ELEC 226, Spring 2003

Prof. Rich Kozick

Prof. Rich Kozick

- Analyze the circuit at t=0
^{-}: Find the capacitor voltage / inductor current. - Analyze the circuit at t=0
^{+}: The capacitor voltage / inductor current is the same as at t=0^{-}. - For the desired voltages / currents in the circuit:
- Find the "initial value" at t=0
^{+}. - Find the "final value" as t -> infinity. (This is sometimes easier to find from the Thevenin equivalent circuit.)

- Find the "initial value" at t=0
- Find the time constant, L
_{eq}/R_{Th}or C_{eq}* R_{Th}:- Find the equivalent capacitance / inductance (if more than one capacitor / inductor).
- Find the Thevenin resistance, R
_{Th}, at the terminals of the capacitor / indictor.

- Use the general formula for step response.