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:
May. 16, 2006
Filed:
Dec. 08, 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 CMOS variable gain amplifier. The variable gain amplifier comprises a first means for first and second differential input voltages, a second means for controlling its transconductance to generate an output current according to a control voltage, a third means for a bias voltage to generate bias current by current mirror, and to supply a stabilized bias current to the second means using the replica current, and a fourth means for generating an output voltage with a variable gain according to control voltage by its output current generated in the second means. Therefore, the present invention provides a function of controlling low distortion and high linearity in low voltage and a high-speed operation by the supply of a stabilized sharing current bias, and can control a voltage gain in a wide range by the control voltage.