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International Conference on Actual Problems of Electronic Instrument Engineering (APEIE)

作者： Alexandr E. Shesterikov Darya A. Shesterikova Evgeniy V. Erofeev Development Department of NPC "Microelectronics" AO «NPF «Micran» Tomsk State University of Control Systems and Radioelectronics 634050 Tomsk Russia Tomsk Russian Federation Institute of Atmospheric Optics V.E. Zuev SB RAS 634055 Tomsk Russia Tomsk Russian Federation

The paper presents an approach to the selection of the optimal heterostructure to ensure the specified parameters of HEMT. The parameters of four heterostructures with different parameters were analyzed in the framework of the study. Test transistor elements were fabricated on each of the heterostructures using 0.15 μm pHEMT process technology. The following parameters were measured: drain current per unit channel length at gate voltage equal to zero; maximum drain current per unit channel length; transistor cutoff voltage at drain current equal to 1 mA/mm; maximum transistor steepness value. As a result of analyzing the obtained data, a structure with carrier mobility in the channel of 5005 cm2/(V-s) and σ-doping concentration in AlGaAs of 1,31•10 12 cm -2 was selected. Also, a related task was to determine the optimal etching time of the gate recess. As a result of the analysis, the optimal etching time was 1.5 min. At this etching time, the greatest coincidence of transistor characteristics with the required values is ensured.

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Sallen-Key Dual Channel Low-Pass Filter with Tunable Cutoff Frequency

Sallen-Key Dual Channel Low-Pass Filter with Tunable Cutoff ...

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IEEE Region 8 International Conference on Computational Technologies in Electrical and Electronics Engineering, SIBIRCON

作者： Darya Yu. Denisenko Nikolay N. Prokopenko Nikolay V. Butyrlagin Dept. of Information Systems and Radio Engineering DTSU Dept. of Automatic Control Systems SFU Rostov-on-Don Russia Dept. of Information Systems and Radio Engineering DTSU Institute for Design Problems in Microelectronics of RAS Rostov-on-Don Zelenograd Russia Dept. of Information Systems and Radio Engineering DTSU Rostov-on-Don Russia

ISBN: (纸本)9781665464819

A two-channel Sallen-Key low-pass filter on three non-inverting amplifiers is studied, which has the property of unrelated digital set of the upper cut-off frequency at constant index of the transmission coefficient in the bandwidth range. The restructuring of the upper cutoff frequency and the attenuation of the pole is carried out by modify the resistors’ resistance of one in the upper channel of the low-pass filter. It is shown that a non-inverting amplifier in the lower channel of the low-pass filter can have a small value of the systematic zero bias voltage component, what is important for the operation of the low-pass filter at the input of analog-to-digital converters. It has been established that due to the construction of a low-pass filter according to a two-channel architecture, the requirement for the magnitude of the output static voltage of the upper channel is removed. The base equations of the new low-pass filter scheme are given and the summary modeling in the Micro-Cap was pictured.

关键词： Resistance Operational amplifiers Time-frequency analysis Systematics Cutoff frequency Capacitors Low-pass filters

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Estimating the AGV load and a battery lifetime based on the current measurement and random forest application

Estimating the AGV load and a battery lifetime based on the ...

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IEEE International Conference on Big Data

作者： Krzysztof Hanzel Damian Grzechca Adam Ziebinski Lukas Chruszczyk Artur Janus Department of Telecommunications and Teleinformatics Faculty of Automatic Control Electronics and Computer Science Silesian University of Technology Gliwice Poland Department of Electronics Electrical Engineering and Microelectronics Faculty of Automatic Control Electronics and Computer Science Silesian University of Technology Gliwice Poland Department of Distributed Systems and Informatics Devices Faculty of Automatic Control Electronics and Computer Science Silesian University of Technology Gliwice Poland Student of Electrical Engineering Faculty of Electrical Engineering Silesian University of Technology Gliwice Poland

