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

fYear

2011

Firstpage

825

Lastpage

828

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 G_m 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 G_m = 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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/ECCTD.2011.6043832

Filename

6043832