The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 14, 2021
Filed:
Apr. 06, 2018
Tdk Corporation, Tokyo, JP;
Kei Tanabe, Tokyo, JP;
Akihiro Unno, Tokyo, JP;
TDK Corporation, Tokyo, JP;
Abstract
A magnetic sensor suppressing bias magnetic field effects includes a magnetic detecting unit including first to fourth magneto-resistive elements to which a first magnetic field to be detected is applied, a differential amplifier into which the output voltage of the magnetic detecting unit is input, a first magnetic field generating conductor which, by a first feedback current output by the differential amplifier, applies to the magnetic detecting unit a second magnetic field to cancel the first magnetic field detected by the magnetic detecting unit, a bias magnetic field detector which detects a bias magnetic field applied to the magnetic detecting unit and outputs a second feedback current corresponding to the bias magnetic field, and a second magnetic field generating conductor which, by the second negative feedback current, applies to the magnetic detecting unit a correcting magnetic field to cancel the bias magnetic field detected by the magnetic detecting unit.