1. ELECTRICAL ENGINEERING: PRINCIPLES AND APPLICATIONS, Third Edition, by Allan R. Hambley, ©2005 Pearson Education, Inc. Chapter 13 Bipolar Junction Transistors

2. ELECTRICAL ENGINEERING: PRINCIPLES AND APPLICATIONS, Third Edition, by Allan R. Hambley, ©2005 Pearson Education, Inc. Chapter 13 Bipolar Junction Transistors 1. Understand bipolar junction transistor operation in amplifier circuits. 2. Analyze simple amplifiers using the load- line technique and understand the causes of nonlinear distortion.

3. ELECTRICAL ENGINEERING: PRINCIPLES AND APPLICATIONS, Third Edition, by Allan R. Hambley, ©2005 Pearson Education, Inc. 3. Use large-signal equivalent circuits to analyze BJT circuits. 4. Analyze bias circuits. 5. Use small-signal equivalent circuits to analyze BJT amplifiers. 6. Compute performance of several important amplifier configurations. 7. Select an amplifier configuration appropriate for a given application.

4. ELECTRICAL ENGINEERING: PRINCIPLES AND APPLICATIONS, Third Edition, by Allan R. Hambley, ©2005 Pearson Education, Inc.

6. Equations of Operation

7. ELECTRICAL ENGINEERING: PRINCIPLES AND APPLICATIONS, Third Edition, by Allan R. Hambley, ©2005 Pearson Education, Inc.

9. COMMON-EMITTER CHARACTERISTICS

10. ELECTRICAL ENGINEERING: PRINCIPLES AND APPLICATIONS, Third Edition, by Allan R. Hambley, ©2005 Pearson Education, Inc.

11. Common-emitter Input Characteristic

12. ELECTRICAL ENGINEERING: PRINCIPLES AND APPLICATIONS, Third Edition, by Allan R. Hambley, ©2005 Pearson Education, Inc. Common-emitter Output Characteristics

13. ELECTRICAL ENGINEERING: PRINCIPLES AND APPLICATIONS, Third Edition, by Allan R. Hambley, ©2005 Pearson Education, Inc.

16. LOAD-LINE ANALYSIS OF A COMMON-EMITTER AMPLIFIER (Input Circuit)

17. ELECTRICAL ENGINEERING: PRINCIPLES AND APPLICATIONS, Third Edition, by Allan R. Hambley, ©2005 Pearson Education, Inc. LOAD-LINE ANALYSIS OF A COMMON-EMITTER AMPLIFIER (Output Circuit)

18. ELECTRICAL ENGINEERING: PRINCIPLES AND APPLICATIONS, Third Edition, by Allan R. Hambley, ©2005 Pearson Education, Inc.

22. When i C becomes zero, we say that the transistor is cutoff. When v CE 0.2 V, we say that the transistor is in saturation.

23. ELECTRICAL ENGINEERING: PRINCIPLES AND APPLICATIONS, Third Edition, by Allan R. Hambley, ©2005 Pearson Education, Inc. PNP BIPOLAR JUNCTION TRANSISTORS Except for reversal of current directions and voltage polarities, the pnp BJT is almost identical to the npn BJT.

24. ELECTRICAL ENGINEERING: PRINCIPLES AND APPLICATIONS, Third Edition, by Allan R. Hambley, ©2005 Pearson Education, Inc.

29. LARGE-SIGNAL DC CIRCUIT MODELS (Active-Region Model)

30. ELECTRICAL ENGINEERING: PRINCIPLES AND APPLICATIONS, Third Edition, by Allan R. Hambley, ©2005 Pearson Education, Inc. LARGE-SIGNAL DC CIRCUIT MODELS (Saturation-Region Model)

31. ELECTRICAL ENGINEERING: PRINCIPLES AND APPLICATIONS, Third Edition, by Allan R. Hambley, ©2005 Pearson Education, Inc. LARGE-SIGNAL DC CIRCUIT MODELS (Cutoff-Region Model)

32. ELECTRICAL ENGINEERING: PRINCIPLES AND APPLICATIONS, Third Edition, by Allan R. Hambley, ©2005 Pearson Education, Inc. Analysis of the Fixed Base Bias Circuit

33. ELECTRICAL ENGINEERING: PRINCIPLES AND APPLICATIONS, Third Edition, by Allan R. Hambley, ©2005 Pearson Education, Inc.

41. Analysis of the Four-Resistor Bias Circuit

42. ELECTRICAL ENGINEERING: PRINCIPLES AND APPLICATIONS, Third Edition, by Allan R. Hambley, ©2005 Pearson Education, Inc.

45. i b (t) denotes the signal current flowing into the base, I BQ is the dc current that flows when the signal is absent, and i B (t) is the total base current. Similar notation is used for the other currents and voltages.

46. ELECTRICAL ENGINEERING: PRINCIPLES AND APPLICATIONS, Third Edition, by Allan R. Hambley, ©2005 Pearson Education, Inc.

48. Small-Signal Equivalent Circuit for the BJT

49. ELECTRICAL ENGINEERING: PRINCIPLES AND APPLICATIONS, Third Edition, by Allan R. Hambley, ©2005 Pearson Education, Inc.

50. COMMON-EMITTER AMPLIFIERS

51. ELECTRICAL ENGINEERING: PRINCIPLES AND APPLICATIONS, Third Edition, by Allan R. Hambley, ©2005 Pearson Education, Inc.

57. The common-emitter amplifier is inverting and has large voltage gain magnitude, large current gain, and large power gain.

58. ELECTRICAL ENGINEERING: PRINCIPLES AND APPLICATIONS, Third Edition, by Allan R. Hambley, ©2005 Pearson Education, Inc. EMITTER FOLLOWERS

59. ELECTRICAL ENGINEERING: PRINCIPLES AND APPLICATIONS, Third Edition, by Allan R. Hambley, ©2005 Pearson Education, Inc.

62. Output Impedance

63. ELECTRICAL ENGINEERING: PRINCIPLES AND APPLICATIONS, Third Edition, by Allan R. Hambley, ©2005 Pearson Education, Inc.

64. Even though the voltage gain of the emitter follower is less than unity, the current gain and power gain can be large.