Our second exemplary circuit is the parallel combination of a resistor, capacitor, and inductor
shown in Figure 3. The circuit is, for relatively obvious reasons, called a parallel RLC circuit. The
forcing function to the circuit is provided by a current source, iS(t). The circuit of Figure 3, like that
of Figure 2, contains two independent energy storage elements –we expect the governing
equations for the circuit to be second order differential equations. We will again develop
equations governing both the capacitor voltage, vC(t) and the inductor current, iL(t) as indicated in
Figure 3.