Title :
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
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;
Conference_Titel :
Radio Frequency Integrated Circuits Symposium (RFIC), 2012 IEEE
Conference_Location :
Montreal, QC
Print_ISBN :
978-1-4673-0413-9
Electronic_ISBN :
1529-2517
DOI :
10.1109/RFIC.2012.6242221
