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. 23, 1988
Filed:
Oct. 02, 1986
Christopher W Mathewson, Rochester, NY (US);
Eastman Kodak Company, Rochester, NY (US);
Abstract
In a floppy disk drive, the head position is controlled in accordance with prerecorded sets of sinusoidal bursts recorded first on the right side of each track and then on the left side of each track in the narrow separation space between each pair of adjacent disk sectors. The serial bursts are peak detected and then integrated by the same peak detector and the same integrator, the integrals of the right and left bursts being substracted and transmitted to the head tracking servo as a position error signal. The process of peak detecting prior to integration removes the detected wave shape (which changes with track radius) as a factor in the position error computation, thus eliminating dependency of the error computation on the track radius. Using a single channel--the same peak detector and the same integrator--to process both the right and left hand sinusoid bursts eliminates offset errors in the tracking error computation characteristic of dual channel devices.