Drive circuit for two switching converter stages in a...

Electricity: power supply or regulation systems – Output level responsive – Using a three or more terminal semiconductive device as the...

Reexamination Certificate

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Reexamination Certificate

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07342385

ABSTRACT:
A drive circuit is disclosed including a first feedback circuit designed to generate a first feedback signal from a first voltage to be controlled and a first reference voltage. The drive circuit further includes a signal converter designed to generate a second feedback signal from the first feedback signal such that the difference between the first feedback signal and a first amplitude value of a periodic signal approximately matches the difference between the second feedback signal and a second amplitude value of the periodic signal. The drive circuit also includes a first pulse width modulator which receives the first feedback signal and the periodic signal and generates the first pulse width-modulated signal. In addition the drive circuit includes a second pulse width modulator which receives the second feedback signal and the periodic signal and generates the second pulse width-modulated signal.

REFERENCES:
patent: 5638264 (1997-06-01), Hayashi et al.
patent: 5808453 (1998-09-01), Lee et al.
patent: 1079508 (2001-02-01), None
patent: 2012 501 (1979-07-01), None
patent: 2000 156 970 (2000-06-01), None
patent: WO 02/19507 (2002-03-01), None
Tarter, Ralph E.Solid-State Power Conversion Handbook. New York: John Wiley & Sons, Inc. 1993 (p. 362).

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