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. 25, 2018
Filed:
Dec. 07, 2016
Applicant:
Xilinx, Inc., San Jose, CA (US);
Inventor:
Mohamed N. Elzeftawi, San Jose, CA (US);
Assignee:
XILINX, INC., San Jose, CA (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
H03F 3/45 (2006.01); H03G 3/30 (2006.01); H03G 1/00 (2006.01);
U.S. Cl.
CPC ...
H03G 3/30 (2013.01); H03F 3/45192 (2013.01); H03F 2203/45018 (2013.01); H03F 2203/45026 (2013.01);
Abstract
An integrated circuit and method for providing a variable gain amplifier are disclosed. One embodiment of the a variable gain amplifier comprises at least one load, a cascode circuit coupled to the load, a folded-gilbert stage, coupled to the cascode circuit, the folded-gilbert stage comprising a main differential pair of transistors and an internal pair of transistors, and a digital to analog converter, coupled to the folded-gilbert stage, for steering currents between the main differential pair of transistors and the internal pair of transistors to change a gain of the variable gain amplifier.