Magnetic field sensor with skewed sense magnetization of sense layer
US9739842B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 26, 2016 |
| Grant date | Aug 22, 2017 |
| Priority date | — |
| Expiry date | Mar 11, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/098
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A magnetic field sensor comprises a sensor bridge having multiple sensor legs. Each sensor leg includes magnetoresistive sense elements, each comprising a pinned layer having a reference magnetization parallel to a plane of the sensor and a sense layer having a sense magnetization that is skewed away from three orthogonal axes. The sense magnetization of a portion of the sense elements is oriented in a first direction and the sense magnetization of a different portion of the sense elements is magnetically biased in a second direction by a permanent magnet layer. The second direction differs from the first direction by an opposing angular magnitude to yield a balanced sensor bridge that produces a zero-offset outcome in the absence of an external magnetic field.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.