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. 19, 1993
Filed:
Dec. 16, 1991
Applicant:
Inventors:
Erich P Valstyn, Los Gatos, CA (US);
Daniel A Nepela, San Jose, CA (US);
Assignee:
Read-Rite Corp., Milpitas, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ; G11B / ;
U.S. Cl.
CPC ...
360126 ; 360113 ; 360125 ;
Abstract
A thin film read-write magnetic head includes a write inductive section having a magnetic circuit consisting of thin film magnetic layers and a read flux sensing element, such as a magnetoresistive device or Hall effect device, located in a gap in the magnetic circuit. During the write mode, a magnetic valve including an electrical conductor provides a shunt path to bypass the flux sensing element. During the read mode, a saturation current is directed to the valve conductor so that the shunt path is open, thereby allowing the flux sensing element to sense the readout signal.