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:
Apr. 07, 1987
Filed:
Nov. 14, 1985
Applicant:
Inventor:
Gary L Mattson, Thousand Oaks, CA (US);
Assignee:
Xebec Development Partners, Ltd., San Jose, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
360 77 ;
Abstract
A disk drive control system includes servo sectors written on a disk, with each sector containing three sets of marker pulses arranged so that three adjacent marker pulses from each of the sets spans two tracks. Positional control utilizes a function comprising a ratio whose denominator value represents the sum of the amplitudes of the two largest amplitude marker pulses detected by the read/write head while traversing a servo sector and who numerator represents the differences in amplitude between said two largest amplitude marker pulses.