Concept
Field-effect transistor
Overview
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.
FETs are also known as unipolar transistors since they involve single-carrier-type operation. That is, FETs use either electrons (n-channel) or holes (p-channel) as charge carriers in their operation, but not both. Many different types of field-effect transistors exist. Field effect transistors generally display very high input impedance at low frequencies. The most widely used field-effect transistor is the MOSFET.
Overview adapted from Wikipedia (CC BY-SA 4.0; see the article history for authors).
Possible passages
Found by search and not yet checked by a person; they may only mention the idea in passing.
In what is termed osmose, we have a further mode of an allied kind. When on opposite sides of a permeable septum, and especially a septum of colloidal substance, are placed miscible solutions of different densities, a double transfer takes place: a large quantity of the less dense…
Herbert Spencer, The Principles of Biology, Volume 1
States what Field-effect transistor is.
The above-described experiment of comparing a clang with some of its overtones teaches us that these latter really exist in sensation, and that we can perceive them with very intense attention. Nevertheless under ordinary circumstances we do not perceive them as independent tones, but they appear to us massed together only as a specific modification of the fundamental tone, and we call this its clang-colour or…
Wilhelm Max Wundt, An Introduction to Psychology Translated from the Second German Edition
States what Field-effect transistor is.
"Mnemic phenomena" are defined as those due to engrams; in animals, they are specially associated with the nervous system, but not exclusively, even in man. When two stimuli occur together, one of them, occurring afterwards, may call out the reaction for the other also. We call this an "ekphoric influence," and stimuli having this character are called "ekphoric stimuli." In such a case we call the engrams of the two…
Bertrand Russell, The Analysis of Mind
States what Field-effect transistor is.
Related ideas
- World Scientific
- Integrated circuit
- Relay
- Transistor
- Johns Hopkins University Press
- MOSFET
- Elsevier
- Nature (journal)
- CMOS
- Wiley (publisher)
- Cambridge University Press
- Electron
Place in the tradition
Part of Logic gate.