\draw (0,0) to [short,-,i=$i_{\mathrm{I}}(t)$] (1,0)
            to [R,l=$R_{}$,-*] (1,-2)
            to [short,-] (0,-2);

\draw (1,0) to [short,*-] (2,0)
            to [american inductor,l=$L_{}$,-] (2,-2)
            to [short,*-] (1,-2);

\draw (2,0) to [short,*-,i=$i_{\mathrm{O}}(t)$] (3,0)
            to [C,l=$C_{}$] (3,-2)
            to [short,-] (2,-2);             

\node[ground] () at (2,-2) {};


\draw (-0.5,0) to [short,-o] (-0.1,0) to [short,-] (0,0);
\draw (-0.5,-2) to [short,-o] (-0.1,-2) to [short,-] (0,-2);
\draw (-0.5,0) to [I]  (-0.5,-2);