Intelligent low battery detection circuit for a paging receiver
US5696437A · kind A · utility
18Cited by
5References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 18, 1993 |
| Grant date | Dec 9, 1997 |
| Priority date | — |
| Expiry date | Aug 18, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S320/21
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A low battery condition is determined by sampling battery terminal voltage with a voltage comparator under light and heavy loading, and indicating a low battery condition when the rate of change of the sampled voltage or the rate of change of the internal resistance of the battery is greater than a predetermined limit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.