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Which of the following is true for the voltage gain (AV) for the common source configuration (represented by A1) and the common gate configuration (represented by A2)?(a) A1 = A2(b) |A1| = |A2| and A1 ≠ A2(c) |A1| > |A2|(d) |A1| < |A2|This question was addressed to me in quiz.This intriguing question originated from Basic MOSFET Amplifier Configurations topic in portion MOS Field Effect Transistors (MOSFETs) of Electronic Devices & Circuits

Answer»

Correct answer is (B) |A1| = |A2| and A1 ≠ A2

For explanation: A1 = -GM(RL||RD) and A1 = gm(RL||RD)

Reference figure for common SOURCE configuration

Reference figure for common gate configuration



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