Jun Yeon Won, PhD,
Seoul National University/Samsung Electronics

Journal Publications (First author)

1. J. Y. Won, S. I. Kwon, H. S. Yoon, G. B. Ko, J. -W. Son and J. S. Lee, "Dual-Phase Tapped-Delay-Line Time-to-Digital Converter With On-the-Fly Calibration Implemented in 40 nm FPGA," in IEEE Transactions on Biomedical Circuits and Systems, vol. 10, no. 1, pp. 231-242, Feb. 2016, doi: 10.1109/TBCAS.2015.2389227.

2. J. Y. Won and J. S. Lee, "Time-to-Digital Converter Using a Tuned-Delay Line Evaluated in 28-, 40-, and 45-nm FPGAs," in IEEE Transactions on Instrumentation and Measurement, vol. 65, no. 7, pp. 1678-1689, Jul. 2016, doi: 10.1109/TIM.2016.2534670.

3. J. Y. Won, G. B. Ko and J. S. Lee, "Delay grid multiplexing: simple time-based multiplexing and readout method for silicon photomultipliers," in Physics in Medicine & Biology, vol. 61, no. 19, pp. 7113–7135, Sep. 2016, doi: 10.1088/0031-9155/61/19/7113. 

4. J. Y. Won and J. S. Lee, "Highly Integrated FPGA-Only Signal Digitization Method Using Single-Ended Memory Interface Input Receivers for Time-of-Flight PET Detectors," in IEEE Transactions on Biomedical Circuits and Systems, vol. 12, no. 6, pp. 1401-1409, Dec. 2018, doi: 10.1109/TBCAS.2018.2865581.

5. J. Y. Won, G. B. Ko, K. Y. Kim, H. Park, S. Lee, J.-W. Son and J. S. Lee. "Comparator-less PET data acquisition system using single-ended memory interface input receivers of FPGA," in Physics in Medicine & Biology, vol. 65, no. 15, Jul. 2020, doi: 10.1088/1361-6560/ab8689 

6. J. Y. Won, H. Park, S. Lee, J.-W. Son, Y. Chung, G. B. Ko, K. Y. Kim, J. Song, S. Seo, Y. Ryu, J.-Y. Chung and J. S. Lee,  "Development and Initial Results of a Brain PET Insert for Simultaneous 7-Tesla PET/MRI Using an FPGA-Only Signal Digitization Method," in IEEE Transactions on Medical Imaging, vol. 40, no. 6, pp. 1579-1590, Jun. 2021, doi: 10.1109/TMI.2021.3062066.

Journal Publications (Co-author)

1. J.-W. Son, G. B. Ko, J. Y. Won, H. S. Yoon and J. S. Lee. "Development and Performance Evaluation of a Time-of-Flight Positron Emission Tomography Detector Based on a High-Quantum-Efficiency Multi-Anode Photomultiplier Tube," in IEEE Transactions on Nuclear Science, vol. 63, no. 1, pp. 44-51, Feb. 2016, doi: 10.1109/TNS.2015.2514118.

2. J.-W. Son, K. Y. Kim, H. S. Yoon, J. Y. Won, G. B. Ko, M. S. Lee and J. S. Lee. "Proof-of-concept prototype time-of-flight PET system based on high-quantum-efficiency multi-anode PMTs," in Medical Physics, vol. 44, no. 10,  pp. 5314–5324, Jun. 2017.

3. S. Lee, M. S. Lee, J. Y. Won and J. S. Lee. "Performance of a new accelerating-electrode-equipped fast-time-response PMT coupled with fast LGSO," in Physics in Medicine & Biology, vol. 63, no. 5, Mar. 2018, doi: 10.1088/1361-6560/aaad20

4. S. Pourashraf, A. Gonzalez-Montoro, J. Y. Won, M. S. Lee, J. W. Cates, Z. Zhao, J. S. Lee and C. S. Levin. " Scalable electronic readout design for a 100 ps coincidence time resolution TOF-PET system," in Physics in Medicine & Biology, vol. 66, no. 8, Apr. 2021, doi: 10.1088/1361-6560/abf1bc

5. S. Pourashraf, A. Gonzalez-Montoro, M. S. Lee, J. W. Cates, J. Y. Won, J. S. Lee and C. S. Levin. "Investigation of Electronic Signal Processing Chains for a Prototype TOF-PET System With 100-ps Coincidence Time Resolution," in IEEE Transactions on Radiation and Plasma Medical Sciences, vol. 6, no. 6, pp. 690-696, July 2022, doi: 10.1109/TRPMS.2021.3124756.

