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A feedback amplifier is also called as

(a) Open loop amplifier

(b) Closed loop amplifier

(c) Feedback network amplifier

(d) Looped network amplifier

I have been asked this question in a job interview.

My question comes from Block Diagram Representation of Feedback Configurations topic in chapter Operational Amplifier Characteristics of Linear Integrated Circuits

1 Answer

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by (6.5k points)

The correct answer is (b) Closed loop amplifier.

A feedback amplifier is often referred to as a closed-loop amplifier because it uses feedback from the output to the input, forming a closed-loop system. The feedback helps control the gain and stability of the amplifier.

In contrast, an open-loop amplifier does not have any feedback, and its gain is determined solely by the internal characteristics of the amplifier.

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