AC-to-DC voltage regulator

Details AC-to-DC voltage regulator AC-to-DC voltage regulator

2006-06-30

2009-08-11

Laxton, Gary L (Department: 2838)

Electricity: power supply or regulation systems

Input level responsive

Using a linearly acting final control device

C323S276000

Reexamination Certificate

active

07573251

ABSTRACT:
The present invention provides a high efficiency voltage regulator. It includes an input transistor coupled to a voltage source to provide a supply voltage. A detection circuit is coupled to the voltage source and the supply voltage to generate a control signal and an enable signal in response to voltage levels of the voltage source and the supply voltage. A charge pump circuit is coupled to the detection circuit and the input transistor to turn on the input transistor in response to the control signal. A control transistor is connected to the detection circuit and the input transistor to turn off the input transistor in response to the control signal.

REFERENCES:
patent: 5117178 (1992-05-01), Roth
patent: 5321313 (1994-06-01), Oberhauser
patent: 7088083 (2006-08-01), Ishii
patent: 7129759 (2006-10-01), Fukami
patent: 7219022 (2007-05-01), Wekhande

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