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:
Apr. 08, 1980
Filed:
Aug. 25, 1978
Yoshimi Watanabe, Yokohama, JP;
Sony Corporation, Tokyo, JP;
Abstract
In a video signal reproducing system, a head-position control circuit includes a magnetic head scanning a magnetic recording medium for recording and reproducing signals in a recorded track thereon; a head-support member including a piezo-ceramic element supporting the magnetic head ona rotary part, for example of a guide drum; a rotary transformer having a primary coil in a stationary part and a secondary coil in the rotary part; a control signal generator for producing a tracking control signal which corresponds to the signal due to the mis-tracking of the magnetic head relative to a predetermined section of the recorded track, the head-support member being responsive to the tracking control signal to displace the magnetic head transversely with respect to the track section to maintain substantial alignment between the magnetic head and the track section; the tracking control signal being supplied to the primary coil of the rotary transformer; and a control signal processing circuit connected between the secondary coil of the rotary transformer and the head-support member.