Question: A CG amplifier when fed with a signal source having Rsig = 1 0 0 is found to have an overall voltage gain of 1

A CG amplifier when fed with a signal source having Rsig =100 is found to have an overall voltage gain of
12 V/V. When a 100- resistance is added in series with the signal generator, the overall voltage gain decreases to
10 V/V. What must gm of the MOSFET be? If the MOSFET is biased at ID =0.25 mA, at what overdrive voltage
must it be operating?

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