Technical Program

Paper Detail

Paper:COMM-P5.1
Session:Computation Kernels and IP for Communication Systems II
Time:Tuesday, May 25, 14:15 - 15:45
Presentation: Poster
Topic: Circuits and Systems for Communications: RF & High-Frequency Circuits for Communications
Title: A CLASS A/B LOW POWER AMPLIFIER FOR WIRELESS SENSOR NETWORKS
Authors: Yuen-Hui Chee; University of California, Berkeley 
 Jan Rabaey; University of California, Berkeley 
 Ali M. Niknejad; University of California, Berkeley 
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 its switching counterparts, now become a viable candidate. This paper presents a class A/B low power amplifier suitable for ad-hoc wireless sensor network. The amplifier is implemented in 0.13um CMOS process and operates with nominal 1.2V supply. Capacitive transformer is used to match the antenna to power amplifier for maximum efficiency. The amplifier achieves 35% drain efficiency while delivering 2.6mW at 1.92 GHz. With 1.5V supply, the power amplifier delivers 4.8mW with 38% drain efficiency.
 
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