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Exam Questions Papers - Engineering

Q1:

A n-channel JFET has IDSS = 2 mA, Gate to source voltage VGS = - 2 V and trans-conductance is 0.5 mW then pinch-off voltage is __________ .

A - 2 V

B 2 V

C - 4 V

D 4 V

ANS:C - - 4 V

∴ ∴ = - 8VP - 16 ∴ + 8VP + 16 = 0 ∴ (VP + 4)2 = 0 ∴ VP = -4 V.