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:
Apr. 24, 2001
Filed:
Dec. 02, 1998
Tadahiko Shimano, Kanagawa, JP;
Masaaki Kusumi, Kanagawa, JP;
Sony Precision Technology Inc., Tokyo, JP;
Abstract
A magneto-resistive effect sensor capable of outputting a sufficient output of optimum characteristics even if a magnetized surface of a magnetized material is curved, arcuately- or polygonally-shaped. On the magneto-resistive effect sensor,plural magnetically sensitive portions,to,of the same shape are formed and arrayed parallel to one another, while being electrically connected in series to permit the current i to flow through the electrically connected magnetically sensitive portions. The magnetically sensitive portion,is made up of a mid portion,having a width w,and ends having a width w,A signal magnetic field of different strengths is applied from the magnetized material along the current flowing direction. The widths w,and w,differ with the strengths of the applied signal magnetic field and are of a ratio such that w,:w,=2:3. The strength of the signal magnetic field is high to give high resistance in a narrow-width area of the magnetically sensitive portion,while being low to give low resistance in a broad-width portion of the magnetically sensitive portion,such that the magneto-resistive effect sensor in its entirety can develop a sufficient output with an optimum S/N ratio.