http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : 김연규(Yon Kyu Kim) (검색결과 3 건)
- 무료
- 기관 내 무료
- 유료
-
적외선 탐색기 신호처리를 위한 극저온 밴드갭 회로 동작 조건 제안 및 제작된 칩의 성능 분석
김연규,강상구,이희철,Kim Yon Kyu,Kang Sang-Gu,Lee Hee-Chul 대한전자공학회 2004 電子工學會論文誌-SD (Semiconductor and devices) Vol.41 No.12
적외선 소자로부터 생성되는 신호의 잡음 특성의 향상, 즉 좋은 영상을 얻기 위해서 적외선 영상신호 취득회로(ROIC)에서는 안정적인 기준 전압원이 필요하다. 본 논문은 극저온인 77K에서 동작하는 적외선 영상신호 취득회로(readout integrated circuit)를 위한 밴드갭 회로를 처음으로 제작한 후 측정, 평가하여 그 실용 가능성을 입증하고 있다. 밴드갭 회로는 대표적인 전압 기준회로로서 기존에 발표된 대부분의 밴드갭 회로는 실온에서 동작하는 것이며, 액체질소 온도 77K에서는 그 특성이 적합하지 않다. 본 논문에서는 극저온에서 동작하는 밴드갭 회로 설계를 위하여, 그에 맞는 회로를 선택하여 온도변화에 따른 사용되는 소자들의 파라미터에 대한 이론정립을 통한 그것의 특성을 살펴보고, 이러한 특성들을 고려하여 저온동작에 적합도록 하였다. 이 회로는 Hynix 0.6um standard CMOS 공정을 통해서 제작되었으며, 측정된 출력전압($V_{out}$)은 60K에서 110K까지 1.0396$\pm$0.0015V로서 기존의 실온에 동작하던 밴드갭 회로보다 더 높은 안정도를 보여주었다. A stable reference voltage generator is necessary to the infrared image signal readout circuit(ROIC) to improve noise characteristics of signal originated from infrared devices, that is, to gain good images. In this paper, bandgap circuit operating at cryogenic temperature of 77K for Infrared image ROIC(readout integrated circuit) was first made. It demonstrates practical use possibility through taking measurements and estimations. Bandgap circuit is a representative voltage reference circuit. Most of bandgap reference circuits which are presented so far operate at room temperature, and their characteristic are not suitable for infrared image ROIC operating at liquid nitrogen temperature, 77K. To design bandgap circuit operating at cryogenic temperature, suitable circuit is selected and the parameter characteristics of used devices as temperature change are seen by a theoretical study and fitted at liquid temperature with considering such characteristics. This circuit has been fabricated in the Hynix 0.6um standard CMOS process, and the output voltage measured shows that the stability is 1.042±0.0015V over the temperature range of 60K to 110K and is better than bandgap circuits operated at room temperature.
-
-
내독소 투여로 유도한 성인성 호흡곤란증에서 폐모세혈관압 및 혈역학의 변동
최규택,전재규,김연규,정정길 대한마취과학회 1992 Korean Journal of Anesthesiology Vol.25 No.3
Gram-negative sepsis is the most common setting in which the constellation of abnormalities in lung function, is clinically called the adult respiratory distress syndrome(ARDS). There is a considerable clinical interest in measuring pulmonary microvascular filtration pressure in patients with acute respiratory failure. Pulmonary capillary pressure(Pc) influences the rate of edema formation in the injured lung, and an understanding of how Pc is altered by the disease is important to improve our treatment of acute respiratory failure, We infuesd E. Coli endotox-in, 3 mg/kg, intravenously into anesthetized dogs and measured the hemodynamics and pulmonary capillary pressure, which was derived from the pressure transient recorded while the pulmonary artery catheter was rapidly wedged. Dogs were given fluids to restore cardiac filling pressure to baseline levels. This resulted in a low resistance shock in all animals. 3 hours after the endotxin infusion experimental ARDS developed. The data report that mean pulomanary artery pressure, pulmonary capillary pressure, and pulmonary vascular resistance(PVR) are increased in experimental ARDS(P$lt;0.1), and there is uneuqal, variable partitoning of the PVR. The Gaar estimation of Pc and measured Pc were highly correlated(r=0.915). These data suggest that measuring Pc will alow the clinician to learn if vasoactive agents infused in the management of acute respiratory failure can reduce the microvascular filtration pressure. In this manner, clinicians may directly reduce the rate of edema formation in the acutely injured lung.
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