Conference Publications (First author)

1. J. Y. Won, S. Jeong, S. Lee, M. Kang, I. Yang, J. Choi, "FPGA-Only Implementation of MIPI C-PHY Receiver Using Blind Oversampling CDR for CMOS Image Sensors," In Proceedings of the 2025 ACM/SIGDA International Symposium on Field Programmable Gate Arrays (FPGA '25). Association for Computing Machinery, New York, NY, USA, 247–256.
   (17 regular papers accepted among 82 submissions)

Conference Publications (Co-author)

1. S. Pourashraf, Z. Zhao, A. Gonzalez - Montoro, J. W. Cates, J. Y. Won, J. S. Lee and C. S Levin, "Design Considerations for 3D Position Sensitive Scintillation Detectors that Achieve 100 ps Coincidence Time Resolution," 2021 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC), Piscataway, NJ, USA, 2021, pp. 1-3, doi: 10.1109/NSS/MIC44867.2021.9875609.

2. S. Pourashraf, A. Gonzalez - Montoro, J. W. Cates, Z. Zhao, J. Y. Won, J. S. Lee and C. S Levin, "Dynamic Time-Over-Threshold Readout for Improved Energy Linearity in PET Detectors that Achieve 100 ps CTR," 2021 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC), Piscataway, NJ, USA, 2021, pp. 1-3, doi: 10.1109/NSS/MIC44867.2021.9875634.

3. S. Lee, C. Park, M. Kang, J. Y. Won, H. Ryu, J. Choi, "4.5 Gsps MIPI D-PHY Receiver Circuit for Automatic Test Equipment," 2022 IEEE International Test Conference (ITC), Anaheim, CA, USA, 2022, pp. 563-567, doi: 10.1109/ITC50671.2022.00073.

4. S. Lee, M. Kang, C. Park, J. Y. Won and J. Choi, "Method for Adjusting Termination Resistance Using PMU in DC Test," 2023 IEEE International Test Conference (ITC), Anaheim, CA, USA, 2023, pp. 77-81, doi: 10.1109/ITC51656.2023.00020.

5. S. Lee, J. Y. Won, C. Park, M. Kang and J. Choi, "Method for Diagnosing Channel Damage Using FPGA Transceiver," 2023 IEEE International Test Conference (ITC), Anaheim, CA, USA, 2023, pp. 71-76, doi: 10.1109/ITC51656.2023.00019.

6. S. Lee, M. Kang, C. Park, J. Y. Won, J. Choi and C. Park, "Probe Card Ground Noise Canceling Circuit," 2024 IEEE International Test Conference (ITC), San Diego, CA, USA, 2024, pp. 56-60, doi: 10.1109/ITC51657.2024.00019.

International Conference Presentations (First author)

1. J. Y. Won, S. I. Kwon, H. S. Yoon, G. B. Ko and J. S. Lee. A 40-channel sub-20-ps dual tapped-delay-line time-to-digital converter implemented in a 40-nm FPGA. 2013 IEEE NSS/MIC.

2. J. Y. Won, S. I. Kwon, H. S. Yoon, G. B. Ko and J. S. Lee. A 40-channel dual tapped-delay-line time-to-digital converter with real-time bin width calibration capability implemented in a high-end FPGA. CJK 2013. 

3. J. Y. Won, H. S. Yoon and J. S. Lee. A fully pipelined on-the-fly calibration architecture for a time-to-digital converter using the prefix adder. IEEE RT 2014. 

4. J. Y. Won and J. S. Lee. Linearity improvement of the FPGA-based time-to-digital converter (TDC) using dual-output tapped-delay line. 2014 IEEE NSS/MIC. 

5. J. Y. Won, G. B. Ko and J. S. Lee. Delay grid multiplexing: time-based positioning method for silicon photomultiplier. 2015 IEEE NSS/MIC. 

