Planar hall effect sensors
US10921389B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jun 27, 2018 |
| Grant date | Feb 16, 2021 |
| Priority date | — |
| Expiry date | Nov 15, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10N52/80
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A planar Hall effect (PHE) sensor for measuring at an external magnetic field includes a plurality of elongated magnetic regions. Each magnetic region includes a ferromagnetic material that is magnetized along a longitudinal axis. The magnetic regions cross one another at an overlap region that is characterized by a plurality of easy magnetic axes. At least two pairs of electrical leads are each aligned along one of the easy magnetic axes. A current source may be connected to a first pair of the electrical leads to cause a current to flow through the overlap region along a first easy magnetic axis. A voltage measurement device may be connected to another pair of the electrical leads to measure a PHE voltage that is generated by a component of the external magnetic field that is perpendicular to the easy magnetic axis along which the overlap region is magnetized.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.