Title :
Low-voltage low-power 200MHz variable gain amplifier in CMOS 0.35μm
Author :
Alegre, J.P. ; Celma, S. ; Calvo, B. ; Otín, A.
Author_Institution :
Group of Electron. Design (13 A), Univ. of Zaragoza, Zaragoza
Abstract :
A novel low-voltage 0.35 mum CMOS variable gain amplifier (VGA) is proposed in this paper for intermediate- frequency (IF) strips. The proposed circuit is based on a multiplier cell with improved linearity and consumes only 1.5 mA from a single 1.8 V power supply voltage. It shows 36 dB of continuous gain setting with a linearity error below 1 dB and an almost constant bandwidth of 200 MHz. The third-order intermodulation distortion (IM3) is below -68 dB for a 0.4 Vpp 50 MHz differential output signal. The input-referred noise is 12 nV/sqrt(Hz) under maximum gain setting and 200 MHz bandwidth.
Keywords :
CMOS analogue integrated circuits; amplifiers; intermodulation distortion; CMOS; bandwidth 200 MHz; current 1.5 mA; intermediate-frequency strips; size 0.35 mum; third-order intermodulation distortion; variable gain amplifier; voltage 1.8 V; Bandwidth; CMOS technology; Circuits; Energy consumption; Intermodulation distortion; Linearity; Performance gain; Power supplies; Strips; Voltage;
Conference_Titel :
Circuit Theory and Design, 2007. ECCTD 2007. 18th European Conference on
Conference_Location :
Seville
Print_ISBN :
978-1-4244-1341-6
Electronic_ISBN :
978-1-4244-1342-3
DOI :
10.1109/ECCTD.2007.4529523
