公开(公告)号：US20180254686A1

公开(公告)日：2018-09-06

申请号：US15831508

申请日：2017-12-05

Applicant: TDK Corporation

Inventor： Yosuke Komasaki ,  Naoki Ohta ,  Hayato Miyashita ,  Takakazu Imai ,  Hiraku Hirabayashi ,  Masanori Sakai ,  Satoshi Abe ,  Tsuyoshi Umehara

IPC: H02K11/215 ,  H02P6/16 ,  G01R33/09 ,  H01L43/08 ,  G01R15/20

CPC classification number: H02K11/215 ,  G01R15/205 ,  G01R33/091 ,  G01R33/093 ,  H01L27/22 ,  H01L43/08 ,  H02P6/16

Abstract: A magnetic sensor includes a magnetic detection element circuit that includes first and second magnetic detection elements, which are connected in series, and an output terminal, which is positioned between the first and second magnetic detection elements; an impedance matching device, which has a prescribed input voltage range and is connected to an output terminal of the magnetic detection element circuit; a first current supply source, which supplies an electric current to the magnetic detection element circuit; and a second current supply source, which supplies an electric current to the impedance matching device. A resistor is provided between the output terminal of the magnetic detection element circuit and the first current supply source and/or a reference electric potential point.

公开(公告)号：US11754647B2

公开(公告)日：2023-09-12

申请号：US17836016

申请日：2022-06-09

Applicant: TDK CORPORATION

Inventor： Shunji Saruki ,  Hiraku Hirabayashi ,  Masanori Sakai

IPC: G01R33/09 ,  G01R33/00

CPC classification number: G01R33/098 ,  G01R33/0017 ,  G01R33/093 ,  G01R33/096

Abstract: At a reference position within a first plane, a magnetic field to be detected has a first direction that changes within the first plane. A magnetic sensor includes an MR element. The MR element includes a magnetic layer having first magnetization that can change in direction within a second plane. The first plane and the second plane intersect at a dihedral angle α other than 90°. The magnetic field to be detected can be divided into an in-plane component parallel to the second plane and a perpendicular component perpendicular to the second plane. The in-plane component has a second direction that changes with a change in the first direction. The direction of the first magnetization changes with a change in the second direction. A detection value depends on the direction of the first magnetization.

公开(公告)号：US12164009B2

公开(公告)日：2024-12-10

申请号：US17895775

申请日：2022-08-25

Applicant: TDK CORPORATION

Inventor： Keisuke Takasugi ,  Kenzo Makino ,  Hiraku Hirabayashi ,  Masanori Sakai

IPC: G01R33/09 ,  G01R15/14 ,  H10N50/80

Abstract: A magnetic sensor includes a first insulating layer, a second insulating layer, a third insulating layer, a lower coil element located on an opposite side of the first insulating layer from the second insulating layer, and a second MR element. The second MR element includes a magnetization pinned layer and a free layer. The magnetization pinned layer and the free layer are located on an opposite side of the third insulating layer from the second insulating layer. The first and third insulating layers each contain a first insulating material. The second insulating layer contains a second insulating material.

公开(公告)号：US11385043B2

公开(公告)日：2022-07-12

申请号：US16729558

申请日：2019-12-30

Applicant: TDK CORPORATION

Inventor： Shinichirou Mochizuki ,  Masanori Sakai

IPC: G01B7/30 ,  G01D5/14 ,  H03M3/00 ,  G01D5/16

Abstract: An angle sensor includes a first magnetic sensor and a second magnetic sensor. The first magnetic sensor includes first and second detectors, and first and second analog-to-digital converters for converting analog detection signals generated by the first and second detectors into digital detection signals. The second magnetic sensor includes third and fourth detectors, and third and fourth analog-to-digital converters for converting analog detection signals generated by the third and fourth detectors into digital detection signals. The first to fourth analog-to-digital converters perform sampling at the same sampling time.

公开(公告)号：US11346898B2

公开(公告)日：2022-05-31

申请号：US16912714

申请日：2020-06-26

Applicant: Asahi Kasei Microdevices Corporation ,  TDK Corporation

Inventor： Yoshitaka Okutsu ,  Masanori Yoshida ,  Kazuhiro Ishida ,  Kazuya Watanabe ,  Hiraku Hirabayashi ,  Masanori Sakai

IPC: G01R33/09 ,  G01D5/20 ,  G01R33/00

Abstract: An object is to provide a magnetic sensor module that suppresses a size of a magnetic sensor chip while applying a uniform calibration magnetic field to a magneto-resistive element. Provided is a magnetic sensor module comprising an IC chip having a first coil; and a magnetic sensor chip that is disposed on a surface of the IC chip and includes a first magnetic sensor that detects magnetism in a direction of first axis, wherein a planar shape of the IC chip encompasses a planar shape of the magnetic sensor chip, and the first coil has a planar shape including three or more sides, and is, when seen in a cross section along at least one side of the planar shape, is formed so as to cover a region, in a direction of the one side, of the first magnetic sensor.