Magneto-resistive magnetic field sensor with pole pieces and increased sensitivity
US5696447A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 14, 1994 |
| Grant date | Dec 9, 1997 |
| Priority date | — |
| Expiry date | Dec 14, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/09
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention concerns a magneto-resistive magnetic sensor comprising a magneto-resistive element, the resistance of which varies as a function of the applied magnetic field and two pole pieces that collect the magnetic field to be detected so as to concentrate it in the magneto-resistive element, each pole piece being positioned to partially overlap the magneto-resistive element, a current I passing through this magneto-resistive element, wherein the zones of the magneto-resistive element that are overlapped by pole pieces are cut out such that the current that passes through the magneto-resistive element is located in a zone in the air gap between the two pole pieces.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.