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US 6,297,628 B1Granted
Magnetoresistive bridge array
AssigneeHoneywell Inc.
InventorsRobert E. Bicking, Greg R. Furlong, Perry A. Holman, Ed L. Stern
Life of this patent
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Abstract
An interleaved parallel MR bridge array is optimized for sensing fine pitch ring magnets and can be utilized to reduce ring magnet target size for wheel speed sensing applications.
Claims24
A magnetoresistive bridge array comprising:
- a.) first, second, third, and fourth resistive elements, R1-R4 respectively, connected in a bridge electrical configuration on a surface of a silicon substrate;
- b.) each of the first through fourth resistive elements made up of a plurality of longitudinal runners shorted at the ends thereof and whose longitudinal axes are parallel to each other;
- and
- c.) the array being divided into two halves:
- 1) a fist half being composed of interleaved parallel runners R1 and R3,
- 2) a second half being composed of interleaved parallel runners of R2 and R4, and
- 3) the center to center spacing between array halves is set to be about or equal to 0.5 of a pole face of a ring magnet sensed.
4 more elements
A magnetoresistive bridge array and ring magnet target comprising:
- a.) first, second, third, and fourth resistive elements, R1-R4 respectively, connected in wheatstone bridge electrical configuration on a surface of a silicon substrate;
- b.) each of the first through fourth resistive element made up of a plurality of longitudinal runners shorted at the ends thereof and whose longitudinal axes are parallel to each other;
- c. ) the array being divided into two halves:
- a fist half being composed of interleaved parallel runners R1 and R3,
- a second half being composed of interleaved parallel runners of R2 and R4;
- d.) a ring magnet of N dimension for each pole face;
- and
- e.) the array halves having a center to center spacing of 0.5 N.
5 more elements
Dependencies are inferred from the claim text.