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:
Jun. 12, 2001
Filed:
Oct. 20, 1998
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
Disclosed is a magnetic detector in which a GMR device is operated within the limited range of a magnetic field so as to optimize a temperature characteristic of changes in resistance value and to improve noise resistance. The magnetic detector comprises a magnet (,) for generating a magnetic field, a rotary member (,) of magnetic material arranged with a predetermined gap left relative to the magnet and provided with projections capable of changing the magnetic field generated by the magnet, and a giant magnetoresistance device (,) of which resistance value is changed depending on the magnetic field changed by the rotary member of magnetic material. The giant magnetoresistance device is arranged to have such a predetermined gap relative to the magnet that the giant magnetoresistance device operates under a magnetic field applied to change in a predetermined amplitude range, e.g., 50˜150 [Oe], where a temperature characteristic of resistance change rate of the giant magnetoresistance device is small.