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:
Mar. 28, 2000
Filed:
May. 08, 1997
Mehrdad Nayebi, Palo Alto, CA (US);
Duc Ngo, San Jose, CA (US);
Sony Corporation, Tokyo, JP;
Sony Electronics, Inc., Park Ridge, NJ (US);
Abstract
A burst gate pulse generator circuit generates a burst gate pulse signal representative of a time period during which a burst signal is present within a composite video signal without requiring external components. Each period of the composite video signal includes a horizontal synchronization signal pulse, a burst signal and a video information signal. A pair of integrated capacitors are discharged during the horizontal synchronization pulse. The capacitors are charged at different rates by two current sources after the horizontal synchronization pulse. A first amount of charge across a first capacitor rises above a predetermined threshold level in a first time period. The burst gate pulse signal is activated when the first amount of charge rises above the predetermined threshold level. This occurs before the burst signal is present within the composite video signal. A second amount of charge across a second capacitor rises above the predetermined threshold level in a second time period. The burst gate pulse signal is deactivated when the second amount of charge rises above the predetermined threshold level. This occurs after the burst signal is complete within the composite video signal.