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What is the other name for a high frequency response of emitter follower amplifier configuration?

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What is the other name for a high frequency response of emitter follower amplifier configuration?

(a) Common collector

(b) Common base

(c) Common emitter

(d) Amplifier circuit

This question was posed to me in final exam.

This interesting question is from High-Frequency Response of the Emitter Followers topic in section Frequency Response of Electronic Devices & Circuits

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Correct answer is (a) Common collector

For explanation: The high frequency response of emitter follower circuit configuration is also known as the common collector configuration as it provides a high input impedance and a low output impedance. The high frequency response of emitter follower circuit acts as a buffer stage, and in result is used in several circuits where there is a need to prevent the loading of a circuit.

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