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

  • Falk Haßler (a1), Frank Ellinger (a1), Udo Jörges (a1), Robert Wolf (a1) and Bastian Lindner (a1)...

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.

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Corresponding author

Corresponding author: Falk Haßler Email: falk.hassler@mailbox.tu-dresden.de

References

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[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, 12631266.
[2]Birafane, A.; El-Asmar, M.; Kouki, A. B.; Helaoui, M.; and Ghannouchi, F. M.: Analyzing linc systems. IEEE, Microw. Mag., 11 (2010), 5971.
[3]Vasić, M. et al. : High efficiency power ampfilifer for high frequency radio transmitters, in Applied Power Electronics Conf. and Exposition (APEC), IEEE, 2010, 729736.
[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), 268279.
[5]Staudinger, J. et al. : 800 MHz power amplifier using envelope following technique, in IEEE, Radio and Wireless Conf., 1999, pp. 301304.
[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), 112120.
[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), 112120.
[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, 14.
[9]Springer, A.; and Wigel, R.: UMTS-The Physical Layer of the Universal Mobile Telecommunications System, Springer-Verlag, Berlin 2002.
[10]User Equipment (UE) radio transmission and reception (FDD) V6.19.0, Technical Specification Group 3GPP, 2009.
[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, 174177.
[12]Sundstrom, L.: Fast and accurate aclr estimation method, in IEEE, Radio and Wireless Conf., 2004, 183186.

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

  • Falk Haßler (a1), Frank Ellinger (a1), Udo Jörges (a1), Robert Wolf (a1) and Bastian Lindner (a1)...

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