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. 30, 2014
Filed:
Sep. 04, 2013
Applicant:
Kabushiki Kaisha Toshiba, Tokyo, JP;
Inventor:
Tomoyoshi Yamada, Yokohama, JP;
Assignee:
Kabushiki Kaisha Toshiba, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B 5/02 (2006.01);
U.S. Cl.
CPC ...
Abstract
According to an embodiment, a disk storage apparatus includes a disk with a servo pattern recorded thereon and a processor. The processor offsets a reader in a cross-track direction on the disk and performs a discrete Fourier transform (DFT) operation on an amplitude sequence of readback signals with respect to the cross-track direction. The processor calculates an optimal correction coefficient for a linearity correction function used for a linearity correction of a position error signal based on a result of the DFT operation.