EEMIX Lab.

Our group focuses on creating energy-efficient circuits & systems that sense, fuse, and process diverse natural signals—including electrical, optical, and biological signals—by integrating low-power analog, digital, mixed-signal circuits and systems on a single-chip platform.

We also investigate on-chip signal processing and neural network algorithms & architectures for perception, with the goal of realizing intelligent sensors as a key enabler of Physical AI.

EEMIX lab에서는 디지털, 아날로그 전기신호 뿐만 아니라 빛, 생체신호 등과 같은 자연 신호를 감지, 결합, 처리하는 단일 chip 플랫폼 기반의 energy-efficient 회로 및 시스템을 연구한다. 이러한 단일 chip에 집적되는 저전력 아날로그 회로, 혼성신호 회로 및 디지털 회로를 연구한다. 또한 온-칩 신호처리, 사물 인식/인지를 위한 신경망 알고리즘 및 구조를 연구하여 Physical AI의 핵심인 지능형센서를 구현하는 것을 목표로 한다.

We invite you to browse our website to learn more about us and our research!

To Future EEMIXers

EEMIX Lab에서는 함께 연구할 석/박사, 석박통합과정 학생들을 모집합니다. 학비 및 생활비 장학금을 지원합니다. EEMIX Lab은 다년간 반도체 회로 분야 최고 학회인 ISSCC. VLSI Symposium 및 최고 학술지인 JSSC에 다양한 집적회로 및 시스템들을 발표하였으며, 창의적이고 열정적인 여러분과 함께 연구하여 혁신적인 지능형센서 SoC를 구현하는 것을 목표로 합니다. 저전력 아날로그/혼성신호 회로 및 시스템, 이미지센서, LiDAR센서, Vision센서 SoC에 관심있는 학생들은 연락하세요. (choix215@skku.edu).

EEMIX is now open for creative and self-motivated students (M.S, Ph.D). Please contact prof. Choi (choix215@skku.edu) for detailed information.

Growing Capability

Full-Chip Design Capability 매년 2회 이상 EEMIX Lab에서 진행되는 chip design & fabrication 중 1회 이상 full-chip design에 참여하여 설계 경험을 쌓고, 칩 설계 역량을 배양할 수 있도록 합니다.

Extending Vision

EEMIX Lab 신입생은 매년 미국 San Francisco에서 개최되는 ISSCC 학회 및 실리콘밸리 견학을 통해 시야를 넓히며, 재학중 다양한 국제 학술대외 참석 기회를 가집니다.
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Past News & Highlights

