Global stability analysis and stabilization of power amplifiers

Published on Nov 7, 2008
· DOI :10.1109/MRRS.2008.4669592
Almudena Suárez Rodríguez (UC: University of Cantabria), Sanggeun Jeon14
Estimated H-index: 14
(California Institute of Technology),
David B. Rutledge33
Estimated H-index: 33
(California Institute of Technology)
Power amplifiers often exhibit undesired behavior from certain input power value which cannot be predicted with a small-signal stability analysis. Among the commonly observed undesired phenomena are spurious oscillations, frequency divisions, hysteresis or chaos. In this contribution, simulation tools are presented, enabling an in-depth study of the origin and characteristics of these phenomena. The developed global stability analysis and stabilization tools have enabled an efficient suppression of the undesired behavior in a switching-mode power amplifier, with minimum degradation of the amplifier performance, in terms of drain efficiency and output power.
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