Electrical resistors – Resistance value responsive to a condition – Magnetic field or compass
Reexamination Certificate
2006-02-28
2006-02-28
Easthom, Karl D. (Department: 2832)
Electrical resistors
Resistance value responsive to a condition
Magnetic field or compass
C324S252000
Reexamination Certificate
active
07005958
ABSTRACT:
A two-axis magnetic field sensor includes a substrate, a first sensor having at least one magnetoresistive element formed of GMR material on the substrate has a free layer having an easy axis of effective anisotropy field in a first direction. The first sensor is sensitive to magnetic field components perpendicular to the first direction. A current is caused to flow through the first sensor and variations in the resistivity of the first sensor due to the first magnetic field components are sensed. A second sensor having at least one magnetoresistive element formed of GMR material on the substrate has a free layer having an easy axis of effective anisotropy field in a direction substantially perpendicular to the first direction. The second sensor is sensitive to second magnetic field components perpendicular to its easy axis of effective anisotropy. A current is caused to flow through the second sensor and variations in the resistivity of the second sensor due to second magnetic field components are sensed.
REFERENCES:
patent: 4949039 (1990-08-01), Grunberg
patent: 5159513 (1992-10-01), Dieny et al.
patent: 5206590 (1993-04-01), Dieny et al.
patent: 5247278 (1993-09-01), Pant et al.
patent: 5561368 (1996-10-01), Dovek et al.
patent: 5686837 (1997-11-01), Coehoorne et al.
patent: 5729137 (1998-03-01), Daughton et al.
patent: 5945825 (1999-08-01), Clemens
patent: 5952825 (1999-09-01), Wan
patent: 6020738 (2000-02-01), Van Den Berg et al.
patent: 6084405 (2000-07-01), Suzuki
patent: 6100686 (2000-08-01), Van Delden et al.
patent: 6175296 (2001-01-01), Tokunaga et al.
patent: 6304074 (2001-10-01), Waffenschmidt
patent: 6313627 (2001-11-01), Van Den Burg
patent: 6522132 (2003-02-01), Vieux-Rochaz et al.
patent: 6529114 (2003-03-01), Bohlinger et al.
patent: 2003/0106731 (2003-06-01), Marino et al.
English translation of Hei 2-186285, date unknown.
Article entitled “The Magnetoresistive Sensor”, Phillips Components, found in the Phillips Technical Publication 268, May 1990 issue.
Article entitled “Magnetic Sensing” found in the Honeywell AN-209, Apr. 2000 issue.
Philips, KMZ51 Magnetic field sensor Product Description, pp. 1-3, no date.
Philips, KMZ52 Magnetic field sensor Product Description, pp. 1-3 no date.
Easthom Karl D.
Luxton Matthew
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