Wake-up circuit and methodology for reducing false wake-up events
US11194379B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 30, 2020 |
| Grant date | Dec 7, 2021 |
| Priority date | — |
| Expiry date | Jul 30, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F1/28
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A wake-up circuit and method are provided for detecting and preventing false positive wake-up events in an electronic device in a sleep mode. Methodology entails producing first, second, and third sensor signals at successive first, second, and third instants in time in response to a physical stimulus detected by a sensor of the wake-up circuit. The first sensor signal is selected to be a reference value. A first difference value is determined between the second sensor signal land the reference value, a second difference value is determined between the third sensor signal and the reference value, and communication of a wake-up signal to the electronic device is prevented when at least one of the first and second difference values fails to exceed a threshold value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.