Isolated gate drive

Details Isolated gate drive Isolated gate drive

1993-03-29

1995-11-21

Heyman, John S.

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Particular stable state circuit

327191, 327109, 327108, H03K 316

Patent

active

054690986

ABSTRACT:
A drive circuit for use in UPS and like devices, designed to derive high-level switching signals from low-level logic signals. The drive circuit has an input circuit which drives the primary of an air-core transformer, the input drive circuit having an oscillator with a resonant circuit producing a carrier at a carrier frequency, the resonant circuit including the primary of the transformer and a coupling circuit for coupling the logic signals to the oscillator so as to modulate the carrier signal. The use of the resonant circuit enables generation of sufficient magnetization current for the low-cost transformer while reducing the current drive required of the input drive circuit, thereby enabling a reduced cost gate drive circuit.

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patent: 4803453 (1989-02-01), Tomono
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