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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)
Abstract
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.
  • References (9)
  • Citations (1)
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References9
Newest
#1Sanggeun Jeon (California Institute of Technology)H-Index: 14
#2Almudena Suárez Rodríguez (California Institute of Technology)
Last. David B. Rutledge (California Institute of Technology)H-Index: 33
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Power amplifiers (PAs) often exhibit instabilities giving rise to frequency divisions or spurious oscillations. The prediction of these instabilities requires a large-signal stability analysis of the circuit. In this paper, oscillations, hysteresis, and chaotic solutions, experimentally encountered in a high-efficiency class-E/F/sub odd/ PA with four transistors combined using a distributed active transformer, are studied through the use of stability and bifurcation analysis tools. The tools hav...
46 CitationsSource
#1Scott D. Kee (California Institute of Technology)H-Index: 7
#2Ichiro AokiH-Index: 9
Last. David B. RutledgeH-Index: 33
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A new family of switching amplifiers, each member having some of the features of both class E and inverse F, is introduced. These class-E/F amplifiers have class-E features such as incorporation of the transistor parasitic capacitance into the circuit, exact truly switching time-domain solutions, and allowance for zero-voltage-switching operation. Additionally, some number of harmonics may be tuned in the fashion of inverse class F in order to achieve more desirable voltage and current waveforms...
211 CitationsSource
#1Josu JugoH-Index: 11
#2A. AnakabeH-Index: 11
Last. Juan-Mari CollantesH-Index: 15
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Different approaches for stability analysis of large-signal steady states in the harmonic domain have been developed in recent years. Particular efforts have been focused on microwave and RF circuit designs, where harmonic balance techniques are used extensively. In this work, frequency-domain control-design techniques are proposed in order to improve the stability margins of large-signal steady states. The methodology is based on circuit linearisation around the steady state under study and the...
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#1J. M. T. ThompsonH-Index: 44
Last. Rick TurnerH-Index: 1
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Preface. Preface to the First Edition. Acknowledgements from the First Edition. Introduction PART I: BASIC CONCEPTS OF NONLINEAR DYNAMICS An overview of nonlinear phenomena Point attractors in autonomous systems Limit cycles in autonomous systems Periodic attractors in driven oscillators Chaotic attractors in forced oscillators Stability and bifurcations of equilibria and cycles PART II ITERATED MAPS AS DYNAMICAL SYSTEMS Stability and bifurcation of maps Chaotic behaviour of one--and two--dimens...
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A stability analysis technique of microwave amplifiers, valid for large- or small-signal regimes, is presented. The technique calculates the system poles and zeroes from a closed-loop frequency response of the circuit linearised around its steady state. The method has been applied to an S-band monolithic amplifier, detecting spurious oscillations for certain specific bias conditions and input power levels, in good agreement with measurements.
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Jan 1, 1996 in IMS (International Microwave Symposium)
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Cited By1
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#1Ernesto LimitiH-Index: 20
Continuing the historical view sketched by a companion contribution (cfr. A. Beyer), the major advances in microwave and millimeter-wave circuit design and device characterization will be outlined, as reflected and strengthened by the many valuable papers presented in the international workshop on “Integrated Nonlinear Microwave and Millimeter-Wave Circuits” (INMMiC). The contributions in the workshops from Rome (2004) to the last edition in Dublin (2012) will be briefly recalled.
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