Journal
*Corresponding Author
[J22] Youngin Kim, Laurenz Kulmer, Killian Keller, Jeongsoo Park, Basem Abdelaziz Abdelmagid, Kyung-Sik Choi, Dongwon Lee, Yuqi Liu, Juerg Leuthold, and Hua Wang, "Monolithically Integrated Optical Phased Array for Optical Wireless Communication," in Journal of Lightwave Technology (Early Access).
[J21] Dongwon Lee, Kyung-Sik Choi, Yuqi Liu, Jeongsoo Park, Laurenz Kulmer, Tzu-Yuan Huang, Juerg Leuthold and Hua Wang, "Ultrawideband Distributed Amplifier With Positive Feedback and Intrastack Coupling," in IEEE Journal of Solid-State Circuits (Early Access).
[J20] A. Qahir, D. R. Utomo, B. Yun, K. -S. Choi, D. -W. Park and S. -G. Lee, "High-Power 150/245-GHz Fundamental Oscillators With 12.1/ − 2.54-dBm Peak Output Power for Phased Array Transceivers," in IEEE Journal of Solid-State Circuits (Early Access).
[J19] Min Jae Jung, Sang-Gug Lee, Kyung-Sik Choi, "A new diagnostic indicator for lithium-ion batteries via electrochemical impedance spectroscopy: Harnessing the highest frequency peak indistribution of relaxation times," in Journal of Power Sources, Volume 611, 2024.
[J18] Boce Lin, Kyung-Sik Choi, Hua Wang, “A D-band Swing-Boosting Power Detector with 25kV/W Intrinsic Responsivity and 2.1pW/Hz0.5 NEP in 22nm CMOS FDSOI,” in IEEE Microwave and Wireless Technology Letters, vol. 34, no. 5, pp. 497-500, May 2024.
[J17] Kyung-Sik Choi†, Hokeun Lee†, Byeonghun Yun, and Sang-Gug Lee, “A D-band Low-Noise and High-Gain Receiver Front-End Adopting Gmax-Driven Active Mixer,” in IEEE Transactions on Microwave Theory and Techniques (Accepted). (†Co-first author)
[J16] Dongwon Lee, Doohwan Jung, Fuze Jiang, Gregory Villiam Junek, Jongseok Park, Hangxing Liu, Ying Kong, Adam Wang, Youngin Kim, Kyung-Sik Choi, Jing Wang, and Hua Wang, “A Multi-Functional CMOS Biosensor Array with On-Chip DEP-Assisted Sensing for Rapid Low-Concentration Analyte Detection and Close-Loop Particle Manipulation with No External Electrodes," in IEEE Transactions on Biomedical Circuits and Systems (TBioCAS) (Early Access)
[J15] Hokeun Lee, Byeonghun Yun, Hyoryeong Jeon, Wooyong Keum, Sang-Gug Lee, and Kyung-Sik Choi*, " A D-band Wideband Low-Noise Amplifier Adopting Pseudo-Simultaneous Noise and Input Matched Dual-Peak Gmax-Core," in IEEE Transactions on Microwave Theory and Techniques (Early Access)
[J14] H. -R. Jeon, B. -H. Yun, H. -K. Lee, S. -G. Lee and K. -S. Choi*, "A 250 GHz Wideband Direct-Conversion CMOS Receiver Adopting Baseband Equalized Low-Loss Resistive Passive Mixer," in IEEE Transactions on Circuits and Systems II: Express Briefs, doi: 10.1109/TCSII.2023.3289215
[J13] Keun-Mok Kim, Kyung-Sik Choi*, Hyunki Jung, Byeonghun Yun, Jinglong Xu, Jinho Ko, and Sang-Gug Lee, “A −124-dBm Sensitivity Interference-Resilient Direct-Conversion Duty-Cycled Wake-Up Receiver,” in IEEE Journal of Solid-State Circuits, vol. 58, no. 6, pp. 1667-1680, June 2023, doi: 10.1109/JSSC.2022.3208563
[J12] Hyunki Jung, Kyung-Sik Choi, Keun-Mok Kim, Daehoon Jo, Jusung Kim, Jinho Ko, and Sang-Gug Lee, "CMOS Fractional-N Frequency Synthesizer for UHF RFID Reader Applications With Transformer-Based ISF Manipulation VCO," in IEEE Transactions on Circuits and Systems II: Express Briefs, Oct. 2022, doi: 10.1109/TCSII.2022.3186381
