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What type of negative feedback does the high frequency response of emitter follower amplifier provide?

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What type of negative feedback does the high frequency response of emitter follower amplifier provide?

(a) Voltage, current and power

(b) Voltage

(c) Current

(d) Power

The question was asked in a national level competition.

Question is taken from High-Frequency Response of the Emitter Followers in section Frequency Response of Electronic Devices & Circuits

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Correct option is (c) Current

Explanation: The high frequency response of emitter follower configuration is prominently known for its feedback amplifier qualities. It is a negative feedback network that provides a negative feedback of current to the circuit. It is generally used in the last stage of an amplifying network.

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