\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}[american]      \draw [semithick]             (0,0) to [R,v_=$v_{be}$,l^=$r_\pi$] (0,-2)             (0,0) to [short,-o] (-1,0) node [left] {B}             (0,-2) to [short,-*] (2,-2) to [short,-o] ++(0,-1) node [below] {E}             (2,0) to [cI=$g_mv_{be}$] (2,-2)             (2,0) to [short,-*] (4,0) to [R=$r_o$] (4,-2) to [short] (2,-2)             (4,0) to [short,-o] ++(1,0) node [right] {C}        	;     \end{circuitikz} \end{document}