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Neglecting Channel Length Modulation, if the transconductance increases, the input impedance of a follower stage ___________

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Neglecting Channel Length Modulation, if the transconductance increases, the input impedance of a follower stage ___________

(a) Remans the same

(b) Increases

(c) Decreases

(d) Doubles

This question was posed to me during an online exam.

This is a very interesting question from MOSFET Amplifier with CD Configuration in chapter FET Amplifiers of Analog Circuits

1 Answer

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Best answer
Correct choice is (a) Remans the same

Best explanation: The input impedance is extremely high for a follower stage because the input is applied to the gate of the MOSFET. The SiO2 layer is the primary reason for such a high impedance value.

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