2.1d Current Source

Current Source

A current source is a circuit component that forces a specific current $I_s$ through its terminals. The direction of the current is specified by the arrow indicated on the symbol. The voltage through it is determined by the rest of the circuit.

\usepackage{circuitikz}
\begin{document}
\begin{circuitikz}[american]
\node at (0,3.75) {Symbol};

\draw
(0,0) to [I, v>=$V_{elem}$, i=$I_s$] (0,3);
\end{circuitikz}
\hspace{1cm}
\begin{tikzpicture}[domain=0:4]
\node at (0,2.25) {IV Relationship};
\draw[<->] (-1.5,0)—(1.5,0) node[below]{$V_{elem}$};
\draw[<->] (0,-1.5)—(0,1.5) node[left]{$I_{elem}$};
\draw[<->, color=red] (-1,0.75)—(1,0.75) node[below]{$y=I_s$};
\end{tikzpicture}
\hspace{1cm}
\begin{tikzpicture}
\node at (0,2.25) {$V_{elem}=?$};
\node at (0,1.75) {$I_{elem}=I_s$};
\node at (0,0){};
\end{tikzpicture}
\end{document}