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전자공학과 부준호 석박통합과정,JSSC 2021 논문 Invite▲ (왼쪽부터) 전자공학과 안길초 교수, 부준호 석박통합과정 전자공학과 부준호 석박통합과정(지도교수 안길초)이 아날로그 회로설계 분야 가장 권위있는 국제 저널인 IEEE Journal of Solid-State Circuits(2020년 기준 JCR impact factor 5.013, 동(同) 분야 최상위) 2021에 Invite 되었다. IEEE Journal of Solid-State Circuits (JSSC)는 집적 회로의 트랜지스터 수준 설계에 특히 중점을 둔 광범위한 반도체 회로 분야에서 매달 논문을 발행하는 저널이다. 또한, IC 설계와 직접 관련된 회로 모델링, 기술, 시스템 설계, 레이아웃 및 테스트와 같은 주제를 다룬다. 해당 논문의 제목은 "A Single-Trim Switched Capacitor CMOS Bandgap Reference With a 3σ Inaccuracy of +0.02%, −0.12% for Battery-Monitoring Applications"이며, 부준호 학생은 본 논문을 통해 상온에서의 단 한번의 보정만을 이용하고, 추가적인 디지털단의 보상 없이 가장 저렴한 비용으로, 가장 높은 수준의 정확도를 가지는 Bandgap reference를 개발하였다. 그림 1. 부준호 학생이 제안한 구조 그림 2. 부준호 학생이 제안한 회로도
2021.11.22
전자공학과 한주혜 석사, TCAS-II 2021 논문 Invite ▲ (왼쪽부터) 전자공학과 안길초 교수, 한주혜 석사 전자공학과 한주혜 석사(지도교수 안길초)이 아날로그 회로설계 분야 국제 저명 저널인 IEEE Transactions on Circuits and Systems II: Express Briefs(2020년 기준 JCR impact factor 3.292) 2021에 Invite 되었다. IEEE Transactions on Circuits and Systems II: Express Briefs (TCAS II)는 이론, 분석, 설계 및 회로의 실제 구현과 시스템 및 신호 처리에 대한 회로 기술의 응용으로 지정된 분야의 간략한 논문을 발표한다. 기본 과학 이론에서 산업 응용에 이르기까지 전체 스펙트럼이 포함된다. 해당 논문의 제목은 "A 96dB Dynamic Range 2kHz Bandwidth 2nd Order Delta-Sigma Modulator Using Modified Feed-Forward Architecture With Delayed Feedback"이며, 한주혜 석사는 본 논문을 통해 기존 Feed-Forward 구조의 Delta-Sigma ADC를 변형하여 저가의 공정비용과 초저전력으로 16-bit 수준의 고해상도의 센서용 ADC를 개발하였다. 그림 1. 한주혜 석사가 제안한 구조 그림 2. 한주혜 석사가 제안한 회로도 및 타이밍도
2021.11.22
전자공학과 곽용식 박사, A-SSCC 2021 논문 accept ▲ (왼쪽부터) 전자공학과 안길초 교수, 곽용식 박사 전자공학과 곽용식 박사(지도교수 안길초)가 아날로그 회로설계 분야 국제 저명 학회인 IEEE A-SSCC 2021(Asian Solid-State Circuits Conference)에서 발표하였다. IEEE A-SSCC는 반도체 및 반도체 분야에서 가장 최신의 첨단 칩과 회로 설계를 발표하기 위한 국제 포럼이며, 이 학회는 IEEE Solid-State Circuits Society가 지원하며 아시아에서 개최되고 있다. 해당 논문의 제목은 "A 0.9V 0.022mm2 103dB DR Switched-Capacitor Audio Delta-Sigma Modulator Using Input-Referred kT/C Noise Reduction Technique"이며, 곽용식 박사는 본 논문을 통해 input-referred kT/C noise reduction을 사용한 SC audio delta-sigma (ΔΣ) modulator를 세계 최초로 제안 및 개발하였다. ▲곽용식 박사가 제안한 구조본 논문에서 곽 박사는 kT/C noise requirement를 만족하기 위한 캐패시터의 물리적인 한계를 극복하여 초소면적의 audio delta-sigma (ΔΣ) modulator를 구현하였다.
