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Grade: 12th pass
        
Why In MOSFET after the pinchoff voltage (vds>vgs-vth) the current remains constant (saturates) even if I go on increase the drain to source voltage.
one year ago

Answers : (1)

Saurabh Koranglekar
askIITians Faculty
2402 Points
							Dear student

no channel exist at the drain end. but current flows due to the electric field in the depletion region. when electron comes to pinch off region, they all swept out to drain by the depletion region electric field. no of electrons reaching to drain is lesser but their average velocity increases. this results a constant current at saturation.

Regards
one month ago
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