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:
Jan. 24, 2006
Filed:
Dec. 09, 2003
Chong Ki Kwon, Daejon-Shi, KR;
Gyu Hyung Cho, Daejon-Shi, KR;
Mun Yang Park, Daejon-Shi, KR;
Jong Dae Kim, Daejon-Shi, KR;
Chong Ki Kwon, Daejon-Shi, KR;
Gyu Hyung Cho, Daejon-Shi, KR;
Mun Yang Park, Daejon-Shi, KR;
Jong Dae Kim, Daejon-Shi, KR;
Abstract
Disclosed is a variable gain amplifier having low voltage, low distortion, high linearity and wideband operating characteristics. The variable gain amplifier comprises an input signal provision and variable gain controller for receiving first and second input signals via a differential pair of a cascode shape and amplifying a difference signal of the first and second input signals to output first and second differential signals, wherein the controller controls a variable voltage gain of the difference signal according to a gain control voltage signal, and a current/voltage converter for receiving the first and second differential signals outputted from the input signal provision and variable gain controller and converting the first and second differential signals into first and second output voltages of a voltage inputted type depending on first and second bias voltages, wherein the input signal provision and variable gain controller has a construction of a current inputted type or a voltage inputted type along with negative feedback connection.