Title :
Micro-power amplifiers for wireless PAN applications
Author :
Perumana, Bevin George ; Chang-Ho Lee ; Laskar, J. ; Chakraborty, Shiladri
Author_Institution :
Sch. of Electr. & Comput. Eng., Georgia Inst. of Technol., Atlanta, GA, USA
Abstract :
Amplifier design techniques are presented for reducing dc power consumption in wireless PAN transceivers. A CMOS VGA cell is implemented by combining two independent gain control circuits to obtain 40dB and 50dB (dB-linear) gain ranges at 250μW and 1.75mW, respectively. A 260μW, 1GHz CMOS LNA is designed by using an unrestrained subthreshold bias technique to improve linearity. It has a measured gain of 13.6dB, a noise figure of 4.6dB and an IIP3 of 7.2dBm. An inductor-less RF VGA cell, based on a TA-TI pair, with 20dB gain range is also presented as an example of system level power optimization.
Keywords :
CMOS integrated circuits; gain control; integrated circuit design; low noise amplifiers; low-power electronics; personal area networks; transceivers; 1 GHz; 13.6 dB; 175 mW; 20 dB; 250 muW; 260 muW; 4.6 dB; 40 dB; 50 dB; CMOS LNA; CMOS VGA cell; TA-TI pair; dc power consumption; gain control circuits; improved linearity; inductor-less RF VGA cell; low noise amplifier; low power circuit design; micro-power amplifiers; power optimization; unrestrained subthreshold bias technique; variable gain amplifier; weak inversion; wireless PAN transceivers; Circuits; Energy consumption; Gain control; Gain measurement; Linearity; Noise figure; Noise measurement; Power amplifiers; Radio frequency; Transceivers;
Conference_Titel :
Microwave Symposium Digest, 2005 IEEE MTT-S International
Print_ISBN :
0-7803-8845-3
DOI :
10.1109/MWSYM.2005.1516528
