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Electronic Devices & Circuits BJT Amplifiers

In a common-emitter amplifier, bypassing the emitter resistor with a sufficiently large capacitor generally causes the midband voltage gain magnitude to?

ADecrease substantially
BIncrease
CBecome exactly zero
DBecome independent of transistor parameters in all cases

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Correct Answer: B. Increase

Explanation: At signal frequencies where the capacitor effectively bypasses the emitter resistor, emitter degeneration is reduced, so the voltage-gain magnitude generally increases.

Reference: Standard analog electronics: emitter bypass capacitor

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