% Author: Dr. Matthias Jung, DL9MJ
% Year: 2020
\begin{circuitikz}
    \draw(0,0)
        node[anchor=south west](){HF}
        to [short, o-] ++(2,0)
        node[inputarrow] {}
        node[mixer, box, label=Mischer, anchor=west] (mix) {};
    \draw (mix.south)
        node[inputarrow, rotate=90] {}
        to [short, label=${f}_{\mathrm{OSZ}}$] ++(0,-1.5)
        node [vallpassshape, anchor=north](vco){};
    \draw(vco.east)
        node[anchor=west](){VCO};
    \draw (mix.east)
        to [bandpass, >] ++(3,0)
        node[inputarrow](){}
        node[anchor=south east](){ZF};
\end{circuitikz}