Envelope Amplifier Based on a Hybrid Series Converter With The Slow-envelope Technique

Cheng, Pengming and García Suárez, Oscar and Vasic, Miroslav and Alou Cervera, Pedro and Oliver Ramírez, Jesús Angel and Montoro, G. and Cobos Márquez, José Antonio (2012). Envelope Amplifier Based on a Hybrid Series Converter With The Slow-envelope Technique. In: "Proceedings of 2012 IEEE Conference on Energy Conversion Congress and Exposition (ECCE)", 15/09/2012 - 20/09/2012, Raleigh (North Carolina). ISBN 978-1-4673-0802-1. pp. 1-5.

Description

Title: Envelope Amplifier Based on a Hybrid Series Converter With The Slow-envelope Technique
Author/s:
  • Cheng, Pengming
  • García Suárez, Oscar
  • Vasic, Miroslav
  • Alou Cervera, Pedro
  • Oliver Ramírez, Jesús Angel
  • Montoro, G.
  • Cobos Márquez, José Antonio
Item Type: Presentation at Congress or Conference (Article)
Event Title: Proceedings of 2012 IEEE Conference on Energy Conversion Congress and Exposition (ECCE)
Event Dates: 15/09/2012 - 20/09/2012
Event Location: Raleigh (North Carolina)
Title of Book: Energy Conversion Congress and Exposition (ECCE), 2012 IEEE
Date: 2012
ISBN: 978-1-4673-0802-1
Subjects:
Faculty: Centro de Electrónica Industrial (CEI) (UPM)
Department: Otro
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

High frequency dc-dc switching converters are used as envelope amplifiers in RF transmitters. The dc-dc converter should operate at very high frequency to track an envelope in the MHz range to supply the power amplifier. One of the circuits suitable for this application is a hybrid topology composed of a switched converter and a linear regulator in series that work together to adjust the output voltage to track the envelope with accuracy. This topology can take advantage of the reduced slew-rate technique where switching dc-dc converter provides the RF envelope with limited slew rate in order to avoid high switching frequency and high power losses, while the linear regulator performs fine adjustment in order to obtain the exact replica of the RF envelope. The combination of this control technique with this topology is proposed in this paper. Envelopes with different bandwidth will be considered to optimize the efficiency of the dc-dc converter. The calculations and experiments have been done to track a 2MHz envelope in the range 0-12V for an EER RF transmitter.

More information

Item ID: 20886
DC Identifier: http://oa.upm.es/20886/
OAI Identifier: oai:oa.upm.es:20886
Official URL: http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=6342420
Deposited by: Memoria Investigacion
Deposited on: 12 Nov 2013 15:00
Last Modified: 22 Sep 2014 11:21
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