7.78 A CG amplifier when fed with a signal source having Rsig = 100 Ω is found to have an overall voltage gain of 12 V/V. When a 100-Ω 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?
7.78 A CG amplifier when fed with a signal source having Rsig = 100 Ω is found to have an overall voltage gain of 12 V/V. When a 100-Ω 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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