ABSTRACT
For resistive (or memoryless) circuits, given the circuit structure, the present output depends only on the present input. In order to analyze a dynamic circuit, however, in addition to the present input it is also necessary to know the state of the circuit at some time t0. The state of the circuit at t0 represents the condition of the circuit at t¼ t0, and is related to the energy storage of the circuit, or the voltage (or electric charge) across the capacitor and the currents (or magnetic fluxes) through the inductors. These voltages and currents are considered as the state of the circuit at t¼ t0. For t> t0, the behavior of the circuit is completely characterized by these variables. In view of the preceding, a definition for the state of a circuit can now be given.
