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:
Sep. 28, 1999
Filed:
Dec. 28, 1995
Yoshihiko Deoka, Tokyo, JP;
Sony Corporation, Tokyo, JP;
Abstract
A method and apparatus for tracking control of a magnetic head having information signals and tracking signals recorded on a plurality of slanted tracks measures a time duration from a time when a rotary head drum passes a reference position to a time when the head starts to reproduce the tracking signal. The measured time duration and a reference value are compared to determine whether the difference falls within a predescribed range and the relative speed between the transporting speed of the tape and the peripheral speed of the rotary head drum is controlled based on the comparison results when the determination results falls within the prescribed ranged. The reference value is continuously monitored and updated from a memory when the measured difference exceeds a predetermined value.