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:
Feb. 15, 2000
Filed:
Sep. 01, 1998
Applicant:
Inventors:
Haruki Yamane, Tokyo, JP;
Juro Mita, Tokyo, JP;
Assignee:
Oki Electric Industry Co., Ltd., Tokyo, JP;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
360113 ;
Abstract
A magnetoresistive sensor has a magnetic bias field source that generates an alternating magnetic bias field, a giant magnetoresistive sensing element positioned in the alternating magnetic bias field, and a resistance detecting circuit that detects changes in the electrical resistance of the giant magnetoresistive sensing element caused by the combined action of the alternating magnetic bias field and an external magnetic field. The alternating magnetic bias field enables small external magnetic fields to be detected with high sensitivity.