Battery voltage detecting circuit
US7663375B2 · kind B2 · utility
Assignees
Inventor
Key dates
| Filing date | Sep 2, 2008 |
| Grant date | Feb 16, 2010 |
| Priority date | — |
| Expiry date | Sep 2, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/396
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A battery voltage detecting circuit includes: a first capacitor having one end connected to one input terminal of an operational amplifier; a second capacitor having one end connected to an output terminal of the operational amplifier and the other end connected to the one input terminal of the operational amplifier; a third capacitor having one end connected to the other input terminal of the operational amplifier; a fourth capacitor having one end applied with a reference voltage and the other end connected to the other input terminal of the operational amplifier; and a switching circuit configured to electrically connect the one input terminal of the operational amplifier to the one end of the first capacitor after the transient current has stopped flowing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.