A 2TX supply modulator for envelope-tracking power amplifier supporting intra- and inter-band uplink carrier aggregation and power class-2 high-power user equipment
Nomiyama, Takahiro, Yongsik Youn, Younghwan Choo, Dongsu Kim, Jaeyeol Han, Junhee Jung, Jongbeom Baek, Sungjun Lee, Euiyoung Park, Jeonghyun Choi, Ji-Seon Paek, Jongwoo Lee, Cho, Thomas Byunghak, Inyup Kang
Published in 2018 IEEE International Solid - State Circuits Conference - (ISSCC) (01.02.2018)
Published in 2018 IEEE International Solid - State Circuits Conference - (ISSCC) (01.02.2018)
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Conference Proceeding
Wide battery range supply modulator with reverse current protection in envelope tracking operation
Ji-Seon Paek, Younghwan Choo, Yong-Sik Youn, Jongwoo Lee, Cho, Thomas Byunghak
Published in 2017 IEEE MTT-S International Microwave Symposium (IMS) (01.06.2017)
Published in 2017 IEEE MTT-S International Microwave Symposium (IMS) (01.06.2017)
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Conference Proceeding
A Fully Integrated Multi-Phase Buck Converter With On-Chip Capacitor Dynamic Re-Allocation and Fine-Grained Phase-Shedding Techniques
Cho, Jeong-Hyun, Kim, Dong-Kyu, Bae, Hong-Hyun, Lee, Yong-Jin, Koh, Seok-Tae, Choo, Younghwan, Paek, Ji-Seon, Kim, Hyun-Sik
Published in IEEE journal of solid-state circuits (01.12.2022)
Published in IEEE journal of solid-state circuits (01.12.2022)
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Journal Article
Design of Boosted Supply Modulator With Reverse Current Protection for Wide Battery Range in Envelope Tracking Operation
Paek, Ji-Seon, Kim, Dongsu, Choo, Younghwan, Youn, Yong-Sik, Lee, Jongwoo, Cho, Thomas Byung-Hak
Published in IEEE transactions on microwave theory and techniques (01.01.2019)
Published in IEEE transactions on microwave theory and techniques (01.01.2019)
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Journal Article
Efficient RF-PA Two-Chip Supply Modulator Architecture for 4G LTE and 5G NR Dual-Connectivity RF Front End
Paek, Ji-Seon, Kim, Dongsu, Han, Jae-Yeol, Choo, Younghwan, Bang, Jun-Suk, Park, Seungchan, Baek, Jongbeom, Nomiyama, Takahiro, Kim, Ik-Hwan, Lee, Jongwoo
Published in IEEE journal of solid-state circuits (01.04.2022)
Published in IEEE journal of solid-state circuits (01.04.2022)
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Journal Article
31.3 A 950ns 0.5-to-5.5V 5G NR RF PA Supply Modulator with Floating Capacitor Control for Symbol Power Tracking
Kim, Ik-Hwan, Seo, Jeong-Il, Choo, Younghwan, Park, Seungchan, Han, Jaeyeol, Kim, Woosik, Jung, Sungyoub, Ko, Taehyuk, Kim, Dongsu, Lee, Jongwoo, Kwak, Sungung
Published in 2024 IEEE International Solid-State Circuits Conference (ISSCC) (18.02.2024)
Published in 2024 IEEE International Solid-State Circuits Conference (ISSCC) (18.02.2024)
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Conference Proceeding
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
Paek, Ji-Seon, Kim, Dongsu, Bang, Jun-Suk, Baek, Jongbeom, Choi, Jeonghyun, Nomiyama, Takahiro, Han, Jaeyeol, Choo, Younghwan, Youn, Yongsik, Park, Euiyoung, Lee, Sungjun, Kim, Ik-Hwan, Lee, Jongwoo, Cho, Thomas Byunghak, Kang, Inyup
Published in 2019 IEEE International Solid- State Circuits Conference - (ISSCC) (01.02.2019)
Published in 2019 IEEE International Solid- State Circuits Conference - (ISSCC) (01.02.2019)
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Conference Proceeding
A 1.23W/mm2 83.7%-Efficiency 400MHz 6-Phase Fully Integrated Buck Converter in 28nm CMOS with On-Chip Capacitor Dynamic Re-Allocation for Inter-Inductor Current Balancing and Fast DVS of 75mV/ns
Cho, Jeong-Hyun, Kim, Dong-Kyu, Bae, Hong-Hyun, Lee, Yong-Jin, Koh, Seok-Tae, Choo, Younghwan, Paek, Ji-Seon, Kim, Hyun-Sik
Published in 2022 IEEE International Solid- State Circuits Conference (ISSCC) (20.02.2022)
Published in 2022 IEEE International Solid- State Circuits Conference (ISSCC) (20.02.2022)
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Conference Proceeding
2-Tx Digital Envelope-Tracking Supply Modulator Achieving 200MHz Channel Bandwidth and 93.6% Efficiency for 2G/3G/LTE/NR RF Power Amplifiers
Bang, Jun-Suk, Kim, Dongsu, Lee, Jeongkwang, Jung, Sungyoub, Choo, Younghwan, Park, Seungchan, Jung, Young-Ho, Ko, Jae-Young, Nomiyama, Takahiro, Baek, Jongbeom, Han, Jaeyeol, Lee, Sang-Han, Kim, Ik-Hwan, Paek, Ji-Seon, Lee, Jongwoo, Cho, Thomas Byunghak
Published in 2022 IEEE International Solid-State Circuits Conference (ISSCC) (20.02.2022)
Published in 2022 IEEE International Solid-State Circuits Conference (ISSCC) (20.02.2022)
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Conference Proceeding
5G NR RF PA Supply Modulator Supporting 179ns 0.5-to-5.5V Symbol Power Tracking and Envelope Tracking
Bang, Jun-Suk, Kim, Dongsu, Choo, Younghwan, Kim, Ik-Hwan, Park, Seungchan, Lee, Jeongkwang, Lee, Sang-Han, Jung, Young-Ho, Ko, Jae-Young, Jung, Sungyoub, Han, Jaeyeol, Kim, Woosik, Paek, Ji-Seon, Lee, Jongwoo
Published in 2023 IEEE Symposium on VLSI Technology and Circuits (VLSI Technology and Circuits) (11.06.2023)
Published in 2023 IEEE Symposium on VLSI Technology and Circuits (VLSI Technology and Circuits) (11.06.2023)
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Conference Proceeding
Efficient RF-PA Two-Chip Supply Modulator Architecture for 4G LTE and 5G NR Dual-Connectivity RF Front-End
Paek, Ji-Seon, Kim, Dongsu, Han, Jae-Yeol, Choo, Younghwan, Lee, Jongwoo
Published in 2021 Symposium on VLSI Circuits (13.06.2021)
Published in 2021 Symposium on VLSI Circuits (13.06.2021)
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Conference Proceeding