Portable electric device with power failure recovery and operation method thereof
US7127228B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 7, 2001 |
| Grant date | Oct 24, 2006 |
| Priority date | — |
| Expiry date | May 20, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F1/30
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A portable electronic device with power failure recovery, powered by a main power source, the device comprising a power detection module, a processor, a timing unit and a power management unit. The power detection module detects an output characteristic from the main power source and asserts an interrupt signal if the characteristic is below a threshold value. The processor asserts a turn-off signal and an enable signal in response to the interrupt signal. The timing unit asserts a notification signal at a predetermined time interval when the enable signal is asserted. Upon receipt of the turn-off signal, the power management unit disconnects the main power source from a circuit block. Moreover, the power management unit reconnects the main power source to the circuit block when the notification signal is asserted and the output characteristic of the main power source is beyond the threshold value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.