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:
Dec. 11, 1984
Filed:
Jun. 04, 1982
Applicant:
Inventor:
Ben Alaimo, Campbell, CA (US);
Assignee:
Syquest Technology, Fremont, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ; G11B / ; G11B / ;
U.S. Cl.
CPC ...
360 77 ; 360 78 ;
Abstract
Servo control apparatus including a recording head to read first and second servo data bytes stored across a track on opposite sides of a track centerline, a servo demodulator to count the first and second bytes and produce a resultant count representing any offset of the head relative to the centerline, a head positioner to move the head, and a microcomputer which controls the head positioner to position the head in response to the resultant count. The invention is implemented digitally, is simple and inherently compensates for expansion or contraction of the track to accurately center the head.