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Halogen Lamp 설계를 통한 기존 적외선 열화상 기법의 새로운 적용 방법
윤경원(K.W. Yun),정현철(H.C. Jung),선상우(S.W. Seon),정성재(S.J. Jung),강용진(W.J. Kang),김경석(K.S. Kim) 대한기계학회 2012 대한기계학회 춘추학술대회 Vol.2012 No.11
In order to check wall thinning defect of nuclear pipe applied to Infrared Thermography. Optimum test condition of Halogen Lamp deducted for using Worked Artificial defect 4 inch pipe specimen. In this paper, before using Halogen Lamp devised for disadvantage and produced for new Halogen Lamp. In this test, Pipe specimen processed for Using new two Halogen Lamp of 1kw capacity. Wall thinning defects of more than 50% detected to keep Distance 1 ~ 3m and within a range of 500㎜.
40Gbps급 (4X10) VCSEL Array 구동기
김형수,정성재,김두근,이희현,최영완 중앙대학교정보통신연구소 2001 정보통신연구소논문집 Vol.3 No.2
본 논문에서는 VCSEL(Vertical Cavity Surface Emiting Laser)을 채널당 1Gbps로 동작시키고, DC Bias 전류 변화폭과 RF Modulation 전류 변화폭의 조절이 가능한 구동 드라이버를 현대 0.35㎛ 2-Poly 4-Matel CMOS공정을 이용하여 설계했다. In this paper, we present a 40 Gb/s VCSEL driver (4 x 10 channels, 1 Gbps/ch) designed and fabricated in HYNIX 0.35㎛ 2-poly 4-matel CMOS technology. The CMOS driver designed for a free space optical interconnect system is consisted of two NMOS for driving a VCSEL and protection circuit rejecting influence of electro-static discharge (ESD) or unexpected input signal with several tens voltage amplitude. Two NMOS with CMOS channel length of 0.4㎛ and width of 100 ㎛ are used for adjusting dc bias current from 0 to 27 mA and ac modulation current from 0 to 13.8 mA. Protection circuit is made of two diodes. The purpose of the protection circuit is to permit the input modulation voltage range only from 5 to 5 V.