% Author: Prof. Dr. Matthias Jung, DL9MJ
% Year: 2023
\begin{circuitikz}
    \draw(0,0)
        to [twoportsplit, >, l_=1] ++(2,0) coordinate(c1);
    \draw(c1)
        node [inputarrow](){}
        node [twoportshape, circuitikz/bipoles/twoport/width=1.75, anchor=west](c2){};
    \draw(c2.east)
        to [twoportsplit, >, l_=2] ++(2,0) coordinate(c1)
        node [inputarrow](){};
    \draw(c2.north)
        node[anchor=north](c4){\footnotesize Digitale Signal-};
    \draw(c2.south)
       node[anchor=south](c5){\footnotesize verarbeitung};
\end{circuitikz}