Patents by Inventor Maxime Rioult
Maxime Rioult has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11852699Abstract: 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.Type: GrantFiled: February 28, 2023Date of Patent: December 26, 2023Assignee: Allegro MicroSystems, LLCInventors: Rémy Lassalle-Balier, Maxime Rioult
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Publication number: 20230332878Abstract: In one aspect, an angle sensor includes a first plurality of magnetoresistance elements located at a first location on an axis and a second plurality of magnetoresistance elements located at a second location on the axis. The first plurality of magnetoresistance elements includes a first one or more magnetoresistance elements each having a reference direction in a first direction; and a second one or more magnetoresistance elements each having a reference direction in a second direction. The second plurality of magnetoresistance elements includes a third one or more magnetoresistance elements each having a reference direction in the first direction, and a fourth one or more magnetoresistance elements each having a reference direction in the second direction. The angle sensor senses movement of a magnetic target, and the magnetic target is a ring magnet or a single pole magnet.Type: ApplicationFiled: June 20, 2023Publication date: October 19, 2023Applicant: Allegro MicroSystems, LLCInventors: Rémy Lassalle-Balier, Solène Bastien, Paul A. David, Maxime Rioult, Alexander Latham, Shaun Veilleux
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Publication number: 20230204694Abstract: 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.Type: ApplicationFiled: February 28, 2023Publication date: June 29, 2023Applicant: Allegro MicroSystems, LLCInventors: Rémy Lassalle-Balier, Maxime Rioult
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Patent number: 11686599Abstract: Methods and apparatus that can include a rotatable target to generate a sinusoidal signal in a magnetic field sensor, wherein the target includes a plurality of sinusoidal teeth to reduce angular error. A magnetic field sensor can be configured to determine a position of the target. In embodiments, a rotatable target to generate a sinusoidal signal in a magnetic field sensor can include a plurality of sinusoidal teeth and a number of harmonics to reduce angular error.Type: GrantFiled: January 7, 2022Date of Patent: June 27, 2023Assignee: Allegro MicroSystems, LLCInventors: Rémy Lassalle-Balier, Jeffrey Eagen, Damien Dehu, Paul A. David, Andrea Foletto, Maxime Rioult
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Patent number: 11630168Abstract: 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.Type: GrantFiled: February 3, 2021Date of Patent: April 18, 2023Assignee: Allegro MicroSystems, LLCInventors: Rémy Lassalle-Balier, Maxime Rioult
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Publication number: 20220244328Abstract: 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.Type: ApplicationFiled: February 3, 2021Publication date: August 4, 2022Applicant: Allegro MicroSystems, LLCInventors: Rémy Lassalle-Balier, Maxime Rioult
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Patent number: 11327127Abstract: A magnetic field sensor responsive to a movement of a target object can include a plurality of magnetoresistance elements arranged in a line and having a span according to y(1?1/x), where y is equal a full spatial period of the target object and where x is equal to a total quantity of magnetoresistance elements in the plurality of magnetoresistance elements. The plurality of magnetic field sensing elements is operable to generate a signal that is substantially not responsive to the movement of the target object but is responsive to stray external magnetic fields.Type: GrantFiled: July 10, 2019Date of Patent: May 10, 2022Assignee: Allegro MicroSystems, LLCInventors: Rémy Lassalle-Balier, Maxime Rioult, Jean-Michel Daga
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Publication number: 20220128379Abstract: Methods and apparatus that can include a rotatable target to generate a sinusoidal signal in a magnetic field sensor, wherein the target includes a plurality of sinusoidal teeth to reduce angular error. A magnetic field sensor can be configured to determine a position of the target. In embodiments, a rotatable target to generate a sinusoidal signal in a magnetic field sensor can include a plurality of sinusoidal teeth and a number of harmonics to reduce angular error.Type: ApplicationFiled: January 7, 2022Publication date: April 28, 2022Applicant: Allegro MicroSystems, LLCInventors: Rémy Lassalle-Balier, Jeffrey Eagen, Damien Dehu, Paul A. David, Andrea Foletto, Maxime Rioult
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Patent number: 11255700Abstract: 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.Type: GrantFiled: July 31, 2019Date of Patent: February 22, 2022Assignee: Allegro MicroSystems, LLCInventors: Rémy Lassalle-Balier, Jeffrey Eagen, Damien Dehu, Paul A. David, Andrea Foletto, Maxime Rioult
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Publication number: 20210011096Abstract: A magnetic field sensor responsive to a movement of a target object can include a plurality of magnetoresistance elements arranged in a line and having a span according to y(1?1/x), where y is equal a full spatial period of the target object and where x is equal to a total quantity of magnetoresistance elements in the plurality of magnetoresistance elements. The plurality of magnetic field sensing elements is operable to generate a signal that is substantially not responsive to the movement of the target object but is responsive to stray external magnetic fields.Type: ApplicationFiled: July 10, 2019Publication date: January 14, 2021Applicant: Allegro MicroSystems, LLCInventors: Rémy Lassalle-Balier, Maxime Rioult, Jean-Michel Daga
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Publication number: 20200041310Abstract: 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.Type: ApplicationFiled: July 31, 2019Publication date: February 6, 2020Applicant: Allegro MicroSystems, LLCInventors: Rémy Lassalle-Balier, Jeffrey Eagen, Damien Dehu, Paul A. David, Andrea Foletto, Maxime Rioult