A low-voltage low-power wideband CMOS variable gain amplifier using active negative feedback

Author

Sakphrom, Siraporn ; Thanachayanont, Apinunt ; Khumsat, Phanumas

Author_Institution

Fac. of Eng., King Mongkut´´s Inst. of Technol. Ladkrabang, Bangkok

fYear

2009

fDate

8-11 Feb. 2009

Firstpage

1

Lastpage

4

Abstract

This paper describes the design and realization of a low-voltage low-power RF variable gain amplifier in a 0.18 um CMOS technology. The proposed amplifier employs an active negative feedback technique to achieve wide bandwidth operation. Simulation results showed that the proposed circuit could achieve 1.78-GHz bandwidth with 13.04-dB gain under a single 1-V power supply voltage, while draining current less than 500 muA.

Keywords

CMOS integrated circuits; circuit feedback; low-power electronics; radiofrequency amplifiers; wideband amplifiers; CMOS technology; active negative feedback; bandwidth 1.78 GHz; low-voltage low-power RF variable gain amplifier; size 0.18 mum; voltage 1 V; wide bandwidth operation; Bandwidth; Broadband amplifiers; CMOS technology; Circuit simulation; Gain; Negative feedback; Operational amplifiers; Power supplies; Radio frequency; Radiofrequency amplifiers;

fLanguage

English

Publisher

ieee

Conference_Titel

Intelligent Signal Processing and Communications Systems, 2008. ISPACS 2008. International Symposium on

Conference_Location

Bangkok

Print_ISBN

978-1-4244-2564-8

Electronic_ISBN

978-1-4244-2565-5

Type

conf

DOI

10.1109/ISPACS.2009.4806728

Filename

4806728