Circuit for the fast turn off of a field effect transistor

Details Circuit for the fast turn off of a field effect transistor Circuit for the fast turn off of a field effect transistor

1992-04-28

1994-05-17

Sikes, William L.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307246, 307282, 307570, 307572, H03K 301, H03K 1756, H03K 330, H03K 1760

Patent

active

053131096

ABSTRACT:
A circuit for the fast turn off of a field effect transistor (FET) for use in circuits such as a power converter circuit. The FET turn off circuitry includes a gate current sink transistor and a capacitor linked between the base of the gate current sink transistor and the drain of the FET. This capacitor increases the current into the base of the gate current sink transistor, and enables an increased magnitude of current to flow from the FET, thereby increasing the speed with which the FET turns off. A diode is preferably also connected between the base and the emitter of the gate current sink transistor to provide a return path to discharge the capacitor.

REFERENCES:
patent: 4100435 (1978-07-01), Komuro
patent: 4461966 (1984-07-01), Hebenstreit
patent: 4899065 (1990-02-01), Nakamura
patent: 4903182 (1990-02-01), Pilukaitis et al.
patent: 5180930 (1993-01-01), Mayes

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