Power supply for real-time clock generation

Details Power supply for real-time clock generation Power supply for real-time clock generation

2007-04-18

2010-06-01

Paladini, Albert W (Department: 2836)

Electrical transmission or interconnection systems

Plural supply circuits or sources

Substitute or emergency source

C307S086000, C307S154000

Reexamination Certificate

active

07728459

ABSTRACT:
A power supply. The power supply provides power to a real-time clock generator when system power is not available and comprises first and second regulators, an energy storage device, and a switch. The first regulator receives a system power and generates a first regulated voltage when the system power is available. The energy storage device is coupled to a node. The second regulator comprises an input coupled to the node and provides a second regulated voltage to a real-time clock generator. The switch is coupled between the first regulator and the node. The switch is turned on when the system power is available and turned off when the system power is not available.

REFERENCES:
patent: 5905365 (1999-05-01), Yeh
patent: 6016019 (2000-01-01), Wojewoda
patent: 6603365 (2003-08-01), Dotzler et al.
patent: 6892147 (2005-05-01), Bui et al.
patent: 2006/0082351 (2006-04-01), Martins et al.

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