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:
Aug. 18, 2009
Filed:
Apr. 22, 2008
Darren William Karns, Evans City, PA (US);
Mark David Bedillion, Allison Park, PA (US);
Qiang Ling, Pittsburgh, PA (US);
Mehmet Fatih Erden, Pittsburgh, PA (US);
Darren William Karns, Evans City, PA (US);
Mark David Bedillion, Allison Park, PA (US);
Qiang Ling, Pittsburgh, PA (US);
Mehmet Fatih Erden, Pittsburgh, PA (US);
Seagate Technology LLC, Scotts Valley, CA (US);
Abstract
A method and system determines the position of a transducer head based on permanent servo marks in which the width of the permanent servo marks is greater than the width of the data tracks they are used to identify. The method includes receiving readback signals in response to the permanent servo marks arranged as a number of null bursts and generating position error signals with respect to each null burst. Region based information is extracted based on the position error signals, and the region based information is used in conjunction with the position error signals to generate region-based displacement estimates with respect to each null burst. The region-based estimates are then combined to generate a final displacement estimate that describes the estimated distance between a transducer head and the centerline of a desired data track.