Title :
Low noise transconductance amplifier design for continuous-time ΣΔ wideband frontend
Author :
Duong, Quoc-Tai ; Døbrowski, Jerzy J.
Author_Institution :
Dept. of Electr. Eng., Linkoping Univ., Linköping, Sweden
Abstract :
A low-noise transconductance amplifier (LNTA) aimed at continuous-time ΣΔ wideband frontend is presented. In this application, the LNTA operates with a capacitive load to provide high linearity and sufficient Gm gain over a wide frequency band. By combination of various circuit techniques the LNTA, which is designed in 65nm CMOS, achieves in simulation the noise figure less than 1.35 dB and linearity of maximum IIP3 = 13.6 dBm over 0.8 - 5 GHz band. The maximum transconductance Gm = 11.6 mS, the return loss S11 <; -14 dB while the total power consumption is 3.9 mW for 1.2 V supply.
Keywords :
CMOS integrated circuits; continuous time systems; low noise amplifiers; operational amplifiers; radio receivers; sigma-delta modulation; CMOS process; capacitive load; continuous-time ΣΔ wideband frontend; frequency 0.8 GHz to 5 GHz; low noise transconductance amplifier design; power 3.9 mW; size 65 nm; voltage 1.2 V; CMOS integrated circuits; Gain; Linearity; Noise; Noise figure; Transconductance; Wideband; Low-noise transconductance amplifier (LNTA); continuous-time ΣΔ RF frontend; high linearity LNA; wideband LNA;
Conference_Titel :
Circuit Theory and Design (ECCTD), 2011 20th European Conference on
Conference_Location :
Linkoping
Print_ISBN :
978-1-4577-0617-2
Electronic_ISBN :
978-1-4577-0616-5
DOI :
10.1109/ECCTD.2011.6043832
