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:
Oct. 21, 1986
Filed:
Mar. 12, 1984
H George Pires, Parlin, NJ (US);
Other;
Abstract
When the output of a number of color television signal generators is to be combined, all of these outputs must be correctly timed with respect to one another. To accomplish this, the output of a signal generator is applied to a phase-adjusting device and then to a sync separator. Horizontal synchronization pulses and/or color bursts are separated from the signal and applied to a switcher which alternately supplies these synchronization signals and reference synchronization signals to an adder circuit. The other input of the adder receives the incoming signal without the synchronization signals to be timed. The output of the adder is thus the incoming television signal, but with reference synchronization pulses substituted for its synchronization pulses half the time. The output of the adder is then applied to a monitor. The display on the monitor has a distinct flicker when the synchronization pulses of the incoming signal are not in phase with the reference synchronization pulses. An operator then removes the flicker by adjusting the phase-adjusting device. If the switches controlled by an oscillator having a randomly varying frequency, the display on the monitor will be scrambled and the phase will be adjusted to unscramble the picture.