| US 7,484,109 B2 | ||
| Computer volatile memory power backup system | ||
| Daniel Feldman, Forest Hills, N.Y. (US); Arkadiy Peker, New Hyde Park, N.Y. (US); Dror Korcharz, Bat Yam (Israel); Simon Kahn, Jerusalem (Israel); Ilan Atias, Haifa (Israel); and Mohamad A. Saleh, Framingham, Mass. (US) | ||
| Assigned to Microsemi Corp. - Analog Mixed Signal Group Ltd., Hod Hasharon (Israel) | ||
| Filed on Sep. 12, 2005, as Appl. No. 11/223,030. | ||
| Claims priority of provisional application 60/666575, filed on Mar. 31, 2005. | ||
| Claims priority of provisional application 60/690137, filed on Jun. 14, 2005. | ||
| Prior Publication US 2006/0224907 A1, Oct. 05, 2006 | ||
| Int. Cl. G06F 1/26 (2006.01) | ||
| U.S. Cl. 713—300 [713/323; 714/14] | 37 Claims |
| 1. A system for placing and maintaining a computer in a standby mode during power failure, said system comprising:
a means for sensing a failure of mains power;
a powered device controller comprising a maintain power signature functionality, said powered device controller arranged to
receive power over communication cabling, said maintain power signature functionality operative to ensure that at all times
sufficient power is drawn via said communication cabling so that power is not disconnected, said powered device controller
operative to provide a standby power for the computer derived from said power received over communication cabling, said provided
standby power less than the power required for full operation of the computer;
a volatile memory arranged to be powered from said powered device controller; and
a processor,
said processor being operative responsive to said means for sensing a failure to store status information on said volatile
memory and reduce power demand of the computer to be no more than said standby power available from said powered device controller.
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