11/08/2024 [Invited Talk] Prof. Choi was invited to give a plenary talk at International Workshop on Image Sensors and Imaging Systems (IWISS). The title is "CMOS Direct Time-of-Flight Sensor for Solid-State LiDAR Systems".
11/05/2024 [Invited Talk] Prof. Choi was invited to give a talk at IEEE/IEIE International Conference on Consumer Electronics Asia (ICCE-Asia). The title is "Review of CMOS LiDAR Sensor for Solid-State LiDAR Systems".
10/15/2024 [Paper] Wonjong, Hyeongseok, Heesung, Minkyung's paper was accepted to be published in IEEE A-SSCC 2024. The title is "A 400x112 CMOS LiDAR Sensor with Reconfigurable-Resolution Histogramming Time-to-Digital Converters and Sub-cm Depth Refining Filter".
05/01/2024 [Paper] Jinpyo, Houk, Heesung's paper was accepted to be published in IEEE VLSIC 2024. The title is "A Digital Dynamic Vision Sensor with SPAD pixels and Multi-Event Generation for Motion/Vibration-Adaptive Detection".
03/02/2024 [Welcome] Sunwoo Eurm, Junsang Bae, Donghyuk Kim, Jaemin Lee, Hanseok Kim, and Minsu Hong joined EEMIX.
11/23/2023 [Paper] Minkyung, Hyeongseok, and Songhyun's paper was accepted to be published in IEEE ISSCC 2024. The title is "A 320x240 CMOS LiDAR Sensor with 6-Transistor nMOS-Only SPAD Analog Front-End and Area-Efficient Priority Histogram Memory".
09/01/2023 [Welcome] Taehoon Jeon, Jungho Shin joined EEMIX.
07/01/2023 [Project] EEMIX started research on "Design of SPAD Farm Chip", funded by DB Hitek.
04/01/2023 [Project] EEMIX started research on "Short-Wave InfraRed (SWIR) Image Sensors", funded by MOTIE.
03/01/2023 [Project] EEMIX started research on "ROIC for Long-Wave InfraRed (LWIR) Image Sensors", funded by Samsung Electronics.
03/02/2023 [Welcome] Kihoon Kim, Sehoon Lee, and Bongju Lee joined EEMIX.
03/01/2022 [Welcome] Kihoon Kim joined EEMIX.
11/01/2022 [Paper] Hyeongseok and Kihwan's paper was published in IEEE Sensors Journal. The title is "Multievent Histogramming TDC with Pre-Post Weighted Histogramming Filter for CMOS LiDAR Sensors".
09/01/2022 [Paper] Yongsung's paper was published in IEEE ACCESS. The title is "A 2.03-mW CMOS Image Sensor With an Integrated Four-Stacked Charge-Recycling Driver for Image Signal Transmission".
09/01/2022 [Welcome] Jin Heo and Soodong Woo joined EEMIX.
07/01/2022 [Paper] Yeonsoo's paper was published in IEEE TCAS-I: Regular Papers. The title is "A Low-Power Indirect Time-of-Flight CMOS Image Sensor with Fixed Depth Noise Compensation and Dual-Mode Imaging for Depth Dynamic Range Enhancement".
06/15/2022 [Project] EEMIX started research on "Ultra Low-Noise Image Sensors", funded by MOTIE.
03/02/2022 [Welcome] Jinpyo Han, Jaewook Nam, and Heesung Lee joined EEMIX.
11/01/2021 [Paper] Yeonsoo's paper was published in IEEE A-SSCC 2021. The title is "A 70mW Indirect Time-of-Flight Image Sensor with Depth Dynamic Range Enhancement and Fixed Depth Noise Compensation".
11/01/2021 [Invited Talk] Hyeongseok was invited to give a talk at Hyundai Mobis. The title is "CMOS LiDAR sensor for automotive applications".
10/20/2021 [Paper] Wonhui's paper was published in IEEE TCAS-II. The title is "CMOS Image Sensor with Two-Step Single-Slope ADCs and a Detachable Super Capacitive DAC".
10/05/2021 [Invited Talk] Hyeongseok was invited to give a talk at Samsung Electronics. The title is "Single-Photon Image Sensors".
08/01/2021 [Award] Hyeongseok won "Outstanding Researcher Award (삼성전자전략산학 우수연구자상)" by Samsung Electronics.
05/01/2021 [Paper] Kihwan and Hyeongseok's paper was accepted to be published in IEEE VLSIC 2021. The title is "A CMOS LiDAR Sensor with Pre-Post Weighted-Histogramming for Sunlight Immunity Over 105 klx and SPAD-based Infinite Interference Cancelling".
04/01/2021 [Project] EEMIX started research on "CMOS Direct TOF sensor IC", funded by SK Hynix.
03/02/2021 [Welcome] Songhyeon Kim, Wonjong Roh, Seungik Jo, Minkyung Kim, and Junkyu Lee joined EEMIX.
02/15/2020 [Award] Prof. Choi won 'Silkroad Award' in ISSCC'21.
01/14/2021 [Paper] Hyeongseok's paper was published in IEEE JSSC. The title is "Direct TOF Scanning LiDAR Sensor With Two-Step Multievent Histogramming TDC and Embedded Interference Filter".
11/10/2020 [Award] Prof. Choi and Donguk won "Outstanding Invention Award (SK하이닉스 산학과제 우수발명상)" by SK Hynix.
10/01/2020 [Paper] Hyunsub and Junhyung's paper was published in IEEE Access. The title is "CMOS Skin Sensor for Mobile Skin Diagnosis using an Electronic Cotton Pad".
09/15/2020 [Paper] Donguk, Yeonsoo, Kiwhan's paper was published in IEEE JSSC. The title is "Indirect Time-of-flight CMOS Image Sensor with On-chip Background Light Cancelling and Pseudo 4-Tap/2-Tap Hybrid Imaging for Motion Artifact Suppression".
09/07/2020 [Award] Hyeongseok and Kihwan won "Minister's Award (산업통상자원부장관상)" in Korea Semiconductor Design Contest.
