IGNOU MPH 5 2026 - Describe the difference between the construction and operation of enha

Question

Describe the difference between the construction and operation of enhancement mode and depletion mode MOSFET.

19 Jan 2026

Answer :

Word Count : 267

Enhancement mode and depletion mode MOSFETs differ both in construction and operation. In terms of construction, an enhancement mode MOSFET is normally off at zero gate-to-source voltage (V_GS). For an n-channel enhancement MOSFET, the device is built with a lightly doped p-type substrate with two n+ source and drain regions. The channel between source and drain does not exist naturally; it is induced by applying a positive gate voltage that attracts electrons to form a conductive channel. In contrast, a depletion mode MOSFET is normally on at zero

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