6. J. Y. Won, G. B. Ko and J. S. Lee. Delay grid multiplexing: light sharing capable and scalable time-based positioning method. 2016 IEEE NSS/MIC. 

7. J. Y. Won, J.-W. Son, K. Y. Kim, H. Park, M. S. Lee, S. Lee, G. B. Ko and J. S. Lee. Development and initial results of a prototype brain PET scanner using a time-based digitizer and an FPGA-based real-time coincidence processor. 2018 SNMMI Annual Meeting (YIA Competition).

8. J. Y. Won and J. S. Lee. Highly integrated FPGA-only signal digitization method using single-ended memory interface input receivers. 2018 IEEE NSS/MIC (IEEE NPSS Student Paper Award, Fourth Place).

9. J. Y. Won, G. B. Ko, J.-W. Son and J. S. Lee. 165-channel comparator-less time-based DAQ system using single-ended memory interface input receiver of FPGA. 2018 IEEE NSS/MIC (IEEE NPSS Christopher J Thompson Student Award Finalists).

10. J. Y. Won, H. Park, S. Lee, J.-W. Son, G. B. Ko, K. Y. Kim, Y. Chung and J. S. Lee. Development of 7T-MR compatible brain PET inserts using highly-integrated FPGA DAQ systems. 2019 PSMR.

11. J. Y. Won, H. Park, J.-W. Son and J. S. Lee. Development of Front-end and Back-end FPGA DAQ Systems Using Comparator-less Gated QTC and Gigabit Transceiver for the MR-Compatible Long Axial FOV Brain PET Inserts. 2019 IEEE NSS/MIC.

Domestic Conferences (First author)

1. J. Y. Won, S. I. Kwon, H. S. Yoon, G. B. Ko and J. S. Lee. Development of multichannel time-to-digital converter with real-time calibrator. KOSOMBE 2013 May. 

2.  J. Y. Won, H. S. Yoon, G. B. Ko and J. S. Lee. Development of a fast and high-resolution FPGA-based time-to-digital converter. KSMP 2014 April.

3. J. Y. Won and J. S. Lee. Linearized tapped-delay-line time-to-digital converter for time-of-flight positron emission tomography. KJMP 2014 September. 

4. J. Y. Won, G. B. Ko and J. S. Lee. Fully time-based multiplexing method for PET scanners. KSNM 2016 October.

5. J. Y. Won, G. B. Ko and J. S. Lee. Time-based DAQ system for simultaneous brain PET/MR scanners. KSNM 2017 November (YIA competition).

6. J. Y. Won and J. S. Lee. Highly integrated FPGA-only signal digitization method using single-ended memory interface input receivers for time-of-flight PET detectors. KSNM 2018 October.

International Patents

1. J. S. Lee and J. Y. Won. Heterogeneous sampling delay line-based time to digital converter. (US 9891594)

2. S. Jeong and J. Y. Won. Semiconductor device testing and clock recovery. (US12021961B2)

3. S. Lee, J. Y. Won, M. Kang, C. Park and J. Choi. Semiconductor test devices, systems including the same, and methods for testing the same. (US US20240319265A1)

Domestic Patents

1. J. S. Lee and J. Y. Won. Delay line time-to-digital converter. (Korea 10-1541175)

2. J. S. Lee and J. Y. Won. Heterogeneous sampling delay-line time-to-digital converter. (Korea 10-1639064)

3. J. S. Lee and J. Y. Won. Photodetector. (Korea 10-1825623)

4. J. Y. Won and J. S. Lee. Digital integrated circuit and detection module (Korea 10-2127067)

Career

2019.10.~                                                   Staff Engineer

              Samsung Electronics Mechatronics Research

2019.9.~  2019.9                                     Post-doc

                               Institute of Radiation Medicine, Medical Research Center, 

              Seoul National University College of Medicine 

Education 

2013.3.~  2019.8                                     Integrated master’s & doctoral program

                               Department of Biomedical Sciences

                         Seoul National University, Seoul, Republic of Korea

Thesis: Highly integrated time-based data acquisition system using FPGA for PET scanners

  Advisor: Jae Sung Lee

2009.3. ~ 2013.2                                    B.S., School of Electrical and Computer Engineering (summa cum laude), 

