Title :
Implementation of a CMOS LNA plus mixer for GPS applications with no external components
Author :
Svelto, Francesco ; Deantoni, Stefano ; Montagna, Giampiero ; Castello, Rinaldo
Author_Institution :
Dipartimento di Ingegnaria, Univ. di Bergamo, Dalmine, Italy
Abstract :
A fully differential 0.35-/spl mu/m CMOS LNA plus mixer, for GPS applications, using no external component apart from an input balun, has been realized. The LNA makes use of an inductively degenerated input stage and a resonant LC load, featuring 12% frequency tuning, accomplished by a MOS varactor. The mixer is a Gilbert cell type in which an NMOS and a PMOS differential pair, shunt 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 supply.
Keywords :
CMOS analogue integrated circuits; Global Positioning System; UHF amplifiers; UHF integrated circuits; UHF mixers; differential amplifiers; low-power electronics; 0.35 micron; 1.3 GHz; 2.8 V; 3.8 dB; 40 dB; 8 mA; GPS; Gilbert cell mixer; RF front-end; differential CMOS LNA; low-power design; Frequency measurement; Gain measurement; Global Positioning System; Impedance matching; Linearity; MOS devices; Resonance; Topology; Tuning; Varactors;
Journal_Title :
Very Large Scale Integration (VLSI) Systems, IEEE Transactions on
