Magnetoresistive sensor magnetically biased in a region spaced f

Details Magnetoresistive sensor magnetically biased in a region spaced f Magnetoresistive sensor magnetically biased in a region spaced f

1997-08-08

1999-11-09

Snow, Walter E.

Electricity: measuring and testing

Magnetic

Magnetometers

324235, 338 32R, 360113, G11B 5127, G11B 539, G01R 3302, G01N 2772

Patent

active

059821779

ABSTRACT:
A magnetic sensor for detecting the presence of a magnetic sample proximate a sensing region. A magnetoresistive element is positioned in a biasing region of the sensor which is spaced apart from the sensing region. A magnetic circuit provides a magnetic field to the sensing region and the biasing region. The magnetic field biases the magnetoresistive element positioned in the biasing region. A circuit detects changes in the magnetic field in the biasing region as a function of changes in the resistance of the magnetoresistive element whereby changes in the magnetic field caused by the presence of a magnetic sample proximate the sensing region are detected.

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