Circuit arrangement for reducing the recovery time of a thyristo

Details Circuit arrangement for reducing the recovery time of a thyristo Circuit arrangement for reducing the recovery time of a thyristo

1981-05-15

1982-09-28

Clawson, Jr., Joseph E.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307252C, 307252J, 307305, 307317A, 307318, 357 15, 357 38, H03K 1760

Patent

active

043520286

ABSTRACT:
Circuit arrangement for reducing recovery time of a thyristor formed with a semiconductor body having at least one emitter zone contacted by an emitter electrode and having at least one auxiliary emitter zone and a base zone contacted by an auxiliary emitter electrode, includes a shunt between the emitter zone and the base zone, a capacitor disposed in a line mutually connecting the emitter electrode and the auxiliary emitter electrode, the emitter electrode being the cathode and being disposed on the surface of the semiconductor body and electrically connected to the emitter zone, the shunt between the emitter zone and the base zone being formed through the capacitor, a series connection of a resistance and a diode being connected in parallel with the capacitor, the diode having a lower threshold voltage than that of an imputed diode formed by the cathode-sided emitter zone and the base zone of the thyristor, the diode of the series connection being poled with respect to the cathodic emitter electrode in the same sense as is the imputed diode of the thyristor.

REFERENCES:
patent: 3590346 (1971-06-01), Bilo et al.
patent: 4012664 (1977-03-01), Dietrich et al.
patent: 4054893 (1977-10-01), Hutson
patent: 4109632 (1978-08-01), Brooks
patent: 4110638 (1978-08-01), Voss
patent: 4110775 (1978-08-01), Festa
patent: 4117393 (1978-09-01), Buck
patent: 4203047 (1980-05-01), Seki

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