Trigger circuit for a thyristor

Details Trigger circuit for a thyristor Trigger circuit for a thyristor

1978-03-28

1980-12-16

Zazworsky, John

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307305, H03K 1772

Patent

active

042399858

ABSTRACT:
A trigger circuit for a thyristor comprising at least one of each of an NPN transistor and a PNP transistor and a PNPN switch to trigger a 4-terminal thyristor by feeding a collector current of the PNP transistor into a cathode gate of the thyristor and by taking out a collector current of the NPN transistor from an anode gate of the thyristor. An emitter of the PNP transistor is connected to a power supply through a resistor, and a cathode and an anode of the PNPN switch is connected to a base of the PNP transistor and a base of the NPN transistor, respectively. By controlling the on-off operation of the PNPN switch, the thyristor is selectively triggered, so that the trigger circuit can be operated by a single low voltage supply and does not require any separate circuit for holding a conducting state of the thyristor.

REFERENCES:
patent: 4002946 (1977-01-01), Liang

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