Title :
A class A/B low power amplifier for wireless sensor networks
Author :
Chee, Y.H. ; Rabaey, J. ; Niknejad, A.M.
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., California Univ., Berkeley, CA, USA
Abstract :
In a dense ad-hoc wireless sensor network, the transmit power is comparable to the circuit power. Linear power amplifiers, which require lower drive power as compared to their switching counterparts, now become viable candidates. This paper presents a class A/B low power amplifier suitable for an ad-hoc wireless sensor network. The amplifier is implemented in a 0.13 μm CMOS process and operates with a nominal 1.2 V supply. A capacitive transformer is used to match the antenna to the power amplifier for maximum efficiency. The amplifier achieves 35% drain efficiency while delivering 2.6 mW at 1.92 GHz. With 1.5 V supply, the power amplifier delivers 4.8 mW with 38% drain efficiency.
Keywords :
CMOS integrated circuits; ad hoc networks; integrated circuit design; low-power electronics; power amplifiers; wireless sensor networks; 0.13 micron; 1.2 V; 1.5 V; 1.92 GHz; 2.6 mW; 4.8 mW; CMOS process; ad hoc wireless sensor network; capacitive transformer; circuit power; linear power amplifier; low power amplifier; Circuits; Costs; Intelligent sensors; Power amplifiers; Power control; Power generation; Transceivers; Transmitters; Voltage; Wireless sensor networks;
Conference_Titel :
Circuits and Systems, 2004. ISCAS '04. Proceedings of the 2004 International Symposium on
Print_ISBN :
0-7803-8251-X
DOI :
10.1109/ISCAS.2004.1329027
