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公开(公告)号：US20150194597A1
公开(公告)日：2015-07-09
申请号：US14452783
申请日：2014-08-06
Applicant: Allegro MicroSystems, LLC
Inventor： Claude Fermon , Myriam Pannetier-Lecoeur , Marie-Claire Cyrille , Cyril Dressler , Paolo Campiglio
CPC classification number: G11B5/3932 , G01R33/0052 , G01R33/09 , G01R33/093 , G01R33/098 , G11B5/39 , G11B5/3903 , G11B5/3906 , G11B5/3909 , G11B5/3929 , G11B2005/3996 , H01F10/3263 , H01F10/3272 , H01F41/306 , H01L43/02 , H01L43/08 , H01L43/10 , H01L43/12 , Y10T29/41
Abstract: A magnetoresistance element has a double pinned arrangement with two antiferromagnetic pinning layers, two pinned layers, and a free layer. A spacer layer between one of the two antiferromagnetic pinning layers and the free layer has a material selected to allow a controllable partial pinning by the one of the two antiferromagnetic pinning layers.
Abstract translation: 磁阻元件具有双重固定布置，其具有两个反铁磁钉扎层，两个钉扎层和自由层。 两个反铁磁钉扎层之一和自由层之间的间隔层具有被选择为允许两个反铁磁钉扎层中的一个的可控部分钉扎的材料。
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公开(公告)号：US11768256B2
公开(公告)日：2023-09-26
申请号：US17810461
申请日：2022-07-01
Applicant: Allegro MicroSystems, LLC , Commissariat à l'énergie atomique et aux énergies alternatives
Inventor： Alexander Latham , Claude Fermon , Jason Boudreau , Myriam Pannetier-Lecoeur , Bryan Cadugan , Hernán D. Romero
Abstract: A magnetic field sensor includes at least one coil responsive to an AC coil drive signal; at least one magnetic field sensing element responsive to a sensing element drive signal and configured to detect a directly coupled magnetic field generated by the at least one coil and to generate a magnetic field signal in response to the directly coupled magnetic field; a processor responsive to the magnetic field signal to compute a sensitivity value associated with detection of the directly coupled magnetic field and substantially independent of a reflected magnetic field reflected by a conductive target disposed proximate to the at least one magnetic field sensing element; and an output signal generator configured to generate an output signal of the magnetic field sensor indicative of the reflected magnetic field.
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公开(公告)号：US11428755B2
公开(公告)日：2022-08-30
申请号：US15606332
申请日：2017-05-26
Applicant: ALLEGRO MICROSYSTEMS, LLC , Commissariat À l'énergie atomique et aux énergies alternatives
Inventor： Alexander Latham , Claude Fermon , Jason Boudreau , Myriam Pannetier-Lecoeur , Bryan Cadugan , Hernán D. Romero
Abstract: A magnetic field sensor includes at least one coil responsive to an AC coil drive signal; at least one magnetic field sensing element responsive to a sensing element drive signal and configured to detect a directly coupled magnetic field generated by the at least one coil and to generate a magnetic field signal in response to the directly coupled magnetic field; a processor responsive to the magnetic field signal to compute a sensitivity value associated with detection of the directly coupled magnetic field and substantially independent of a reflected magnetic field reflected by a conductive target disposed proximate to the at least one magnetic field sensing element; and an output signal generator configured to generate an output signal of the magnetic field sensor indicative of the reflected magnetic field.
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公开(公告)号：US11199424B2
公开(公告)日：2021-12-14
申请号：US16553641
申请日：2019-08-28
Applicant: ALLEGRO MICROSYSTEMS, LLC , COMMISSARIAT À L'ÉNERGIE ATOMIQUE ET AUX ÉNERGIES ALTERNATIVES
Inventor： Rémy Lassalle-Balier , Claude Fermon , Damien Dehu , Kamil Akmaldinov
IPC: G01D5/16
Abstract: In one aspect, a magnetic field angle sensor includes a bridge structure that include a sine bridge configured to generate a sinusoidal signal indicative of a magnetic field along a first axis and a cosine bridge configured to generate a cosinusoidal signal indicative of the magnetic field along a second axis that is orthogonal with respect to the first axis. One of the sine bridge or the cosine bridge includes a first set of at least two magnetoresistance elements, a second set of at least one magnetoresistance element, a third set of at least one magnetoresistance element and a fourth set of at least one magnetoresistance element. An average reference direction of the first set of at least two magnetoresistance elements is equal to an average reference direction of the third set of at least one magnetoresistance element. An average reference direction of the second set of at least one magnetoresistance element is equal to an average direction angle of the fourth set of at least one magnetoresistance element.
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公开(公告)号：US20200169299A1
公开(公告)日：2020-05-28
申请号：US16200799
申请日：2018-11-27
Applicant: Allegro MicroSystems, LLC , Commissariat à l'énergie atomique et aux énergies alternatives
Inventor： Alexander Latham , Claude Fermon , Myriam Pannetier-Lecoeur
IPC: H04B5/00
Abstract: Methods and apparatus for providing data transfer with a drive coil to transmit information, a receive coil magnetically coupled to the drive coil, and a first magnetoresistive sensor proximate the receive coil to detect information from the receive coil. In embodiments, the drive and receive coils are separated by an isolation material. In embodiments, a signal isolator IC packages includes transmit and receive coils and a magnetic field sensing element coupled to the receive coil.