09/01/2020 [Welcome] Hyeongjoon Kim and Younghoon Lee joined EEMIX.
07/20/2020 [Award] Hyeongseok won "Outstanding Researcher Award (삼성전자전략산학 우수연구자상)" by Samsung Electronics.
05/21/2020 [Award] Hyeongseok's paper "A 36-Channel SPAD-Integrated Scanning LiDAR Sensor with Multi-Event Histogramming TDC and Embedded Interference Filter" in Symposium on VLSI Circuits 2020 was selected as a highlighted paper.
05/18/2020 [Paper] Hyeongseok's paper was accepted to be published in IEEE VLSIC 2020. The title is "A 36-Channel SPAD-Integrated Scanning LiDAR Sensor with Multi-Event Histogramming TDC and Embedded Interference Filter".
04/01/2020 [Project] EEMIX started research on "LiDAR Sensor for Mobile Devices", funded by MOTIE.
03/01/2020 [Project] EEMIX started research on "Ultra Low-Power Depth Sensor SoC for Next-generation AR Glasses", funded by NRF.
03/01/2020 [Welcome] Jaeyoung Ahn joined EEMIX.
02/15/2020 [Award] Donguk, Yeonsoo, and prof. Choi won 'Silkroad Award' in ISSCC'20.
02/10/2020 [Award] Prof. Choi won 'Best Researcher Award' in SKKU IICT.
12/08/2019 [Invited Talk] Prof. Choi was invited to give a talk at SK Hynix. The title is "Direct ToF CMOS LiDAR Sensors"
11/25/2019 [Paper] Donguk, Yeonsoo, Kiwhan's paper was accepted to be published in IEEE ISSCC 2020. The title is "A Dynamic Pseudo 4-Tap CMOS Time-of-Flight Image Sensor with Motion Artifact Suppression and Background Light Cancelling Over 120klux".
09/26/2019 [Award] Donguk and Yeonsoo won 'SiliconWorks Prize' in Korea Semiconductor Design Contest.
09/01/2019 [Welcome] Howook Lee joined EEMIX.
09/01/2019 [Paper] Donguk's paper was published at MDPI Sensors. The title is "Indirect Time-of-Flight Depth Sensor with Two-Step Comparison Scheme for Depth Frame Difference Detection"
04/01/2018 [Paper] Hyeongseok's paper was published at IET Electronics Letters. The title is "Histogram-based mixed-signal time-to-digital converter array for direct time-of-flight depth sensors"
10/01/2018 [Project] EEMIX started research on "Time-of-Flight CMOS Image Sensor", funded by SK Hynix.
09/01/2018 [Paper] Hyeongseok's paper was published at IET Electronics Letters. The title is "CMOS depth sensor with programmable filter circuits for environment-adaptive noise suppression"
08/08/2018 [Invited Talk] Prof. Choi was invited to give a talk at SK Hynix. The title is "Time-of-Flight CMOS Image Sensors"
07/01/2018 [Welcome] Yeonsoo Ahn and Kiwhan Cho joined EEMIX.
09/01/2017 [Welcome] Hyunsub Rie, Wonhee Park, Joonhyung Cho joined EEMIX.
07/01/2017 [Project] EEMIX started research on "High-Speed AFE & Time-to-Digital Converter", funded by Samsung Electronics.
07/01/2017 [Project] EEMIX started research on "Always-On CMOS Imaging SoC", funded by MOTIE, Korea.
07/01/2017 [Project] EEMIX started research on "iToF CMOS Image Sensor for Handheld Devices", funded by MOTIE, Korea.
03/01/2017 [Project] EEMIX started research on "High-Precision Time-to-Digital Converter", funded by Samsung Electronics.
03/04/2017 [Welcome] Yongsung Cho joined EEMIX.
03/01/2017 [Project] EEMIX started research on "High-Sensitivity Fingerprint Sensor", funded by ETRI.
02/01/2017 [Welcome] Dong-Wook Kim joined EEMIX.
11/17/2016 [Invited Talk] Prof. Choi was invited to give a talk at International Workshop on Image Sensors and Imaging System. The title is "Always-On CMOS Image Sensors: Energy-Efficient Circuits & Architecture"
10/26/2016 [Invited Talk] Prof. Choi was invited to give a talk at ISOCC. The title is "Review of Low Power Image Sensors for Always-On Imaging"
10/26/2016 [Paper] Prof. Choi's paper was published at IEEE Trans. on Consumer Electronics. The title is "Biometrics for Electronic Eyes: System Authentication with Embedded CMOS Image Sensor"
09/01/2016 [Welcome] Hyeongseok Seo joined EEMIX.
08/01/2016 [Paper] Prof. Choi's paper was published at IET Electronics Letters. The title is "Integrated visual sensor with 2D/3D imaging and in-situ proximity sensing for mobile devices"
06/01/2016 [Project] EEMIX started research on "Sensors for Self-Driving Car", funded by NRF.
04/26/2016 [Invited Talk] Prof. Choi was invited to give a talk at UNIST, Korea. The title is "Always-On Image Sensor: Energy-Efficient Circuits and Architecture"
03/01/2016 [Paper] Prof. Choi's paper was published at IEEE Journal of Solid-State Circuits (JSSC). The title is "Always-On CMOS Image Sensor for Mobile and Wearable Devices"
03/01/2016 [Welcome] Prof. Choi joined Sungkyunkwan University.

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We invite you to browse our website to learn more about us and our research!

To Future EEMIXers

Growing Capability

Extending Vision

Recent News & Highlights

Past News & Highlights