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:
Jul. 24, 2001
Filed:
Nov. 12, 1999
Kenichi Hase, Yokohama, JP;
Syoichi Miyazawa, Yokohama, JP;
Ryutaro Horita, Yokohama, JP;
Shinichi Kojima, Takasaki, JP;
Akihiko Hirano, Fujisawa, JP;
Akira Uragami, Takasaki, JP;
Hitachi, Ltd, Tokyo, JP;
Abstract
A magnetic disk storage apparatus having a magnetic disk-type storage medium; a head for reading data recorded on the magnetic disk-type storage medium, a processor, a phase synchronizing circuit having a controllable response characteristic and for outputting a clock signal to handle the data read from the magnetic disk-type storage medium, and a memory for storing information to control the response characteristic of the phase synchronizing circuit previously set in accordance with an access position on the magnetic disk-type storage medium. The processor generates the access position on the magnetic disk-type storage medium and data for commanding the control of the response characteristic of the phase synchronizing circuit in accordance with the information stored in the memory, and commands the control of the response characteristic by the data for the command, at a time consistent with a time of a seek operation of the head for the access position on the magnetic disk-type storage medium or a time before the seek operation of the head. Further, the response characteristic is controlled by the command.