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:
Apr. 10, 1979
Filed:
Dec. 22, 1977
John D Lovely, Batavia, NY (US);
GTE Sylvania Incorporated, Stamford, CT (US);
Abstract
Disclosed herein are a circuit and a method for providing an appropriately-timed signal to the input of a chrominance burst gate. Horizontal synchronizing pulses are differentiated and clipped so that positive-going, exponentially decaying pulses are developed substantially coincidentally with the chrominance burst signal. The resultant pulses are then applied to one terminal of a switch. Horizontal flyback pulses are phase-delayed so that their peak amplitude occurs during the burst period. The phase-delayed pulses are applied to another terminal of the switch so that resultant pulses are shorted to ground except during a predetermined portion of the horizontal flyback period. As a result, a burst gating signal having a pulse width effectively equal to and coincident with the burst signal period is generated and applied to the input of the burst gate.