\documentclass[12pt,border=1pt,crop,multi=false,tikz,class=scrartcl]{standalone}
\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}
\usepackage{times}
\usepackage[siunitx]{circuitikz}

\renewcommand*{\familydefault}{\sfdefault}

\begin{document}
\begin{tikzpicture}
\node {
	\begin{circuitikz}
		\draw [semithick] (0,0) node[npn] (npn) {}	
			(npn.base) node[anchor=north east] {B}	% labels
			(npn.collector) node[anchor=south east] {C}
			(npn.emitter) node[anchor=north east] {E}	
			($(npn)-(0.18,0)$) circle [radius=18pt]		% circle around Q
            (npn.B) -- (-3,0) node (n1) {} to [R,*-] ++(0,2) node (n2) {}
            (npn.C) to [short,-*] (0,2) node (n3) {} to [short] (n2)
            (n3) to [short,-*] ++(1.5,0) node (n5) {} to [L] node [above right=6mm and 2mm] {\scriptsize Choke} ++(0,-2)
            (npn.E) -- ++(0,-1) node (n4) {} to [short,*-] ++(1.5,0) to [battery] ++(0,2)
            (n4) to [short] ++(-1,0) node [ground] {}
            (3,-3) to [pC,*-] ++(0,5) to [short] (n5)
            (-3,-3) to [L,*-*] ++(3,0) to [L] ++(3,0)
            (-3,-3) to [pC] ++(0,3)
            (0,-3) to [short] (n4)
            (-3,-3) to [short] ++(0,-1) to [pC] ++(6,0) to [short] ++(0,1)
       	;
        \node at (0,-5) {\Large Hartley Oscillator};
    \end{circuitikz}
};
\node at ++(8,0) {
    \begin{circuitikz}
		\draw [semithick] (0,0) node[npn] (npn) {}	
			(npn.base) node[anchor=north east] {B}	% labels
			(npn.collector) node[anchor=south east] {C}
			(npn.emitter) node[anchor=north east] {E}	
			($(npn)-(0.18,0)$) circle [radius=18pt]		% circle around Q
            (npn.B) -- (-3,0) node (n1) {} to [R,*-] ++(0,2) node (n2) {}
            (npn.C) to [short,-*] (0,2) node (n3) {} to [short] (n2)
            (n3) to [short,-*] ++(1.5,0) node (n5) {} to [L] node [above right=6mm and 2mm] {\scriptsize Choke} ++(0,-2)
            (npn.E) -- ++(0,-1) node (n4) {} to [short,*-] ++(1.5,0) to [battery] ++(0,2)
            (n4) to [short] ++(-1,0) node [ground] {}
            (3,-3) to [pC,*-] ++(0,5) to [short] (n5)
            (-3,-3) to [pC,*-*] ++(3,0) to [pC] ++(3,0)
            (-3,-3) to [pC] ++(0,3)
            (0,-3) to [short] (n4)
            (-3,-3) to [short] ++(0,-1) to [L] ++(6,0) to [short] ++(0,1)
       	;
        \node at (0,-5) {\Large Colpitts Oscillator};
    \end{circuitikz}
};
\end{tikzpicture}
\end{document}