High current range magnetoresistive-based current sensor
US8952686B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 25, 2011 |
| Grant date | Feb 10, 2015 |
| Priority date | — |
| Expiry date | Jun 26, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/12
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A system includes a magnetoresistive (MR) bridge circuit, a magnetic field sensor, and an adjustable load. The MR bridge circuit receives a supply voltage and generates an output voltage that indicates a strength/direction of a magnetic field. The MR bridge circuit includes first and second MR elements connected in series between a supply node and a ground node, and third and fourth MR elements connected in series between the supply node and the ground node. The output voltage is generated between a first node that is common to the first and second MR elements and a second node that is common to the third and fourth MR elements. The sensor generates signals based on the strength/direction of the magnetic field. The adjustable load is connected in parallel with one of the MR elements, and has a resistance that is controlled based on the signals generated by the sensor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.