Efficiency Analysis and Design Considerations of a Hysteretic Current Controlled Parallel Hybrid Envelope Tracking Power Supply

Authors

  • Ambily Babu ECE Department-VTU, AMC Engineering College, India
  • B. G. Shivaleelavathi ECE Department- VTU, JSS Academy of Technical Education, India
  • Veeramma Yatnalli ECE Department- VTU, JSS Academy of Technical Education, India
Volume: 13 | Issue: 1 | Pages: 9812-9818 | February 2023 | https://doi.org/10.48084/etasr.5414

Abstract

This paper presents the realization of an Envelope Tracking Power Supply (ETPS), for a sinusoidal envelope input signal. A parallel hybrid topology is chosen for the implementation. In this topology, a voltage-controlled Class-AB linear amplifier stage and a current-controlled switching converter stage operate in parallel. A hysteretic current control scheme is employed to control the operation of the switching converter. Block-level implementation of the ETPS is done using Simulink 2017b, continuous mode simulation. Simulations are performed using a sinewave input envelope signal = 1.94+ 1.2 sin(ω∙t). The input frequency varied from 1MHz to 60MHz. As the input frequency is increased, the ETPS moves from the linear to the non-linear region of operation. During the transition, the slew rates of the load current and the switching current match at a particular input frequency of 2MHz while the efficiency peaks. The maximum obtained efficiency while tracking the sinewave input signal is 82.3%. The way the efficiency can be optimized by focusing on the matching of the slew rates of load and switching currents is explained. Also, an insight into the study of various circuit parameters and the trade-offs that the designer needs to consider while designing an ETPS, is provided.

Keywords:

ETPA, ETPS, envelope tracking, RF power amplifiers, supply modulators, mobile communication, design considerations

Downloads

Download data is not yet available.

References

Z. Wang, "Demystifying Envelope Tracking: Use for High-Efficiency Power Amplifiers for 4G and Beyond," IEEE Microwave Magazine, vol. 16, no. 3, pp. 106–129, Apr. 2015. DOI: https://doi.org/10.1109/MMM.2014.2385351

B. Kim et al., "Push the Envelope: Design Concepts for Envelope-Tracking Power Amplifiers," IEEE Microwave Magazine, vol. 14, no. 3, pp. 68–81, Feb. 2013. DOI: https://doi.org/10.1109/MMM.2013.2240851

A. K. Kwan, M. Younes, R. Darraji, and F. M. Ghannouchi, "On Track for Efficiency: Concurrent Multiband Envelope-Tracking Power Amplifiers," IEEE Microwave Magazine, vol. 17, no. 5, pp. 46–59, Feb. 2016. DOI: https://doi.org/10.1109/MMM.2016.2525118

P. Asbeck and Z. Popovic, "ET Comes of Age: Envelope Tracking for Higher-Efficiency Power Amplifiers," IEEE Microwave Magazine, vol. 17, no. 3, pp. 16–25, Mar. 2016. DOI: https://doi.org/10.1109/MMM.2015.2505699

A. Babu, B. G. Shivaleelavathi, and V. Yatnalli, "Enhanced Power Added Efficiency for RF Power Amplifiers in Mobile Communication," International Journal of Grid and Distributed Computing, vol. 13, no. 2, pp. 1543–1553, Dec. 2020.

H. He, T. Ge, and J. Chang, "A review on supply modulators for Envelope-Tracking Power Amplifiers," in 2016 International Symposium on Integrated Circuits (ISIC), Sep. 2016, pp. 1–4. DOI: https://doi.org/10.1109/ISICIR.2016.7829694

X. Ruan, Y. Wang, and Q. Jin, "A review of envelope tracking power supply for mobile communication systems," CPSS Transactions on Power Electronics and Applications, vol. 2, no. 4, pp. 277–291, Dec. 2017. DOI: https://doi.org/10.24295/CPSSTPEA.2017.00026

M. Vasić, O. Garcia, J. A. Oliver, P. Alou, and J. A. Cobos, "Survey of architectures and optimizations for wide bandwidth envelope amplifier," in 2012 15th International Power Electronics and Motion Control Conference (EPE/PEMC), Novi Sad, Serbia, Sep. 2012, pp. LS8d.1-1-LS8d.1-7. DOI: https://doi.org/10.1109/EPEPEMC.2012.6397529

A. Babu, B. G. Shivaleelavathi, and V. Yatnalli, "A Comprehensive Review on Supply Modulators and Control Strategies for Envelope Tracking RF Power Amplifiers in Mobile Communication," IETE Journal of Research, Oct. 2021. DOI: https://doi.org/10.1080/03772063.2021.1987998

M. Azhar and A. Shabbir, "5G Networks: Challenges and Techniques for Energy Efficiency," Engineering, Technology & Applied Science Research, vol. 8, no. 2, pp. 2864–2868, Apr. 2018. DOI: https://doi.org/10.48084/etasr.1623

I. Androulidakis and G. Kandus, "Mobile Phone Brand Categorization vs. Users’ Security Practices," Engineering, Technology & Applied Science Research, vol. 1, no. 2, pp. 30–35, Apr. 2011. DOI: https://doi.org/10.48084/etasr.19

