% Author: Dr. Matthias Jung, DL9MJ
% Year: 2020
\begin{circuitikz}[step=\getDarcImageFactor cm]
    \tikzstyle{help lines}=[black];
    \draw[style=help lines] (0,-3) grid (8,3);
    \draw[rounded corners=3mm, ultra thick, black] (0,-2) -- (1,-2) -- (2,2) -- (5,2) -- (6,-2) -- (8,-2);
    \node[] at (7,-3.5) {50\,\textmu s/Div.};
    \node[rotate=90] at (-0.5,2) {3\,V/Div.};
    \node[] at (-0.5,-2) {0\,V};
\end{circuitikz}