\documentclass[12pt,border=1pt,crop,multi=false,tikz,class=scrartcl]{standalone} \usepackage[T1]{fontenc} \usepackage[utf8]{inputenc} \usepackage{lmodern} \usepackage{circuitikz}  \renewcommand*{\familydefault}{\sfdefault}  \begin{document}     \begin{circuitikz}      \draw [semithick]             (0,0) node [op amp] (op1) {}             (5,-.5) node [op amp] (op2) {}             (op1.-) -| (-2,1.5) to [R=$R_1$,*-o] ++(-4,0) node [left] {in}             (-2,1.5) to [C=$C$] ++(3.5,0) to [short,-*] (1.5,0) to [short] (op1.out)             (op1.+) to [R=$R_2$,*-] ++(-4,0) to [short,-*] ++(0,2)             (op1.+) to [R=$R_4$] ++(0,-2.5) node [ground] {}             (op1.out) to [short,-*] (2.5,0) to [short,-o] ++(0,3) node [above] {out1}             (2.5,0) -- (op2.-)             (-2,0.5) to [short,*-] ++(0,-3.5) to [R,l_=$R_5$] ++(0,-2) node [nmos,anchor=D,xscale=-1] (nmos) {}             (nmos.S) node [ground] {}             (nmos.G) to [R=$R_3$] ++(4,0) -| (op2.out) to [short,*-o] ++(1,0) node [right] {out2}             (op2.+) -| (3,-2.5) to [R=$R_6$] ++(0,-2) node [ground] {}             (3,-2) to [R,l_=$R_7$,*-*] ($(op2.out)+(0,-1.5)$)        	;     \end{circuitikz} \end{document}