Trigger circuit for a power fet having a source-side load

Details Trigger circuit for a power fet having a source-side load Trigger circuit for a power fet having a source-side load

1997-08-06

1999-06-22

Wells, Kenneth B.

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Current driver

327432, 327434, H03K 19094

Patent

active

059146192

ABSTRACT:
A circuit configuration for driving or triggering a power FET connected in series with a load on the source side and coupled to a supply voltage terminal on the drain side, includes a charge pump supplying an output signal fed to a gate terminal of the power FET, a depletion-mode FET having a load path through which a gate-source capacitance of the power FET can be discharged, a device for driving or triggering the charge pump and the depletion-mode FET, and a further device for pulling the source of the depletion-mode FET in the direction of the supply voltage, as a function of the drive or trigger signal.

REFERENCES:
patent: 4859875 (1989-08-01), Tihanyi et al.
patent: 5352932 (1994-10-01), Tihanyi

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