System and method for conserving power within a backup battery device
US5784629A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 24, 1996 |
| Grant date | Jul 21, 1998 |
| Priority date | — |
| Expiry date | Sep 24, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F1/30
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A system and method for conserving power within a backup battery device comprises a main battery for generating a main operating voltage and a secondary operating voltage, a switching device for connecting the main operating voltage to a secondary power bus which powers a memory device, and a power manager for sensing whenever the main battery drops to a first threshold voltage, whereupon the power manager connects the secondary operating voltage to the secondary power bus if the memory device contains data, and disconnects the main operating voltage from the secondary power bus. The backup battery generates the secondary operating voltage whenever the power manager senses that the main battery has reached a second threshold voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.