Thyristor trigger circuit enabled by thyristor forward voltage l

Details Thyristor trigger circuit enabled by thyristor forward voltage l Thyristor trigger circuit enabled by thyristor forward voltage l

1975-07-01

1976-08-03

Zazworsky, John

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307252Q, 307305, 307318, 321 27R, 323 22SC, H03K 1772

Patent

active

039731448

ABSTRACT:
A circuit for triggering a silicon controlled rectifier (SCR) when the voltage across the SCR has a predetermined polarity and exceeds a predetermined magnitude. The anode of a zener diode is connected to the SCR cathode and a resistor is connected between the SCR anode and the zener diode cathode. The voltage at the zener diode cathode acts as a bias for the trigger signal. A silicon unilateral switch responds to the biased trigger signal to trigger the SCR into the conductive state when the biased trigger signal level exceeds the switching voltage of the silicon unilateral switch.

REFERENCES:
patent: 3241043 (1966-03-01), Clarke

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