21
7.5 The Step-Response
of a RL Circuit (2)
•   Three steps to find out the step response of an RL circuit:
1.The initial inductor current i(0) at t = 0+.
2.The final inductor current i(¥).
3.The time constant t.
Note: The above method is a short-cut method. You may also determine the solution by setting up the circuit formula directly using KCL, KVL , ohms law, capacitor and inductor VI laws.