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. 26, 1982
Filed:
Jun. 09, 1980
Applicant:
Inventor:
Nan-Hsiung Yeh, Foster City, CA (US);
Assignee:
Ampex Corporation, Redwood City, CA (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ; G11C / ; G11B / ;
U.S. Cl.
CPC ...
360113 ; 365158 ;
Abstract
Two closely spaced magnetostatically coupled magnetoresistive elements are arranged with their respective planar surfaces in parallel. A nonmagnetic insulating material is interposed between the elements to prevent exchange coupling. Sense current flows simultaneously through both elements in the same direction and in perpendicular to the easy axis of magnetization. In response to signal fields applied in parallel with the sense current flow demagnetization components in the easy axis direction cancel. The output signal of the transducer is independent of recording track width and free of Barkhausen noise.