US Patent 7362525 PRML based magnetic servo position demodulator

Patent 7362525 was granted and assigned to Quantum Corporation on April, 2008 by the United States Patent and Trademark Office.

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Is a

Patent

Patent attributes

Current Assignee

Quantum Corporation

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

73625250

Date of Patent

April 22, 2008

Patent Application Number

111881990

Date Filed

July 22, 2005

Patent Primary Examiner

‌

Andrea Wellington

Patent abstract

Apparatuses and methods for detecting reference marks on magnetic data storage mediums are described herein. In one variation, the apparatus comprises a magnetic servo position demodulator operable to extract information from the magnetic data storage medium utilizing Partial Response/Maximum Likelihood (PRML) technique. Synchronization marks stored within the PRML channel is then detected utilizing a digital filter. For each of the detected synchronization mark, a further refined position of the synchronization mark can be determined utilizing a mathematical prediction model.