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Neglecting Channel Length Modulation, if the transconductance of the MOSFET increases, the gain of the follower stage will _________

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Neglecting Channel Length Modulation, if the transconductance of the MOSFET increases, the gain of the follower stage will _________

(a) decreases

(b) increases

(c) doesn’t get affected

(d) doubles

I had been asked this question in my homework.

Question is from MOSFET Amplifier with CD Configuration topic in division FET Amplifiers of Analog Circuits

1 Answer

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Best answer
The correct choice is (b) increases

The best I can explain: The gain of the follower stage is given by Rs/(1/gm + Rs). Hence, we readily conclude that if the transconductance (gm) increases, the gain will increase.

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