Chapter 13 : Bipolar Junction Transistors

1. Chapter 13 : Bipolar Junction Transistors 13-0 Introduction 13-1 Current and voltage relationships 13-2 Common –emitter characteristics 13-3 Load –line analysis 13-4 pnp bipolar junction transistors 13-5 Large signal DC circuit models 13-6 Large signal DC analysis 13-7 Small –signal equivalent circuits 13-8 Common –emitter amplifiers 13-9 Emitter followers

2. 13-0 Introduction

7. Fig. 5-1 General structure of npn BJT

8. Fig. 5-3 Current flow in a npn BJT

9. 13-1 Current and voltage relationships

11. Equations of operation

14. Exercise 13-1

16. Another example

18. 13-3 Load-line analysis of a common emitter amplifier

19. Load- line analysis of the amplifier (cont’d)

20. Example 13-2 : Load-line analysis of a BJT amplifier

21. Example 13-2 (cont’d)

22. Fig. 5-13 Circuit symbols for BJT

23. Fig. 5-14 . Voltage polarities and current flow of BJT in the active mode

24. Fig. 5-2 A general structure of pnp BJT

25. Fig. 5-11 Current flow in a pnp BJT

26. Fig. 5-5 Large area equivalent circuit models for npn BJT in the active mode

27. Fig. 5-19 . Early effect

28. Fig. 5-51 . Hybrid Pi model for small signal operation

29. Fig. 5-52 . T model for small signal operation

30. Fig. 5-58 . Hybrid Pi small signal model with r0

31. Pi and T model with r0

38. The Widlar Current Mirror (p.653)

40. Another example