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:
Dec. 03, 2002
Filed:
Dec. 22, 1998
Hiroaki Suzuki, Machida, JP;
Koji Kurachi, Yokohama, JP;
Katsumi Suda, Yamato, JP;
Hideo Asano, Machida, JP;
Kenji Okada, Yokohama, JP;
Makoto Takase, Yamato, JP;
Akira Kibashi, Zama, JP;
Hiromi Nishimiya, Sagamihara, JP;
Takao Matsui, Yamato, JP;
Tatsuya Endo, Fujisawa, JP;
Kenji Kuroki, Fujisawa, JP;
International Business Machines Corporation, Armonk, NY (US);
Abstract
A method and apparatus for recovering from operation errors arising in an information recording and reproducing unit using a head with a GMR sensor is described. The read and write operations of the unit comprise executing a first error recovery procedure for recovering the operation error, executing a first GMR evaluation procedure for evaluating the performance of the GMR sensor when the operation error cannot be recovered by the first error recovery procedure, and applying a resetting pulse to the GMR sensor in accordance with the first GMR evaluation procedure.