Which one of the following is not a basic MOSFET device type?

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RRB ALP Electronics Mechanic 23 Jan 2019 Official Paper (Shift 3)
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  1. Enhancement P-channel MOSFET
  2. Depletion N-channel MOSFET
  3. Narrow P-channel MOSFET
  4. Enhancement N-channel MOSFET

Answer (Detailed Solution Below)

Option 3 : Narrow P-channel MOSFET
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Detailed Solution

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MOSFET:

The MOSFET is a voltage-controlled field-effect transistor.

It has a “Metal Oxide” Gate electrode which is electrically insulated from the main semiconductor n-channel or p-channel by a very thin layer of insulating material usually silicon dioxide (SiO2), commonly known as glass.

Insulating SiO2 layer provides High input impedance.

MOSFET is of two types:

Depletion type (D-MOSFET):

  • Presence of physical layer between source and drain.
  • We can apply both positive and negative between source and gate.

Enhancement type (e-MOSFET):

  • Absence of physical layer between source and drain
  • Only one type of polarity voltage between gate and source such that physical layer should form.


Symbol representation of MOSFET:

F1 Savita Engineering 13-2-23 D1 V2

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