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Chapter 6 Advanced Mirrors, Bias and OTAs

Chapter 6 Advanced Mirrors, Bias and OTAs. ADVANCED MIRRORS BIASING SINGLE SIDED OTAs FULLY DIFFERENTIAL OTAs. Advanced Current Mirrors. Advanced Current Mirrors. Wide Swing Constant gm Bias Ckt. Wide Swing Constant gm Bias Ckt. Wide Swing Bias of Cascode Ckts.

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Chapter 6 Advanced Mirrors, Bias and OTAs

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  1. Chapter 6Advanced Mirrors, Bias and OTAs ADVANCED MIRRORS BIASING SINGLE SIDED OTAs FULLY DIFFERENTIAL OTAs

  2. Advanced Current Mirrors

  3. Advanced Current Mirrors

  4. Wide Swing Constant gm Bias Ckt

  5. Wide Swing Constant gm Bias Ckt

  6. Wide Swing Bias of Cascode Ckts Bias String/ckt Cascode sink & source

  7. Boosted Mirrors and Cascodes

  8. Wide Swing Enhanced output mirror

  9. Folded Cascoded using Wide Swing Mirrors

  10. Example folded Cascode

  11. Current Mirror OTA

  12. Linear Settiing Reviewed Closed Loop OTA

  13. Fully Differential folded Cascoded • Note CMFB ckt BW must be > OTA BW. • M7 and M8 have been split in two and total Cascode current must be I

  14. FULLY DIFFERENTIAL CURRENT MIRROR OTA

  15. FULLY DIFFERENTIAL CURRENT MIRROR OTA

  16. Class AB Fully Diff OTA

  17. Fully Diff- Using Two Singled Ended OTAs

  18. Rail to Rail Fully Diff OTA

  19. Continious TimeCommon Mode Feedback

  20. Continious TimeCommon Mode Feedback

  21. Continious TimeCommon Mode Feedback

  22. Continious TimeCommon Mode Feedback • Objectives; • Wideband with out ringing PM > 75-90 degrees • Accept Rail to rail swing (Typ > OTA Vo peak to peak) • High linearity (Equal that of the OTA)

  23. Continious TimeCommon Mode Feedback

  24. Current Feedback Amp

  25. Current Feedback Amp

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