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Determine the least voltage VDS required to operate E-MOSFET on active region. (Vgs=2V,Vt=0.7V)

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Determine the least voltage VDS required to operate E-MOSFET on active region. (Vgs=2V,Vt=0.7V)

(a) 1.2V

(b) 2V

(c) 0V

(d) 1.3V

The question was asked during a job interview.

Question is from The Insulated-Gate FET(MOSFET) in chapter Field-Effect Transistors of Electronic Devices & Circuits

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Right answer is (d) 1.3V

To explain: VDS=Vgs-Vt                                                                                                                                                       VDS=2-0.7V                                                                                                                                                                     VDS=1.3V.

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