[J11] Hyunki Jung, Kyung-Sik Choi, Jusung Kim, and Sang-Gug Lee, "Analysis and Design of Inductorless Transimpedance Amplifier Employing Nested Feedforward Noise-Canceling Amplifiers," in IEEE Transactions on Microwave Theory and Techniques, vol. 70, no. 8, pp. 3923-3932, Aug. 2022, doi: 10.1109/TMTT.2022.3176872
[J10] Kyung-Sik Choi, Keun-Mok Kim, Jinho Ko, and Sang-Gug Lee, “A 915 MHz Transmitter with 210 μW ULP PLL Employing Frequency Tripler and Digitally Controlled Duty/Phase Calibration Buffer,” in IEEE Journal of Solid-State Circuits, vol. 57, no. 11, pp. 3336-3347, Nov. 2022, doi: 10.1109/JSSC.2022.3172467
[J9] Kyung-Sik Choi, Keun-Mok Kim, Dzuhri Radityo Utomo, In-Young Lee, and Sang-Gug Lee, “A Fully-Integrated 490 GHz CMOS Receiver Adopting Dual-Locking Receiver-Based FLL," in IEEE Journal of Solid-State Circuits, vol. 57, no. 9, pp. 2626-2639, Sept. 2022, doi: 10.1109/JSSC.2022.3159656
[J8] Kyung-Sik Choi, Jinho Ko, Keun-Mok Kim, Jusung Kim, and Sang-Gug Lee, “A 0.3-to-1-GHz IoT Transmitter Employing Pseudo-Randomized Phase Switching Modulator and Single-Supply Class-G Harmonic Rejection PA,” in IEEE Journal of Solid-State Circuits, vol. 57, no. 3, pp. 892-905, March 2022, doi: 10.1109/JSSC.2021.3096945
[J7] Kyung-Sik Choi, Subin Kim, Jinho Ko, and Sang-Gug Lee, “An Active Leakage Canceller Adopting Switched-Capacitor Digital Power Amplifier for UHF-RFID Transceiver,” in IEEE Microwave and Wireless Components Letters, vol. 31, no. 6, pp. 604-607, June 2021, doi: 10.1109/LMWC.2021.3070871
[J6] Subin Kim, Kyung-Sik Choi, Keun-Mok Kim, Jinho Ko, Jusung Kim, and Sang-Gug Lee, “A Low-Noise and Fast-Settling UHF RFID Receiver with Digitally Controlled Leakage Cancellation,” in IEEE Transactions on Circuits and Systems II: Express Briefs, vol. 68, no. 8, pp. 2810-2814, Aug. 2021, doi: 10.1109/TCSII.2021.3066644
[J5] Keun-Mok Kim, Hyun-Gi Seok, Oh-Yong Jung, Kyung-Sik Choi, Byeonghun Yun, Subin Kim, Wonkab Oh, Eui-Rim Jeong, Jinho Ko, and Sang-Gug Lee, “A -123-dBm Sensitivity Split-Channel BFSK Reconfigurable Data/Wake-Up Receiver for Low-Power Wide-Area Networks,” in IEEE Journal of Solid-State Circuits, vol. 56, no. 9, pp. 2656-2667, Sept. 2021, doi: 10.1109/JSSC.2021.3063134
[J4] Keun-Mok Kim, Subin Kim, Kyung-Sik Choi, Hyunki Jung, Jinho Ko, and Sang-Gug Lee, “A Sub-nW Single-Supply 32-kHz Sub-Harmonic Pulse Injection Crystal Oscillator,” in IEEE Journal of Solid-State Circuits, vol. 56, no. 6, pp. 1849-1858, June 2021, doi: 10.1109/JSSC.2020.3016021
[J3] Kyung-Sik Choi, Dae-Woong Park, Dzuhri Radityo Utomo, and Sang-Gug Lee, “500 GHz CMOS heterodyne imager adopting fourth subharmonic passive mixer,” in Microwave and Optical Technology Letters, vol. 62, pp. 683-687, Feb. 2020, doi: https://doi.org/10.1002/mop.32099
[J2] Kyung-Sik Choi, Keun-Mok Kim, Su-Bin Kim, Byeong-Hun Yun, Jinho Ko, Jusung Kim, and Sang-Gug Lee, “A 5.5-dBm, 31.9% Efficiency 915-MHz Transmitter Employing Frequency Tripler and 207-μW Synthesizer,” in IEEE Microwave and Wireless Components Letters, vol. 30, no. 1, pp. 90-93, Jan. 2020, doi: 10.1109/LMWC.2019.2953208
[J1] Kyung-Sik Choi, Dzuhri Radityo Utomo, and Sang-Gug Lee, “A Fully Integrated 490-GHz CMOS Heterodyne Imager Adopting Second Subharmonic Resistive Mixer Structure,” in IEEE Microwave and Wireless Components Letters, vol. 29, no. 10, pp. 673-676, Oct. 2019, doi: 10.1109/LMWC.2019.2936685