Miscellaneous active electrical nonlinear devices – circuits – and – Gating – Utilizing three or more electrode solid-state device
Patent
1996-02-20
1997-02-11
Callahan, Timothy P.
Miscellaneous active electrical nonlinear devices, circuits, and
Gating
Utilizing three or more electrode solid-state device
327376, 327377, 327421, 327432, 327365, 327389, 327442, H03K 17687
Patent
active
056025050
ABSTRACT:
In one aspect of the present invention a gate drive circuit is disclosed. The gate drive circuit includes a high voltage and low voltage energy source, a power transistor, a switching transistor, and a charging capacitor. The charging capacitor stores energy from the low voltage energy source. The gate drive circuit further includes a circuit that biases the switching transistor OFF which causes the low voltage energy stored in the capacitor to bias the power transistor ON to transfer high voltage energy to the load. The circuit additionally biases the switching transistor ON which biases the power transistor OFF to block the transfer of high voltage energy. Finally, a protection device is included to limit the power transistor voltage to a maximum voltage level in response to the power transistor being biased ON.
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Callahan Timothy P.
Caterpillar Inc.
Le Dinh T.
Masterson David M.
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