Dependences of LM 111 voltage comparator input current on time during post-radiation annealing are investigated. The technique based on the Gummel- Poon model of a bipolar transistor for numerical simulation of the annealing process, taking into account the temperature drift of the radiation-sensitive parameter is presented.

A possible influence of location of the effective Fermi level in the forbidden gap of the surface base region on dose rate sensitivity of bipolar integrated circuits was described. Also, it is shown, that the position of the effective Fermi level leads to different behavior of bipolar devices during post-irradiation annealing at enhanced temperature. Experimental tests on dose rate sensitive devices were provided and discussed.

The review considers the design of ion mobility spectrometers, which allow for the conditionally simultaneous detection of both positive and negative ions. The review of existing serial ion mobility spectrometers with simultaneous detection of substances in both spectrometric modes is carried out. The ways of realization of the bipolar ion mobility spectrometer are analyzed.

Modification of the ELDRS (Enhanced Low Dose Rate Sensitivity) conversion model is presented. The effect of the oxide trapped charge on the value of the oxide electric field and the yield of the oxide charge takes into account. It leads to dependence of the accumulation of radiation-induced oxide charge and interface traps on the dose rate. In enhancement version the ELDRS conversion model describes the low dose rate effect as “true” dose rate effect.

Real time dependence of operation temperature, which is typical for space environment, was taken into account in the numerical simulation of radiation degradation of LM111 bipolar voltage comparator input current. The technique and results of performed numerical analyses are presented and discussed.

New algorithms were developed to control the drift region heaters and the gas pumps of ion mobility spectrometer. The efficiency of substances detection was increased. Control algorithm block heaters can improve the accuracy of temperature stabilization in terms of the significant events of the time constants of thermal circuits and high heat capacity elements of the drift region. The improved control algorithm of a block of gas pumps minimizes the duration of the transition process when changing the predetermined level of the engine speed over a wide range. The study and optimization of control algorithms for heaters of the drift region and the gas pump ion mobility spectrometry.

Heart failure (HF) affects almost all organs and systems, including general and local pulmonary metabolism, thus effecting on volatile organic compounds concentration in expired air. The aim of the present study is to evaluate the value of expired air analysis (proton mass spectrometry, PTR-MS) for the diagnosis of HF. The study population included 19 patients with stable chronic New York Heart Association (NYHA) functional classification class 2-3 and 16 sex and age matched controls without signs and symptoms of HF. Expired air analysis could provide facilities of early diagnosis and monitoring in HF patients. Most patients had ischemic aetiology of HF, and 31% of them had NYHA class 2 and 69% NYHA class 3 symptoms. Fasted expired air collected by special Tedlar bags was analysed by Compact PTR-MS. The composition of expired air was analysed by deviation of the content of certain substances against their concentration in neutral air. Analysis of samples from patients reveals 24 substances that differ in concentration from the neutral air. Six of them differ significantly in patients with and without HF. Namely, the concentrations of acetone, formaldehyde, propylene, acetic acid, xylene and benzoates were significantly elevated in HF patients (p > 0.05).

Radiation degradation rate of base current in SiGe HBTs was experimentally investigated using X-ray irradiation source with Cu anode at room and low temperatures. The dependences of base and collector current on the emitter-base voltage of the transistors were measured during radiation impact and presented for different total dose levels and irradiation conditions.

На основе учета зарядового состояния радиационно-индуцированных поверхностных ловушек, положения эффективного уровня Ферми, определяющего сечение захвата ловушек, и данных о накоплении объемного заряда и поверхностных состояний проведен расчет тока поверхностной рекомбинации в биполярных транзисторах при накоплении полной дозы ионизирующего излучения. The calculation of the surface recombination current in bipolar transistors during the accumulation of the total dose of ionizing radiation is carried out based on consideration of the charge state of radiation-induced interface traps, the position of the effective Fermi level determining the trap capture cross-section, and data of the accumulation of the volume charge and interface states

Exhaled breath analysis is a novel tool for diagnostics of different diseases. Taking into account the secretory function of the lungs, the composition of exhaled breath is different in physiological and pathological conditions. In this review we consider of some substances which content vary in cardiovascular diseases - pentane, isoprene, carbon monoxide and trimethylamine. Modern technologies allow to move the analysis of exhaled breath from research laboratories into clinical practice. Thus, a new tool for real time of screening various cardiovascular diseases has appeared in the arsenal of physicians.

We investigated the radiation sensitivity of dose-metrical sensors based on n-channel MOSFETs taking into account the effects of temperature and electrical modes. There were measured the output voltages V being equal to the gate voltage VG of MOSFET-based dosimeter as function of the radiation doses at const values of the drain current ID and the drain—source voltage VD (conversion functions), as well as the (ID − VG) characteristics before, during and after irradiations at different temperatures. It was shown how the conversion functions and the radiation sensitivities are depending on the temperature and electrical modes. It is found that the conversion functions V(D) have two characteristic regions for low and high doses (with negative and with positive radiation sensitivities). To interpret experimental data there were proposed the models of conversion function and its components taking into account the separate contributions of charges in the dielectric and in SiO2–Si interface.

The application of the ELDRS conversion model for numerical simulation of the radiation degradation of input bias current in widely used voltage comparator is presented. The recurrence relations for numerical simulations were obtained and used calculations of the estimation of the radiation response of LM111 input bias current in real operation temperature conditions of TechEdSat satellite.

Physical mechanism of enhanced low dose rate sensitivity effect in bipolar devices is observed. It is shown, that the accumulation of the defects during low dose rate irradiation depends on the irradiation time only, while true dose rate effects contribution to enhanced low dose rate sensitivity effect is related with processes during post-irradiation annealing. The conversion model of low dose rate effect was used for numerical description of the radiation responses of input bias currents of bipolar operational amplifiers in wide range of dose rates.

BACKGROUND:Exhaled breath analysis is one of directions in the search for novel biomarkers of chronic heart failure (CHF). According.

First International Telecommunication Conference on Advanced Micro- and Nanoelectronic Systems and Technologies took place from December 22nd to December 23rd 2015 at National Research Nuclear University MEPhI (Moscow Engineering Physics Institute). It was organized by the Micro- and Nanoelectronic Department of National Research Nuclear University MEPhI (the oldest Microelectronic department in Russia (USSR).

This paper is about embedding of the mathematical methods and development of the software for automatic modeling of IMS spectra. This goal is urgent for IMS analysis of marker substances in human breath for disease diagnosis. The presented method based on the well-known physical model of IMS spectra that is well described IMS spectra using a set of Gauss functions. This paper present next points : 1) Development of the methods for automatic search and identification of Gauss peaks in IMS spectrum. 2) Development of the methods for determining of parameters for Gauss peaks model.