Drive circuit for power switching device

Details Drive circuit for power switching device Drive circuit for power switching device

1975-05-29

1976-09-28

Miller, Jr., Stanley D.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307254, 307314, 307300, H03K 1700

Patent

active

039834182

ABSTRACT:
A transformer-coupled transistor base drive circuit is disclosed wherein the transformer primary control circuit includes a switching transistor, a bias supply, and a RC biasing network arrangement. The biasing arrangement is designed to ensure that the transformer core will never enter the positive saturation region of its hysteresis characteristic; regardless of variations in the power transistor duty cycle. The base drive circuit also features provision of high sweep-out current in the power transistor base during turn-off, reverse base-emitter voltage during the power transistor off state, and regenerative current drive to minimize storage time and to control the bias power drain.

REFERENCES:
patent: 3131327 (1964-04-01), Quinn
patent: 3757144 (1973-09-01), Hetterscheid et al.
patent: 3805094 (1974-04-01), Orlando

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