Power indication circuit and power indication method
US11476687B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 26, 2020 |
| Grant date | Oct 18, 2022 |
| Priority date | — |
| Expiry date | Jan 13, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/388
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A power indication circuit for indicating different power levels of a battery, can include: N LED indicators; N setting resistors; N multifunction ports; a drive circuit coupled to the N multifunction ports and the battery, and being configured to acquire N threshold voltage signals in accordance with voltages at the N multifunction ports during a first time period of an operation cycle, and to generate N comparison signals in accordance with the N threshold voltage signals and a voltage detection signal generated by detecting a voltage of the battery, in order to drive the N LED indicators in accordance with the N comparison signals during a second time period of the operation cycle; and where each of the N setting resistors coupled in parallel to a corresponding one of the N LED indicators is respectively coupled to a corresponding one of the N multifunction ports.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.