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:
Dec. 20, 1994
Filed:
Apr. 15, 1993
Applicant:
Inventor:
Benjamin F Weigand, Ellicott City, MD (US);
Assignee:
Westinghouse Electric Corporation, Pittsburgh, PA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04N / ;
U.S. Cl.
CPC ...
348707 ; 330 98 ; 330104 ; 3301 / ; 330293 ;
Abstract
A video amplifier having a reduced noise figure is realized by eliminating the need for a resistive matching termination at the input of the amplifier. A negative feedback loop reduces the effective input impedance of the amplifier by generating an active impedance at the input of the amplifier. Because the input impedance of the amplifier is actively matched to the output impedance of the video signal generator, a noise-generating resistive termination is unnecessary, and the noise figure of the overall impedance-matched amplifier is significantly reduced.