Current sensing circuit
US7050914B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 22, 2004 |
| Grant date | May 23, 2006 |
| Priority date | — |
| Expiry date | Nov 3, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R19/0092
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A voltage detection unit generates a detection voltage signal representative of a potential difference caused by a current to be detected. A reference current generation unit generates a first reference current and a second reference current having a linear relationship therebetween. In response to the detection voltage signal and the first reference current, a transfer unit determines a first operation voltage. Furthermore, the transfer unit determines a second operation voltage and a transfer current in response to the first operation voltage and the second reference current. The second operation voltage is substantially equal to the first operation voltage. A detection current signal having a linear relationship with the current to be detected is generated through subtracting at least the second reference current from the transfer current.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.