An Energy Recycling Envelope Tracking Supply Modulator Assisted by Small Cap Replica With 89.7&#x0025; Efficiency and 37&#x0025; Reduced Linear Amplifier Current for 150 MHz Bandwidth 5G New Radio RF Applications

Chong Sin Huang; Tzu Yu Tzeng; Wei Cheng Huang; Yi Hsiang Kao; Jie Lin Wu; Ke Horng Chen; Ying Hsi Lin; Shian Ru Lin; Tsung Yen Tsai

doi:10.1109/JSSC.2022.3172862

An Energy Recycling Envelope Tracking Supply Modulator Assisted by Small Cap Replica With 89.7% Efficiency and 37% Reduced Linear Amplifier Current for 150 MHz Bandwidth 5G New Radio RF Applications

Chong Sin Huang, Tzu Yu Tzeng, Wei Cheng Huang, Yi Hsiang Kao, Jie Lin Wu, Ke Horng Chen, Ying Hsi Lin, Shian Ru Lin, Tsung Yen Tsai

Department of Electrical and Computer Engineering

Research output: Contribution to journal › Article › peer-review

2 Scopus citations

Abstract

This article proposes an envelope tracking supply modulator (ETSM) that recycles the originally wasted energy in the linear amplifier (LA) to generate negative voltage <formula> <tex>${V_{{NEG}}}$</tex> </formula> and achieve fast down tracking. With the insertion of <formula> <tex>${V_{{NEG}}}$</tex> </formula> , the negative slope of <formula> <tex>${I_{{BUCK}}}$</tex> </formula> becomes 25% larger. <formula> <tex>${V_{{NEG}}}$</tex> </formula> is also used to boost the input voltage of buck converter from 2 <formula> <tex>${V_{{BAT}}}$</tex> </formula> to 2.6 <formula> <tex>${V_{{BAT}}}$</tex> </formula> and raise the positive slope of <formula> <tex>${I_{{BUCK}}}$</tex> </formula> by 93%, which improves the transient response of buck converter and decreases <formula> <tex>${| I_{{LA}}|}$</tex> </formula> by 37%. With energy recycling and high-bandwidth LA replica, ETSM supports 150-MHz 5G new radio (5G NR) application and achieves 89.7% efficiency when output power is 3.7 W. In addition, the proposed differential feedforward technique controls the operation of energy recycling precisely with the calibration logic.

Original language	English
Pages (from-to)	1
Number of pages	1
Journal	IEEE Journal of Solid-State Circuits
DOIs	https://doi.org/10.1109/JSSC.2022.3172862
State	Accepted/In press - 2022

Keywords

5G mobile communication
5G new radio (5G NR)
Bandwidth
Buck converters
Capacitors
Couplings
energy recycling
envelope tracking (ET)
fast transient buck converter
high-bandwidth linear amplifier (LA).
Recycling
Voltage control

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10.1109/JSSC.2022.3172862

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Huang, C. S., Tzeng, T. Y., Huang, W. C., Kao, Y. H., Wu, J. L., Chen, K. H., Lin, Y. H., Lin, S. R., & Tsai, T. Y. (Accepted/In press). An Energy Recycling Envelope Tracking Supply Modulator Assisted by Small Cap Replica With 89.7% Efficiency and 37% Reduced Linear Amplifier Current for 150 MHz Bandwidth 5G New Radio RF Applications. IEEE Journal of Solid-State Circuits, 1. https://doi.org/10.1109/JSSC.2022.3172862

@article{a4240a54b8464c45be3e9e4077d3cede,

title = "An Energy Recycling Envelope Tracking Supply Modulator Assisted by Small Cap Replica With 89.7% Efficiency and 37% Reduced Linear Amplifier Current for 150 MHz Bandwidth 5G New Radio RF Applications",

abstract = "This article proposes an envelope tracking supply modulator (ETSM) that recycles the originally wasted energy in the linear amplifier (LA) to generate negative voltage ${V_{{NEG}}}$ and achieve fast down tracking. With the insertion of ${V_{{NEG}}}$ , the negative slope of ${I_{{BUCK}}}$ becomes 25% larger. ${V_{{NEG}}}$ is also used to boost the input voltage of buck converter from 2 ${V_{{BAT}}}$ to 2.6 ${V_{{BAT}}}$ and raise the positive slope of ${I_{{BUCK}}}$ by 93%, which improves the transient response of buck converter and decreases ${| I_{{LA}}|}$ by 37%. With energy recycling and high-bandwidth LA replica, ETSM supports 150-MHz 5G new radio (5G NR) application and achieves 89.7% efficiency when output power is 3.7 W. In addition, the proposed differential feedforward technique controls the operation of energy recycling precisely with the calibration logic.",

keywords = "5G mobile communication, 5G new radio (5G NR), Bandwidth, Buck converters, Capacitors, Couplings, energy recycling, envelope tracking (ET), fast transient buck converter, high-bandwidth linear amplifier (LA)., Recycling, Voltage control",

