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Why does an op-amp without feedback is not used in linear circuit application?

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+1 vote
in Linear Integrated Circuits by (39.8k points)
Why does an op-amp without feedback is not used in linear circuit application?

(a) Due to high current gain

(b) Due to high voltage gain

(c) Due to high output signal

(d) All of the mentioned

This question was addressed to me during an interview.

My question is from Input Offset Voltage topic in division Operational Amplifier Fundamentals of Linear Integrated Circuits

1 Answer

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by (39.8k points)
The correct choice is (b) Due to high voltage gain

Let me simplify it: In an op-amp without feedback, the voltage gain is extremely high (ideally infinite). Because of the high risk of distortion and clipping of the output signal, an op-amp in open loop configuration is not used in linear circuit application.

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