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Negative Feedback in Op-Amps
hard

A sound engineer is designing a feedback system for a microphone amplifier to minimize noise and enhance audio clarity. They decide to implement negative feedback in their op-amp circuit. Which of the following outcomes is the most likely result of using negative feedback in this scenario?

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A

The output will become unstable, leading to distortion in the audio signal.

B

The input impedance will decrease, which may cause the microphone to pick up more unwanted noise.

C

The gain of the amplifier will be reduced but the linearity and stability of the output will improve.

D

The circuit will only respond to high-frequency signals, ignoring lower frequencies.

Understanding the Answer

Let's break down why this is correct

When negative feedback is added, a small part of the output is returned to the input. Other options are incorrect because Some think feedback makes a circuit unstable; The idea that feedback reduces input impedance is a misconception.

Key Concepts

Negative Feedback in Op-Amps
Operational Amplifier Stability
Audio Signal Processing
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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