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100% ASK 수신기를 위한 13.56㎒ RFID Tag용 클럭 복원회로 설계
김지곤(Jigon Kim),이경일(Kyeong-il Yi),김현식(Hyunsik Kim),김재환(J. H. Kim),김효종(Hyojong Kim),김시호(Shiho Kim) 대한전자공학회 2008 電子工學會論文誌-SD (Semiconductor and devices) Vol.45 No.11
ASK 100% RF 입력신호를 이용하는 13.56㎒ RFID 태그를 위한 클럭 복원회로를 제안하였다. 제안한 클럭 복원회로는, 레지스터로 조절되는 DLL을 이용하여 입력 RF 신호의 크기가 0인 구간에서도 기준 클럭 신호를 사용하지 클럭을 생성하도록 설계되었다. 제안한 회로는 TSMC 0.18㎛ 1P6M 공정을 사용하여 설계하였으며, 제안된 회로는 DLL의 위상 잠김 시간이 6.4usec 이하이며 공급전압이 3.3V에서 43uW를 소모한다. We have proposed a clock recovery circuit for 13.56㎒ RFID Tags using 100%, ASK RF input signal. The proposed clock recovery circuit generates clock pulses without reference clock by adapting register controlled DLL. The proposed circuit have designed by using a TSMC 0.18㎛ 1P6M CMOS technology. The simulated results show that the phase locking time of the proposed circuit is about 6.4 usec and power consumption is about 43㎼ at supply voltage of 3.3V.
김시호(Shiho Kim) 대한전기학회 2022 전기의 세계 Vol.71 No.4
2022년대 연구의 화두는 디지털 산업혁명을 가능하게하는 인공지능, Web3.0, 탄소중립 등의 핵심 기술들이다. 그러면, 디지털 산업혁명의 결과물로써 우리 생활과 산업을 가장 크게 변화시킬 제품이 무엇인가 살펴보면, 바로 자율주행 가능한 미래차이다. 미래차는 전기동력에 기반하고 인간의 능력을 넘어서는 인공지능 기술이 필수적이므로 전기공학이 연구의 중심이며, 많은 가능성과 기회를 가지게 된다. The primary research topics in 2022 may be the core technologies such as artificial intelligence, Web3.0, and carbon-free energy source that enable the digital industrial revolution. We may imagine the product that will change our lives and industries the most thanks to the digital industrial revolution: it is the future self-driving car. Electrical engineering is at the center of research issues for Future electrified, autonomous vehicles, and we have many possibilities and opportunities in the 4th industrial revolution.
김재관(Jaekwan Kim),배일(Il Bae),김시호(Shiho Kim) 한국자동차공학회 2012 한국자동차공학회 학술대회 및 전시회 Vol.2012 No.11
We proposed a steering control method for an autonomous vehicle by controlling the steering rate instead of the steering angle. The lateral dynamic model of this work is based on the bicycle model of the vehicle. The proposed kinetic model is implemented in LabVIEW Design and Simulation module. The trajectory of vehicle obtained from simulations shows predicted Clothoid spirals when a steering rate input changes from driving straight lane to circular road. The proposed model was verified by LabVIEW simulations of lane change test. The proposed steering model can be applied to a real 4 wheel-car eventhough its based on bicycle model assumption, because difference between left and right wheel angle is easliy considered by Ackerman turning geometry. The proposed method will be applied to trajectory planing and steering controller algorithm for development of unmanned autonomous vehicles.
Nam-Jae Kim,Hyun-Ju Lee,Shiho Kim 대한전자공학회 2012 Journal of semiconductor technology and science Vol.12 No.1
We propose and implement a single-wire communication protocol for thermal management systems using thin film thermoelectric modules for 3D IC cooling. The proposed single-wire communication protocol connects the temperature sensors, located near hot spots, to measure the local temperature of the chip. A unique ID number identifying the location of each hot spot is assigned to each temperature sensor. The prototype chip was fabricated by a 0.13 ㎛ CMOS MPW process, and the operation of the chip is verified.