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Opamps and OTAs

Opamps and OTAs. A/(1 +  s). A/(1 +  s). Opamps and OTAs. Opamps and OTAs. Voltage feedback Current feedback. Opamps and OTAs. Voltage feedback RF, RI Divider Current feedback Ifb = Vo x GF. Ibias error IB x RB – IB RF||RI Err = 0 for RB = RF||RI. Graphical Design.

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Opamps and OTAs

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  1. Opamps and OTAs A/(1 +  s) A/(1 +  s)

  2. Opamps and OTAs

  3. Opamps and OTAs Voltage feedback Current feedback

  4. Opamps and OTAs Voltage feedback RF, RI Divider Current feedback Ifb = Vo x GF Ibias error IB x RB – IB RF||RI Err = 0 for RB = RF||RI

  5. Graphical Design Available Design Space

  6. Opamps and OTAs Noninverting v1=Vinv v2=Vnoninv

  7. Noninverting Amp v2=Vinv v1=vnoninv

  8. Inverting Amp v1 v1=Vinv v2=Vnoninv v2

  9. Inverting Amp v1 v2

  10. Graphical Design • = RFCF = • 1/(2  f)

  11. Diff Amp Alternate Analysis

  12. Diff Amp con’t

  13. Improved Diff Amp - Instrumentation Amp

  14. Finite Bandwidth Effects

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