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An MOS-controlled thyristor (MCT) is a voltage-controlled fully controllable 
Positive voltage on the gate terminal with respect to the cathode turns the thyristor to the on state.
Negative voltage on the gate terminal with respect to the anode, which is close to cathode voltage during the on state, turns the thyristor to the off state.
MCTs were commercialized only briefly.
Field-effect-controlled thyristor
* "MOS GTO—A Turn Off Thyristor with MOS-Controlled Emitter Shorts," IEDM 85, M. Stoisiek and H. Strack, Siemens AG, Munich FRG pp. 158–161. * "MOS-Controlled Thyristors—A New Class of Power Devices", IEEE Transactions on Electron Devices, Vol. ED-33, No. 10, Oct. 1986, Victor A. K. Temple, pp. 1609 through 1618.
An MOS-controlled thyristor (MCT) is a voltage-controlled fully controllable thyristor
A thyristor () is a solid-state semiconductor device with four layers of alternating P- and N-type materials used for high-power applications. It acts exclusively as a bistable switch (or a latch), conducting when the gate receives a current ...
, controlled by MOSFET
The metal–oxide–semiconductor field-effect transistor (MOSFET, MOS-FET, or MOS FET) is a type of field-effect transistor (FET), most commonly fabricated by the controlled oxidation of silicon. It has an insulated gate, the voltage of which d ...
s (metal-oxide-semiconductor field-effect transistors). It was invented by V.A.K. Temple in 1984, and was principally similar to the earlier insulated-gate bipolar transistor
An insulated-gate bipolar transistor (IGBT) is a three-terminal power semiconductor device primarily used as an electronic switch, which, as it was developed, came to combine high efficiency and fast switching. It consists of four alternating lay ...
(IGBT).V.A.K. Temple, "MOS-Controlled Thyristors, IEEE Electron Devices Meeting, Abstract 10.7, pp.282-285, 1984. MCTs are similar in operation to GTO thyristors, but have voltage controlled insulated gates. They have two MOSFETs of opposite conductivity types in their equivalent circuits. One is responsible for turn-on and the other for turn-off. A thyristor with only one MOSFET in its equivalent circuit, which can only be turned on (like normal SCRs), is called an MOS-gated thyristor.
Positive voltage on the gate terminal with respect to the cathode turns the thyristor to the on state.
Negative voltage on the gate terminal with respect to the anode, which is close to cathode voltage during the on state, turns the thyristor to the off state.
MCTs were commercialized only briefly.
External links
Field-effect-controlled thyristor
* "MOS GTO—A Turn Off Thyristor with MOS-Controlled Emitter Shorts," IEDM 85, M. Stoisiek and H. Strack, Siemens AG, Munich FRG pp. 158–161. * "MOS-Controlled Thyristors—A New Class of Power Devices", IEEE Transactions on Electron Devices, Vol. ED-33, No. 10, Oct. 1986, Victor A. K. Temple, pp. 1609 through 1618.
References
Thyristor
A thyristor () is a solid-state semiconductor device with four layers of alternating P- and N-type materials used for high-power applications. It acts exclusively as a bistable switch (or a latch), conducting when the gate receives a current ...
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