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:
Feb. 14, 1989
Filed:
Dec. 08, 1986
Applicant:
Inventors:
Assignee:
U.S. Philips Corporation, New York, NY (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04N / ;
U.S. Cl.
CPC ...
358160 ; 358139 ; 358148 ;
Abstract
Control circuit for calibrating a delay line for a television receiver. The delay line contains series-connected all-pass sections of at least 2nd-order, the inductances of which are replaced by gyrators to which capacitances are connected. During at least one line of the vertical blanking period, the delay line is included into a phase-lock loop for comparison with a line-frequency signal in order to control the delay time of the all-pass sections.