ECE 4991 Electrical and Electronic Circuits Chapter 5

1. ECE 4991 Electrical and Electronic CircuitsChapter 5

2. Grades so far…

3. Where are we? • Chapter 2 - The basic concepts and practice at analyzing simple electric circuits with sources and resistors • Chapter 3 – More harder networks to analyze and the notion of equivalent circuits • Chapter 4 – Capacitors and inductors added to the mix • Chapter 5 – Analyzing transient situations in complex passive networks • Chapter 8 – New subject – the wonders of operational amplifiers as system elements • Chapter 9 – Introduction to semiconductors – the basics and diodes – more network analysis • Chapter 10 – Bipolar junction transistors and how they work – now you can build your own op amp

4. What’s Important in Chapter 5 • Definitions, Concepts & Units • Writing differential equations for first-order circuits • Solving circuits in initial and final circuit conditions

5. 1. Definitions, Concepts & Units • Switch • Capacitor characteristics • Inductor characteristics • All you already know about circuit analysis • First order circuits • Second order circuits • t   • t = 0 or t = 0+ or t = 0- • Steady state • Equilibrium

6. 2. Writing differential equations for first order circuits • Use KVL R C V

7. First order circuits • Use KVL R L V

8. I First order circuits • Use KCL R C

9. I First order circuits • Use KCL L R

10. Working with LCR Circuits R3 R2 I C V R1

11. Working with LCR Circuits R3 R2 I C V R1

12. Working with LCR Circuits R3 R2 I C V R1

13. I Working with LCR Circuits L R2 V R1 C

14. For Next Time • Get incredibly familiar with the characteristics of LCR circuits! • Prepare for our quiz