Electricity: measuring and testing – Magnetic – Magnetometers
Patent
1997-12-18
1999-11-09
Snow, Walter E.
Electricity: measuring and testing
Magnetic
Magnetometers
338 32R, G01R 3302
Patent
active
059821787
ABSTRACT:
A method and apparatus for sensing a desired component of a magnetic field using an isotropic magnetoresistive material. This is preferably accomplished by providing a bias field that is parallel to the desired component of the applied magnetic field. The bias field is applied in a first direction relative to a first set of magnetoresistive sensor elements, and in an opposite direction relative to a second set of magnetoresistive sensor elements. In this configuration, the desired component of the incident magnetic field adds to the bias field incident on the first set of magnetoresistive sensor elements, and subtracts from the bias field incident on the second set of magnetoresistive sensor elements. The magnetic field sensor may then sense the desired component of the incident magnetic field by simply sensing the difference in resistance of the first set of magnetoresistive sensor elements and the second set of magnetoresistive sensor elements.
REFERENCES:
patent: 5251170 (1993-10-01), Daughton et al.
patent: 5420819 (1995-05-01), Pohm
patent: 5424236 (1995-06-01), Daughton et al.
patent: 5569544 (1996-10-01), Daughton
patent: 5595830 (1997-01-01), Daughton
patent: 5617071 (1997-04-01), Daughton
patent: 5636159 (1997-06-01), Pohm
Helmolt et al., Intrinsic giant magnetoresistance of mixed valence La-A-Mn oxide (A.dbd.Ca,Sr,Ba)(invited), J. Appl. Physics, Nov. 15, 1994, 4 pages.
Jin et al., "Thousandfold Change in Resistivity in Magnetoresistive La-Ca-Mn-O Films", Science, vol. 264, 413, Apr. 1994, 3 pages.
Fontcuberta et al., "Chemical tuning of the colossal magnetoresistance of ferromagnetic perovskites", Euophys. Lett, 34 (5), 6 pages.
Laffez et al, "Structural Phase Transition at Low Temperature, Corresponding to Charge Ordering in the CMR . . .", Materials Research Bulletin, vol. 31, No. 8, 1996, 7 pages.
Pant Bharat B.
Wan Hong
Bruns Gregory A.
Honewell Inc.
Snow Walter E.
LandOfFree
Method and apparatus for sensing a desired component of an incid does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for sensing a desired component of an incid, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for sensing a desired component of an incid will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1461429