1

Lecture 12:RLC Circuits – Part DeuxNilsson & Riedel 8.3-8.4

ENG17 (Sec. 2): Circuits I

Spring 2014

May 6, 2014

2

Overview

• Natural Response – Critically Damped

• Step Response in Parallel RLC

• Series RLC

3

Critically Damped

4

Recap

Overdamped Underdamped Critically Damped

5

Overview

• Natural Response – Critically Damped

• Step Response in Parallel RLC

• Series RLC

6

Step Response

7

ExampleInitial Energy = 0 JAt t = 0:• OPEN switch• I = 24 mA• R = 400 Ω

8

Overview

• Natural Response – Critically Damped

• Step Response in Parallel RLC

• Series RLC

9

Series RLC: Natural Response

10

Example: Natural Response

11

Series RLC: Step Response

12

Example: Step Response

13

Note

14

Overview

• Natural Response – Critically Damped

• Step Response in Parallel RLC

• Series RLC