Title :
An 8 mA, 3.8 dB NF, 40 dB gain CMOS front-end for GPS applications
Author :
Svelto, F. ; Deantoni, S. ; Montagna, G. ; Castello, R.
Author_Institution :
Dipt. di Ingegneria, Bergamo Univ., Pavia, Italy
Abstract :
A fully differential 0.35 μm CMOS LNA plus mixer, tailored to a double conversion architecture, for GPS applications has been realized. The LNA makes use of an inductively degenerated input stage and a resonant LC load, featuring 12% frequency tuning, accomplished by an MOS varactor. The mixer is a Gilbert cell like, in which an NMOS and a PMOS differential pair, shunted together, realize the input stage. This topology allows one to save power, for given mixer gain and linearity. The front-end measured performances are: 40 dB gain, 3.8 dB NF,-25.5 dBm IIP3, 1.3 GHz input frequency, 140 MHz output frequency, with 8 mA from a 2.8 V voltage supply.
Keywords :
CMOS analogue integrated circuits; Global Positioning System; UHF amplifiers; UHF integrated circuits; UHF mixers; circuit tuning; integrated circuit design; integrated circuit noise; low-power electronics; radio receivers; 0.35 micron; 1.3 GHz; 140 MHz; 2.8 V; 3.8 dB; 40 dB; 8 mA; CMOS front-end; GPS applications; Gilbert cell; MOS varactor; differential pair; double conversion architecture; frequency tuning; fully differential LNA; inductively degenerated input stage; low-power operation; mixer; resonant LC load; Frequency; Gain; Global Positioning System; MOS devices; Mixers; Noise measurement; Resonance; Topology; Tuning; Varactors;
Conference_Titel :
Low Power Electronics and Design, 2000. ISLPED '00. Proceedings of the 2000 International Symposium on
Print_ISBN :
1-58113-190-9
DOI :
10.1109/LPE.2000.155299
