Hostname: page-component-586b7cd67f-l7hp2 Total loading time: 0 Render date: 2024-11-22T15:09:06.702Z Has data issue: false hasContentIssue false
  • English
  • Français

A high-speed buck converter for efficiency enhancement of W-CDMA power amplifiers

Published online by Cambridge University Press:  22 October 2012

Falk Haßler ,
Frank Ellinger ,
Udo Jörges ,
Robert Wolf  and
Bastian Lindner
Falk Haßler*
Affiliation:
Faculty of Electrical and Computer Engineering, Dresden University of Technology, 01062 Dresden, Germany
Frank Ellinger
Affiliation:
Faculty of Electrical and Computer Engineering, Dresden University of Technology, 01062 Dresden, Germany
Udo Jörges
Affiliation:
Faculty of Electrical and Computer Engineering, Dresden University of Technology, 01062 Dresden, Germany
Robert Wolf
Affiliation:
Faculty of Electrical and Computer Engineering, Dresden University of Technology, 01062 Dresden, Germany
Bastian Lindner
Affiliation:
Faculty of Electrical and Computer Engineering, Dresden University of Technology, 01062 Dresden, Germany
*
Corresponding author: Falk Haßler Email: [email protected]
Get access Rights & Permissions [Opens in a new window]

Abstract

We present a design strategy for a buck converter, which fulfills the high dynamic requirements of efficient envelope amplifier needed by modern efficiency enhancement techniques for power amplifiers. The proposed DC–DC converter has an innovative control system, which makes it fast, robust, and resource saving. A mathematical model describes its dynamic behavior and is used to find a setup, which gives an optimal compromise between the dynamic performance and efficiency. The approach is applicable to various state-of-the-art communication standards. As an example, an envelope following (EF) power amplifier (PA) for the wideband code-division-multiple-access (W-CDMA) modulation scheme is treated. The corresponding buck converter is implemented in a monolithic chip (except the inductor and the capacitor of the output filter). The measurements with an industry standard W-CDMA PA (RMPA2265) match very well with the forecast of the model and confirm doubling of the average efficiency.

Keywords

Circuit design and applicationsPower amplifiers and linearizers
Type
Research Papers
Information
International Journal of Microwave and Wireless Technologies , Volume 4 , Issue 5 , October 2012 , pp. 505 - 514
Copyright
Copyright © Cambridge University Press and the European Microwave Association 2012

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

[1]Yamamoto, T.; Kitahara, T.; and Hiura, S.: 50% drain efficiency doherty amplifier with optimized power range for w-cdma signal, in MTT-S Int. Microw. Symp. Dig. IEEE, 2007, 1263–1266.Google Scholar
[2]Birafane, A.; El-Asmar, M.; Kouki, A. B.; Helaoui, M.; and Ghannouchi, F. M.: Analyzing linc systems. IEEE, Microw. Mag., 11 (2010), 59–71.CrossRefGoogle Scholar
[3]Vasić, M. et al. : High efficiency power ampfilifer for high frequency radio transmitters, in Applied Power Electronics Conf. and Exposition (APEC), IEEE, 2010, 729–736.Google Scholar
[4]Brain, J. M.; Paul, A. M.; Paul, N. W.; Peter, G. B.; and Mark, P. v. d. H.: System-efficiency analysis of power amplifier supply-tracking regimes in mobile transmitters, IEEE Trans., Circuits Syst. I: Regul. Papers, 59 (2009), 268–279.Google Scholar
[5]Staudinger, J. et al. : 800 MHz power amplifier using envelope following technique, in IEEE, Radio and Wireless Conf., 1999, pp. 301–304.Google Scholar
[6]Sahu, B.; and Rinćon-Mora, G.: A high–efficiency linear rf power amplifier with a power-tracking dynamically adaptive buck-boost supply, IEEE Trans. Microw. Theory Tech., 52 (2004), 112–120.Google Scholar
[7]Mihajlovic, Z.; Lehman, B.; and Sun, C.: Output ripple analysis of switching dc-dc converters, IEEE Trans., Circuits Syst. I: Regul. Papers 51 (2004), 112–120.Google Scholar
[8]Pinon, V.; Allard, B.; and Garnier, C.: High-frequency monolithic dc/dc converter for system-on-chip power management, in IEEE, Power Semiconductor Devices and IC's Int. Symp., 2006, 1–4.Google Scholar
[9]Springer, A.; and Wigel, R.: UMTS-The Physical Layer of the Universal Mobile Telecommunications System, Springer-Verlag, Berlin 2002.Google Scholar
[10]User Equipment (UE) radio transmission and reception (FDD) V6.19.0, Technical Specification Group 3GPP, 2009.Google Scholar
[11]Chen, L.; Shi, B.; and Lu, C.: A robust high-speed and low-power cmos current comparator circuit, in IEEE Asia-Pacific Conf. on Circuits and Systems, 2000, 174–177.Google Scholar
[12]Sundstrom, L.: Fast and accurate aclr estimation method, in IEEE, Radio and Wireless Conf., 2004, 183–186.Google Scholar