Other sources define thyristors as a larger circle of devices with at least four layers of alternating N and P-type material, including:[2][3]
ti realizeled rectifier (SCR)
Gate turn-off thyristor (GTO)
Triode AC switch (TRIAC)
Static Induction transistor/Thyristor (SIT/SITh)
MOS Controlled Thyristor (MCT)
Distributed Buffer - Gate Turn-off Thyristor (DB-GTO)
Integrated gate commutated thyristor (IGCT)
MOS composite unruffled induction thyristor/CSMT
Reverse conducting thyristor
Function
The thyristor is a four-layer, three terminal conductive device, with each layer consisting of alternately N-type or P-type material, for example P-N-P-N. The primary(prenominal) terminals, labeled anode and cathode, are across the full four layers, and the control terminal, called the gate, is attached to p-type material near to the cathode. (A variant called an SCSâ€"Silicon Controlled careenâ€"brings all four layers out to terminals.
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The operation of a thyristor give notice be understood in terms of a agree of tightly coupled bipolar junction transistors, arranged to take in the self-latching action:
Thyristors have three states:
1.Reverse blocking mood â€" potential is applied in the direction that would be obstruct by a diode
2.Forward blocking mode â€" Voltage is applied in the direction that would cause a diode to conduct, but the thyristor has not yet been triggered into conduction
3.Forward conducting mode â€" The thyristor has been triggered into conduction and will remain conducting until the forward current drops below a threshold value known as the holding current
Switching characteristics
In a conventional thyristor, once it has been switched on by the...If you want to get a full essay, prepare it on our website: Orderessay
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