In the following C.S. stage shown below, what is the input impedance (ideally) if channel length modulation is neglected?(a) Infinite(b) Very high(c) Very low(d) Cannot be determinedThe question was asked by my college director while I was bunking the class.Enquiry is from MOSFET Amplifier with CS Configuration topic in division FET Amplifiers of Analog Circuits

In the following C.S. stage shown below, what is the input impedance (

1.	In the following C.S. stage shown below, what is the input impedance (ideally) if channel length modulation is neglected?(a) Infinite(b) Very high(c) Very low(d) Cannot be determinedThe question was asked by my college director while I was bunking the class.Enquiry is from MOSFET Amplifier with CS Configuration topic in division FET Amplifiers of Analog Circuits
Answer» CORRECT option is (a) Infinite To explain: Ideally, the input IMPEDANCE while looking into the gate of the MOSFET is infinite. This is because of the SIO2 layer which BEHAVES as an insulator.

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