1. ECE 255 Apr 26, 2018 Lecture Instructor: Weng Cho Chew Email: wcchew@purdue.edu Office: 3053 Wang Hall

2. Miller Effect

4. Miller Effect, Contd.

5. Miller Effect, Contd.

6. Miller Effect, Contd. Physical Interpretation Caution

7. Miller Effect, Contd.

8. Miller Effect, Contd.

9. Validity of Single-Pole Approximation

10. Miller Effect, BJT

11. Miller Effect Observations

12. Miller’s Theorem

13. Miller’s Theorem An elegant proof given by Milena Davidovic in 1999 in IEEE Trans. Education.

14. High-Frequency Gain Function

15. Finding fH • Single pole case:

16. Finding fH, Contd. • Double pole case:

17. Finding fH, Contd.

18. Low-Frequency Gain Function

19. Low-Frequency Gain Function, Contd.

20. Open-Circuit Time-Constant Method Short-Circuit Time-Constant Method Revisited

21. Open-Circuit Time-Constant Method, Contd.

28. Clicker Question 1 (1 Point) In the Miller effect, a single pole system is used to replace: A single pole system A double pole system A triple pole system