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Hyeon-Ji Choi

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2026
[c8]
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Hyeon-Ji Choi, Joo-Mi Cho, Sang-Yun Nam, Sung-Wan Hong:
A 94.8%-Peak-Efficiency Double Step-Up SIBO Converter Achieving 88% Output Ripple Reduction for AMOLED Display. ISSCC 2026: 324-326
[c7]
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Hyun-Woo Jeong, Chan-Ho Lee, Hyeon-Ji Choi, Sung-Wan Hong:
26.6 a 92.4%-Peak-Efficiency 48V to 0.8-to-1.6V Hybrid Converter with Inductor-Interleaved Fibonacci Switched-Capacitor. ISSCC 2026: 456-458
2025
[j3]
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  - journals/lssc/ChoiCPLH25
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Hyeon-Ji Choi, Joo-Mi Cho, Hyo-Jin Park, Seok-Jun Lee, Sung-Wan Hong:
A 0-to- 10μF Off-Chip Output Capacitor-Scalable Boost Converter Achieving 96.68% Peak Efficiency. IEEE Solid State Circuits Lett. 8: 233-236 (2025)
2024
[j2]
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Hyo-Jin Park, Joo-Mi Cho, Hyeon-Ji Choi, Chan-Ho Lee, Young-Jun Jeon, Jeeyoung Shin, Woong Choi, Junwon Jeong, Sung-Wan Hong:
A Simultaneous Energy Transferring SIBO Converter Achieving Low Ripple and High Efficiency for AMOLED Applications. IEEE J. Solid State Circuits 59(5): 1497-1508 (2024)
[c6]
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Hyeon-Ji Choi, Chan-Ho Lee, Young-Jun Jeon, Hyeonho Park, Jeong-Hun Kim, Young-Jin Woo, Ju-Pyo Hong, Haifeng Jin, Sung-Wan Hong:
8.7 A 92.7% Peak Efficiency 12V-to-60V Input to 1.2V Output Hybrid DC-DC Converter Based on a Series-Parallel-Connected Switched Capacitor. ISSCC 2024: 156-158
2023
[j1]
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  - journals/tie/ChoiBHKJYCPLPBOALH23
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Hyeon-Ji Choi, Chisung Bae, Yeunhee Huh, Sang Joon Kim, Seungchul Jung, Kye-Seok Yoon, Joo-Mi Cho, Hyo-Jin Park, Chan-Ho Lee, Su-Min Park, Esun Baik, Young-Ju Oh, Ho-Chan Ahn, Chan-Kyu Lee, Sung-Wan Hong:
An Ultra-Low Power Soft-Switching Self-Oscillating SIMO Converter for Implantable Stimulation Systems. IEEE Trans. Ind. Electron. 70(8): 8603-8608 (2023)
[c5]
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  - conf/esscirc/AhnCCLLH23
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Ho-Chan Ahn, Joo-Mi Cho, Hyeon-Ji Choi, Chan-Ho Lee, Chan-Kyu Lee, Sung-Wan Hong:
A 2 A Maximum Load Current Capable 0-to-1 μF Off-chip Capacitor N-type LDO using Dual Dynamic Negative Feedback Loop and an Improved Error Amplifier. ESSCIRC 2023: 249-252
[c4]
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  - conf/vlsit/LeePCCJH23
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Chan-Ho Lee, Hyo-Jin Park, Joo-Mi Cho, Hyeon-Ji Choi, Young-Jun Jeon, Sung-Wan Hong:
A 1V 20.7μW Four-Stage Amplifier Capable of Driving a 4-to-12nF Capacitive Load with >1.07MHz GBW with an Improved Active Zero. VLSI Technology and Circuits 2023: 1-2
[c3]
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Hyo-Jin Park, Joo-Mi Cho, Hyeon-Ji Choi, Chan-Ho Lee, Sung-Wan Hong:
96.48% Peak-Efficiency Continuous-Current Step-Up Battery Charger (CC-SUBC) with Dual Energy-Harvesting Sources for Automotive Application. VLSI Technology and Circuits 2023: 1-2
2022
[c2]
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Young-Ju Oh, Hyo-Jin Park, Joo-Mi Cho, Hyeon-Ji Choi, Su-Min Park, Chan-Ho Lee, Esun Baik, Chan-Kyu Lee, Ho-Chan Ahn, Sung-Wan Hong:
A High Slew-rate Wide-range Capacitive Load Driving Buffer Amplifier with Correlated Dual Positive Feedback Loops. ISOCC 2022: 231-232
2021
[c1]
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  - conf/asscc/ChoiCPH21
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Hyeon-Ji Choi, Joo-Mi Cho, Hyo-Jin Park, Sung-Wan Hong:
An Output Capacitor-less Low-dropout Regulator using a Wide-range Single-stage Gain-boosted Error Amplifier and a Frequency-dependent Buffer with a Total Compensation Capacitance of 2.5 pF in 0.5 µm CMOS. A-SSCC 2021: 1-3

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