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. 01, 1985
Filed:
Apr. 12, 1983
Applicant:
Inventor:
Akiyuki Yoshisato, Soma, JP;
Assignee:
Alps Electric Co., Ltd., , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04N / ; H04N / ;
U.S. Cl.
CPC ...
358172 ; 358173 ; 307540 ; 307542 ; 307559 ;
Abstract
A video clamping circuit adapted for satellite communication includes an operational amplifier for detecting the current flowing into a diode connected to the input terminal of the buffer amplifier of the circuit. The circuit further includes rectifying and smoothing elements for deriving a DC voltage from the output from the operational amplifier and adding the DC voltage to the signal of the output stage of the buffer amplifier in an anti-phase relation, so that an energy dispersal signal superimposed on a video signal is removed and waveform distortion is minimized.