Low power ring detect for computer system wake-up
US5689715A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 17, 1996 |
| Grant date | Nov 18, 1997 |
| Priority date | — |
| Expiry date | Oct 17, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F1/3209
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A computer system having a CPU, a power management processor, a modem, and a power supply in circuit communication. The power management processor controls the regulation of power to the CPU by the power supply. Responsive to a ring signal having a frequency in a predetermined range being detected by the power management processor, the power management processor causes the power supply to provide regulated power to the computer system. Thereafter, the CPU confirms that a ring signal was present by querying the modem whether the modem also detected a ring. If so, the system remains powered. If not, the CPU causes the power management controller to cause the power supply to cease providing regulated power.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.