Power transistor actuating and bootstrap drive circuit

Details Power transistor actuating and bootstrap drive circuit Power transistor actuating and bootstrap drive circuit

1978-01-27

1980-05-06

Miller, Jr., Stanley D.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307282, 307300, H03K 100

Patent

active

042019281

ABSTRACT:
A drive circuit for a power switching transistor, in which an actuating circuit provides a low level gating current to actuate and maintain the transistor in a conductive state, and a bootstrap drive circuit is provided to enable operation over the full load range of the transistor with minimal input power loss. Rapid turn-off is facilitated by means of a deactuating transistor which connects the base of the switching transistor to a negative pull-down voltage level, and which also diverts gating current away from the switching transistor. A shunt circuit is provided in association with the bootstrap circuit to prevent saturation of relatively high gain switching transistors.

REFERENCES:
patent: 3852620 (1974-12-01), Milberger et al.
patent: 3986052 (1976-10-01), Hunter
patent: 3999086 (1976-12-01), Ekelund
patent: 4123670 (1978-10-01), Pollmeier

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