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Dynamic biasing techniques for RF power amplifier linearity and efficiency improvement

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5 Author(s)
Deltimple, N. ; IMS Lab., Univ. of Bordeaux, Talence, France ; Leyssenne, L. ; Kerherve, E. ; Deval, Y.
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Nowadays, mobile handsets have to deal with several challenges. First of all, a good efficiency is essential in order to save power and battery life-time. Then, to cater to multi-standards operation which provide very high data rates, strong linearity performances are mandatory, to the expense of transmit front-end efficiency. As RF Power Amplifiers (PAs) are the most power consuming components, this paper describes an approach of managing the efficiency-linearity trade-off by using dynamic biasing. The dynamic biasing allows a power control of the PA and is brought into play both with an open-loop solution and a closed-loop solution. The main purpose of the paper is to present a description of the circuits developed and their performances in terms of output power, linearity and efficiency. The reconfigurable PAs are dedicated to UMTS-WCDMA and WiFi/WiMAX standards.

Published in:

IC Design and Technology (ICICDT), 2010 IEEE International Conference on

Date of Conference:

2-4 June 2010