\documentclass[border=1mm]{standalone}

\usepackage{amsmath} % for \dfrac

\usepackage{tikz,tkz-tab}
\usetikzlibrary{arrows}
\usetikzlibrary{patterns}
\usetikzlibrary{decorations.pathmorphing}
\usetikzlibrary{arrows,calc,decorations.markings}
\usetikzlibrary{shapes}

\usepackage{tikz,pgfplots}
\usepackage[siunitx]{circuitikz} %[symbols]
\usepackage[outline]{contour} % glow around text
\usetikzlibrary{arrows,arrows.meta,patterns}
\usetikzlibrary{decorations.markings}
\tikzset{>=latex} % for LaTeX arrow head
\pgfplotsset{compat=1.18}


\begin {document}

\begin{circuitikz}[scale =1, european resistors]
\draw(5,.5) node [op amp] (opamp){};
\draw(3.8,1)--(3.8,2)--(6.2,2)-|(opamp.out);
\draw(0,0)to[C,l=$C$]++(1,0)to[R,l=$R$](opamp.+);
\draw(opamp.+)-|(3.8,0)to[L,l=$L$](3.8,-2)node[ground]{};
\draw[-stealth](0,-1.7)--(0,-0.2)node[midway,left]{$u_e$};
\draw (-0.5,-1.8)--(10.5,-1.8);

\draw(opamp.out)--(6.5,0.5);
\draw(6.5,0.5) to[C,l=$C$]++(1,0)to[R,l=$R$](10.5,0.5);
\draw[-stealth](10.5,-1.7)--(10.5,0.3)node[midway,right]{$u_s$};
\draw (9.8,0.5)to[L,l=$L$](9.8,-1.8);
\end{circuitikz}
\end{document}