Temperature resistant magnetoresistance sensing device
US5877626A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 28, 1996 |
| Grant date | Mar 2, 1999 |
| Priority date | — |
| Expiry date | Oct 28, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V3/08
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention provides a sensing device capable of outputting a correct signal precisely corresponding to a particular position (angle) such as a protruding or recessed portion of a rotating member made of a magnetic material over the entire operating temperature range regardless of the temperature coefficient of the magnetic field sensing element. The sensing device includes: a magnet for generating a magnetic field; a rotary member of magnetic material for changing the magnetic field generated by the magnet, the rotary member being disposed at a predetermined distance apart from the magnet; a giant magnetoresistance device which changes in resistance in response to the magnetic field whose magnitude is changed by the rotary member of magnetic material; and an AC coupling circuit for performing an AC coupling process on the output of signal of the giant magnetoresistance device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.