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:
Sep. 04, 1991
Richard L Galbraith, Rochester, MN (US);
Daniel D Reno, Rochester, MN (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A method and apparatus for modulating a data reference clock for rotational speed variations of the data storage disk in a direct access data storage file. A data reference clock is generated from an encoded disk rate clock of the data file. A readback signal from at least one predetermined region of the disk surface is sensed and a sync byte is detected responsive to the readback signal. An early window control signal and a late window control signal are generated corresponding to end boundaries for capturing readback encoded data signals. A load complete signal is identified responsive to the readback signal. The identified load complete signal with the early window control signal and the late window control signal and the generated data reference clock is adjusted responsive to overlapping compared signals.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile