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In this work self-heating effect in SOI MOSFETs with various configuration of buried oxide was investigated using TCAD modeling. The basically electro-thermal transport model built-in to Sentaurus Synopsys tool was complemented by the set of new models for the temperature-dependent physical parameters: thermal conductivities λSi(T), λSiO2(T); oxide and trapped charge densities Nox(T), Nit(T) and others taking into account the special thermal effects that appear in modern deep submicron and nano-scale devices.
Abstract—We have performed computer simulations and experimental studies of characteristics of a standard analog device—the heterodyne employing a printed circuit board (PCB) made from a composite dielectric with a controlled dark conductivity. Simulation results show that an increased conductivity of the PCB smaller than 2 × 10^−7 Ohm^−1 · m^−1 has almost no effect on the operating characteristics of a heterodyne operating in the frequency range of 9–37 MHz, which are in a good agreement with the experimental data. Such PCBs are expected to exclude electrostatic discharges in spacecraft electronic devices otherwise occurring in them due to their internal charging by the ambient space plasma.
The primary purpose of this paper is to provide an overview of existing education solutions for IoT and develop proposals for their improvement. The study draws analysis of current conditions of the educational IoT sphere, a comparative analysis of educational products used for teaching of undergraduate students. With that the article describes the architecture of our own software and hardware platform for learning IOT. Moreover, this paper reviews methods and technical instruments employed to design software and hardware appliances.
This article describes a technical solution of the system generator of configuration files of development boards “Marsohod 2”, “Marsohod 2bis”, “Marsohod 3”, “Marsohod 3bis” for Quartus Prime software. The solution includes a web interface for the system generator, generation of configuration files, introduction of additional modules into the generated project, such as a frequency divider, Uart8 (RS-232), a module for preventing of contact bounce, and several types of simplest MIPS processor cores. This technical solution improves the convenience and speed of FPGA development, as well as reduces its entry threshold which can be significant for starting developers.
This work is devoted to the study of communication subsystem of networks-on-chip (NoCs) development with an emphasis on their topologies. The main characteristics of NoC topologies and the routing problem in NoCs with various topologies are considered. It is proposed to use two‑dimensional circulant topologies for NoC design, since they have significantly better characteristics than most common mesh and torus topologies, and, in contrast to many other approaches to improving topologies, have a regular structure. The emphasis is on using ring circulants which although in some cases have somewhat worse characteristics than the optimal circulants, compensate by one-length first generatrix in such graphs that greatly facilitate routing in them. The paper considers three different approaches to routing in NoCs with ring circulant topology: Table routing, Clockwise routing, and Adaptive routing. The algorithms of routing are proposed, the results of synthesis of routers, based on them, are presented, and the cost of chip resources for the implementation of such communication subsystems in NoCs is estimated.
The most competitive in the current global market remains products of extractive industries, which determines the increased attention to the problems of functioning of these industries and clarify the terms of their most sustainable development. Unique mineral-raw material complex of Russia can ensure the continued economic development of the state only on condition of effective activity of the largest mining enterprises. Important to adaptation of enterprises to the changing external environment that places new demands on planning, on the basis of the calculated predictive values, and creates the possibility of increasing the competitiveness of the organization. Integrated quality management system in the modern world represent the most important area of functioning and development of any production, great extent determine the competitiveness of the enterprise and prospects of its activities. The need for effective construction of a system of methods, tools, principles and tools of collection, analysis, evaluation, presentation and use of data evaluating the effectiveness and stability of functioning and directions of improving the organization of mining enterprise on the basis of the technical, economic, social and environmental issues in the framework of the technical and economic audit.
Constant growth of spacecraft operating life requirements leads to creating equipment which fits these requirements. From this point of view, specifically durability prediction allows to evaluate the potential of creating equipment with a long operating life. On early stages of equipment’s development analytical methods of durability prediction are used. Obviously, the more precise the estimation is, the more likely that the practical test will confirm the durability predictions. Therefore, improving the engineering techniques of the durability prediction is a relevant problem.
The objective of this research is to improve the quality of design work by enhancing the engineering techniques of the durability prediction, which raise the authenticity of the evaluations.
Life of the equipment are calculated using the statistical modelling method (Monte-Carlo method). This method takes into consideration probabilistic characteristics of constituent elements’ life.
As a result, the problem of predicting operating life of electronic equipment using the reference data on early stages of development is solved. An analysis of standardized method of durability prediction was performed which revealed existing limitations for using this method when predicting operating life of electronic equipment. An alternate, statistical method of predicting operating life of electronic equipment was suggested and a software implementation was created. Developed software was tested and verified. Analytical experiments were performed to show the authenticity of the suggested method and to compare it to the standardized one.
Thus, results of the performed research show that the standardized method is applicable only for calculating the minimum operating time. Also, it was concluded that the truncation parameter of element’s life distribution, variation coefficient of life and some specific qualities of dependability prediction scheme have to be taken into consideration when predicting durability of electronic equipment.
New SOS MOSFET design with the presence of high-resistance undoped silicon of intrinsic conductivity in the channel
region near the source was proposed. 0.75 μm SOS MOSFET with the use of an "insertion" makes it possible to obtain
the transistor with characteristics corresponding to a transistor with 0.5 μm topological channel length. This allows the
factories to produce new competitive products without significant capital expenditures for the modernization of
Quasi-3D model for calculation of radiation leakage currents in modern submicron SOI MOSFET structures is proposed. Instead of the fully 3D modeling is proposed to solve two tasks: 2D modeling of the traditional MOSFET cross-section and 3D modeling of the side parasitic transistor. The radiation-induced leakage current simulation in the 0.35 μm SOI MOSFET structure with taking account ionizing radiation with a dose of up to 500 krad was simulated. The results of the simulation show that in comparison with the traditional fully 3D modeling, which requires 11 hours of computer time, the computer time for the IdVg characteristic was reduced to 71 minutes (i.e. the computer time decreased by 9 times).
A special RAD-THERM version of TCAD subsystem based on Sentaurus Synopsys platform taking into account different types of irradiation (gamma-rays, neutrons, electrons, protons, single events) and external/internal heating effects was developed and validated to forecast the results of natural experiments, and help the designer on with reliability guarantee. The radiation- and temperature-induced faults were modeled and simulated for Si/SiGe BJTs/HBTs and bulk/SOI MOSFETs as BiCMOS LSI’s components. The causes of device parameter degradation were discussed.
The development of multi-core processor systems is a demanded branch of science and technology. The appearance of processors with dozens and hundreds of cores poses to the developers the question of choosing the optimal topology capable to provide efficient routing in a network with a large number of nodes. In this paper, we consider the possibility of using multiplicative circulants as a topology for networks-on-chip. A specialized routing algorithm for networks with multiplicative circulant topology, taking into account topology features and having a high scalability, has been developed.
Abstract. The article considers the features of super-scalar processors, their way of performing several operations on several pairs of operands simultaneously. The research focuses on the organization of processor pipeline execution operation of several machine instructions in one processor core. The simulating kit was developed for better understanding of a processor core microarchitecture. It includes two parts: program and methodical recommendations with multiple task options. The simulating kit demonstrates the pipeline architecture consisting of two clusters: front-end and back-end and the principle of translating complex multi-cycle CISC-like instructions into simpler RISC-like micro-operations. The main types of machine instructions are considered: data transfer between registers and memory cells (four variations), data processing of couple of operands from registers and memory cells (four variations), conditional jump to the specified address. The program-simulator makes it possible to conduct a more detailed simulation of one of the three mechanisms for calculations accelerating in the processor core: multi-functional (super-scalar) processing, out-of-order processing, speculative instructions execution after the branch prediction. The simulating kit is used in educational process when training masters of Higher School of Economics National Research University.
The modern level of technological advance allows the use of CAD systems at all the stages of the electronic communication modules development, which allows the designers to discard the time-consuming process of manufacturing and testing an experimental prototype. To organize the interaction of various CADs the design techniques are used. The report discusses the integrated cross-cutting design technique implemented using National Instruments software products. Their advantages and disadvantages are evaluated. The use of the NI LabView made it possible to implement a dynamic calculation of reliability indicators through the use of NI LabView Multisim Connectivity Toolkit, which confirmed the possibility of realization an integrated cross-cutting design technique.
In this paper, research and development of a method for clustering social network users into groups is carried out, based on the description of the films.
The task is to sharply reduce the complexity of analysis, multivariate analysis and parametric optimization of linear and linearized equivalent electrical circuits. The source of such schemes are not only linear electronic circuits, but also circuits formed on the basis of artificial electrical analogies. They can be formed on the basis of finite element methods and finite difference methods used in solving partial differential equations. The reduction in the complexity of computations is carried out by formal methods of transforming the model into a macromodel, which reflects only the input - output type relations of the original model. The e ssence of the work lies in the formal transformation of the model of a linear or linearized equivalent electrical circuit, formed using artificial electrical analogies methods, into a macromodel, according to which the same output characteristics can be calculated with the same accuracy but with increased speed by several orders of magnitude. Algorithms for such transformations are given. Using a macromodel, one can calculate static characteristics, frequency characteristics, zeros and poles of system functions, dynamic characteristics, eigenvalues, and vectors of a macromodel matrix, which make it possible to determine the stability and stability margin of the original circuit using the first А.М. Lyapunov method, its resonant eigenfrequencies and the duration of the transition process, as well as partial derivatives of the above characteristics for a small number of variable circuit parameters to replace the optimization of the circuit with the methods of the 1st order with its optimization by the macro model. In addition, macromodels can be used to create a new element, constructional, and technological base for design. Macromodel can serve as an element of a model of a higher hierarchical level. Block hierarchical process of macromodelling is possible.