% Author: Prof. Dr. Matthias Jung, DL9MJ
% Year: 2024
\begin{circuitikz}
    \draw(0,0) node[mixer, box](mix){};
    \draw(mix.west) node[inputarrow](){} -- ++(-2,0) node[anchor=east](){Insignal $f_\text{e}$};
    \draw(mix.south) node[inputarrow, rotate=90](){} -- ++(0,-0.5) node[bgeneratorshape, t={G}, anchor=north](gen){};
    \draw(mix.east) -- ++(+2,0) node[inputarrow](){} node[anchor=west](){Frequenzgemisch $f_\text{z}=|f_\text{e} \pm f_\text{o}|$};
    \draw(gen.east) node [anchor=west](){$f_\text{o}$};
\end{circuitikz}