File:FET_cross_section.svg · Wikimedia Commons · See Wikimedia Commons
field-effect transistor
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transistor that uses an electric field to control its electrical behaviour
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- Field-effect Transistors
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- FET
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Cross-sectional view of a MOSFET type field-effect transistor, showing source, gate and drain terminals, and insulating oxide layer.
The field-effect transistor (FET) is a type of transistor that uses an electric field to control the current through a semiconductor. It comes in two types: junction FET (JFET) and metal–oxide–semiconductor FET (MOSFET). FETs have three terminals: source, gate, and drain. FETs control the current by the application of a voltage to the gate, which in turn alters the conductivity between the drain and source.