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

IPC: G01D11/24 ,  G01D5/16

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.

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

IPC: G01D11/24 ,  G01D5/16

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.

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

IPC: G01R33/00 ,  G01D5/16 ,  H01L43/08 ,  H01L43/12 ,  H01L43/02

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.