% Author: Prof. Dr. Matthias Jung, DL9MJ
% Year: 2022
\begin{tikzpicture}
	\pgfplotsset{
		every axis plot/.append style={line width=0.8pt},
	}
    \def\function#1{1/(1/100+(#1-(1/(#1)))^2)}
    \begin{axis}[%
        /pgf/number format/1000 sep={ },
        /pgf/number format/use comma,        
        axis lines=middle,
        axis line style={-Triangle},
        width=\linewidth*\getDarcImageFactor,
        height=4cm,
        scale only axis,
        every major tick/.append style={thick, black},
        grid=major,
        grid style={line width=.1pt, draw=gray!10},
        major grid style={line width=.2pt,draw=gray!50},
        xtick={0.9},
        xticklabel={$f_\text{ZF}$},
        yticklabel=\empty,
        ytick style={draw=none},
        xmin=0.6,
        xmax=1.7,
        ymin=1,
        ymax=300,
        xmajorgrids=false,
        ymajorgrids=false,
        ymode=log,
        xlabel style={at={(ticklabel* cs:1)},anchor=west},
        ylabel style={at={(ticklabel* cs:1)},anchor=south},
        ylabel={$U$},
        xlabel={$f$},
    ]
    \addplot[domain=0:2, DARCred, thick, samples=3000] {\function{x}};
    \pgfplotsinvokeforeach {0.85,0.9,0.95}
    {
        \draw [DARCgray, dashed] (axis cs: #1, 0.1) |- (axis cs: 0.1, {\function{#1}});
    }
    %
    \draw[Triangle-Triangle](axis cs: 0.85, 2) -- (axis cs: 0.95, 2);
    \draw(axis cs: 0.89, 2) node[anchor=south](){\textDelta $f$};
    %
    \draw(axis cs: 1, {\function{1}}) node[anchor=south](){$f_\text{res}$};
    %
    \draw[Triangle-Triangle](axis cs: 0.7, {\function{0.85}}) -- (axis cs: 0.7, {\function{0.95}});
    \draw(axis cs: 0.7, {\function{0.9}}) node[anchor=west](){\textDelta $U$};
\end{axis}
\end{tikzpicture}%