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:
Sep. 26, 1995
Filed:
May. 11, 1993
Applicant:
Inventors:
Assignee:
Canon Denshi Kabushiki Kaisha, Saitama, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11B / ; G11B / ;
U.S. Cl.
CPC ...
360 7710 ; 360 7780 ; 360 77120 ;
Abstract
A servo pattern arrangement for controlling the position of a head has a first pattern, in which two frequency signal having different frequencies are arranged alternately in the width direction of a track in a two-track cycle. The servo pattern arrangement also has a second pattern which is repeated in a cycle of n tracks. The first and the second patterns are arranged in the longitudinal direction of the tracks so as to create a servo pattern arrangement with a wide servo capture range and so as to also ensure accurate detection.