Title :
A 0.35μm CMOS 1.8V low-power 175MHz variable gain amplifier
Author :
Alegre, J.P. ; Celma, S. ; del Pozo, J.M.G.
Author_Institution :
Univ. of Zaragoza, Zaragoza
Abstract :
A low-voltage intermediate-frequency variable gain amplifier (VGA) is proposed in this paper. The proposed circuit is based on a multiplier cell that has been improved to obtain higher linearity. Simulated in CMOS 0.35 mum technology, the VGA consumes 1.5 mA at a single 1.8 V supply. It shows a continuous gain setting from -18 up to 18 dB with a linearity error below 1 dB and an almost constant bandwidth above 175 MHz. Distortion levels (IM3) are below -70 dB at 10 MHz for a 0.4 Vp-p differential output.
Keywords :
CMOS integrated circuits; VHF amplifiers; low-power electronics; multiplying circuits; CMOS technology; frequency 175 MHz; low-power variable gain amplifier; multiplier cell; size 0.35 mum; voltage 1.8 V; Bandwidth; CMOS technology; Circuit simulation; Consumer electronics; Energy consumption; Linearity; Noise level; Performance gain; Power amplifiers; Power supplies;
Conference_Titel :
Circuits and Systems, 2007. MWSCAS 2007. 50th Midwest Symposium on
Conference_Location :
Montreal, Que.
Print_ISBN :
978-1-4244-1175-7
Electronic_ISBN :
1548-3746
DOI :
10.1109/MWSCAS.2007.4488584
