High Efficiency Envelope Amplifier Using The Slow-Envelope Technique

Cheng, Pengming and García Suárez, Oscar and Alou Cervera, Pedro and Oliver Ramírez, Jesús Angel and Montoro, G. and Cobos Márquez, José Antonio (2012). High Efficiency Envelope Amplifier Using The Slow-Envelope Technique. In: "Actas del XXVII Simposium Nacional de la Unión Científica Internacional de Radio (URSI)", 12/09/2012 - 14/09/2012, Alicante (España). pp. 1-5.

Description

Title: High Efficiency Envelope Amplifier Using The Slow-Envelope Technique
Author/s:
  • Cheng, Pengming
  • García Suárez, Oscar
  • Alou Cervera, Pedro
  • Oliver Ramírez, Jesús Angel
  • Montoro, G.
  • Cobos Márquez, José Antonio
Item Type: Presentation at Congress or Conference (Article)
Event Title: Actas del XXVII Simposium Nacional de la Unión Científica Internacional de Radio (URSI)
Event Dates: 12/09/2012 - 14/09/2012
Event Location: Alicante (España)
Title of Book: XXVII Simposium Nacional de la Unión Científica Internacional de Radio (URSI)
Date: 2012
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 efficiency envelope amplifiers are demanded in EER technique for RF transmitters, which benefits low maintaining cost or long battery time. The conventional solution is a dc-dc switching converters. This 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 alternative 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 (also called slow-envelope 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.

More information

Item ID: 20882
DC Identifier: http://oa.upm.es/20882/
OAI Identifier: oai:oa.upm.es:20882
Official URL: http://www.uwicore.umh.es/ursi2012/
Deposited by: Memoria Investigacion
Deposited on: 12 Nov 2013 17:29
Last Modified: 22 Sep 2014 11:21
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