Basic FET Amplifiers

1. CO2005: Electronics I Basic FET Amplifiers 張大中 中央大學 通訊工程系 dcchang@ce.ncu.edu.tw Electronics I, Neamen 3th Ed.

2. Small-Signal Model for MOSFETs Electronics I, Neamen 3th Ed.

3. Transconductance for MOSFETs Electronics I, Neamen 3th Ed.

4. Electronics I, Neamen 3th Ed.

5. AC Equivalent Circuit for MOSFETs Electronics I, Neamen 3th Ed.

6. Small-Signal Equivalent Circuit for MOSFETs • Finite Output Resistance Electronics I, Neamen 3th Ed.

7. Electronics I, Neamen 3th Ed.

8. PMOS Common-Source Circuits Electronics I, Neamen 3th Ed.

9. Modeling the Body Effect Electronics I, Neamen 3th Ed.

10. The Common-Source Amplifier • Assume that the transistor is biased in the saturation region and that the signal frequency is sufficiently large for the coupling capacitor to act essentially as a short circuit. Input Resistance Output Resistance Electronics I, Neamen 3th Ed.

11. Electronics I, Neamen 3th Ed.

12. Electronics I, Neamen 3th Ed.

13. Electronics I, Neamen 3th Ed.

14. Common-Source Amplifier with Source Resistor Electronics I, Neamen 3th Ed.

15. Electronics I, Neamen 3th Ed.

16. Common-Source Circuit with Source Bypass Capacitor Electronics I, Neamen 3th Ed.

17. The Source-Follower Amplifier • Small-Signal Voltage Gain • Input Resistance • Output Resistance Electronics I, Neamen 3th Ed.

18. Electronics I, Neamen 3th Ed.

19. Electronics I, Neamen 3th Ed.

20. Electronics I, Neamen 3th Ed.

21. Common-Gate Circuits • Small-Signal Voltage Gain • Small-Signal Current Gain • Input and Output Resistance Electronics I, Neamen 3th Ed.

22. Electronics I, Neamen 3th Ed.

23. Load Line • Load line of a single transistor with a resistive load Electronics I, Neamen 3th Ed.

24. NMOS Amplifiers with Enhancement Load • An NMOS Enhancement Load Transistor Electronics I, Neamen 3th Ed.

25. NMOS Amplifiers with Enhancement Load • An NOMOS Amplifier with Enhancement Load Electronics I, Neamen 3th Ed.

26. NMOS Amplifiers with Enhancement Load • Small-Signal Voltage Gain Electronics I, Neamen 3th Ed.

27. Electronics I, Neamen 3th Ed.

28. Electronics I, Neamen 3th Ed.

29. Electronics I, Neamen 3th Ed.

30. NMOS Amplifier with Depletion Load • An NMOS Depletion Load Transistor Electronics I, Neamen 3th Ed.

31. NMOS Amplifier with Depletion Load • An NMOS Amplifier with Depletion Load Electronics I, Neamen 3th Ed.

32. NMOS Amplifier with Depletion Load • Small-Signal Voltage Gain Electronics I, Neamen 3th Ed.

33. Electronics I, Neamen 3th Ed.

34. NMOS Amplifier with PMOS Load • Common-Source Amplifier Transition Point for M1 Transition Point for M2 Electronics I, Neamen 3th Ed.

35. NMOS Amplifier with PMOS Load • Small-Signal Model for Common-Source Amplifier Electronics I, Neamen 3th Ed.

36. Electronics I, Neamen 3th Ed.

37. NMOS Amplifier with PMOS Load • CMOS Source-Follower and Common-Gate amplifiers Electronics I, Neamen 3th Ed.

38. Electronics I, Neamen 3th Ed.

39. Electronics I, Neamen 3th Ed.

40. Electronics I, Neamen 3th Ed.

41. Electronics I, Neamen 3th Ed.

42. Electronics I, Neamen 3th Ed.

43. Electronics I, Neamen 3th Ed.

44. Basic JFET Amplifiers • Transconductance in the Small-Signal Equivalent Circuit • Since is negative for n-channel JFETs, the transconductance is positive. A relationship that applies to both n-channel and p-channel JFETs is Electronics I, Neamen 3th Ed.

45. Basic JFET Amplifiers • Finite Output Resistance • Small-Signal Model Electronics I, Neamen 3th Ed.

46. Electronics I, Neamen 3th Ed.

47. Electronics I, Neamen 3th Ed.

48. Electronics I, Neamen 3th Ed.

49. Electronics I, Neamen 3th Ed.