http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
65nm CMOS공정을 이용한 FMCW 레이더 및 라디오미터 일체형 센서용 광대역 IF 가변 이득 증폭기
남효현(Hyohyun Nam),김형규(Hyeong-Kyu Kim),김당오(Dang-Oh Kim),류현준(Hyun-Jun Ryu),김주혜(Ju-Hye Kim),박정동(Jung-Dong Park) 대한전자공학회 2018 전자공학회논문지 Vol.55 No.10
본 논문은 FMCW (Frequency-modulated continuous-wave) 레이더 및 레디오미터 센서가 결합된 수신 전단부용 IF 증폭기로 이용할 수 있는 광대역 가변 이득 증폭기 (VGA)를 65nm CMOS 공정을 이용하여 구현한 내용을 다룬다. 구현된 광대역 IF 가변 이득 증폭기는 통합된 64 비트 SPI scan-chain에 의해 제어된다. 구현된 가변 증폭기의 측정된 최대이득은 31.4dB, 가변이득범위는 4.5 dB ~ 31.4 dB, 3-dB 대역폭은 약 2 GHz 이고, 입력단 1dB 이득 압축점 (P1dB)은 -38.81 dBm이다. 본 가변 증폭기는 1.2 V의 전원에서 14.1 mA의 전류를 소모한다. 또한, 가변 이득 증폭기를 구성하는 가변이득단 및 컨트롤 회로, DC 오프셋제거기 및 공통되먹임(CMFB)회로, 출력 버퍼 등, 핵심블록이 차지하고 있는 칩면적은 410 μm × 336 μm이다. In this paper, we present a variable gain amplifier (VGA) that can be used as an IF amplifier block for a combined frequency-modulated continuous-wave (FMCW) radar and radiometer sensor in 65nm CMOS technology. The implemented wideband IF VGA is controlled by an integrated 64-bit SPI scan chain. The fabricated VGA shows the maximum gain of 31.4 dB, the variable gain range of 4.5 dB to 31.4 dB, the 3-dB bandwidth of 2 GHz and the input 1dB gain compression point (P1dB) of -38.81 dBm. The chip consumes 14.1 mA of current at 1.2 V and the chip area occupied by the variable gain stage and its control circuit, DC offset canceller and common-mode feedback (CMFB) circuit, and the output buffer is 410 μm × 336 μm.
김선철 ( Sun Chul Kim ),차진주 ( Jin Joo Cha ),오세원 ( Se Won Oh ),권오성 ( Oh Sung Kwon ),강영선 ( Young Sun Kang ),김형규 ( Hyeong Kyu Kim ),차대룡 ( Dae Ryong Cha ) 대한신장학회 2009 Kidney Research and Clinical Practice Vol.28 No.4
A renal infarct is too rare a disease for early diagnosis and treatment. Furthermore, it presents nonspecific symptoms in many patients. Cardiac diseases such as valvular heart disease and arterial fibrillation are the most common causes of renal infarct. Vascular disease such as renal artery dissection or aortic dissection, trauma, inflammation, vasculitis, malignancy and antiphospholipid syndrome have been also known as possible causes of renal infarct. In acute pancreatitis, adjacent vessels can be involved, and were reported to induce splenic infarction, portal vein thrombosis and superior mesenteric vein thrombosis etc. However, the renal infarct from renal artery involvement in acute pancreatitis has not yet been reported. In our case, a 46 year old male patient had an abdominal trauma due to an in-car accident to develop a rupture of pancreatic tail. The progression of acute pancreatitis caused the inflammation of left renal artery, leading to renal artery obstruction. We report a case of renal infarct developed in acute pancreatitis.
지속적 외래 복막투석 환자에서의 복합균 복막염시 도관제거에 대한 연구
권영주,이영기,차대룡,김상욱,신진호,조원용,표희정,김형규 대한신장학회 1998 Kidney Research and Clinical Practice Vol.17 No.4
Polymicrobial peritonitis is a relatively uncommon complication and it's clinical characteristics, risk factor and optimal managernent remain controversial. To identify indications for catheter removal in polymicrobial peritonitis, we reviewed the 340 episodes that occured in 168 patients of CAPD peritonitis during past 7 years to identify those. Polymicribial peritonitis was the 18 epoisodes in 18 patients of all peritonitis. First, 18 patients with polymicrobial peritonitis(P-P) did not show significant differences in the demographic features com- pared to 130 patients with single organism peritonitis (S-P). In contrast to Staphylococcus in S-P, the most common causative organisrn in P-P was pseudomonas(23%). Also sgnificantly more catheters were removed in P-P than S-P(P=0.001). Second, we cornpared group I, the patients responded to antibiotics only, and group II, those who needed catheter removal. The group I was 7(39%) and the group II was 11(61%). No patient of group I died and two patients of group II died. Between group I and group II, there were no significant differences in the demographic features. However, patients whose dialysate-WBC counts were below 100 at 3rd day after start of antibiotics were more significantly frequent in group I than group II. Among combination of causative organisms in P-P, most of Pseudornonas(6/9) and fungus(4/4) were treated by catheter removal. In conclusion, more catheters were removed in P-P than S-P. When dialysate WBC at 3rd day after start of antibiotics were over 100 and causative organism included pseudomonas or fungus in P-P, catheter removal was needed. We suggest that the kinds of organisms isolated and early response to antibiotics influence on the outcome of polymicrobial peritonitis.