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Which of the following is actually not a function of emitter bypass capacitor?

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Which of the following is actually not a function of emitter bypass capacitor?

(a) Increase gain

(b) Lower the impedance of emitter resistance

(c) Provide a low reactance path

(d) Help emitter resistance to withstand voltage variation

The question was posed to me during a job interview.

The doubt is from Characteristics of Amplifier topic in division Transistor Biasing and Low Frequencies of Analog Circuits

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Correct option is (d) Help emitter resistance to withstand voltage variation

Best explanation: The emitter bypass capacitor is not meant for reducing loading effect of emitter resistance. It is to increase gain. It provides a low reactive path to the AC signal without changing the quiescent point.

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