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:
Jan. 06, 2004
Filed:
Sep. 12, 2000
Charles H. Sobey, Plano, TX (US);
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
According to a broad aspect of the invention, a method and apparatus are presented for identifying a track ( ) of a rotating disk ( ) of a mass data storage device ( ), using EPR4 data detection techniques. The track identification indicia ( ) may be written more densely than the track identification indicia would have been written without using EPR4 data equalization techniques, wherein track identification indicia pulses ( ) may at least partially overlap. The identification indicia ( ) is read from the disk ( ) using a read head ( ), and processed using EPR4 data equalization techniques in an EPR4 Viterbi detector ( ). The Viterbi detector ( ) may be used also to detect data pulses ( ) by switching its mode of operation from a track identification mode to a data detection mode.