2021.11.12
Lee Jae-sung in Master's Program in Electronic EngineeringReceives AWAD 2021 Young Researcher Award ▲(From left) Professor Choi Woo-young, Department of Electronic Engineering, Lee Jae-sung, Master’s Program Lee Jae-sung (supervisor prof. Choi Woo-young), a student in the master’s program in the Department of Electronic Engineering, received the Young Researcher Award at the Asia-Pacific Workshop on Fundamentals and Applications of Advanced Semiconductor Devices (AWAD), held from August 26 to 27, 2021, for his thesis. AWAD, which started in 1993 and celebrated its 28th anniversary this year, is an international conference on cutting-edge semiconductors held alternately in Korea and Japan. The Young Researcher Award is a special award given to excellent thesis presenters that year.The title of Lee Jae-sung’s award-winning paper is “Nonvolatile Content-Addressable Memory using Nanoelectromechanical Memory Switches for Data-Intensive Computation”. In this thesis, for the first time in the world, Lee presented and analyzed a new content-addressable memory (CAM) structure using a nanoelectromechanical (NEM) device in order to overcome the existing CAM’s density and power efficiency limitations. ▲ Schematic diagram of content-addressable memory (CAM) using nanoelectromechanical (NEM) device The proposed CAM is about 67% smaller in area than the existing CAM and can perform high-speed and high-efficiency operations. It is expected to be implemented and applied in the fields of big data and artificial intelligence in the future. Lee Jae-sung said, “This study’s success is all thanks to the encouragement and support of my supervisor professor. Using this award as motivation, I would like to grow further and contribute to the development of Korea’s semiconductor industry.”
2021.09.08
Professor Choi Woo-young, Department of Electronic Engineering,Selected for Targeted Topic Research Support Project in the 2021 SSTF Fund Grant Program Professor Choi Woo-young’s research in the Department of Electronic Engineering was finally selected for the ‘2021 Targeted Topic Research Support Project (semiconductor device and process field) in the Fund Grant Program of the Samsung Science & Technology Foundation (SSTF).’ The SSTF Fund Grant Program is a public service project that Samsung Electronics has been conducting through donations of KRW 1.5 trillion since 2013, with the goal of nurturing and supporting science and technology to lead the future of Korea. Samsung Electronics announced that it would adopt 12 research projects in six fields, including ‘△Advanced AI △Next-generation encryption systems △B(Beyond) 5G&6G △Robotics △Next-generation displays △Semiconductor devices and process,’ totaling KRW 15.21 billion in support funds. Professor Choi will receive a research grant of KRW 1.2 billion for the next three years for his research project ‘Development of a multi-bit content-addressable memory device that uses a single ferroelectric transistor and can evaluate data consistency.’ He plans to secure the source technology in the memory field by developing the world’s best content-addressable memory device. Professor Choi introduced an alternative memory method called ‘content-addressable memory (CAM)’ in order to overcome the critical situation for existing memory dependent on random-access memory (RAM), such as SRAM, DRAM, and flash memory, which are not suitable for the high-speed and large-capacity data-retrieval required for big data and artificial intelligence fields, both of which have recently been in the spotlight. ▲ Diagram comparing operation methods between RAM (random-access memory), the mainstream of existing memory technology, and CAM (Content-Addressable Memory), to be developed in this study Whereas the conventional random-access memory (RAM) was a sequential memory operation that relied on visible addresses, content-addressable memory (CAM) compares all data stored in memory with the data to be retrieved into parallel processing based on the content. As the study proceeds, it is expected to present an optimal solution to the current technological situation where the data capacity increases and the demand for high-speed search operations also needs to be increased.Professor Choi said, “I am delighted to receive positive evaluations for the proposals for challenging tasks that go beyond the limits of existing semiconductors and the presentation of concrete measures. I would like to continue to draw outstanding research results that can improve Korea’s semiconductor status and cultivate excellent human resources.”
