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公开(公告)号：US20210048320A1
公开(公告)日：2021-02-18
申请号：US16542531
申请日：2019-08-16
Applicant: NXP B.V.
Inventor： Stephan Marauska , Thomas Hain , Berkan Zorlubas , Bernd Offermann , Dennis Helmboldt
Abstract: A system includes an encoder magnet, a magnetic field sensor, and a shield structure. The encoder magnet is configured to rotate about an axis of rotation and is configured to produce a measurement magnetic field. The magnetic field sensor is axially displaced away from the encoder magnet and is configured to detect the measurement magnetic field. The shield structure at least partially surrounds both of the encoder magnet and the magnetic field sensor for shielding against stray magnetic fields. The shield structure attaches to a secondary structure. The shield structure and the encoder magnet may be coupled via the secondary structure so that they are commonly rotational. Alternatively, the sensor package and the shield structure are coupled via the secondary structure so that they are nonrotational relative to the encoder magnet.
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2.发明申请公开(公告)号：US20190018080A1
公开(公告)日：2019-01-17
申请号：US15647709
申请日：2017-07-12
Applicant: NXP B.V.
Inventor： Stephan Marauska , Jörg Kock , Mark Isler , Harmut Matz , Dennis Helmboldt
Abstract: A system comprises at least one magnetic field sensor having a magnetic sense element formed on a substrate. The sense element senses a magnetic field along a sense axis oriented in a first direction parallel to a surface of the substrate. A shield structure is formed on the substrate. The shield structure has first and second shield portions and the magnetic sense element is disposed between the shield portions. Each of the shield portions includes a body and first and second brim segments extending from opposing ends of the body. The body is aligned parallel to a second direction perpendicular to the first direction and parallel to the surface of the substrate. The brim segments are aligned substantially parallel to the first direction. The shield portions are arranged in mirror symmetry with the brim segments of each of the shield portions extending toward one another.
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公开(公告)号：US11486742B2
公开(公告)日：2022-11-01
申请号：US16542531
申请日：2019-08-16
Applicant: NXP B.V.
Inventor： Stephan Marauska , Thomas Hain , Berkan Zorlubas , Bernd Offermann , Dennis Helmboldt
Abstract: A system includes an encoder magnet, a magnetic field sensor, and a shield structure. The encoder magnet is configured to rotate about an axis of rotation and is configured to produce a measurement magnetic field. The magnetic field sensor is axially displaced away from the encoder magnet and is configured to detect the measurement magnetic field. The shield structure at least partially surrounds both of the encoder magnet and the magnetic field sensor for shielding against stray magnetic fields. The shield structure attaches to a secondary structure. The shield structure and the encoder magnet may be coupled via the secondary structure so that they are commonly rotational. Alternatively, the sensor package and the shield structure are coupled via the secondary structure so that they are nonrotational relative to the encoder magnet.
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公开(公告)号：US10914611B2
公开(公告)日：2021-02-09
申请号：US16113229
申请日：2018-08-27
Applicant: NXP B.V.
Inventor： Stephan Marauska , Edwin Schapendonk , Jörg Kock , Dennis Helmboldt , Ralf van Otten , Jaap Ruigrok
IPC: G01D5/16
Abstract: A system includes a magnet having an axis of rotation, the magnet being configured to produce a magnetic field. The system further includes a plurality of magnetoresistive sensor elements, each of the magnetoresistive sensor elements having a magnetic free layer configured to generate a vortex magnetization pattern in the magnetic free layer, and the magnetoresistive sensor elements being configured to produce output signals in response to the magnetic field. A rotation angle of a rotating element to which the magnet is coupled may be determined using the plurality of output signals.
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公开(公告)号：US10591320B2
公开(公告)日：2020-03-17
申请号：US15836975
申请日：2017-12-11
Applicant: NXP B.V.
Inventor： Stephan Marauska , Jan Przytarski , Jörg Kock , Edwin Schapendonk
IPC: G01D5/244 , G01R33/025 , G01R33/09 , G01R33/00
Abstract: A system includes a magnetic sense element for detecting an external magnetic field along a sensing axis and a magnetic field source proximate the magnetic sense element for providing an auxiliary magnetic field along the sensing axis. The magnetic sense element produces a first output signal having a magnetic field signal component, responsive to the external magnetic field, that is modulated by an auxiliary magnetic field signal component responsive to the auxiliary magnetic field. A processing circuit identifies from the first output signal an influence of a magnetic interference field on the auxiliary magnetic field signal component, the magnetic interference field being directed along a non-sensing axis of the magnetic sense element, and applies a correction factor to the magnetic field signal component to produce a second output signal in which the influence of the magnetic interference field is substantially removed.
