Title :
Analysis and optimization of IIP2 in CMOS direct down-converters
Author :
Manstretta, D. ; Svelto, F.
Author_Institution :
Dipt. di Elettronica, Pavia Univ., Italy
Abstract :
Two mechanisms are responsible for second order intermodulation in CMOS down-converters: RF self-mixing and device non-linearity and mismatches. An intuitive model and analytical expressions are provided for both of them. A down-converter prototype, drawing 3.2 mA from a 1.8 V supply, part of a fully integrated 0.18 μm CMOS UMTS receiver front-end shows 66 dBm IIP2 and 16 dBm IIP3.
Keywords :
CMOS analogue integrated circuits; UHF frequency convertors; UHF integrated circuits; UHF mixers; circuit optimisation; integrated circuit modelling; intermodulation distortion; radio receivers; 0.18 micron; 1.8 V; 3.2 mA; CMOS direct down-converters; IIP2; RF self-mixing; RF to LO leakage; device mismatches; device nonlinearity; fully integrated CMOS UMTS receiver front-end; intuitive model; mixer design; second order intermodulation; 3G mobile communication; Bandwidth; Filters; Frequency conversion; Mixers; RF signals; Radio frequency; Receivers; Semiconductor device modeling; Tail;
Conference_Titel :
Custom Integrated Circuits Conference, 2002. Proceedings of the IEEE 2002
Print_ISBN :
0-7803-7250-6
DOI :
10.1109/CICC.2002.1012805
