MOSFET

Metal Oxide Semiconductor Field Effect Transistor.

A class of voltage-driven devices that do not require the large input drive currents of bipolar devices; a type of field-effect transistor that operates and functions similar to a junction field effect transistor (JFET). The distinction is that in the MOS device the controlling gate voltage is applied to the channel region across an oxide insulating material, rather than across a P-N junction. The term can be applied either to transistors in an IC or to discrete transistors. The major advantage of a MOSFET is low power due to its insulation from source and drain. MOSFETs are of both P-channel and N-channel types. Sometimes called "insulated gate field effect transistor" (IGFET).

N-channel MOSFET symbol N-channel MOSFET symbol

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Schematic symbols for an N-channel MOSFET

Schematic symbols for a P-channel MOSFET

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Structure of an N-channel MOSFET

See also channel, drain, gate and source. Meanwhile, AMS has a good MOSFET tutorial here.


Legalities  Image 

Page author: Eric Seale  
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