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서용진(Y. J. Seo),김길호(K. H. Kim),이우선(W. S. Lee) 대한전기학회 2006 대한전기학회 학술대회 논문집 Vol.2006 No.7
An electrostatic discharge (ESD) protection device, so called, N-type SCR with P-type MOSFET pass structure (NSCR_PPS), was analyzed for high voltage I/O applications. A conventional NSCR_PPS device shows typical SCR-like characteristics with extremely low snapback holding voltage, which may cause latchup problem during normal operation. However, a modified NSCR_PPS device with proper junction/channel engineering demonstrates highly latchup immune current-voltage characteristics.
서용진(Y. J. Seo),김길호(K. H. Kim),이우선(W. S. Lee) 대한전기학회 2006 대한전기학회 학술대회 논문집 Vol.2006 No.7
An electrostatic discharge (ESD) protection device, so called, N-type extended drain silicon controlled rectifier (NEDSCR) device, was analyzed for high voltage I/O applications. A conventional NEDSCR device shows typical SCR-like characteristics with extremely low snapback holding voltage. This may cause latchup problem during normal operation. However, a modified NEDSCR device with proper junction / channel engineering demonstrates itself with both the excellent ESD protection performance and the high latchup immunity.
Y형 유공벽 케이슨 방파제의 해수유입특성에 관한 수리실험
오상호(S. H. Oh),박우선(W.S. Park),이오진(O.-J. Lee) 한국해양환경·에너지학회 2006 한국해양환경공학회 학술대회논문집 Vol.2006 No.-
Y형 유공벽 형식의 케이슨 방파제에 대한 수리모형실험을 수행하여 규칙파 및 불규칙파의 해수유입특성을 고찰하였다 통수로를 통한 실질적인 해수유입특성을 분석하기 위해서 자료 분석 시간 동안의 통수로 내 평균유속을 무차원화한 값 vnet√2gH를 계산하였다. 유공벽의 폐쇄 높이가 정수면에 위치할 때 해수유입량이 가장 컸으며, 이 경우 유수실 폭의 영향은 미미하였다. 또한 불규칙파의 경우에는 무차원순유속이 반사계수 및 전달계수와 선형 상관관계를 나타내었다. The inflow characteristics of the caisson breakwater with Y -shaped perforated wall were investigated by carrying out hydraulic experiments in a wave flume by generating regular and irregular waves. In order to analyze substantial inflow characteristics, the normalized mean net inflow velocity, vnet√2gH was calculated. The inflow flux was maximized when a part of the perforated wall beneath the mean water level was closed by attaching a non-perforated wall plate, whereas the effects of the chamber width were insignificant in this condition. It was found that the normalized mean net inflow velocity has a linear relationship with reflection and transmission coefficients for irregular waves.