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. 28, 1988
Filed:
Nov. 22, 1985
Karl-Heinz Matthies, Hamburg, DE;
U.S. Philips Corporation, New York, NY (US);
Abstract
A circuit arrangement for deriving a control signal from a synchronizing signal whose phase alternates in a predetermined sequence, which control signal is independent of the phase alternation, comprises a reference oscillator (1) which supplies a reference signal, a phase comparator (5) for deriving a phase signal from a synchronizing signal and a reference signal, a correction circuit (22, 26) for generating a correction signal, and a logic combination device (10) for superimposing the phase signal and the correction signal on the control signal. In accordance with the invention control signal variations as a result of the phase alternations in the synchronizing signal are eliminated in that the correction circuit (22, 26) generates a polarity signal which dictates the polarity of the correction signal by comparing the phase of the reference signal and the phase of the synchronizing signal.