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Patent Agency Ranking
6.发明授权公开(公告)号：US10914609B2
公开(公告)日：2021-02-09
申请号：US16011974
申请日：2018-06-19
Applicant: NXP B.V.
Inventor： Stephan Marauska , Edwin Schapendonk , Dennis Helmboldt , Jaap Ruigrok , Ralf van Otten , Jan Przytarski , Jörg Kock
Abstract: A system includes a magnet configured to produce a magnetic field, the magnet having an asymmetric magnetization configuration that produces a distinct feature in the magnetic field. The asymmetric magnetization configuration can be produced via an asymmetric physical characteristic, nonuniform magnetization strengths, nonuniform magnetization distributions, off-centered magnet, and so forth. Magnetic field sensors are configured to produce output signals in response to the magnetic field, the output signals being indicative of the distinct feature in the magnetic field. A processing circuit receives the output signals and determines a rotation angle for the magnet using the output signals, the rotation angle having a range of 0-360°.
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公开(公告)号：US20200158791A1
公开(公告)日：2020-05-21
申请号：US16191694
申请日：2018-11-15
Applicant: NXP B.V.
Inventor： Stephan Marauska , Dennis Helmboldt , Bernd Offermann , Thomas Hain
Abstract: A sensor package includes a magnetic field sensor having first and second surfaces, the first surface being a sensing surface of the magnetic field sensor, a shield structure spaced apart from the magnetic field sensor, and a spacer interposed between the magnetic field sensor and the shield structure. The shield structure is configured to suppress stray magnetic fields in a plane parallel to first and second axes that are parallel to the sensing surface of the magnetic field sensor and perpendicular to one another. The shield structure may include a continuous sidewall having a central region, the spacer being surrounded by the continuous sidewall and the sensing surface of the magnetic field sensor being positioned outside of the central region. A system includes an encoder magnet and the sensor package, with the sensing surface of the magnetic field sensor facing the encoder magnet.
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公开(公告)号：US20200064157A1
公开(公告)日：2020-02-27
申请号：US16113229
申请日：2018-08-27
Applicant: NXP B.V.
Inventor： Stephan Marauska , Edwin Schapendonk , Jörg Kock , Dennis Helmboldt , Ralf van Otten , Jaap Ruigrok
IPC: G01D5/16
Abstract: A system includes a magnet having an axis of rotation, the magnet being configured to produce a magnetic field. The system further includes a plurality of magnetoresistive sensor elements, each of the magnetoresistive sensor elements having a magnetic free layer configured to generate a vortex magnetization pattern in the magnetic free layer, and the magnetoresistive sensor elements being configured to produce output signals in response to the magnetic field. A rotation angle of a rotating element to which the magnet is coupled may be determined using the plurality of output signals.
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公开(公告)号：US20190265071A1
公开(公告)日：2019-08-29
申请号：US15906125
申请日：2018-02-27
Applicant: NXP B.V.
Inventor： Jaap Ruigrok , Edwin Schapendonk , Stephan Marauska , Dennis Helmboldt , Marijn Nicolaas van Dongen
IPC: G01D5/16
Abstract: A system for determining angular position includes a magnet having at least four poles and an axis of rotation, wherein the magnet produces a magnetic field. A first magnetic field sensor produces a first output signal and a second magnetic field sensor produces a second output signal in response to the magnetic field. The magnetic field sensors are operated in a saturation mode in which the magnetic field sensors are largely insensitive to the field strength of the magnetic field. Thus, the first output signal is indicative of a first direction of the magnetic field and the second output signal is indicative of a second direction of the magnetic field. Methodology performed by a processing circuit entails combining the first and second output signals to obtain a rotation angle value of the magnet in which angular error from a stray magnetic field is at least partially canceled.
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10.发明申请公开(公告)号：US20190242956A1
公开(公告)日：2019-08-08
申请号：US15891512
申请日：2018-02-08
Applicant: NXP B.V.
Inventor： Jan Przytarski , Jörg Kock , Stephan Marauska , Edwin Schapendonk
Abstract: A system includes first and second magnetic sense elements for producing first and second output signals, respectively, in response to an external magnetic field along a sensing axis parallel to a plane of the first sense element, a magnetization direction of the second element being rotated in the plane relative to a magnetization direction of the first element. The second output signal differs from the first output signal in dependency to a magnetic interference field along a non-sensing axis of the first magnetic field. A processing circuit, receives the first and second output signals, identifies from a relationship between the first and second output signals an influence of the magnetic interference field on the first output signal, and applies a correction factor to the first output signal to produce a resultant output signal in which the influence of the magnetic interference field is substantially removed.
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