The paper describes the energy consumption from the battery based on the current measurements for various cases, i.e., speed (PWL adjustment) and loads. The main purpose of the research is to have additional and reliable information about power consumption and battery life estimation for autonomous guided vehicles (AGV). The authors propose a two-step algorithm. In the first step, a linear classifier was proposed. Then, the KNN classifier was tested; however, it did not give satisfactory results, so it was finally decided to use the random forest to estimate the load and PWL. The time domain current measurement is evaluated, and the beforementioned algorithms process the selected statistical measures. It has been proven that a two-step algorithm allows for achieving high accuracy. Based on the current observation, the paper is a good starting point for further investigation of the AGV because it is usually implemented in the AGV – so it does not require additional hardware. Moreover, it can lead to better energy management and increase battery lifetime.

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Aluminum Nitride Ring Resonator-Coupled Spin Defects in Hexagonal Boron Nitride for Integrated Quantum Photonics

Aluminum Nitride Ring Resonator-Coupled Spin Defects in Hexa...

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Conference on Lasers and Electro-Optics (CLEO)

作者： Henry C. Roberts Aadil Waseem Scott A. Wicker Hamza Abudayyeh Dong Seob Kim Zhida Liu Steven Randolph Xiaoqin Li Xiuling Li Department of Electrical and Computer Engineering Microelectronics Research Center The University of Texas at Austin Austin TX USA Department of Physics and Center for Complex Quantum Systems Center for Dynamics and Control of Materials and Texas Materials Institute The University of Texas at Austin Austin TX USA Center for Nanophase Materials Sciences Oak Ridge National Laboratory Oak Ridge TN USA

We report a new approach to generate waveguide-coupled emission from deterministically implanted boron vacancy spin defects in hBN using single-crystal AlN-on-sapphire ring resonators. This facilitates the eventual de... 详细信息

ISBN: (纸本)9798350369311

关键词： Boron Waveguide lasers Ring lasers Optical ring resonators Electro-optical waveguides Photonics Aluminum nitride

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Testing of Ethernet Function of Domestically-made FPGA Chip and Acquisition Board for the Application of Protective Relaying

Testing of Ethernet Function of Domestically-made FPGA Chip ...

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2021 International Conference on Power System Technology, POWERCON 2021

作者： Wang, Bin He, Xiaocai Jiang, Yingjie Lv, Xinquan Zhou, Zhimei Feng, Chen Dong, Xinzhou Tsinghua University Key Laboratory of Control and Simulation of Power Systems and Generation Equipment Department of Electric Engineering Beijing China Communication Transmission Center Information Telecommunications Company State Grid Shandong Electeic Power Company Jinan China Chip Design Center Beijing Smartchip Microelectronics Technology CO. Ltd Beijing China Smart Shine Microelectronics Technology CO. Ltd Chip Product Department Beijing China

ISBN: (纸本)9781665407373

In order to solve the problem that the core chips of domestic protective relaying devices generally rely on foreign imported chips and realize the localized replacement of FPGAs, this paper designs the verification peripheral circuits of domestic FPGA chip through the analysis of the structure and test schemes design of domestic FPGA, including board-level verification scheme and data flow control verification scheme. The communication test and random test are carried out to the IP core of domestic FPGA MAC controller. From the test results, it can be seen that the loopback data and the transmitted data in the descriptor are consistent, and the tested domestic FPGA can be competent for its role in the application of protective relaying. © 2021 IEEE.

关键词： Field programmable gate arrays (FPGA)

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controllable RLC High-Frequency Filter with Resistive Tuning of Key Parameters

Controllable RLC High-Frequency Filter with Resistive Tuning...

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IEEE Region 8 International Conference on Computational Technologies in Electrical and Electronics Engineering, SIBIRCON

作者： Darya Denisenko Nikolay Prokopenko Ilya Pakhomov Yuriy Ivanov Automatic Control Systems South Federal University Don State Technical University Rostov-on-Don Russia Information Systems and Radio Engineering Don State Technical University Federal State-Funded Institution of Science Institute for Design Problems in Microelectronics of Russian Academy of Sciences Rostov-on-Don Zelenograd Russia Instrumentation and Biomedical Engineering Don State Technical University Rostov-on-Don Russia Automatic Control Systems South Federal University Rostov-on-Don Russia

ISBN: (纸本)9781665464819

A new RLC high-pass filter circuit is considered, in which, due to the introduction of additional buffer amplifiers (voltage followers) and resistive voltage dividers, independent tuning of the pole Q-factor and the pole frequency by various resistance is realized at constant capacitance values of the frequency-setting capacitor and frequency-setting inductance. The article discusses the conclusion of modeling RLC high-pass filter in the Micro-Cap, which confirm its claimed properties. The basic mathematical equations for the transfer function of the RLC high-pass filter and the parameters of its frequency response are obtained. The equations obtained above make it possible to develop an algorithm for independent adjustment of the parameters of the proposed RLC filter. The RLC high-pass filter circuitry proposed by the authors is recommended for adaptive filtering of signals in radio engineering and measuring systems. Due to the appropriate parameters choice of passive and active circuit elements, it is possible to ensure the operation of the considered RLC high-pass filter both at low and at high frequencies.

关键词： Resistance Adaptive systems RLC circuits Transfer functions Filtering algorithms Information filters Frequency conversion

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Simple Algorithm of Antenna Array Calibration

Simple Algorithm of Antenna Array Calibration

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Siberian Conference on control and Communications (SIBCON)

作者： Vladislav Kurganov Victor Djigan Institute of Microdevices and Control Systems National Research University of Electronic Technology (MIET) Moscow Russia Institute for Design Problems in Microelectronics of RAS Moscow Russia

ISBN: (纸本)9781728185040;9781728185057

This paper presents a simple algorithm for the calibration of antenna arrays. It belongs to the phase-less algorithms family, because it does not require the expensive phase measurement equipment. The estimation and compensation of the complex-valued gains of the array channels, caused by non-identical characteristics of these channels, is the aim of a calibration task. For the estimation, the considered calibration algorithm uses only three measurements of the array output power under 0°, 90° and 270° phase shifter states in each channel. The algorithm explanation and the main steps of the algorithm development, based on the geometrical representation of the antenna array signals, are presented. The algorithm efficiency is proved via simulation.

关键词： Phased arrays Phase measurement Power measurement Phase shifters Channel estimation Estimation Calibration

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Tunable Magnetic Anisotropy, Half-Metallicity and Tunneling Magnetoresistance Effect of 2d Cri3 in Cri3/Mngex3 (X= Se, Te) Heterostructures Under Normal Compressive Strain

SSRN

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SSRN 2022年

作者： Song, Yanxing Chai, Changchun Fan, Qingyang Zhang, Wei Yang, Yintang State Key Discipline Laboratory of Wide BandGap Semiconductor Technology School of Microelectronics Xidian University Xi'An China School of Information and Control Engineering Xi’an University of Architecture and Technology Xi'An China Beijing Institute of Astronautical Systems Engineering Beijing China

The induction of half-metallicity and tunable magnetic anisotropy of CrI3 monolayers remains challenging and unstable. In this study, we demonstrate that half-metallic CrI3 can be induced in a CrI3/MnGeX3(X = Se, Te) heterostructure by interlayer charge transfer. Normal compressive (NC) strain can effectively control the half-metallic band gap, magnetic anisotropy and spin-polarized electronic transport of CrI3 in CrI3/MnGeSe3. At 6% strain, the easy magnetization axis of CrI3 changes from out-of-plane to in-plane, and the half-metallic band gap increases by 20%. The results of band structure, force theorem, charge density and work function calculations show that CrI3 in CrI3/MnGeSe3 loses electrons to form a hole-conducting half-metal, while CrI3 gains electrons in CrI3/MnGeTe3 to form an electron-conducting half-metal. Heterointerfacial half-metallicity in CrI3 is intrinsic without any external physical modification, and the NC strain of a two-dimensional structure can easily be realized experimentally, paving the way for further research of spintronic devices. © 2022, The Authors. All rights reserved.