2021.08.12
The 1st Prize in Naver CLOVA AI RUSH Contest ▲ (From left) Professor Kang Suk-ju from the Department of Electronic Engineering,Kong Dae-hyeon, Master’s Course Student Kong Dae-hyeon, a student in the master’s program (under advisor Professor Kang Suk-ju) and currently enrolled in the Department of Electronic Engineering, achieved excellent results in the CLOVA AI RUSH contest hosted by Naver. The contest was held in a non-face-to-face format over the course of 46 days from May 22 to July 1, 2021, with challenges related to various data and questions provided by Naver. Kong was awarded 1st place in the 1st round, ‘Shopping AI Development – Shopping Category Classification,’ and was also honored with 1st place in the final 2nd round, ‘Shopping AI Development – Shopping Catalog Clustering.’ Models that achieved excellent results in this project are given the opportunity to apply to Naver services (Naver Map, Blog, Naver Shopping, Smart Editor, and music-recommendation service) and are given the chance to provide their items to tens of millions of Naver users. In addition to a prize of KRW 15 million, as first-prize winner, Kong will be given the opportunity to complete a 2021 summer internship at Naver and recruitment privileges for exempting documents and coding tests when applying for Naver recruitment.When asked about the experience, Kong said, “It was very rewarding to be able to contribute to the price-comparison function on Naver Shopping, which is a service I often use. It was great to build up my data-processing and development skills in a short period of time by directly dealing with real-world data that is usually difficult to access for common users. I would like to thank the professor and lab members for their generous support and consideration, which allowed me to participate in the competition.”
2021.07.26
Sogang Included in Preliminary Selectionfor Phase Four of Brain Korea 21 Project (BK21) The Ministry of Education and National Research Foundation of Korea (NRF) have announced the preliminary selection results for Phase Four of the Brain Korea 21 project (BK 21), which supports universities with research funds and other aid for stabilized academic research and technological development in new industries. Sogang University has been honored with the selection of three Educational Research Centers and five Educational Research Teams, as follows: Educational Research Centers:△ Fostering Talents in Future Brain-copied Intelligent Semiconductor Innovation (7 professors from Department of Electronic Engineering)△ Mobile Blockchain-based Intelligent Healthcare Solution for Areas of Disasters/Emergencies (7 professors from Department of Electronic Engineering)△ Fostering World Highest-standard Practical Big Data Convergence (12 professors from Department of Computer Science and Engineering)Educational Research Teams:△ Roots-based Politics (6 professors from Department of Political Science)△ Anti-stress Bio-molecular Function (7 professors from Department of Life Sciences)△ Molecular Control-based Chemical and Biochemical Engineering Process (7 professors from Department of Chemical and Biomolecular Engineering)△ Fostering Professionals in K-MENA (4 professors from Department of History)△ Smart Mechanical Technology for Social Value Creation (7 professors from Department of Mechanical Engineering) Accordingly, Sogang will be provided research funds for seven years (beginning in September 2020) in three stages - totaling approximately 80% more than the funds received for Phase Three of BK21 (2013 to 2020) - indicating a more stabilized fostering of graduate and doctoral researchers to lead the Fourth Industrial Revolution. President Park Jong Gou noted, "This preliminary selection for Phase Four of BK21 is the result of Sogang members' efforts and cooperation," and expressed his hope that this will serve as momentum for more students to concentrate on research and grow into convergent human resources that will be much needed for the future society."
2020.08.27
Winner of the Excellent Design and Excellent Poster Awardsat the 27th Korean Conference on Semiconductors Professor Choi Woo Young's research team won the Excellent Design Award and the Excellent Poster Award at the 27th Korean Conference on Semiconductors (KCS) held in Gangwon-do in February. This conference, which is a major academic conference in the field of semiconductors, was arranged to discuss semiconductor technology innovation that will lead the next generation of major ICT convergence technologies and directions for the future. Kwon Hyug Su, who received the excellent design award, is in doctoral program in the Department of Electronic Engineering (Advisor: Prof. Choi Woo Young). He was the first in the world to experimentally implement the single tile operation of CMOS-NEM reconfigurable logic device/circuit using a nanoelectromechanical (NEM) device. The CMOS-NEM reconfigurable logic device/circuit presented through this study was implemented based on 65 nm process technology, and the NEM device responsible for signal change was implemented in the post-process wiring section. This device/circuit is expected to have a chip density 4.6 times higher, an operating frequency 2.3 times higher, and a power consumption 9.3 times lower than a conventional CMOS device-only circuit. With higher speed and lower power consumption equivalent to the ASIC (Application Specific Integrated Circuit) level, it is also expected to make a great contribution to implementing a field-programmable gate array (FPGA) with microprocessor-level operational flexibility. This technology, implemented for the first time in the world, has the characteristics