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In an n-channel E-MOSFET, the current becomes constant in saturation region. Which of the following condition depicts this?(a) VDS = 2Vgs-Vt(b) VDS > Vgs-Vt(c) VDS ≤ Vgs-Vt(d) VDS = VgsThis question was posed to me in examination.Question is taken from The Insulated-Gate FET(MOSFET) in portion Field-Effect Transistors of Electronic Devices & Circuits

Answer»

Correct option is (b) VDS > Vgs-Vt

To explain I would say: The n-channel E-MOSFET operates in the saturation region when VDS > Vgs-Vt, since we will be fixing the gate to source voltage and threshold is a system constant, WHATEVER may be the VALUE of VDS which is greater than Vgs-Vt, the CURRENT remains the same.



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