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:
Oct. 27, 1981
Filed:
Feb. 26, 1979
Applicant:
Inventors:
Harald Melwisch, Vienna, AT;
Hendrikus Looren de Jong, Eindhoven, NL;
Assignee:
U.S. Philips Corporation, New York, NY (US);
Primary Examiner:
Int. Cl.
CPC ...
G11B / ; G11B / ;
U.S. Cl.
CPC ...
360 70 ; 360 75 ; 360 77 ;
Abstract
In a helical scan recorder using multiple heads having gaps positioned at different aximuth angles tracking errors are detected by signal processing the normal synchronization pulses recorded with the television signal. The signal processing is accomplished by using a phase shift detection circuit and a difference circuit for subtracting signals from the phase shift circuit indicating the instantaneous phase shifts produced by the tracking errors.