About: Depletion and enhancement modes

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In field-effect transistors (FETs), depletion mode and enhancement mode are two major transistor types, corresponding to whether the transistor is in an on state or an off state at zero gate–source voltage. The mode can be determined by the sign of the threshold voltage (gate voltage relative to source voltage at the point where an inversion layer just forms in the channel): for an N-type FET, enhancement-mode devices have positive thresholds, and depletion-mode devices have negative thresholds; for a P-type FET, enhancement-mode have negative, and depletion-mode have positive.

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rdf:type	mean of transportation
rdfs:label	Mode d'esgotament i mode de millora (ca) Depletion and enhancement modes (en)
rdfs:comment	In field-effect transistors (FETs), depletion mode and enhancement mode are two major transistor types, corresponding to whether the transistor is in an on state or an off state at zero gate–source voltage. The mode can be determined by the sign of the threshold voltage (gate voltage relative to source voltage at the point where an inversion layer just forms in the channel): for an N-type FET, enhancement-mode devices have positive thresholds, and depletion-mode devices have negative thresholds; for a P-type FET, enhancement-mode have negative, and depletion-mode have positive. (en)
foaf:depiction
dcterms:subject	MOSFETs Transistor types
Wikipage page ID	30925675 (xsd:integer)
Wikipage revision ID	1104719985 (xsd:integer)
Link from a Wikipage to another Wikipage	Bell Labs Dawon Kahng VLSI Depletion-load NMOS logic JFET Power–delay product RCA Laboratories Gallium arsenide Mohamed M. Atalla MOSFET Zilog Z80 PMOS logic MOSFETs Four-phase logic Germanium Transistor types Field-effect transistor Westinghouse Electric Indium arsenide Intel 4004 Semiconductor device Silicon Dynamic logic (digital logic) Thin-film transistors
sameAs	Depletion and enhancement modes Depletion and enhancement modes Depletion and enhancement modes Depletion and enhancement modes
dbp:wikiPageUsesTemplate	dbt:Legend dbt:Reflist dbt:Short_description dbt:Sub
thumbnail	wiki-commons:Special:FilePath/FET_comparison.png?width=300
has abstract	In field-effect transistors (FETs), depletion mode and enhancement mode are two major transistor types, corresponding to whether the transistor is in an on state or an off state at zero gate–source voltage. Enhancement-mode MOSFETs (metal–oxide–semiconductor FETs) are the common switching elements in most integrated circuits. These devices are off at zero gate–source voltage. NMOS can be turned on by pulling the gate voltage higher than the source voltage, PMOS can be turned on by pulling the gate voltage lower than the source voltage. In most circuits, this means pulling an enhancement-mode MOSFET's gate voltage towards its drain voltage turns it on. In a depletion-mode MOSFET, the device is normally on at zero gate–source voltage. Such devices are used as load "resistors" in logic circuits (in depletion-load NMOS logic, for example). For N-type depletion-load devices, the threshold voltage might be about −3 V, so it could be turned off by pulling the gate 3 V negative (the drain, by comparison, is more positive than the source in NMOS). In PMOS, the polarities are reversed. The mode can be determined by the sign of the threshold voltage (gate voltage relative to source voltage at the point where an inversion layer just forms in the channel): for an N-type FET, enhancement-mode devices have positive thresholds, and depletion-mode devices have negative thresholds; for a P-type FET, enhancement-mode have negative, and depletion-mode have positive. Junction field-effect transistors (JFETs) are depletion-mode, since the gate junction would forward bias if the gate were taken more than a little from source toward drain voltage. Such devices are used in gallium arsenide and germanium chips, where it is difficult to make an oxide insulator. (en)
gold:hypernym	Types
prov:wasDerivedFrom	wikipedia-en:Depletion_and_enhancement_modes?oldid=1104719985&ns=0
page length (characters) of wiki page	7781 (xsd:nonNegativeInteger)
foaf:isPrimaryTopicOf	wikipedia-en:Depletion_and_enhancement_modes
is Link from a Wikipage to another Wikipage of	Charge-coupled device Depletion-load NMOS logic General Instrument CP1600 Organic electrochemical transistor MOSFET Depletion-type Depletion type Thin-film transistor Enhancement-type Enhancement type Enhancement-mode Enhancement and depletion modes Enhancement mode Intel 8080 Depletion-mode Depletion mode
is Wikipage redirect of	Depletion-type Depletion type Enhancement-type Enhancement type Enhancement-mode Enhancement and depletion modes Enhancement mode Depletion-mode Depletion mode
is foaf:primaryTopic of	wikipedia-en:Depletion_and_enhancement_modes

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