公开(公告)号：US10571298B2

公开(公告)日：2020-02-25

申请号：US16071118

申请日：2017-03-13

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Takuya Tomida ,  Takeshi Uemura ,  Hideaki Fujiura ,  Ryo Osabe

IPC: G01D5/14 ,  G01D5/16 ,  G01B7/30 ,  B62D15/02 ,  G01R15/20 ,  G01R33/07 ,  G01R33/09 ,  G01R35/00 ,  G01R33/02 ,  G01D5/12 ,  G01R33/06

Abstract: A rotation detecting device includes first to fourth magneto-resistive elements that are provided on a first substrate to constitute a bridge circuit, a detection circuit provided on a second substrate, first to fourth wirings each connecting between the detection circuit and respective one of ends of the first to fourth magneto-resistive elements, first to fourth nodes provided on the second substrate, and first and second amplifiers provided on the second substrate. The first node combines signals on the first and second wirings. The second node combines signals on the third and fourth wirings. The first and second amplifiers amplify signals at the first and second nodes, respectively.

公开(公告)号：US10935396B2

公开(公告)日：2021-03-02

申请号：US16748491

申请日：2020-01-21

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Takuya Tomida ,  Takeshi Uemura ,  Hideaki Fujiura ,  Ryo Osabe

IPC: G01D5/14 ,  G01D5/16 ,  G01B7/30 ,  B62D15/02 ,  G01R15/20 ,  G01R33/07 ,  G01R33/09 ,  G01R35/00 ,  G01R33/02 ,  G01D5/12 ,  G01R33/06

Abstract: A magnetic sensor includes a magneto-resistive element configured to output a signal and a detection circuit configured to receive the signal. The detection circuit includes a regulator configured to supply a potential to the magneto-resistive element, a first current path configured to electrically connect the magneto-resistive element to the regulator, a second current path, a switch, and a diagnostic circuit connected to the second current path. The second current path includes, and is configured to electrically connect the magneto-resistive element to the regulator via the resistor. The switch is configured to select one of the first current path and the second current path, and electrically connect the magneto-resistive element to the regulator via the selected one of the first current path and the second current path.

公开(公告)号：US10890464B2

公开(公告)日：2021-01-12

申请号：US16071134

申请日：2017-03-13

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Ryo Osabe ,  Hideaki Fujiura ,  Takeshi Uemura ,  Takuya Tomida

IPC: G01D5/14 ,  G01D5/16 ,  G01B7/30 ,  B62D15/02 ,  G01R15/20 ,  G01R33/07 ,  G01R33/09 ,  G01R35/00 ,  G01R33/02 ,  G01D5/12 ,  G01R33/06

Abstract: A rotation detecting device includes first and second magnetic detection elements that output first and second signals and a detection circuit having the first and second signals input thereto. The detection circuit includes an automatic correction circuit that performs generating and updating of a correction value for correcting the and second signals. The automatic correction circuit is configured to stop the generating or the updating of the correction value in at least one of a case where a rotation direction of an object is changed to a reverse rotation direction from a normal rotation direction and a case where a rotation direction of the object is changed to the normal rotation direction from the reverse rotation direction.