公开(公告)号：US20190250222A1

公开(公告)日：2019-08-15

申请号：US15892843

申请日：2018-02-09

Applicant: Allegro MicroSystems, LLC

Inventor： Andreas P. Friedrich ,  Andrea Foletto ,  Nicolas Yoakim

IPC: G01R33/07 ,  G01R33/00

CPC classification number: G01R33/077 ,  G01R33/0005 ,  G01R33/0094

Abstract: A magnetic field sensor for sensing a direction of a magnetic field in an x-y plane, can include a first plurality of magnetic field sensing elements operable to generate a first plurality of magnetic field signals and a second plurality of magnetic field sensing elements operable to generate a second plurality of magnetic field signals. The magnetic field sensor can also include at least one sequence switches circuit operable to select ones of the first plurality of magnetic field signals and to select ones of the second plurality of magnetic field signals. The magnetic field sensor can also include a processing circuit operable to combine the selected ones of the first plurality of magnetic field signals and the selected ones of the second plurality of magnetic field signals to generate at least one sequential signal and to process the at least one sequential signal to generate an x-y angle signal indicative of a direction of the magnetic field in the x-y direction. An associated method is described.

公开(公告)号：US11022464B2

公开(公告)日：2021-06-01

申请号：US16157130

申请日：2018-10-11

Applicant: Allegro MicroSystems, LLC

Inventor： Andreas P. Friedrich ,  Marie-Adelaide Lo ,  Andrea Foletto ,  Nicolas Yoakim

IPC: G01D5/16 ,  G01D5/14

Abstract: A magnetic field sensor includes one or more magnetic field sensing elements and a back-biased magnet arranged to avoid saturation of the one or more magnetic field sensing elements, particularly when the one or more magnetic field sensing elements comprise one or more magnetoresistance elements. The one or more magnetoresistance elements can be arranged in a resistor bridge.

公开(公告)号：US10386427B1

公开(公告)日：2019-08-20

申请号：US15892843

申请日：2018-02-09

Applicant: Allegro MicroSystems, LLC

Inventor： Andreas P. Friedrich ,  Andrea Foletto ,  Nicolas Yoakim

IPC: G01B7/30 ,  G01R33/07 ,  G01R33/00

Abstract: A magnetic field sensor for sensing a direction of a magnetic field in an x-y plane, can include a first plurality of magnetic field sensing elements operable to generate a first plurality of magnetic field signals and a second plurality of magnetic field sensing elements operable to generate a second plurality of magnetic field signals. The magnetic field sensor can also include at least one sequence switches circuit operable to select ones of the first plurality of magnetic field signals and to select ones of the second plurality of magnetic field signals. The magnetic field sensor can also include a processing circuit operable to combine the selected ones of the first plurality of magnetic field signals and the selected ones of the second plurality of magnetic field signals to generate at least one sequential signal and to process the at least one sequential signal to generate an x-y angle signal indicative of a direction of the magnetic field in the x-y direction. An associated method is described.