- Acronym for field effect transistor. A semiconductor device whose flow of charge carriers, either electrons or holes, is controlled by an external electric field. Such transistors have three electrodes, which are the source, drain, and gate. The external field controls or modulates the gate, which in turn controls the current flowing from the source to the drain. The electrical path between the source and drain is called channel. Field-effect transistors are one of the two main classes of transistors, the other being bipolar junction transistors. Used extensively in computer chips.
- acronym forfield-effect transistor
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- noun a transistor, with at least three electrodes, in which a variable electric field controls the output current.