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오늘 본 자료
0.18um CMOS 공정을 이용한 UHF 대역 RFID 태그 칩 설계
김도희(D. H. Kim),송준호(J. H. Song),조영호(Y. H. Cho),고승오(S. O. Ko),유종근(C. G. Yu) 대한전기학회 2008 대한전기학회 학술대회 논문집 Vol.2008 No.10
본 논문에서는 UHF 대역 RFID의 국제표준인 ISO/IEC 18000-6C 표준을 만족하는 태그 칩을 위한 저전력 고성능 아날로그 회로를 설계 하였다. 설계된 아날로그 회로는 성능 테스트를 위해 메모리 블록을 포함하고 있으며, 태그의 인식률과 경제성을 위해 저전력 및 칩 면적의 최소화에 중점을 두고 설계하였다. 설계된 UHF 대역 RFID 태그용 아날로그 회로는 0.24Vpeak의 RF 입력으로 동작이 가능하며, 칩 면적은 552.5㎛ ×338.8㎛로, UHF 대역 RFID 태그칩에 적합한 작은 면적을 갖는다.
이종원(J. W. Lee),조영호(Y. H. Cho),박관흠(K. H. Park) 한국자동차공학회 1983 오토저널 Vol.5 No.1
This paper presents structural analyses performed on the white body of vehicle using the most competitive analyzer, Finite Element Method, and attempts to obtain design criteria of body.<br/> By applying the substructure and restart technique to structural model, computation time is reduced.<br/> The synthetic processing from modelling to graphic visualization is accomplished by several subprograms, viz., various pre-post processors. On the basis of home-made vehicle modeling, typical cases of accident and service load is analyzed and discussed.<br/> The results obtained will guide the designer to design the structure optimally.
이종원(C.W.Lee),박윤식(Y. S. Park),박관흠(K.H.Park),조영호(Y. H. Cho) 한국자동차공학회 1983 오토저널 Vol.5 No.3
This paper discussed about Application Technique of Numerical Methods for large structure. The dynamic behaviours of a vehicle were investigated through finite element modelling. After dividing a vehicle body into three substructures, Basic Mass System was composed of 60 flexual modes which was obtained from the dynamic characteristics of each substructure using Modal Synthesis Method. Engine, transmission and rear axle, etc. Were added to Basic Mass Model, consequently Full Mass System was constructed by 72 degree of freedoms. Full Mass System was analyzed over the frequency range 0.5-50.0 Hz under the loading conditions which were Stationary Gaussian Random Process.<br/> Results and discussions provided the guidelines to eliminate resonances among the parts and to improve the Ride Quality. The Absorbed Power was used as a standard to determine the Ride Quality. The RMS value of driver's vertical acceleration was obtained 0.423g from the basic model and 0.415g from the modified model.