GATE EC 2014 Set 2 — Question 48
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Electronic Devices → MOS Capacitor & MOSFET → I-V & Transconductance
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Question
For the n-channel MOS transistor shown in the figure, the threshold voltage is V. Neglect channel length modulation effects. When the drain voltage V, the drain current was found to be mA. If is adjusted to be V by changing the values of and , the new value of (in mA) is
Correct answer
(C) 1.125
Solution
Since the gate is connected to the drain, . The MOSFET is in saturation because (i.e., ).The drain current in saturation is .Case 1: .Case 2: .
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