Optimal Design of Envelope Amplifier Based on Linear Assisted Buck Converter

Vasic, Miroslav and Díaz López, Daniel and García Suárez, Oscar and Alou Cervera, Pedro and Oliver Ramírez, Jesús Angel and Cobos Márquez, José Antonio (2012). Optimal Design of Envelope Amplifier Based on Linear Assisted Buck Converter. In: "Twenty-Seventh Annual IEEE Applied Power Electronics Conference and Exposition (APEC), 2012", 05/02/2012 - 09/02/2012, Orlando (Florida, USA). pp. 836-843.

Description

Title: Optimal Design of Envelope Amplifier Based on Linear Assisted Buck Converter
Author/s:
  • Vasic, Miroslav
  • Díaz López, Daniel
  • García Suárez, Oscar
  • Alou Cervera, Pedro
  • Oliver Ramírez, Jesús Angel
  • Cobos Márquez, José Antonio
Item Type: Presentation at Congress or Conference (Article)
Event Title: Twenty-Seventh Annual IEEE Applied Power Electronics Conference and Exposition (APEC), 2012
Event Dates: 05/02/2012 - 09/02/2012
Event Location: Orlando (Florida, USA)
Title of Book: Proceedings of IEEE Applied Power Electronics Conference and Exposition (APEC) 2012
Date: February 2012
Subjects:
Freetext Keywords: GaN envelope amplifier envelope elimination envelope restoration envelope tracking linear RF power amplifier linear regulator linear-assisted buck converter optimal design switching DC-DC converter
Faculty: E.T.S.I. Industriales (UPM)
Department: Automática, Ingeniería Eléctrica y Electrónica e Informática Industrial
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

Envelope Tracking (ET) and Envelope Elimination and Restoration (EER) are two techniques that have been used as a solution for highly efficient linear RF Power Amplifiers (PA). In both techniques the most important part is a dc-dc converter called envelope amplifier that has to supply the RF PA with variable voltage. Besides high efficiency, its bandwidth is very important as well. Envelope amplifier based on parallel combination of a switching dc-dc converter and a linear regulator is an architecture that is widely used due to its simplicity. In this paper we discuss about theoretical limitations of this architecture regarding its efficiency and we demonstrate two possible way of its implementation. In order to derive the presented conclusions, a theoretical model of envelope amplifier's efficiency has been presented. Additionally, the benefits of the new emerging GaN technology for this application have been shown as well.

More information

Item ID: 20873
DC Identifier: http://oa.upm.es/20873/
OAI Identifier: oai:oa.upm.es:20873
Official URL: http://ieeexplore.ieee.org/xpl/mostRecentIssue.jsp?reload=true&punumber=6158725
Deposited by: Memoria Investigacion
Deposited on: 02 Jun 2015 17:53
Last Modified: 02 Jun 2015 17:53
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