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Nyquist Rate ADCs

Nyquist Rate ADCs. Dr. Hossein Shamsi ECE Dept, K.N. Toosi University of Technology. Content. Sample & Hold Circuits Voltage Comparators Dual-Slope ADC Flash ADC SAR ADC Cyclic ADC Two-Step ADC Pipelined ADC Time Interleaved ADC. Ideal Voltage Comparator. Preview - Flash ADC.

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Nyquist Rate ADCs

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  1. Nyquist Rate ADCs Dr. Hossein Shamsi ECE Dept, K.N. Toosi University of Technology

  2. Content • Sample & Hold Circuits • Voltage Comparators • Dual-Slope ADC • Flash ADC • SAR ADC • Cyclic ADC • Two-Step ADC • Pipelined ADC • Time Interleaved ADC

  3. Ideal Voltage Comparator

  4. Preview - Flash ADC

  5. Design Considerations

  6. Gain Requirements

  7. How to Implement High Gain?

  8. How about Using an OpAmp or OTA?

  9. Cascade of Open-Loop Amplifiers

  10. Step Response (1)

  11. Step Response (2)

  12. Delay versus Number of Stages

  13. Optimum Number of Stages

  14. Optimum Gain per Stage

  15. Cascade of "Integrators" (1)

  16. Cascade of "Integrators" (2)

  17. Latched Comparator (2)

  18. Comparison

  19. Latch "Gain”

  20. Architecture Bother: دردسر Why bother?: یک اصطلاح است و به معنای به چه منظور است Why bother? = What’s the point?; It’s not necessary Kick back: لگد زدن metastable: ناپایدار

  21. Metastability (1)

  22. Metastability (2)

  23. Metastability (3)

  24. CMOS comparators

  25. Input Referred Offset

  26. Amplifier Offset Cancellation (1)

  27. Amplifier Offset Cancellation (2)

  28. Output Series Cancellation

  29. Input Series Cancellation

  30. Overdrive Recovery

  31. Comparator Example

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