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. 19, 1985
Filed:
Jun. 24, 1982
Applicant:
Inventor:
Herbert Elmis, Denzlingen, DE;
Assignee:
ITT Industries, Inc., New York, NY (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04N / ; H04N / ; H04N / ;
U.S. Cl.
CPC ...
358153 ; 358154 ; 358158 ; 328139 ;
Abstract
To prevent the separation-level shift occurring in the clamping circuit during the transmitted vertical synchronizing pulses or during prolonged interference pulses, a pulse opening an electronic switch (S) inserted between the clamping circuit and one RC section thereof is generated by means of a coincidence stage (KO), a gate circuit (TS), an inverter (I), and an AND gate (U). The clamping circuit is thus unblocked only during the horizontal synchronizing pulses, so that no shift of the separation level can occur during the vertical synchronizing pulses or during any interference pulses in the composite color signal (F).