% Author: Prof. Dr. Matthias Jung, DL9MJ
% Year: 2024
\begin{tikzpicture}
    \begin{axis}[%
        title={Eingangssignal},
        axis lines=middle,
        yticklabel=\empty,
        xmin=0,
        xmax=7,
        ymin=-4,
        ymax=4,
        xtick={0},
        ytick={0},
        xticklabels={},
        axis line style={-Triangle},
        xticklabel style={/pgf/number format/.cd,fixed,precision=1,use comma,fixed,fixed zerofill},
        xlabel style={at={(ticklabel* cs:1)},anchor=north east},
        ylabel style={at={(ticklabel* cs:1)},anchor=south east,rotate=90},
        ylabel={Amplitude},
        xlabel={$t$},
        scale only axis,
        height=3cm,
        width=0.3*\linewidth*\getDarcImageFactor        
    ]
    \addplot[DARCblue, smooth, domain=0:6.28, samples=100, thick] {0.15*sin(deg(x))}; 
    \addplot[DARCdarkblue, smooth, domain=0:6.28, samples=100, thick] {0.25*sin(deg(x))}; 
    \addplot[black, smooth, domain=0:6.28, samples=100, thick] {0.35*sin(deg(x))}; 
    \end{axis}
\end{tikzpicture}%
\begin{tikzpicture}
    \begin{axis}[%
        title={Verstärkung},
        axis lines=middle,
        yticklabel=\empty,
        xmin=0,
        xmax=7,
        ymin=-4,
        ymax=4,
        xtick={0},
        ytick={0},
        xticklabels={},
        axis line style={-Triangle},
        xticklabel style={/pgf/number format/.cd,fixed,precision=1,use comma,fixed,fixed zerofill},
        xlabel style={at={(ticklabel* cs:1)},anchor=north east},
        ylabel style={at={(ticklabel* cs:1)},anchor=south east,rotate=90},
        ylabel={Amplitude},
        xlabel={$t$},
        scale only axis,
        height=3cm,
        width=0.3*\linewidth*\getDarcImageFactor        
    ]
    \addplot[DARCred, domain=0:6.28, thick] {0.75} node[anchor=south east](){\tiny Begrenzung};
    \addplot[DARCred, domain=0:6.28, thick] {-0.75};
    \addplot[DARCblue, smooth, domain=0:6.28, samples=100, thick] {7*0.15*sin(deg(x))}; 
    \addplot[DARCdarkblue, smooth, domain=0:6.28, samples=100, thick] {7*0.25*sin(deg(x))}; 
    \addplot[black, smooth, domain=0:6.28, samples=100, thick] {7*0.35*sin(deg(x))}; 
    \end{axis}
\end{tikzpicture}%
\begin{tikzpicture}
    \begin{axis}[%
        title={Ausgangssignal},
        axis lines=middle,
        yticklabel=\empty,
        xmin=0,
        xmax=7,
        ymin=-4,
        ymax=4,
        xtick={0},
        ytick={0},
        xticklabels={},
        axis line style={-Triangle},
        xticklabel style={/pgf/number format/.cd,fixed,precision=1,use comma,fixed,fixed zerofill},
        xlabel style={at={(ticklabel* cs:1)},anchor=north east},
        ylabel style={at={(ticklabel* cs:1)},anchor=south east,rotate=90},
        ylabel={Amplitude},
        xlabel={$t$},
        scale only axis,
        height=3cm,
        width=0.3*\linewidth*\getDarcImageFactor        
    ]
    \addplot[DARCblue, smooth, domain=0:3.14, samples=100, thick] {min(0.75,7*0.15*sin(deg(x)))}; 
    \addplot[DARCblue, smooth, domain=3.14:6.28, samples=100, thick] {max(-0.75,7*0.15*sin(deg(x)))}; 
    \addplot[DARCdarkblue, smooth, domain=0:3.14, samples=100, thick] {min(0.75,7*0.25*sin(deg(x)))}; 
    \addplot[DARCdarkblue, smooth, domain=3.14:6.28, samples=100, thick] {max(-0.75,7*0.25*sin(deg(x)))}; 
    \addplot[black, smooth, domain=0:3.14, samples=100, thick] {min(0.75,7*0.35*sin(deg(x)))}; 
    \addplot[black, smooth, domain=3.14:6.28, samples=100, thick] {max(-0.75,7*0.35*sin(deg(x)))}; 
    \end{axis}
\end{tikzpicture}%