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:
Sep. 07, 1982
Filed:
Nov. 10, 1980
Applicant:
Inventor:
Alain H d'Hautecourt, Prospect Heights, IL (US);
Assignee:
Zenith Radio Corporation, Glenview, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04N / ;
U.S. Cl.
CPC ...
358160 ; 358167 ;
Abstract
An AC signal processing circuit fabricated on a single integrated circuit chip used in a television receiver is both defeated and the DC level characterizing its output terminal is controlled in response to a manually operable switch communicating with a single input pin of the chip. A control circuit comprising a pair of differential amplifiers fabricated on the chip is responsive to the switch for enabling the AC signal processing circuit or, alternatively, for inhibiting the circuit while simultaneously causing its output to assume a controlled DC level.