Regulator for reducing power supply transient voltages

Details Regulator for reducing power supply transient voltages Regulator for reducing power supply transient voltages

2005-08-17

2008-10-21

Perveen, Rehana (Department: 2116)

Electrical computers and digital processing systems: support

Computer power control

C713S310000, C713S320000, C713S340000

Reexamination Certificate

active

07441129

ABSTRACT:
A regulator for reducing transient voltages at a power supply output includes a switch connected between ground and the power supply output and a comparator for controlling the opening/closing of the switch. The comparator includes an input for sensing a power supply output voltage and an input for receiving a reference voltage. When the output voltage exceeds the reference voltage by a threshold, for example, the comparator operates to close the switch, shunting excess energy in the power supply to ground and reducing the output voltage. As the output voltage returns to within the threshold of the reference voltage, for example, the comparator operates to open the switch, permitting the power supply to resume normal operation. The power supply may power a microprocessor that is susceptible to voltage transients that occur as the processor power demands change. The regulator compensates for these transients and maintains the power supply output voltage within desired specifications.

REFERENCES:
patent: 5212616 (1993-05-01), Dhong et al.
patent: 5379174 (1995-01-01), Kasamoto
patent: 5691870 (1997-11-01), Gebara
patent: 5926394 (1999-07-01), Nguyen et al.
patent: 6472899 (2002-10-01), Osburn et al.
patent: H11-134069 (1999-05-01), None
patent: 2002-135968 (2002-05-01), None
patent: WO 2004/062072 (2004-07-01), None
Official Letter in corresponding Japanese Patent Application No. 2005-236,221 (English translation). Date not known.

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