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公开(公告)号：US20230204694A1
公开(公告)日：2023-06-29
申请号：US18175829
申请日：2023-02-28
Applicant: Allegro MicroSystems, LLC
Inventor： Rémy Lassalle-Balier , Maxime Rioult
CPC classification number: G01R33/093 , G01R33/098 , H10N50/10 , H10N50/80 , H10N50/85
Abstract: In one aspect, a linear sensor includes at least one magnetoresistance element that includes a first spin valve and a second spin valve positioned on the first spin valve. The first spin valve includes a first set of reference layers having a magnetization direction in a first direction and a first set of free layers having a magnetization direction in a second direction orthogonal to the first direction. The second spin valve includes a second set of reference layers having a magnetization direction in the first direction and a second set of free layers having a magnetization direction in a third direction orthogonal to the first direction and antiparallel to the second direction. The first direction is neither parallel nor antiparallel to a direction of an expected magnetic field.
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公开(公告)号：US11255700B2
公开(公告)日：2022-02-22
申请号：US16527313
申请日：2019-07-31
Applicant: Allegro MicroSystems, LLC
Inventor： Rémy Lassalle-Balier , Jeffrey Eagen , Damien Dehu , Paul A. David , Andrea Foletto , Maxime Rioult
Abstract: Methods and apparatus for a magnetic field sensor for measuring movement of a target including a substrate and a magnet. A first bridge structure has first and second pluralities of magnetic field sensing elements spaced from each other. An axis of sensitivity of the magnetic field sensing elements is rotated at a predetermined angle with respect to an axis of rotation of the target to generate an output signal corresponding to the position of the target and a change in a property of the magnetic field generated by the magnet.
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公开(公告)号：US20200041310A1
公开(公告)日：2020-02-06
申请号：US16527313
申请日：2019-07-31
Applicant: Allegro MicroSystems, LLC
Inventor： Rémy Lassalle-Balier , Jeffrey Eagen , Damien Dehu , Paul A. David , Andrea Foletto , Maxime Rioult
Abstract: Methods and apparatus for a magnetic field sensor for measuring movement of a target including a substrate and a magnet. A first bridge structure has first and second pluralities of magnetic field sensing elements spaced from each other. An axis of sensitivity of the magnetic field sensing elements is rotated at a predetermined angle with respect to an axis of rotation of the target to generate an output signal corresponding to the position of the target and a change in a property of the magnetic field generated by the magnet.
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