Paper Info
Title
15.1 An 88%-Efficiency Supply Modulator Achieving 1.08μs/V Fast Transition and 100MHz Envelope-Tracking Bandwidth for 5G New Radio RF Power Amplifier
Abstract
In the recent 3GPP standard, 5G New Radio (NR) in the sub-6GHz frequency band supports up to 100MHz bandwidth (BW) for uplink channel and requires fast on/off transition below $10 \mu \mathrm {s}$ to support short transition-time interval (TTI). Thus, it forces the supply modulator (SM) to track the NR-100MHz envelope signal for power saving of an RF power amplifier (RF-PA) and requires a fast dynamic voltage-scaling (DVS) transition. For the 3G/LTE uplink, the SM has to satisfy low receiver-band noise (RxBN) for LTE-FDD bands [1] and a boosted output for Power Class 2 high-power user equipment (HPUE) in TD-LTE [2], [3]. In order to support the 100MHz envelope tracking (ET) BW, the SM must have a 3dB bandwidth of at least 125MHz while keeping sufficient phase margin in the presence of few-hundred-pF load capacitance. Furthermore, a typical linear-assisted SM topology has maximum efficiency limitation due to the AB bias current, sinking- and sourcing-current of the linear amplifier. In this work, a voltage-buffer-compensated (VBC) Class-AB linear amplifier (LA) and a feed-forward fast-switching (FFFS) buck converter are proposed to achieve the 100MHz ET BW and high system-power efficiency.
Year
DOI
Venue
2019
10.1109/ISSCC.2019.8662460
2019 IEEE International Solid- State Circuits Conference - (ISSCC)
DocType
ISBN
Citations 
Conference
978-1-5386-8531-0
1
PageRank 
References 
Authors
0.43
0
15
Name
Order
Citations
PageRank
Ji-seon Paek1165.04
Dong-Su Kim293.25
Jun-suk Bang3114.24
Jong-Beom Baek432.59
Jeong-Hyun Choi531.27
Takahiro Nomiyama6143.24
Jae-yeol Han743.70
Young-Hwan Choo832.28
Yong-Sik Youn9132.16
Euiyoung Park1010.77
Sung-Jun Lee11132.83
Ik-Hwan Kim1252.38
jongwoo lee1376.21
Thomas Byunghak Cho14218.93
Inyup Kang1530432.39