MAGNETOMETER
First Claim
1. A method of operating an electronic magnetic field measuring device comprising a plurality of anisotropic magnetoresistive (AMR) sensors, the method comprising:
- realigning a respective magnetic domain orientation of each AMR sensor in only one direction; and
subsequent to the realigning of the respective magnetic domain orientation of each AMR sensor, detecting an output signal from the plurality of AMR sensors, the output signal being representative of a local magnetic field.
2 Assignments
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Accused Products
Abstract
A magnetometer with only a SET operation for initiating a magnetic orientation within a magnetic field sensor based on anisotropic magnetoresistive (AMR) technology. Within the magnetometer, the relative orientations of the respective X, Y and Z axes detectors are maintained by a package in which all detectors are mounted on a single assembly with the Z axis sensor displaced and held orthogonal to the other two sensors by potting material. Shorting bars on respective barber pole structures are provided with a geometry that allows for closer placement of adjacent barber poles to one another. The barber pole structures are deposited in a nested orientation which provides for balanced resistance legs in a Wheatstone bridge construction.
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Citations
22 Claims
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1. A method of operating an electronic magnetic field measuring device comprising a plurality of anisotropic magnetoresistive (AMR) sensors, the method comprising:
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realigning a respective magnetic domain orientation of each AMR sensor in only one direction; and subsequent to the realigning of the respective magnetic domain orientation of each AMR sensor, detecting an output signal from the plurality of AMR sensors, the output signal being representative of a local magnetic field. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An electronic magnetic field measuring device, comprising:
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a planar coil arranged in a spiral, the planar coil having an input and an output, and first and second leg portions, and the planar coil arranged in a first plane of the device; a first plurality of barber pole structures, each barber pole structure of a first polarity, coupled in electrical series with another by a respective trace of a first plurality of conductive traces located between adjacent barber pole structures in the first plurality of series-connected barber pole structures; and a second plurality of barber pole structures, each barber pole structure of a second polarity, coupled in electrical series with another by a respective trace of a second plurality of conductive traces located between adjacent barber pole structures in the second plurality of series-connected barber pole structures, wherein the first and second pluralities of series-connected barber pole structures are arranged in a second plane of the device different from the first plane, wherein the first and second pluralities of series-connected barber pole structures are disposed above only the first leg portion of the planar coil, wherein the first and second pluralities of series-connected barber pole structures are arranged parallel with one another, and wherein at least one trace of the first plurality of conductive traces and at least one trace of the second plurality of conductive traces are nested with one another. - View Dependent Claims (8, 9, 10)
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11. An electronic magnetic field measuring device, comprising:
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a first barber pole structure including a first permalloy portion and a plurality of shorting bars oriented at a first angle on the first permalloy portion; and a second barber pole structure including a second permalloy portion, separate from the first permalloy portion, and a second plurality of shorting bars oriented at a second angle on the second permalloy portion, wherein each shorting bar of the first and second pluralities of shorting bars has a same first geometry, and wherein the first geometry comprises a rectangle with a pair of alternate and opposite clipped corners.
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12. An electronic magnetic field measuring device, comprising:
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a flexible substrate with conductive interconnect traces, the flexible substrate including a first portion and a hingeable tab portion; an ASIC module mounted on the first portion of the flexible substrate; a first magnetic field sensor mounted on the first portion of the flexible substrate; a second magnetic field sensor mounted on the first portion of the flexible substrate; and a third magnetic field sensor mounted on the hingeable tab portion of the flexible substrate. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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19. A method of manufacturing an electronic magnetic field measuring device, the method comprising:
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providing a flexible substrate having a plurality of conductive traces, the flexible substrate including a first portion and a tab portion; mounting an ASIC module on the first portion of the flexible substrate; mounting first and second magnetic field sensors on the first portion of the flexible substrate; mounting a third magnetic field sensor on the tab portion of the flexible substrate; rendering the tab portion hingeably connected to the first portion; and displacing the hingeably connected tab portion to be substantially perpendicular with respect to the first portion of the flexible circuit. - View Dependent Claims (20, 22)
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21. The method of claim 21, further comprising:
providing potting material to the flexible substrate to maintain the tab portion substantially perpendicular to the first portion.
Specification