author = "Huang, {Chong Sin} and Tzeng, {Tzu Yu} and Huang, {Wei Cheng} and Kao, {Yi Hsiang} and Wu, {Jie Lin} and Chen, {Ke Horng} and Lin, {Ying Hsi} and Lin, {Shian Ru} and Tsai, {Tsung Yen}",

note = "Publisher Copyright: IEEE",

year = "2022",

doi = "10.1109/JSSC.2022.3172862",

language = "English",

pages = "1",

journal = "IEEE Journal of Solid-State Circuits",

issn = "0018-9200",

publisher = "Institute of Electrical and Electronics Engineers Inc.",

}

Huang, CS, Tzeng, TY, Huang, WC, Kao, YH, Wu, JL, Chen, KH, Lin, YH, Lin, SR & Tsai, TY 2022, 'An Energy Recycling Envelope Tracking Supply Modulator Assisted by Small Cap Replica With 89.7% Efficiency and 37% Reduced Linear Amplifier Current for 150 MHz Bandwidth 5G New Radio RF Applications', IEEE Journal of Solid-State Circuits, pp. 1. https://doi.org/10.1109/JSSC.2022.3172862

An Energy Recycling Envelope Tracking Supply Modulator Assisted by Small Cap Replica With 89.7% Efficiency and 37% Reduced Linear Amplifier Current for 150 MHz Bandwidth 5G New Radio RF Applications. / Huang, Chong Sin; Tzeng, Tzu Yu; Huang, Wei Cheng et al.
In: IEEE Journal of Solid-State Circuits, 2022, p. 1.

Research output: Contribution to journal › Article › peer-review

TY - JOUR

T1 - An Energy Recycling Envelope Tracking Supply Modulator Assisted by Small Cap Replica With 89.7% Efficiency and 37% Reduced Linear Amplifier Current for 150 MHz Bandwidth 5G New Radio RF Applications

AU - Huang, Chong Sin

AU - Tzeng, Tzu Yu

AU - Huang, Wei Cheng

AU - Kao, Yi Hsiang

AU - Wu, Jie Lin

AU - Chen, Ke Horng

AU - Lin, Ying Hsi

AU - Lin, Shian Ru

AU - Tsai, Tsung Yen

N1 - Publisher Copyright: IEEE

PY - 2022

Y1 - 2022

N2 - This article proposes an envelope tracking supply modulator (ETSM) that recycles the originally wasted energy in the linear amplifier (LA) to generate negative voltage ${V_{{NEG}}}$ and achieve fast down tracking. With the insertion of ${V_{{NEG}}}$ , the negative slope of ${I_{{BUCK}}}$ becomes 25% larger. ${V_{{NEG}}}$ is also used to boost the input voltage of buck converter from 2 ${V_{{BAT}}}$ to 2.6 ${V_{{BAT}}}$ and raise the positive slope of ${I_{{BUCK}}}$ by 93%, which improves the transient response of buck converter and decreases ${| I_{{LA}}|}$ by 37%. With energy recycling and high-bandwidth LA replica, ETSM supports 150-MHz 5G new radio (5G NR) application and achieves 89.7% efficiency when output power is 3.7 W. In addition, the proposed differential feedforward technique controls the operation of energy recycling precisely with the calibration logic.

AB - This article proposes an envelope tracking supply modulator (ETSM) that recycles the originally wasted energy in the linear amplifier (LA) to generate negative voltage ${V_{{NEG}}}$ and achieve fast down tracking. With the insertion of ${V_{{NEG}}}$ , the negative slope of ${I_{{BUCK}}}$ becomes 25% larger. ${V_{{NEG}}}$ is also used to boost the input voltage of buck converter from 2 ${V_{{BAT}}}$ to 2.6 ${V_{{BAT}}}$ and raise the positive slope of ${I_{{BUCK}}}$ by 93%, which improves the transient response of buck converter and decreases ${| I_{{LA}}|}$ by 37%. With energy recycling and high-bandwidth LA replica, ETSM supports 150-MHz 5G new radio (5G NR) application and achieves 89.7% efficiency when output power is 3.7 W. In addition, the proposed differential feedforward technique controls the operation of energy recycling precisely with the calibration logic.

KW - 5G mobile communication

KW - 5G new radio (5G NR)

KW - Bandwidth

KW - Buck converters

KW - Capacitors

KW - Couplings

KW - energy recycling

KW - envelope tracking (ET)

KW - fast transient buck converter

KW - high-bandwidth linear amplifier (LA).

KW - Recycling

KW - Voltage control

UR - http://www.scopus.com/inward/record.url?scp=85130501772&partnerID=8YFLogxK

U2 - 10.1109/JSSC.2022.3172862

DO - 10.1109/JSSC.2022.3172862

M3 - Article

AN - SCOPUS:85130501772

SN - 0018-9200

SP - 1

JO - IEEE Journal of Solid-State Circuits

JF - IEEE Journal of Solid-State Circuits

ER -