Presentation on Oscillators

1. Oscillators
Operational Amplifiers
(Breadth Core-I)

2. Oscillators

3. Oscillators

4. Oscillators
Comparator Circuit

5. Feedback Oscillators

6. Feedback Oscillators

7. Feedback Oscillators

8. Feedback Oscillators

9. Feedback Oscillators
• For example,
– if the attenuation B of the
feedback circuit is 0.01, the
amplifier must have a gain
of exactly 100 to overcome
this attenuation and not
create unacceptable
distortion (0.01 x 100 = 1).
– An amplifier gain of
greater than 100 will cause
the oscillator to limit both
peaks of the waveform.

10. Start-Up Conditions

11. Start-Up Conditions

12. RC- Feedback Circuits

13. Wien-Bridge Oscillator

14. Wien-Bridge Oscillator

15. Wien-Bridge Oscillator

16. Wien-Bridge Oscillator

17. Wien-Bridge Oscillator

18. Wien-Bridge Oscillator

19. Wien-Bridge Oscillator

20. Wien-Bridge Oscillator

21. Wien-Bridge Oscillator

23. Wien-Bridge Oscillator

24. The Phase-Shift Oscillator

25. The Phase-Shift Oscillator

26. The Phase-Shift Oscillator

27. The Phase-Shift Oscillator

28. The Twin-T Oscillator

29. The Twin-T Oscillator

30. The Twin-T Oscillator

31. Relaxation Oscillators

32. The Triangular Wave Oscillator

33. The Triangular Wave Oscillator

34. The Triangular Wave Oscillator

35. The Triangular Wave Oscillator

36. The Triangular Wave Oscillator

37. The Triangular Wave Oscillator

38. A Sawtooth Voltage-Controlled
Oscillator

39. A Sawtooth Voltage-Controlled
Oscillator

40. A Sawtooth Voltage-Controlled
Oscillator

41. A Sawtooth Voltage-Controlled
Oscillator

42. A Sawtooth Voltage-Controlled
Oscillator

43. A Square-Wave Oscillator

44. A Square-Wave Oscillator

45. Review Questions