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:
Jul. 18, 1978
Filed:
Mar. 28, 1977
Applicant:
Inventor:
Vasil Uzunoglu, Ellicott City, MD (US);
Assignee:
Communications Satellite Corporation, Washington, DC (US);
Primary Examiner:
Int. Cl.
CPC ...
G06G / ;
U.S. Cl.
CPC ...
364841 ; 307229 ; 307304 ; 328160 ; 333 18 ;
Abstract
An operational amplifier uses p- and n-channel enhancement type MOSFETs as variable input resistors on the inverting and non-inverting legs, respectively, of the amplifier, and the sources and gates of the MOSFETs are tied together. By using V.sub.S, the source-to-ground voltage, and V.sub.GS, the gate-to-source voltage, as input signals, the device will perform 4-quadrant multiplication at operating frequencies as high as 400MHz.