% Author: Prof. Dr. Matthias Jung, DL9MJ
% Year: 2024
\begin{circuitikz}
    \draw[-Triangle](0.0,0.0) -- (3.5,0.0)  node[right]{$f$};
    \draw[-Triangle](0.0,0.0) -- (0.0,1.75) node[above left, rotate=90] () {Leistung};
    \draw[thick](0.3,0.0) coordinate(c1) -- ++ (0,1.25) -- ++ (2.4,-0.5) -- (2.7,0) coordinate(c2);
    \draw(c1) node[below]{$\qty{300}{\hertz}$};
    \draw(c2) node[below]{$\qty{3}{\kilo\hertz}$};
    %
    \draw[-Triangle, DARCblue] (4,0.75) -- ++(1,0);  
    \draw[DARCblue] (4.5,1.25) node [](){LSB};
    %
    \draw[thick, DARCgray](9.00,0.0) -- ++ (0,1.75) ++(0,0.25) coordinate(f1);
    \draw[thick, DARCgray](9.15,0.0) -- ++ (0,1.25) -- ++ ( 0.5,-0.5) -- ++(0,-0.75) coordinate(h1);
    \draw[thick, DARCblue](8.85,0.0) -- ++ (0,1.25) -- ++ (-0.5,-0.5) -- ++(0,-0.75) coordinate(h2);
    \draw[DARCblue](8.35,-0.0) node[anchor=west, rotate=-90] () {\qty{8998,5}{\kilo\hertz}};
    \draw[DARCblue](8.85,-0.0) node[anchor=west, rotate=-90] () {\qty{9001,2}{\kilo\hertz}};
    \draw[DARCred, rounded corners=2mm*\getDarcImageFactor] (10.5,0) -- (8.925,0.0) -- ++(0,1.6) -- ++(-0.65,0) -- ++(0,-1.6) -- (5.5,0);
    %
	\draw[-Triangle](5.5,0.0) -- ++(5.0,0.0) node[right] () {$f$};
	\draw[-Triangle](5.5,0.0) -- ++(0.0,1.75);
    %
    \draw[DARCgray](f1) node[anchor=south](){\qty{9001,5}{\kilo\hertz}};
\end{circuitikz}