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The input impedance of the follower stage is ____________ than that of a CG stage.

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The input impedance of the follower stage is ____________ than that of a CG stage.

(a) greater

(b) lesser

(c) equal

(d) cannot be compared

The question was posed to me in examination.

My doubt stems from MOSFET Amplifier with CD Configuration topic in chapter FET Amplifiers of Analog Circuits

1 Answer

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The correct option is (a) greater

To explain I would say: The input to a follower stage is at the gate of the MOSFET while for a CG stage, it’s at the source of the MOSFET. Hence, the input impedance of a follower will be very much greater than that of a CG stage.

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