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What is the voltage gain of a simplified CC configuration amplifier if RE = 25kΩ and re‘ = 12kΩ?(a) 0.68(b) 0.59(c) 0.48(d) 0.086I got this question at a job interview.This interesting question is from Simplified Calculations for the CC Configuration topic in section Low Frequency Transistor Amplifier Circuit of Electronic Devices & Circuits

Answer»

Correct option is (a) 0.68

To explain I would say: The voltage gain AV of a simplified COMMON COLLECTOR amplifier configuration can be CALCULATED using AV = RE / (RE + re‘) . GIVEN, RE = 25kΩ and re‘ = 12kΩ:

AV = RE / (RE + re‘) = 25 / 25 + 12 = 25 / 37 = 0.675 ≈ 0.68



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