H. Meng, "Analysis and design consideration of hybrid supply modulator for envelope tracking power amplifier," in 2014 9th IEEE Conference on Industrial Electronics and Applications, Hangzhou, China, Jun. 2014, pp. 151–154. DOI: https://doi.org/10.1109/ICIEA.2014.6931149

F. Wang et al., "An Improved Power-Added Efficiency 19-dBm Hybrid Envelope Elimination and Restoration Power Amplifier for 802.11g WLAN Applications," IEEE Transactions on Microwave Theory and Techniques, vol. 54, no. 12, pp. 4086–4099, Sep. 2006. DOI: https://doi.org/10.1109/TMTT.2006.885575

J. Choi, D. Kim, D. Kang, and B. Kim, "A Polar Transmitter With CMOS Programmable Hysteretic-Controlled Hybrid Switching Supply Modulator for Multistandard Applications," IEEE Transactions on Microwave Theory and Techniques, vol. 57, no. 7, pp. 1675–1686, Jul. 2009. DOI: https://doi.org/10.1109/TMTT.2009.2021880

J. Ham et al., "CMOS Power Amplifier Integrated Circuit With Dual-Mode Supply Modulator for Mobile Terminals," IEEE Transactions on Circuits and Systems I: Regular Papers, vol. 63, no. 1, pp. 157–167, Jan. 2016. DOI: https://doi.org/10.1109/TCSI.2015.2512703

J.-S. Paek et al., "A − 137 dBm/Hz Noise, 82% Efficiency AC-Coupled Hybrid Supply Modulator With Integrated Buck-Boost Converter," IEEE Journal of Solid-State Circuits, vol. 51, no. 11, pp. 2757–2768, Aug. 2016. DOI: https://doi.org/10.1109/JSSC.2016.2604296

Y. Jing and B. Bakkaloglu, "A High Slew-Rate Adaptive Biasing Hybrid Envelope Tracking Supply Modulator for LTE Applications," IEEE Transactions on Microwave Theory and Techniques, vol. 65, no. 9, pp. 3245–3256, Sep. 2017. DOI: https://doi.org/10.1109/TMTT.2017.2678476

Y. Wang, X. Ruan, Y. Leng, and Y. Li, "Hysteresis Current Control for Multilevel Converter in Parallel-Form Switch-Linear Hybrid Envelope Tracking Power Supply," IEEE Transactions on Power Electronics, vol. 34, no. 2, pp. 1950–1959, Oct. 2019. DOI: https://doi.org/10.1109/TPEL.2018.2835640

D. Kimball, T. Nakatani, J. Yan, P. T. Theilmann, and I. Telleiz, "High efficiency envelope tracking power amplifiers for wide modulation bandwidth signals (invited)," in 2014 Asia-Pacific Microwave Conference, Sendai, Japan, Aug. 2014, pp. 103–106.

J. Kim et al., "Wideband envelope amplifier for envelope-tracking operation of handset power amplifier," in 2014 44th European Microwave Conference, Rome, Italy, Jul. 2014, pp. 1352–1355. DOI: https://doi.org/10.1109/EuMIC.2014.6997879

J. Kim, D. Kim, Y. Cho, D. Kang, and B. Kim, "Envelope-tracking power amplifier with enhanced back-off efficiency using average switch current control of supply modulator," in 2013 Asia-Pacific Microwave Conference Proceedings (APMC), Seoul, Korea, Aug. 2013, pp. 435–437. DOI: https://doi.org/10.1109/APMC.2013.6694822

H. He, Y. Kang, T. Ge, L. Guo, and J. S. Chang, "A 2.5-W 40-MHz-Bandwidth Hybrid Supply Modulator With 91% Peak Efficiency, 3-V Output Swing, and 4-mV Output Ripple at 3.6-V Supply," IEEE Transactions on Power Electronics, vol. 34, no. 1, pp. 712–723, Jan. 2019. DOI: https://doi.org/10.1109/TPEL.2018.2827396

J.-S. Paek, D. Kim, Y. Choo, Y.-S. Youn, J. Lee, and T. B.-H. Cho, "Design of Boosted Supply Modulator With Reverse Current Protection for Wide Battery Range in Envelope Tracking Operation," IEEE Transactions on Microwave Theory and Techniques, vol. 67, no. 1, pp. 183–194, Jan. 2019. DOI: https://doi.org/10.1109/TMTT.2018.2879323

A. Shabbir, H. R. Khan, S. A. Ali, and S. Rizvi, "Design and Performance Analysis of Multi-tier Heterogeneous Network through Coverage, Throughput and Energy Efficiency," Engineering, Technology & Applied Science Research, vol. 7, no. 6, pp. 2345–2350, Dec. 2017. DOI: https://doi.org/10.48084/etasr.1256

Downloads

How to Cite

[1]
A. Babu, B. G. Shivaleelavathi, and V. Yatnalli, “Efficiency Analysis and Design Considerations of a Hysteretic Current Controlled Parallel Hybrid Envelope Tracking Power Supply”, Eng. Technol. Appl. Sci. Res., vol. 13, no. 1, pp. 9812–9818, Feb. 2023.

Metrics

Abstract Views: 780
PDF Downloads: 485

Metrics Information

Most read articles by the same author(s)