2007 · 13 citations · 6 references
EngineeringCommunicationElectrical EngineeringCircuit TheoryPower ElectronicsWireless CommunicationsConverter TopologiesEnergy EfficiencyHigh-frequency Power ConversionPower AmplifiersWireless NetworksWireless Power TransferBuck Ac-dc ConvertersBuck ConvertersEfficiencyEfficiency Optimization In Power ConvertersEnvelope TrackingEnvelope Tracking AmplifiersPower Amplifier DesignRadio Frequency Power Amplifiers
An analysis procedure is presented allowing the systematic optimisation of buck-converters, which are required for the efficiency enhancement of power amplifiers in back off mode. All relevant parasitics are included. Based on this model the performance of the envelope following and tracking approaches are investigated for common communication standards such as GSM, UMTS and WLAN. Efficiency enhancements of above 100% are shown.
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800 MHz power amplifier using envelope following technique
Joseph Staudinger, B. Gilsdorf, David Newman et al. · 2003 · 32 citations