公开(公告)号：US20200319265A1

公开(公告)日：2020-10-08

申请号：US16376725

申请日：2019-04-05

Applicant: Apple Inc.

Inventor： Savas Gider ,  Chaitanya Mudivarthi ,  Joyce M. Mullenix

IPC: G01R33/00 ,  G01R33/09

Abstract: Disclosed is a magnetometer architecture that couples one or more coils to a magnetic yoke to allow the reset of the magnetic yoke and one or more magnetic field sensors simultaneously after, for example, exposure to a large stray magnetic field. Also, disclosed is a magnetometer architecture that integrates separate magnetic pole pieces offset from the yoke that are each wound by a reset coil to allow reset of the one or more magnetic field sensors.

公开(公告)号：US20190369169A1

公开(公告)日：2019-12-05

申请号：US15993528

申请日：2018-05-30

Applicant: Apple Inc.

Inventor： Savas Gider ,  Jian Guo ,  Chaitanya Mudivarthi

IPC: G01R33/00 ,  G01C17/02 ,  G01R33/09

Abstract: Disclosed is a magnetometer architecture that uses a separate shield to minimize cross-axis sensitivity with low impact on main axis sensitivity. In an embodiment, a magnetometer with cross-axis shielding comprises: a ring shield; a magnetic yoke disposed within the ring shield; and one or more magnetic field sensors disposed between the ring shield and the magnetic yoke, the magnetic field sensors positioned relative to the ring shield and the magnetic yoke such that flux induced by a magnetic field is absorbed in a cross-axis direction of the magnetometer.