Electric field modulated MR sensor
US5825593A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 18, 1994 |
| Grant date | Oct 20, 1998 |
| Priority date | — |
| Expiry date | Feb 18, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K17/97
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An apparatus for sensing a change in a magnetic field is disclosed. The apparatus includes a giant magnetoresistive element positioned adjacent to the magnetic field. First, second, and third electrical contacts are spatially positioned on the giant magnetoresistive element forming a first current path having a first variable resistance between the first and second electrical contacts and a second current path having a second variable resistance between the first and third electrical contacts. The movable magnetic field causes a change in the first variable resistance in the first current path when the field becomes positioned substantially underneath the first current path, and the magnetic field causes a change in the second variable resistance in the second current path when the field becomes positioned substantially underneath the second current path.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.