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What type of amplifier is an emitter follower amplifier?

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What type of amplifier is an emitter follower amplifier?

(a) Voltage amplifier

(b) Wideband amplifier

(c) Feedback amplifier

(d) Power amplifier

I got this question by my college director while I was bunking the class.

This interesting question is from The Emitter Follower in chapter Low Frequency Transistor Amplifier Circuit of Electronic Devices & Circuits

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The correct choice is (c) Feedback amplifier

For explanation I would say: The emitter follower amplifier is one of the most noticeable feedback amplifiers. It provides a negative current feedback to the circuit. These type of amplifiers are usually used in the end stage or the last stage of a series of amplifiers.

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