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:
Jun. 30, 1992
Filed:
Sep. 24, 1990
Applicant:
Inventors:
Kenichi Nagasawa, Kanagawa, JP;
Hiroo Edakubo, Tokyo, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11B / ; G11B / ;
U.S. Cl.
CPC ...
360 64 ; 360 102 ; 360 70 ; 360 7715 ;
Abstract
In a rotating head type reproducing apparatus of the kind reproducing an information signal using rotating heads from a record bearing medium on which a plurality of pilot signals of different frequencies are recorded in rotation along with the information signal, one in every recording track in a predetermined sequence, the levels of pilot signals reproduced from mutually adjacent tracks by a first rotating head are compared with each other; and the result of comparison is used in detecting the tracking error of a second rotating head which is reproducing the information signal.