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:
Aug. 04, 1992
Filed:
Nov. 20, 1990
Gerhard Pletz-Kirsch, Hamburg, DE;
Jurgen Lenth, Hamburg, DE;
U.S. Philips Corporation, New York, NY (US);
Abstract
A digital synchronizing arrangement for a picture display device includes a synchronizing signal separator stage in which horizontal sync pulses are derived from a digital television signal applied to the synchronizing arrangement and which includes a horizontal synchronizing signal. A phase-locked loop receives the horizontal sync pulses for its synchronization. For the purpose of suppressing signal disturbances, a pulse of a first switching signal derived from the phase-locked loop is generated each time at the expected instants of the horizontal sync pulses. Furthermore, a pulse of a second switching signal is generated each time in a predetermined time interval after each pulse of the first switching signal. The first horizontal sync pulse which occurs during a pulse of the first switching signal is applied to the phase-locked loop, whereas horizontal sync pulses subsequently occurring in the interval until the next pulse of the second switching signal are not applied to the phase-locked loop. All horizontal sync pulses subsequently occurring until the next pulse of the first switching signal are applied to the phase-locked loop if no horizontal sync pulse appeared during the pulse of the first switching signal.