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:
Nov. 01, 2005
Filed:
Feb. 13, 2003
Keiji Shimatani, Kawasaki, JP;
Keiji Shimatani, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A head position control method controls the speed of the head using the position and the speed detected from the servo information on the disk and directly detects the head speed. The speed detection pattern is assigned to the servo area of the disk, and the speed of the head is detected at the frequency of the regeneration signal. Therefore the speed of the head can be directly detected at the timing of the servo reading. By this, information on the head speed can be obtained with less error. Since there is no delay in the speed detection, the phase margin of the control system increases and stability improves.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile