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Op Amp Revision Q1

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The document describes a voltage amplifier circuit that uses feedback. It asks to derive an expression for the closed-loop voltage gain Gv in terms of the open-loop gain Avo and feedback fraction 硫. The derivation shows that the closed-loop voltage gain Gv is equal to the open-loop gain Avo divided by the feedback fraction 硫.

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Operational Amplifier Basics Revision Question 1 Figure 1 shows the representation of a voltage amplifier with a fraction 硫 of the output fed back to the input. Derive an expression for the closed-loop voltage gain, Gv = Vout/Vin in terms of the open-loop voltage gain, Avo and the feedback fraction 硫.
Operational Amplifier Basics Revision Question 1 vout AVO(vin vout ) vout AVOvin AVO vout vout AVO vout AVOvin vout (1 AVO ) AVOvin vout AVO AVO 1 Gv vin (1 AVO ) AVO

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Op Amp Revision Q1

  • 1. Operational Amplifier Basics Revision Question 1 Figure 1 shows the representation of a voltage amplifier with a fraction 硫 of the output fed back to the input. Derive an expression for the closed-loop voltage gain, Gv = Vout/Vin in terms of the open-loop voltage gain, Avo and the feedback fraction 硫.
  • 2. Operational Amplifier Basics Revision Question 1 vout AVO(vin vout ) vout AVOvin AVO vout vout AVO vout AVOvin vout (1 AVO ) AVOvin vout AVO AVO 1 Gv vin (1 AVO ) AVO