公开(公告)号：US10759276B2

公开(公告)日：2020-09-01

申请号：US16093741

申请日：2017-06-27

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Kazuhiro Onaka ,  Shigehiro Yoshiuchi ,  Noritaka Ichinomiya ,  Kiyotaka Yamada

IPC: B60K20/02 ,  G01B7/30 ,  G01R33/09 ,  G01R33/02 ,  G01D5/14 ,  H01L43/08 ,  H01L27/22 ,  G01D5/245 ,  H01L43/06

Abstract: A magnetic sensor includes a magneto-resistive element, a Hall element, and a detection circuit that receives a signal from the magneto-resistive element and a signal from the Hall element input thereto. The detection circuit includes an output terminal and an interrupt generation unit. The output terminal outputs, to the outside as an output signal, a signal obtained by performing to the signal input from the magneto-resistive element, at least one processing selected from amplification, analog-to-digital conversion, offset correction, and temperature-characteristics correction. The interrupt generation unit outputs an interrupt signal when the signal input from the Hall element is larger than a predetermined threshold. The magnetic sensor is high accurate and highly reliable.

公开(公告)号：US10359478B2

公开(公告)日：2019-07-23

申请号：US15554427

申请日：2016-04-26

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Kazuhiro Onaka ,  Noritaka Ichinomiya ,  Shigehiro Yoshiuchi ,  Kiyotaka Yamada

IPC: G01R33/00 ,  G01R33/07 ,  G01R33/09 ,  G01D5/14

Abstract: A magnetic sensor includes a first magnetoresistive element that detects a magnetic field along a first detection axis, a second magnetoresistive element that detects a magnetic field along a second detection axis inclining at an angle of 45 degrees with respect to the first detection axis, a first Hall element that detects a magnetic field along a third detection axis, and a second Hall element that detects a magnetic field along a fourth detection axis perpendicular to the third detection axis. This magnetic sensor has both characteristics of the Hall elements and characteristics of the magnetoresistive elements, and has high accuracy and a small size.

公开(公告)号：US10094890B2

公开(公告)日：2018-10-09

申请号：US15300747

申请日：2015-09-16

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Kiyotaka Yamada ,  Kazuhiro Onaka ,  Noritaka Ichinomiya

IPC: G01R33/09

Abstract: A magnetic sensor includes a board, a magnetoresistance element group including first and second magnetoresistance elements disposed on the board, and a magnet group including a first magnet corresponding to the first magnetoresistance element and a second magnet corresponding to the second magnetoresistance element. This magnetic sensor can have a small size and high accuracy.

公开(公告)号：US11982525B2

公开(公告)日：2024-05-14

申请号：US17295425

申请日：2019-07-05

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Kazuhiro Onaka ,  Kiyotaka Yamada ,  Noritaka Ichinomiya ,  Shigehiro Yoshiuchi

IPC: G01B7/30 ,  G01R33/09

CPC classification number: G01B7/30 ,  G01R33/091 ,  G01R33/093 ,  G01R33/096 ,  G01R33/098

Abstract: A magnetic sensor unit includes a magnet, a magnetic sensor facing a lower surface of the magnet, a magnetic shield surrounding the magnetic sensor in a lateral direction crossing up and down directions of the magnetic sensor, and a magnetic yoke covering an upper surface and a side surface of the magnet. The magnet includes a first magnetized region magnetized along the up and down direction, and a second magnetized region magnetized in a direction opposite to a direction of magnetization of the first magnetized region. The first and second magnetized regions have first and second magnetic poles provided on the lower surface of the magnet. A distance LA between a center of the first magnetic pole and a center of the second magnetic pole, a distance LB between the magnetic shield and the center of the first magnetic pole, a distance LC between the magnetic shield and the center of the second magnetic pole satisfy a relation of LA