of a source technology that can change the paradigm of semiconductor technology, not just the field of reconfigurable logic device/circuit technology. In the short term, it is possible to expand into the field of ultra-low-power memory-in-logic and analog computing, and ultimately, it is expected to enable the emergence of ultra-low-power three-dimensional neuro-simulation semiconductor chips. ▶Thesis Title: Monolithic three-dimensional (M3D) CMOS- Nanoelectromechanical (NEM) Single-tile Reconfigurable Logic (RL)▶Authors: Kwon Hyug Su (First author), Ph.D. candidate, and Professor Choi Woo Young (Second author) In the same competition, Kang Min Hee, a master's student in Electronic Engineering (Advisor: Prof. Choi Woo Young) was awarded the Outstanding Poster Award in recognition of its contribution to improving the reliability of NEM by alleviating the stress of NEM through selection line optimization. The NEM of the selection line optimization structure presented this time was verified for its efficacy through the finite element method, and showed that the stress concentrated on the anchor part of the NEM was reduced as the selection line was reduced. In addition, the optimal selection line length was demonstrated, showing the change in NEM pull-in voltage that occurs while reducing the selection line. The NEM of the selection line optimization proposed by the research team is expected to reduce stress by over 40% compared to the existing structure. Through this, it is expected that the proposed structure will greatly contribute to improving the reliability of CMOS-NEM hybrid circuits. ▶Thesis Title: Selection Line Optimization of Nanoelectromechanical (NEM) Memory Switches for Stress Relief▶Authors: Kang Min Hee, Master's candidate (First author), Professor Choi Woo Young (second author)
2020.04.21
Professor Kang Suk-ju at Sogang University Selected as the Recipient of‘IEEE/IEIE Joint Award for IT Young Engineers’ Professor Kang Suk-ju from the Department of Electronic Engineering of Sogang University (president: Jong Gou Park) has won the ‘IEEE/IEIE Joint Award for IT Young Engineers.’ The award is co-hosted by the internationally renowned Institute of Electrical and Electronics Engineers (IEEE, president José M.F. Moura) and the Institute of Electronics and Information Engineers (IEIE, president Cheon Won Choi from Dankook University), and supported by Haedong Science Foundation (chairman Kim Young-jae, CEO of Daeduck Electronics). The award ceremony was held at Maison GLAD Jeju on June 27 at 6:00 P.M. This year’s winner, Prof. Kang from Sogang University, has conducted research on an image and video processing system, next-generation display system, and deep learning-based hardware system. Fifty-five of his treatises have appeared in SCI journals and 85 in international academies, with 30 national and international patent applications and registrations from his research achievements. His treatises have been quoted over 1,000 times and contributed to academic and technological advancements. As chairman of IEEE’s International Standard Display Group, Prof. Kang, has also made great contributions to standardization and technology commercialization through the technological transfer of image and video signals processing. More recently, the professor has developed a lightweight deep learning-based system required for image creation in virtual reality displays for the first time in the world, and is currently focusing on research and development for deep learning-based systems which can be applied to a wide variety of fields. Meanwhile, the award recipient was carefully selected on the basis of technical viability, social and environmental contributions, and originality. The countries which established a joint award with IEEE include Chile, Ecuador, Peru, Singapore, and Italy.
2019.12.09
The joint research team led by Prof. Song Tai-Kyong and prof. Chang Jin-Ho from the Department of Electronic Engineering at Sogang University developed a world-first convergence imaging technology to innovatively improve the accuracy of sentinel lymph node biopsy guidance, which is used to detect breast carcinoma metastasis. Through preclinical testing, the effects and availability were technically proven for clinical usage. The outcome of the research was posted in the March 22nd issue of Scientific Reports, an affiliated journal of Nature (https://www.nature.com/articles/srep45008).If this equipment for convergence imaging diagnosis, which is being developed at this time, is commercialized, the limitations will be overcome for treatment and diagnosis using a single imaging device. For instance, preclinical testing has demonstrated that the precise identification of the sentinel lymph node (the primary lymph node that a cancer cell passes through in the case of metastasis) and the accuracy of biopsy guidance can be enhanced.Prof. Song said, “Thanks to this technology, ultrasonic and photo-acoustic images are now available ahead of biopsy guidance, and doctors can reconfirm during the biopsy procedure whether the lymph node to be removed is the signal lymphatic gland or not, using the fluorescent images.” He added, “This enables fast and accurate biopsy procedures and a minimum incision on the part to be used for the biopsy. It is expected that more accurate decisions on carcinoma metastasis and biopsy procedures will minimize the side effects and complications that a patient must endure.”It is also projected that the technology will be utilized for clinical applications in a variety of ways, such as through convergence image guidance surgeries aimed at enhancing the accuracy of cancer tumor removal.
2019.10.22