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. 09, 2003
Filed:
Feb. 13, 2002
Applicant:
Inventors:
Pietro Filoramo, Siracusa, IT;
Tiziano Chiarillo, Ruffano, IT;
Assignee:
STMicroelectronics S.r.l., Agrate Brianza, IT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03F 3/45 ;
U.S. Cl.
CPC ...
H03F 3/45 ;
Abstract
A variable gain amplifier is described which comprises a first device to which a first control signal (Vc, Vc ) is applied so that the gain (Ai Ai) of an output signal (iout, io) of the first device ( Q -Q ) with respect to a first input signal (in, i ir) is a function of the exponential type of the first control signal (Vc, Vc ). The amplifier comprises a feedback network ( Q -Q ) connected between an output terminal and an input terminal of the first device ( Q -Q ) so as to assure that the gain (Ai) in decibel of the first device ( Q -Q ) is a linear function of the first control signal (Vc ).