关键词： Magnetic anisotropy

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Antenna Arrays Calibration Using Recursive Least Squares Adaptive Filtering Algorithms Based on Inverse QR Decomposition

Antenna Arrays Calibration Using Recursive Least Squares Ada...

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2020 IEEE East-West Design and Test Symposium, EWDTS 2020

作者： Djigan, Victor Kurganov, Vladislav Institute for Design Problems in Microelectronics of Ras Department of Integrated Circuits Design Methodology Moscow Russia Institute of Microdevices and Control Systems National Research University of Electronic Technology Moscow Russia

ISBN: (纸本)9781728198996

This paper considers the antenna arrays calibration by the using of the Recursive Least Squares (RLS) adaptive filtering algorithms. An algorithm, based on the inverse QR decomposition, has been selected among the diversity of the RLS algorithms. This is caused by its stable operation. Because the algorithm contains the computationally heavy square root operations, a square root free version of the algorithm is also presented. Both versions of the QR RLS algorithms are mathematically identical to each other if they operate in float point arithmetic. The proposed calibration can be used in the antenna arrays with digital beamforming, because the algorithms usage requires the access to the array channel signals. The calibration requires a known training signal, which can be easily provided not only in a laboratory environment, but also in a field operation, if an array is used as a directional antenna of the digital communication system equipment. In the second case, the calibration can be also conducted even in the presence of the interference signal sources. Simulation validates the proposed calibration algorithm, using linear antenna arrays with 4, 8 and 16 antennas with a half wavelength distance between the neighbor antennas. In this simulation, the array channel noise has been varied in 0.. 30 dB range of the Signal-to-Noise Ratio. Two interference sources with the-30 dB Signal-to-Interference Ratio each have been simulated. These sources were located symmetrically relatively the required main lobe direction of the array radiation pattern. A training signal has been simulated as a random one with no specific autocorrelation properties. The signal has been modulated by the Phase Shift Keying (PSK) and the Quadrature Amplitude Modulation. © 2020 IEEE.

关键词： Beamforming

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Least Squares Criterion Adaptive Filtering Algorithms as Tools for Calibration of Arrays with Digital Beamforming

Least Squares Criterion Adaptive Filtering Algorithms as Too...

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2020 IEEE Ukrainian Microwave Week, UkrMW 2020

ISBN: (纸本)9781728173139

This paper explores the application of the adaptive filtering algorithms, based on Least Squares (LS) criterion for the calibration of the receiving arrays with digital beamforming. The digital beamforming assumes the access to the signals in the array channels as a requirement, which has to be provided if the adaptive signal processing is used. In this case, the adaptive filtering algorithms, based on the minimization of the LS error between the desired and array output signals, are able to estimate the channel parameter spread, which values can be stored and used for correction of the array weights during the beam steering. If a set of steered beam positions is known, for example in scanning arrays, the proposed algorithm allows to create a codebook of the array weights, which ensures the random variation of channel's parameters compensation and correct beam steering. The architecture of the proposed solution and mathematical description of a Recursive Least Squares (RLS) adaptive filtering algorithm, on which the calibration is based on, are presented. The algorithm uses a dynamic regularization of the array input signal correlation matrix. No specific correlation properties are required for the algorithm training signal. The simulation results demonstrate the ability of the calibration algorithm to compensate the channel's parameters spread. If the array channel Signal-to-Noise Ratio (SNR) is 0... 30 dB, then the achieved spread of the calibrated channels gain errors is about -20 dB. The norm of the ideal and calibrated array difference is also about -20 dB. The results are obtained with the Phase Shift Keying (PSK) and Quadrature Amplitude Modulated (QAM) training signals. The ability of the proposed calibration algorithm to operate in interference conditions is also demonstrated © 2020 IEEE.

关键词： Beamforming

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