NDLI: A Multiple-Input Digitally Controlled Buck Converter for Envelope Tracking Applications in Radiofrequency Power Amplifiers

Content Provider	IEEE Xplore Digital Library
Author	Rodriguez, M. Fernandez-Miaja, P. Rodriguez, A. Sebastian, J.
Copyright Year	1986
Abstract	Wireless communication transmitters have very low efficiencies due to the use of linear radiofrequency power amplifiers. Several techniques have been proposed over the years to improve the efficiency of these systems. One of the most promising is called the envelope tracking technique, which is based on using a fast switching mode power supply to provide a varying voltage to the power amplifier that tracks the envelope of the transmitted signal. The amplifier can, thus, operate continuously near its theoretical maximum efficiency, greatly improving the overall efficiency of the communication system. This paper proposes a multilevel digitally controlled power supply suitable for this application. It is shown to perform very well, achieving very high efficiency, high-output power capability and tracking bandwidths above 50 kHz. This paper also shows that the proposed system is able to produce a 15% overall increase in efficiency in a complete envelope tracking system.
Sponsorship	IEEE Power Electronics Society
Starting Page	369
Ending Page	381
Page Count	13
File Size	3865674
File Format	PDF
ISSN	08858993
Volume Number	25
Issue Number	2
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-02-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Digital control Radio control Buck converters Radio frequency Power amplifiers Radiofrequency amplifiers Communication system control Power supplies Wireless communication Radio transmitters switched mode power supplies DC–DC power conversion energy management HF amplifiers
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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