A wideband IM3 cancellation technique using negative impedance for LNAs with cascode topology

Author

Cheng, Wei ; Annema, Anne Johan ; Wienk, Gerard J M ; Nauta, Bram

Author_Institution

IC Design Group, Univ. of Twente, Enschede, Netherlands

fYear

2012

fDate

17-19 June 2012

Firstpage

13

Lastpage

16

Abstract

A negative impedance is used to enable distortion cancellation between the transconductor and the cascode transistor for LNAs with a cascode topology. As a proof of concept, a resistive feedback LNA using this IM3 cancellation technique in a standard 0.16μm CMOS process shows that for 0.1GHz to 1GHz, improvements of 6.3dB to 10dB for IIP3 and 0.2dB to 1dB for gain are achieved without noise degradation. The power consumption for the LNA is increased by 2%, and the die area by about 700μm².

Keywords

CMOS analogue integrated circuits; UHF amplifiers; UHF integrated circuits; low noise amplifiers; cascode topology; cascode transistor; distortion cancellation; frequency 0.1 GHz to 1 GHz; gain 0.2 dB to 1 dB; negative impedance; power consumption; resistive feedback LNA; size 0.16 mum; standard CMOS process; transconductor; wideband IM3 cancellation technique; Impedance; Noise; Noise measurement; Nonlinear distortion; Radio frequency; Semiconductor device measurement; Transistors; CMOS; IIP3; IM3 cancellation; Low-noise amplifier (LNA); cascode transistor; intermodulation distortion; output conductance nonlinearity;

fLanguage

English

Publisher

ieee

Conference_Titel

Radio Frequency Integrated Circuits Symposium (RFIC), 2012 IEEE

Conference_Location

Montreal, QC

ISSN

1529-2517

Print_ISBN

978-1-4673-0413-9

Electronic_ISBN

1529-2517

Type

conf

DOI

10.1109/RFIC.2012.6242221

Filename

6242221