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. 04, 1991
Filed:
Apr. 19, 1989
Kengo Shiiba, Nara, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
A yoke type thin-film magneto-resistive heat includes a magneto-resistive element that detects the magnetic field generated in the magnetic recording medium as resistance changes, a yoke, that leads magnetic flux from the head gap to the above mentioned magneto-resistive element, a DC magnetic field application system, that applies a desirable weak magnetic field to the above mentioned longitudinal direction of the magneto-resistive element, and a conductor, that applies a desirable bias magnetic field to the above mentioned magneto-resistive element in the strip width direction. The easy axis of magnetization of the magneto-resistive element is inclined in a range of 20.degree.-40.degree. to the mentioned longitudinal direction of the magneto-resistive element, so that, anisotropic angle dispersion conditions are relaxed, at the same time, by applying a desirable bias magnetic field to the magneto-resistive element in the strip width direction. Also, by shifting the operating point to a point having excellent linearity, Barkhausen noise, caused by magnetization switching generated in the magnetic field area with the same direction as the bias magnetic field direction, can be suppressed, and the reproducing output signal can be of high fidelity.