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Op-Amp Gain and Practical Considerations
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What is the primary effect of a high Power Supply Rejection Ratio (PSRR) on the performance of an operational amplifier (op-amp) gain in a circuit?

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A

It enhances the gain of the op-amp.

B

It reduces the impact of power supply variations on the output voltage.

C

It increases the input impedance of the op-amp.

D

It lowers the overall bandwidth of the circuit.

Understanding the Answer

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A high PSRR means the op‑amp ignores changes in the supply voltage. Other options are incorrect because Increasing PSRR does not raise the amplifier’s strength; Input impedance depends on the op‑amp’s internal transistor design, not on PSRR.

Key Concepts

Op-amp gain
Power supply rejection ratio (PSRR)
Topic

Op-Amp Gain and Practical Considerations

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medium level question

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Definition
Definition

While op-amps do not have infinite gain in practice, their high gain allows for reliable circuit design using negative feedback. Op-amp gain specifications vary between models, and practical op-amp circuits rely on predictable gain behavior.

Topic Definition

While op-amps do not have infinite gain in practice, their high gain allows for reliable circuit design using negative feedback. Op-amp gain specifications vary between models, and practical op-amp circuits rely on predictable gain behavior.

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