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Op-Amp Gain and Practical Considerations
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In a closed-loop configuration of an operational amplifier (Op-Amp), what is the main purpose of adding feedback resistors?

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A

To stabilize the gain of the Op-Amp

B

To increase the input impedance

C

To reduce the output impedance

D

To eliminate noise completely

Understanding the Answer

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The two resistors decide how much of the output is sent back to the input. Other options are incorrect because Many think feedback raises the input side’s resistance, but it does not; Feedback does not make the amplifier’s output drive weaker.

Key Concepts

Closed-loop configuration
Topic

Op-Amp Gain and Practical Considerations

Difficulty

easy level question

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understand

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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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