What channel length must be transistor have

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In a MOS cascode amplifier, the cascode transistor is required to raise the output resistance by a factor of 40.

(1) If the transistor is operated at Vov=0.2V, what must its VA be?
(2) If the process technology specifies VA as 5V/m, what channel length must be transistor have?

Reference no: EM13254586

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