Title :
A 2.4–5.4-GHz Wide Tuning-Range CMOS Reconfigurable Low-Noise Amplifier
Author :
Fu, Chang-tsung ; Ko, Chun-Lin ; Kuo, Chien-Nan ; Juang, Ying-Zong
Author_Institution :
Dept. of Electron. Eng., Nat. Chiao-Tung Univ., Hsinchu
Abstract :
A 2.4-5.4-GHz CMOS reconfigurable low-noise amplifier (LNA) is designed. It consists of two stages: a broadband input stage for a steady input matching and noise performance, and a reconfigurable band-selective stage which provides a wide-range frequency tuning from 2.4 to 5.4 GHz and a 12-dB stepped gain with linearity adjustment. The frequency tuning is conducted by a multitapped switching inductor and varactors. Careful design of the switching inductor achieves consistent performance among frequency configurations. The stepped gain and linearity adjustment are provided by a size-switchable transistor with a variable biasing. Fabricated in 0.13 mum CMOS technology this LNA exhibits performance including up to 25 dB power gain, 2.2-3.1 dB noise figure and less than 5 mW power consumption under 1 V power supply.
Keywords :
CMOS integrated circuits; inductors; low noise amplifiers; micromechanical devices; power consumption; transceivers; transistors; varactors; CMOS reconfigurable low-noise amplifier; broadband input stage; frequency 2.4 GHz to 5.4 GHz; gain 12 dB; gain 25 dB; linearity adjustment; multitapped switching inductor; noise figure 2.2 dB to 3.1 dB; power consumption; power supply; reconfigurable band-selective stage; size-switchable transistor; stepped gain adjustment; varactors; voltage 1 V; wide-range frequency tuning; Dual reactive feedback; low-noise amplifier (LNA); multistandard; reconfigurable; switching inductor;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
DOI :
10.1109/TMTT.2008.2006804
