M. Cho, M. Kang, M. Um, H. Park, and H.-M. Lee, "CMOS LIF Neurons with Local Membrane Dynamic Biasing Based on Reciprocal Inhibition for Self-Oscillatory Neural Networks," IEEE Transactions on Biomedical Circuits and Systems, vol. 19, no. 6, pp. 1213-1225, Dec. 2025. 

M. Kang, M. Um, J. Won, J. Kang, S. Hong, N. Han, S. Kim, S. Kim, and H.-M. Lee, "An Analog Neuromorphic On-Chip Training System with IGZO TFT-Based 6T1C Synaptic Memory," IEEE Journal of Solid-State Circuits, vol. 60, no. 11, pp. 4128-4139, Nov. 2025. 

J. Ahn, S. H. Choi, M. Um, J. Y. An, and H.-M. Lee, "An Area and Power Efficient Source Driver IC with Multi-Line Sensing Real-Time Pixel Compensation for OLED Displays," IEEE Journal of Solid-State Circuits, vol. 60, no. 11, pp. 3908-3919, Nov. 2025. 

M. Um, M. Kang, K. Eom, H. Kwak, K. Noh, J. Lee, J. Son, J. Kwon, S. Kim, and H.-M. Lee, "A Multi-bit ECRAM-Based Analog Neuromorphic System with High-Precision Current Readout Achieving 97.3% Inference Accuracy," IEEE Transactions on Biomedical Circuits and Systems, vol. 19, no. 3, pp. 590-604, Jun. 2025. 

H. Jo, M. Kang, M. Um, J. Kim, K.-W. Kwon, S. Kim, and H.-M. Lee, "Verification of Neuromorphic Processing Accuracy against Non-Ideal Errors in Synapse-based Neural Network Systems," International​ ​Journal​ ​of​ ​Circuit​ ​Theory​ ​and​ ​Applications, vol. 53, no. 1, pp. 453-465, Jan. 2025. 

K. Noh, H. Kwak, J. Son, S. Kim, M. Um, M. Kang, D. Kim, W. Ji, J. Lee, H. Jo, J. Woo, H.-M. Lee, and S. Kim, "Retention-Aware Zero-Shifting Technique for Tiki-Taka Algorithm-Based Analog Deep Learning Accelerator," Science Advances, vol. 10, no. 24, Jun. 2024. 

J. Won, J. Kang, S. Hong, N. Han, M. Kang, Y. Park, Y. Roh, H. Seo, C. Joe, U. Cho, M. Kang, M. Um, K.-H. Lee, J.-E. Yang, M. Jung, H.-M. Lee, S. Oh, S. Kim, and S. Kim, "Device-Algorithm Co-Optimization for an On-Chip Trainable Capacitor-Based Synaptic Device with IGZO TFT and Retention-Centric Tiki-Taka Algorithm," Advanced Science, vol. 10, no. 29, Oct. 2023.  

M. Um and H.-M. Lee, "A Fault-Tolerant Current-Starved Ring Oscillator with Signal-Flip Protection Delay Cells against Radiation Effects," IEEE Transactions on Circuits and Systems II, vol. 70, no. 3, pp. 880-884, Mar. 2023. 

D. Ro, M. Um, and H.-M. Lee, "A Soft-Error-Tolerant SAR ADC with Dual-Capacitor Sample-and-Hold Control for Sensor Systems," Sensors, vol. 21, no. 14, Jul. 2021. 

S. Kim, W. Song, J. Son, M. Kang, M. Um, J. Byun, J. Choi, S. Bae, B. Kang, R.-H. Baek, J.-Y. Sim, H.-M. Lee, and S. Kim, "First M3D-Integrated 4K ECRAM Chip with Sub-100 nm Channels Achieving 100% Yield and Highly Uniform Performance for Analog AI Computing," IEEE International Electron Devices Meeting (IEDM), Dec. 2025. 

J. Ahn, S. H. Choi, J. An, M. Um, and H.-M. Lee, "A Real-Time Pixel-Compensated Source Driver IC with Dual Slope Error Detection and Multi-Channel Time-Multiplexing Compensator for Compact OLED Displays," IEEE International Solid-State Circuits Conference (ISSCC), Feb. 2025. 

