Power transistor switching circuit

Details Power transistor switching circuit Power transistor switching circuit

1975-08-18

1977-05-17

Beha, Jr., William H.

321 18, H02P 1318

Patent

active

040244504

ABSTRACT:
A circuit employing a transformer secondary winding having a fraction of its turns tapped across the base-emitter junction of a power transistor. A silicon controlled rectifier is connected from the transistor base across the entire secondary winding providing control of the power transistor conduction and reverse base drive upon power transistor turn-off. Synchronous control signals for the controlled rectifier may be developed by an additional secondary winding wrapped on the same core as the secondary winding driving the power transistor.

REFERENCES:
patent: 3660750 (1972-05-01), Bullinga
patent: 3670234 (1972-06-01), Joyce
patent: 3863131 (1975-01-01), Muir
patent: 3909695 (1975-09-01), Peck
patent: 3916282 (1975-10-01), Rothermal

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