Power conservation system for a modem in a computer system
US5588054A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 20, 1995 |
| Grant date | Dec 24, 1996 |
| Priority date | — |
| Expiry date | Apr 20, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M11/06
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A power conservation system for a modem in a computer system having a primary power supply and an auxiliary power supply, including a ring detect circuit coupled to a telephone ring signal line for generating a ring detect signal in response to detection of a ring signal on the telephone ring signal line, a power management system having an input coupled to the ring detect circuit and an output coupled to the primary power supply, the power management system being responsive to the ring detect signal for switching the primary power supply from a first level corresponding to a power conservation mode of operation of the computer system to a second level corresponding to a normal mode of operation, wherein the auxiliary power supply is coupled to the ring detect circuit for supplying power thereto when the computer system is in the power conservation mode of operation, whereby the ring detect circuit is maintained in an active state even during the power conservation mode of operation of the computer system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.