M. Kang, M. Um, J. Won, J. Kang, S. Hong, N. Han, S. Kim, S. Kim, and H.-M. Lee, "An Analog Neuromorphic On-Chip Training System with IGZO TFT-Based 6T1C 367-State Synaptic Memory Achieving 0.99-R2 Linearity and 104-Times Enhanced Retention Time," IEEE Custom Integrated Circuits Conference (CICC), Apr. 2024. 

M. Um, M. Kang, H. Kwak, K. Noh, S. Kim, and H.-M. Lee, "An ECRAM-Based Analog Compute-in-Memory Neuromorphic System with High-Precision Current Readout for Deep Learning," IEEE Biomedical Circuits and Systems Conference (BioCAS), Oct. 2023. 

M. Cho, M. Kang, M. Um, H. Park, and H.-M. Lee, "CMOS Leaky Integrate-and-Fire Neurons with Local Dynamic Biasing and Inhibitory Self-Oscillation," IEEE Biomedical Circuits and Systems Conference (BioCAS), Oct. 2023. 

H.-M. Lee, M. Um, M. Kang, "Variable-bit adaptive sensing circuit system in analog neuromorphic systems", US patent, US19185582 filed on Apr. 22, 2025. 

H.-M. Lee, M. Kang, M. Um, "Error compensation circuit for analog capacitor memory circuits", US patent, US17851696 filed on Jun. 28, 2022, and US12009039B2 issued on Jun. 11, 2024.  

H.-M. Lee, M. Kang, M. Um, "Neuromorphic circuit capable of setting negative weights and back propagation", US patent, US17825574 filed on May 26, 2022, and US12493780B2 issued on Dec. 9, 2025.  

이형민, 강민일, 엄민성, "아날로그 메모리 기반 뉴로모픽 시스템의 디지털 변환 피드백 루프 회로 장치", 출원번호 10-2025-0126803, 출원일 2025.09.05. 

이형민, 엄민성, 강민일, "아날로그 뉴로모픽 시스템에서의 가변 비트 적응적 센싱 회로 시스템", 출원번호 10-2024-0135318, 출원일 2024.10.07, 등록번호 10-2884494, 등록일 2025.11.06. 

이형민, 엄민성, 강민일, "서로 다른 종류의 아날로그 시냅스 소자를 동시 구동 가능한 회로 시스템", 출원번호 10-2024-0130765, 출원일 2024.09.26, 등록번호 10-2873183, 등록일 2025.10.15. 

이형민, 강민일, 엄민성, "아날로그 캐패시터 메모리 회로의 오차 보상 회로", 출원번호 10-2021-0103839, 출원일 2021.08.06. 

이형민, 강민일, 엄민성, "역전파와 음수 가중치 설정이 가능한 뉴로모픽 회로", 출원번호 10-2021-0088327, 출원일 2021.07.06, 등록번호 10-2574156, 등록일 2023.08.30. 

이형민, 김영민, 조만희, 유호영, 김현주, 이상일, 엄민성, "역공학 방법", 출원번호 10-2020-0063832, 출원일 2020.05.27, 등록번호 10-2290427, 등록일 2021.08.10. 

이형민, 엄민성, 노덕훈, "외부 간섭에 견고한 디지털 로직 회로 및 이를 포함하는 장치", 출원번호 10-2019-0152648, 출원일 2019.11.25, 등록번호 10-2116486, 등록일 2020.05.22. 

H. Jo, M. kang, M. Um, and H.-M. Lee, "Analog Read/Update Peripheral Circuits for Neuromorphic Systems," IEEE/IEIE International Conference on Electronics, Information, and Communication (ICEIC), Feb. 2022. 

M. Um, D. Ro, M. Kang, I. J. Chang, and H.-M. Lee, "Recent Advances in Radiation-Hardened Sensor Readout Integrated Circuits," Journal of Semiconductor Engineering, vol. 1, no. 3, Dec. 2020. 

M. Um, D. Ro, I. J. Chang, and H.-M. Lee, "A Radiation-Hardened Readout Integrated Circuits for Sensor Systems," IEEE/IEIE International Conference on Consumer Electronics Asia (ICCE-Asia), Nov. 2020.