20.7 An RF-PA supply modulator achieving 83% efficiency and -136dBm/Hz noise for LTE-40MHz and GSM 35dBm applications. - Ji-Seon Paek; Yong-Sik Youn; Jeong-Hyun Choi; Dong-Su Kim; Jun-Hee Jung; Young-Hwan Choo; Sung-Jun Lee; Seung-Chul Lee; Thomas Byunghak Cho; Inyup Kang (ISSCC, 2016)

A - 137 dBm/Hz Noise, 82% Efficiency AC-Coupled Hybrid Supply Modulator With Integrated Buck-Boost Converter. - Ji-Seon Paek; Seung-Chul Lee; Yong-Sik Youn; Dong-Su Kim; Jeong-Hyun Choi; Jun-Hee Jung; Young-Hwan Choo; Sung-Jun Lee; Jae-Yeol Han; Thomas Byunghak Cho (IEEE J. Solid State Circuits, 2016)

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. - Takahiro Nomiyama; Yong-Sik Youn; Young-Hwan Choo; Dong-Su Kim; Jae-Yeol Han; Jun-Hee Jung; Jongbeom Baek; Sung-Jun Lee; Euiyoung Park; Jeong-Hyun Choi; Ji-Seon Paek; Jongwoo Lee; et al. (ISSCC, 2018)

An 88%-Efficiency Supply Modulator Achieving 1.08μs/V Fast Transition and 100MHz Envelope-Tracking Bandwidth for 5G New Radio RF Power Amplifier. - Ji-Seon Paek; Dong-Su Kim; Jun-Suk Bang; Jongbeom Baek; Jeong-Hyun Choi; Takahiro Nomiyama; Jae-Yeol Han; Young-Hwan Choo; Yong-Sik Youn; Euiyoung Park; Sung-Jun Lee; Ik-Hwan Kim; et al. (ISSCC, 2019)

Efficient RF-PA Two-Chip Supply Modulator Architecture for 4G LTE and 5G NR Dual-Connectivity RF Front-End. - Ji-Seon Paek; Dongsu Kim; Jae-Yeol Han; Young-Hwan Choo; Jongwoo Lee (VLSI Circuits, 2021)

2-Tx Digital Envelope-Tracking Supply Modulator Achieving 200MHz Channel Bandwidth and 93.6% Efficiency for 2G/3G/LTE/NR RF Power Amplifiers. - Jun-Suk Bang; Dong-Su Kim; Jeongkwang Lee; Sung-Youb Jung; Young-Hwan Choo; Seungchan Park; Young-Ho Jung; Jae-Young Ko; Takahiro Norniyama; Jongbeom Baek; Jae-Yeol Han; Sang-Han Lee; et al. (ISSCC, 2022)

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. - Jeong-Hyun Cho; Dong-Kyu Kim; Hong-Hyun Bae; Yong-Jin Lee; Seok-Tae Koh; Young-Hwan Choo; Ji-Seon Paek; Hyun-Sik Kim (ISSCC, 2022)

A Fully Integrated Multi-Phase Buck Converter With On-Chip Capacitor Dynamic Re-Allocation and Fine-Grained Phase-Shedding Techniques. - Jeong-Hyun Cho; Dong-Kyu Kim; Hong-Hyun Bae; Yong-Jin Lee; Seok-Tae Koh; Young-Hwan Choo; Ji-Seon Paek; Hyun-Sik Kim (IEEE J. Solid State Circuits, 2022)

Efficient RF-PA Two-Chip Supply Modulator Architecture for 4G LTE and 5G NR Dual-Connectivity RF Front End. - Ji-Seon Paek; Dong-Su Kim; Jae-Yeol Han; Young-Hwan Choo; Jun-Suk Bang; Seungchan Park; Jongbeom Baek; Takahiro Nomiyama; Ik-Hwan Kim; Jongwoo Lee (IEEE J. Solid State Circuits, 2022)

5G NR RF PA Supply Modulator Supporting 179ns 0.5-to-5.5V Symbol Power Tracking and Envelope Tracking. - Jun-Suk Bang; Dongsu Kim; Young-Hwan Choo; Ik-Hwan Kim; Seungchan Park; Jeongkwang Lee; Sang-Han Lee; Young-Ho Jung; Jae-Young Ko; Sung-Youb Jung; Jae-Yeol Han; Woosik Kim; et al. (VLSI Technology and Circuits, 2023)

31.3 A 950ns 0.5-to-5.5V 5G NR RF PA Supply Modulator with Floating Capacitor Control for Symbol Power Tracking. - Ik-Hwan Kim; Jeong-Il Seo; Young-Hwan Choo; Seungchan Park; Jae-Yeol Han; Woosik Kim; Sung-Youb Jung; Taehyuk Ko; Dongsu Kim; Jongwoo Lee; Sungung Kwak (ISSCC, 2024)