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:
Oct. 02, 2012
Filed:
Sep. 20, 2010
Kazuya Sakai, Kariya, JP;
Kazuya Sakai, Kariya, JP;
JTEKT Corporation, Osaka, JP;
Abstract
A rotational angle sensor includes: a magnet rotor in which multiple magnetic poles are formed along the circumferential direction of the magnet rotor; and three sensor devices that are arranged on a circle concentric with the magnet rotor at regular angle intervals. Each of the sensor devices includes three half-bridge circuits each of which has a pair of spin valve magnetic resistances that are connected in series in such a manner that the magnetization directions of spin fixed layers of the spin valve magnetic resistances are opposite to each other. Each of the sensor devices is formed in such a manner that phases of the sensor signals output from the respective half-bridge circuits based on a change in magnetic flux caused by the rotation of the magnet rotor are offset from each other by an electrical angle of 120°.