% Author: Dr. Matthias Jung, DL9MJ
% Year: 2020
% TD301-3
\begin{circuitikz}
    \draw (0.8,0) -- ++(6.5,0) node[inputarrow]{};
    \draw[ultra thick, rounded corners=0.2]
        (1,0) sin ++(0.5,-1) cos ++(0.5,1);
    \draw[ultra thick, rounded corners=0.2]
        (3,0) sin ++(0.5,-1) cos ++(0.5,1);
    \draw[ultra thick, rounded corners=0.2]
        (5,0) sin ++(0.5,-1) cos ++(0.5,1);
    \draw (0.4,0) node[]{0\,V};
\end{circuitikz}