1. Chapter 10 Stability and Frequency Compensation
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Chapter 10 Stability and Frequency Compensation

2. Copyright © The McGraw-Hill Companies, Inc.
Basic Stability

3. Stable and Unstable Systems
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Stable and Unstable Systems

4. Stability and Complex Poles
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Stability and Complex Poles

5. Basic One Pole Bode Plot
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Basic One Pole Bode Plot

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Multipole Systems

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Phase Margin

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Phase Margin (cont.)
-180
Phase Margin, m = 45

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Phase Margin (cont.)

10. Small Signal Analysis Limitations
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Small Signal Analysis Limitations
Small signal analysis yields 65  of m, but large signal transient response is different. Large signal simulation includes effects not seen in small signal analysis.

11. Frequency Compensation
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Frequency Compensation
Compensation is the manipulation of gain and/or pole positions to improve phase margin.

12. Copyright © The McGraw-Hill Companies, Inc.
Compensation (cont.)

13. Single Ended Single Stage Amp
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Single Ended Single Stage Amp
Dominant Pole at Output

14. Pre- and Post-Compensation
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Pre- and Post-Compensation

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Compensation (cont.)

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Compensation Example

17. Fully Differential Telescopic Op-Amp
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Fully Differential Telescopic Op-Amp

18. Cascode Current Source Impedance
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Cascode Current Source Impedance

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Compensation (cont.)

20. Compensation (cont.) Recall, from Chap. 6: (assume CC includes CGD9)
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Compensation (cont.)
Recall, from Chap. 6:
(assume CC includes CGD9)

21. Copyright © The McGraw-Hill Companies, Inc.
Compensation (cont.)

22. Copyright © The McGraw-Hill Companies, Inc.
Compensation (cont.)

23. Phase and Magnitude of RHP Zero
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Phase and Magnitude of RHP Zero

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RHP Zero Removal

25. RHP Zero Removal (cont.)
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RHP Zero Removal (cont.)

26. Miller Compensation (cont.)
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Miller Compensation (cont.)
Temp. and Process Tracking

27. Miller Compensation (cont.)
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Miller Compensation (cont.)

28. Load Capacitance Effects
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Load Capacitance Effects

29. Other Compensation Techniques (cont.)
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Other Compensation Techniques (cont.)

30. Other Compensation Techniques (cont.)
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Other Compensation Techniques (cont.)

31. Other Compensation Techniques (cont.)
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Other Compensation Techniques (cont.)

32. Other Compensation Techniques (cont.)
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Other Compensation Techniques (cont.)

33. Slewing in Two-Stage Op Amps
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Slewing in Two-Stage Op Amps
Basic Two-Stage Op Amp

34. Slewing in Two-Stage Op Amp
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Slewing in Two-Stage Op Amp

35. Slewing with Common-Gate Compensation
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Slewing with Common-Gate Compensation