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metal-oxide-semiconductor field-effect transistor
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depletion mode versus enhancement mode MOSFETs A diagram showing a cross section of an n-channel MOSFET with labeled source, gate, and drain terminals connected to metal contacts on n-type regions within a p-type silicon base, alongside its circuit symbol. (A) Perspective of a MOSFET with (B) symbols for n- and p-channel devices.
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metal-oxide-semiconductor field-effect transistor

electronics
Also known as: MOSFET
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depletion mode versus enhancement mode MOSFETs
depletion mode versus enhancement mode MOSFETs In depletion mode metal-oxide-semiconductor field-effect transistors (MOSFETs), a secondary voltage is applied to deplete the region under the gate of charge carriers, thereby pinching off the current. In enhancement mode MOSFETs, a secondary voltage is used to enhance charge carriers beneath the gate, thereby allowing current to flow. Whereas the first type has to deplete a cross section of the semiconductor of carriers in order to switch the circuit's status, the second type only has to enhance a small region near the gate. Thus, enhancement mode MOSFETS are easier to control and can switch states faster than depletion mode MOSFETS.

The metal-oxide-semiconductor field-effect transistor (MOSFET) is a crucial component in modern electronics, particularly for very-large-scale integrated circuits. It belongs to the field-effect transistor family.1

A MOSFET operates by using an electric field to control the conductivity of a semiconductor channel. It has a gate electrode separated from the semiconductor substrate by an insulating layer, typically silicon dioxide. Applying a voltage to the gate attracts or repels charge carriers in the semiconductor, forming or depleting a conductive channel between the source and drain electrodes.23

MOSFETs are widely used because they can be easily scaled down, consume less power, and have simpler manufacturing processes compared to other transistors. They are essential for building logic circuits and are found in numerous electronic devices.132

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5 Britannica Sources
  1. semiconductor device - Metal-oxide-semiconductor field-effect transistors
  2. MOSFET
  3. integrated circuit - Field-effect transistors
  4. electronics - Using MOSFETs
  5. integrated circuit - Enhancement-mode FETs

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