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. 14, 1980
Filed:
Jun. 20, 1979
John D Lovely, Batavia, NY (US);
GTE Products Corporation, Stamford, CT (US);
Abstract
A circuit for generating an accurately-timed noise-free signal for gating the chrominance burst portion of the composite video signal. The horizontal sync pulses are differentiated and clamped to the horizontal blanking pulses. The output pulses are then applied to a gating diode that is conductive only when those pulses have an amplitude above a predetermined bias level. The resultant pulses are coupled to the input of a burst gate so that the gate is open only for a period of time substantially coterminous with the burst period. The burst gate is thereby rendered immune to noise signals occurring during the active line period and the accuracy of the gating signal is independent of the television receiver's horizontal time base.