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. 04, 1984
Filed:
Feb. 10, 1982
Masahiko Tsuruta, Yokohama, JP;
Victor Company of Japan, Ltd., Kanagawa, JP;
Abstract
A tracking control system in a magnetic recording and reproducing apparatus having one or a plurality of rotary heads for reproducing a signal by successively scanning oblique tracks on a magnetic tape, comprises a head moving mechanism for moving at least one rotary head along a direction of its height, a head moving signal applying circuit for generating a head moving signal in the form of a square wave which rises and falls for every 2nT (n is an integer, and T is a period in which one rotary head scans one track) period, when the rotary head scans the track with the same scanning pattern in units of 2nT period, to apply this head moving signal to the head moving mechanism, and a tracking control circuit for comparing a level of a reproduced signal at a position separated by a predetermined distance from an end part of the reproduced signal track by scanning the track in a state where the rotary head is moved to one side by the head moving mechanism, and a level of a reproduced signal at a position separated by the predetermined distance from an end part of the reproduced signal track by scanning the track in a state where the rotary head is moved to the other side by the head moving mechanism, to detect the tracking error, and obtaining a control signal from a detected output to apply the control signal to the head moving mechanism.