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, 2010
Filed:
Nov. 19, 2007
Toshitaka Matsunaga, Ome, JP;
Masahide Yatsu, Akishima, JP;
Hideo Sado, Ome, JP;
Katsuki Ueda, Tachikawa, JP;
Shouji Nakajima, Kodaira, JP;
Seiji Mizukoshi, Nishitama-gun, JP;
Shinichirou Kouhara, Hino, JP;
Toshitaka Matsunaga, Ome, JP;
Masahide Yatsu, Akishima, JP;
Hideo Sado, Ome, JP;
Katsuki Ueda, Tachikawa, JP;
Shouji Nakajima, Kodaira, JP;
Seiji Mizukoshi, Nishitama-gun, JP;
Shinichirou Kouhara, Hino, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
According to one embodiment, there is to provide a disk drive which calculates an error in the position of a head on the basis of concentric servo patterns. The disk drive has a disk medium on which spiral servo patterns are recorded and a read head which reads the spiral servo patterns from the disk medium. A servo controller reproduces a hexagonal burst signal from the spiral servo patterns read by the read head to generate position data associated with servo burst signals. The CPU uses the position data to perform a position error calculation.