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Negative Feedback in Op-Amps
hard

How does the phase margin in a negative feedback op-amp circuit influence the distortion levels when used in comparator circuits?

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A

A higher phase margin increases distortion

B

A lower phase margin reduces distortion

C

A higher phase margin reduces distortion

D

Phase margin has no effect on distortion

Understanding the Answer

Let's break down why this is correct

Phase margin shows how close the amplifier is to oscillating. Other options are incorrect because Thinking that a bigger margin makes the circuit louder is a mix‑up; Lowering the margin seems like a quick fix, but it allows the amplifier to swing too far, causing bumps.

Key Concepts

Phase margin
Impact on distortion
Comparator circuits
Topic

Negative Feedback in Op-Amps

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hard level question

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Definition
Definition

Negative feedback in op-amps involves connecting the output back to the input to achieve self-correction. In negative feedback, the ideal op-amp forces the inverting and non-inverting inputs to be equal, maintaining stability and precise control.

Topic Definition

Negative feedback in op-amps involves connecting the output back to the input to achieve self-correction. In negative feedback, the ideal op-amp forces the inverting and non-inverting inputs to be equal, maintaining stability and precise control.

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