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:
Aug. 03, 1999
Filed:
Jun. 20, 1997
Applicant:
Inventors:
Samuel Alfred Tiller, Ottawa, CA;
George Khoury, Ottawa, CA;
Assignee:
Nortel Networks Corporation, Montreal, CA;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04B / ; H03F / ;
U.S. Cl.
CPC ...
455333 ; 455323 ; 455326 ; 330254 ;
Abstract
The functionality of a variable gain controlled amplifier and a tree mixer are combined to provide a variable gain controlled mixer. In constructing the combination, both the current-to-voltage conversion output stage of the mixer, and the voltage-to-current conversion input stage of the variable gain amplifier are removed. Both the variable gain stage and the mixing stage are connected in parallel to modify the input current. Other configurations are provided, including a single balanced mixer, and a folded mixer.