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. 15, 1982
Filed:
Nov. 13, 1980
Theodore S Rzeszewski, Lombard, IL (US);
Matsushita Electric Corporation, Franklin Park, IL (US);
Abstract
An automatic equalization circuit for a television receiver utilizes a portion of the VIR signal appearing in the conventional composite television signal as the training signal for the equalization circuit. A transversal filter in the form of a charge coupled device (CCD) clocked by a voltage controlled oscillator is used as the delay line for the equalization circuit. The output taps of the CCD are coupled through analog multipliers which, in turn, are provided with an error signal produced by the comparison between a reference signal and the output of an adder circuit connected to the outputs of all of the analog multipliers to vary the outputs of the analog multipliers in accordance with an error signal produced by the comparison circuit. The system also replaces the usual luminance delay line of a color television receiver, and the center tap of the CCD provides the delay normally imparted to the luminance signal components in such a receiver.