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Patent Agency Ranking
公开(公告)号：US20200057120A1
公开(公告)日：2020-02-20
申请号：US15999448
申请日：2018-08-20
Applicant: Allegro MicroSystems, LLC , Commissariat à l'énergie atomique et aux énergies alternatives
Inventor： Noémie Belin , Shaun D. Milano , Wade Bussing , Claude Fermon
IPC: G01R33/09
Abstract: Systems and methods described herein provide a current sensor based on magnetic field detection having multiple sensor arrangements with multiple, different sensitivity ranges. The outputs of the multiple sensor arrangements can be combined to generate a single output signal. The current sensor can include two or more sensor arrangements, each having one or more magnetic field sensing elements, and configured to sense a magnetic field in different first measurement ranges corresponding to different ranges of currents through the conductor and further configured to generate different magnetic field signals indicative of the sensed magnetic field in the respective measurement range. The current sensor can include a circuit configured to generate an output signal indicative of a combination of the different magnetic field signals that corresponds to the current through the conductor.
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公开(公告)号：US10078117B2
公开(公告)日：2018-09-18
申请号：US14870834
申请日：2015-09-30
Applicant: Allegro MicroSystems, LLC
Inventor： Gerardo A. Monreal , Andreas P. Friedrich , Claude Fermon , Myriam Pannetier-Lecoeur
CPC classification number: G01R33/0023 , G01R33/09 , G01R33/093
Abstract: A magnetic field sensor and an associated method use one or more magnetoresistance elements driven with an AC mixing current and experiencing an AC mixing magnetic field to generate a DC voltage signal or a DC voltage signal component related to a slope of a transfer curve of the one or more magnetoresistance elements.
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公开(公告)号：US09922673B2
公开(公告)日：2018-03-20
申请号：US14529564
申请日：2014-10-31
Applicant: Allegro MicroSystems, LLC
Inventor： Paolo Campiglio , Bryan Cadugan , Claude Fermon , Rémy Lassalle-Balier
IPC: G11B5/39 , G01R33/09 , H01F10/32 , H01L43/08 , G01R33/00 , H01L43/02 , H01L43/10 , H01L43/12 , H01F41/30
CPC classification number: G11B5/3932 , G01R33/0052 , G01R33/09 , G01R33/093 , G01R33/098 , G11B5/39 , G11B5/3903 , G11B5/3906 , G11B5/3909 , G11B5/3929 , G11B2005/3996 , H01F10/3263 , H01F10/3272 , H01F41/306 , H01L43/02 , H01L43/08 , H01L43/10 , H01L43/12 , Y10T29/41
Abstract: A magnetoresistance element has a pinning arrangement with two antiferromagnetic pinning layers, two pinned layers, and a free layer. A spacer layer between one of the two antiferromagnetic pinning layers and the free layer has a material selected to allow a controllable partial pinning by the one of the two antiferromagnetic pinning layers.
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19.发明申请Magnetoresistance Element with an Improved Seed Layer to Promote an Improved Response to Magnetic Fields 有权具有改进的种子层的磁阻元件以促进对磁场的改善的响应公开(公告)号：US20150192649A1
公开(公告)日：2015-07-09
申请号：US14591213
申请日：2015-01-07
Applicant: Allegro MicroSystems, LLC
Inventor： Cyril Dressler , Claude Fermon , Myriam Pannetier-Lecoeur , Marie-Claire Cyrille , Paolo Campiglio
CPC classification number: G11B5/3932 , G01R33/0052 , G01R33/09 , G01R33/093 , G01R33/098 , G11B5/39 , G11B5/3903 , G11B5/3906 , G11B5/3909 , G11B5/3929 , G11B2005/3996 , H01F10/3263 , H01F10/3272 , H01F41/306 , H01L43/02 , H01L43/08 , H01L43/10 , H01L43/12 , Y10T29/41
Abstract: A magnetoresistance element has a seed layer that promotes an increased magnetic anisotropy of layers of the magnetoresistance element above the seed layer structure.
Abstract translation: 磁阻元件具有种子层，其在种子层结构之上促进磁阻元件的层的增加的磁各向异性。
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公开(公告)号：US11193989B2
公开(公告)日：2021-12-07
申请号：US16047342
申请日：2018-07-27
Applicant: Allegro MicroSystems, LLC , Commissariat à l'énergie atomique et aux énergies alternatives
Inventor： Paolo Campiglio , Bryan Cadugan , Amal Hamdache , Florian Pallier , Claude Fermon
Abstract: A magnetoresistance assembly can include a substrate and a first GMR element disposed over the substrate, the first GMR element having a bottom surface and top surface. The magnetoresistance assembly can further include a first TMR element disposed over the substrate, the first TMR element having a top surface and a bottom surface, wherein a line perpendicular to and intersecting the top or bottom surface of the first TMR element intersects the first GMR element. The first GMR element and the first TMR element are in electrical communication.
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