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:
Nov. 10, 1981
Filed:
Mar. 15, 1979
Josef Sochor, Darmstadt, DE;
Winfried Horstmann, Griesheim, DE;
Hubert Foerster, Darmstadt-Eberstadt, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
Since frequency modulated signals such as color television signals are subject to amplitude changes as well as timing changes if the playback speed is not the same as the recording speed, a variable gain amplifier is provided. The gain of the variable gain amplifier is controlled by an error signal which corresponds to a measured difference between the recording and playback speed. The measured difference is derived from a phase comparison of separated color bursts and of the same bursts delayed by one line period. The amplitude corrected signals at the output of the variable gain amplifier are also applied to an amplitude measuring stage 16 whose output in turn controls the frequency characteristic of a filter filtering the color television signals prior to demodulation.