Contribution a la caracterisation et modelisation de transistors a effet de champ pour la conception des circuits integres monolithiques microondes

SIGLECNRS T Bordereau / INIST-CNRS - Institut de l'Information Scientifique et TechniqueFRFranc

Integrated-Transformer-Based Impedance Matching Method: Impedance Matching With Transformers

Impedance matching is a critical aspect of any RF or millimeter-wave (mm-wave) design. Although historically addressed with transmission lines or discrete elements, it can also be implemented with integrated transformers as their quality factors now reach decent values (approximately 10–20) at high frequencies (used at 77 GHz in this article) due to the thicker upper metal layers present in most integrated stacks

Baseband TIA Design Using Inversion Coefficient MOSFET Model in CMOS 28nm

This paper presents a design methodology to size a transimpedance amplifier for an automotive radar receiver. Based on the Enz-Krummenacher-Vittoz (EKV) MOSFET model, it presents the essential equations to develop a small-signal model featuring a limited number of parameters, which can be exploited to quickly explore the different design optimums of a circuit. Post-layout simulations are presented to validate the model and the methodology. The designed TIA presents a gain of 65 dBΩ, a bandwidth of 80 MHz, an input impedance of 74 Ω and input-referred noise of 50 yA2.Hz−1

Low incidence of SARS-CoV-2, risk factors of mortality and the course of illness in the French national cohort of dialysis patients

International audienceThe aim of this study was to estimate the incidence of COVID-19 disease in the French national population of dialysis patients, their course of illness and to identify the risk factors associated with mortality. Our study included all patients on dialysis recorded in the French REIN Registry in April 2020. Clinical characteristics at last follow-up and the evolution of COVID-19 illness severity over time were recorded for diagnosed cases (either suspicious clinical symptoms, characteristic signs on the chest scan or a positive reverse transcription polymerase chain reaction) for SARS-CoV-2. A total of 1,621 infected patients were reported on the REIN registry from March 16th, 2020 to May 4th, 2020. Of these, 344 died. The prevalence of COVID-19 patients varied from less than 1% to 10% between regions. The probability of being a case was higher in males, patients with diabetes, those in need of assistance for transfer or treated at a self-care unit. Dialysis at home was associated with a lower probability of being infected as was being a smoker, a former smoker, having an active malignancy, or peripheral vascular disease. Mortality in diagnosed cases (21%) was associated with the same causes as in the general population. Higher age, hypoalbuminemia and the presence of an ischemic heart disease were statistically independently associated with a higher risk of death. Being treated at a selfcare unit was associated with a lower risk. Thus, our study showed a relatively low frequency of COVID-19 among dialysis patients contrary to what might have been assumed