordinate(h1)
        to [open, straight voltages, v^>={$U_\mathrm{CE}$}] (h1|-u2);
    \draw(trans.C)
        to [R, i<={$I_\mathrm{C}$},-*] ++(0,4) coordinate(o1)
        to [short, -o] (o1-|u2)
        node[anchor=west](){+};
    \draw(o1) 
        to [short] (o1-|m1) coordinate(o5)
        to [R] (o5|-trans.C)
        to [short] (m1);
    \draw(o5)
        to [short, *-] ++(-2,0)
        to [C] ++(0,-2)
        node[rground](){};
    \draw(u2)
        to [open, straight voltages, v<={$U_\mathrm{A}$}] (m2);
    \draw(u1)
        to [R] (m1);

    \begin{axis}[%
        at={(gg1)},
        anchor={north west},
        name=gg2,
        /pgf/number format/1000 sep={ },
        /pgf/number format/use comma,        
        axis lines=middle,
        axis line style={-Triangle},
        ytick={0},
        every major tick/.append style={thick, black},
        grid=major,
        grid style={line width=.1pt, draw=gray!10},
        major grid style={line width=.2pt,draw=gray!50},
        xticklabel=\empty,
        yticklabel=\empty,
        xtick style={draw=none},
        ytick style={draw=none},
        xmin=0,
        xmax=4.2*pi,
        ymin=-0.75,
        ymax=0.75,
        xmajorgrids=false,
        ymajorgrids=false,
        xlabel style={at={(ticklabel* cs:1)},anchor=north east},
        ylabel style={at={(ticklabel* cs:1)},anchor=north east},
        ylabel={$U_\mathrm{E}$},
        xlabel={$t$},
        width=0.4\linewidth*\getDarcImageFactor,
        height=1cm,
        scale only axis,
    ]
        \addplot[samples=500,domain=0:4.0*pi,smooth,black] {0.5*sin(deg(x))+0}; 
    \end{axis}

    \draw(gg2.outer north east) ++(1,0) coordinate(gg3);

    \begin{axis}[%
        at={(gg3)},
        anchor={outer north west},
        /pgf/number format/1000 sep={ },
        /pgf/number format/use comma,        
        axis lines=middle,
        axis line style={-Triangle},
        ytick={0},
        every major tick/.append style={thick, black},
        grid=major,
        grid style={line width=.1pt, draw=gray!10},
        major grid style={line width=.2pt,draw=gray!50},
        xticklabel=\empty,
        yticklabel=\empty,
        xtick style={draw=none},
        ytick style={draw=none},
        xmin=0,
        xmax=4.2*pi,
        ymin=-0.25,
        ymax=2.25,
        xmajorgrids=false,
        ymajorgrids=false,
        xlabel style={at={(ticklabel* cs:1)},anchor=north east},
        ylabel style={at={(ticklabel* cs:1)},anchor=north east},
        ylabel={$I_\mathrm{B}$},
        xlabel={$t$},
        width=0.4\linewidth*\getDarcImageFactor,
        height=1cm,
        scale only axis,
    ]
            \addplot[samples=500,domain=0:4.0*pi,smooth,black] {0.5*sin(deg(x))+1.2}; 
    \end{axis}
\end{circuitikz}