                                                 Department of Electrical and Computer Engineering

                                                 Seoul National University, Seoul, Republic of Korea

                                                 Thesis: Plasmonic wave collimator using gradient index (GRIN) lenses

   Advisor: Byoungho Lee

Experiences

2019.6.                       Visiting Scientist, Molecular Imaging Instrumentation Laboratory, Stanford University, CA

2013.3. ~                    Research Scientist, Department of Nuclear Medicine, Seoul National Univ. Hospital, Seoul, Republic of Korea

Projects

2016.6. ~ 2021.5.     Core Technologies for Next-Generation Ultra-Low-Dose PET System 

(grant funded by Korea Ministry of Science and ICT, NRF-2016R1A2B3014645)

2014.7. ~ 2019.6.     7T MR-Compatible PET System for the Investigation of Brain Diseases 

(grant funded by Korea Ministry of Science and ICT, NRF-2014M3C7034000)

2010.7. ~ 2013.6.     Development of Core Technologies for Time-of-Flight PET 

(grant funded by Korea Ministry of Science and ICT, NRF-2010-0026012)

Honors and Awards

2019.6.             IEEE Glenn F. Knoll Graduate Educational Grant (from IEEE Nuclear & Plasma Sciences Society)

2019.2.             The Best Paper Award (from Korea Research Foundation Brain Korea 21 Plus)

2018.11.            2018 IEEE Nuclear Science Symposium Fourth Place Student Paper Award (from IEEE Nuclear & Plasma Sciences Society)

2018.11.            2018 Paul Phelps Continuing Education Grant (from IEEE Nuclear & Plasma Sciences Society)

2018.11.            2018 Conference Trainee Grant (from IEEE Nuclear & Plasma Sciences Society)

2018.6.             The Young Investigator Award, Honorable Mention (from Society of Nuclear Medicine Computer and Instrumentation Council) 

2017.2.             The Best Paper Award (from Korea Research Foundation Brain Korea 21 Plus)

2016.11.            2016 Paul Phelps Continuing Education Grant (from IEEE Nuclear & Plasma Sciences Society)

2016.11.            2016 Conference Trainee Grant (from IEEE Nuclear & Plasma Sciences Society)

2016.2.             The Best Paper Award (from Korea Research Foundation Brain Korea 21 Plus)

2015.11.            2015 Valentin T. Jordanov Radiation Instrumentation Travel Grant (from IEEE Nuclear & Plasma Sciences Society)

2015.11.            2015 Conference Trainee Grant (from IEEE Nuclear & Plasma Sciences Society)

2015.2.             The Best Paper Award (from Korea Research Foundation Brain Korea 21 Plus)

2014.9.             The Best Oral Presentation (from Korea-Japan Joint Meeting on Medical Physics)

2014.4.             The Best Oral Presentation (from Korean Society of Medical Physics)

2013.2.             The Excellency Prize, summa cum laude (from Seoul National University)

Skills and Expertise

FPGA (custom FPGA PCB layout, Verilog HDL) 

CMOS image sensor interface (MIPI C/D-PHY)

Automatic test equipment (ATE)

Time-to-digital converter (TDC)

Analog & digital circuit design

Positron Emission Tomography (PET)

Medical imaging instrumentation

Silicon photomultiplier (SiPM)

Radiation detector

Photon counting

Tools

Circuit design

• Capture

• Allegro PCB editor

FPGA Design Tools

• Vivado (AMD)

• Quartus (Altera)

HDL Simulator

• Questasim

• Modelsim

MATLAB

Python

3D CAD

• Solid Edge

• SOLIDWORKS

Contact

e-mail: wnsusl1029@gmail.com (wnsusl1029@snu.ac.kr)

Google Scholar: https://scholar.google.co.kr/citations?user=21xCVMAAAAAJ&hl=en

ResearchGate: https://www.researchgate.net/profile/Jun_Yeon_Won

LinkedIn: https://www.linkedin.com/in/jun-yeon-won-b67507149

References

Prof. Jae Sung Lee (Supervisor),                                                    

Department of Nuclear Medicine                                                    

Seoul National University College of Medicine           

28 Yeongeon-dong, Jongno-gu, Seoul 03080, Republic of Korea

e-mail: jaes@snu.ac.kr

Hompage: http://biomed.snu.ac.kr/research/fmisl/