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High-Speed CBJT Operational Amplifier with Dual-Input-Stage Subclass Input Stage 3

High-Speed CBJT Operational Amplifier with Dual-Input-Stage ...

引用

3rd IEEE International Conference on Problems of Informatics, Electronics and Radio engineering, PIERE 2024

作者： Kuznetsov, Dmitry V. Titov, Alexey E. Sergeenko, Marsel A. Prokopenko, Nikolay N. Don State Technical University Dept. of Scientific Research Dept. of Information Systems and Radio Engineering Rostov-on-Don Russia Southern Federal University Dept. of Automatic Control Systems Rostov-on-Don Russia Don State Technical University Dept. of Information Systems and Radio Engineering Rostov-on-Don Russia

ISBN: (纸本)9798331516321

A significant disadvantage of classical operational amplifiers with two complementary differential stages in parallel (on the inputs) is that here the slew rate has small values (50-80 V/μs). This is due to the non-linear mode of operation of the input differential stage. In this paper, a new circuit technique for slew rate enhancement in CBJT operational amplifiers of this subclass is discussed. Due to the use of special circuitry of the input differential stage, the process of recharging of the integrating correction capacitance in non-inverting and inverting operational amplifier inclusions is forced. This ultimately improves the performance of the operational amplifier in the large-signal mode. The purpose and originality of this paper is to investigate a new circuit solution of operational amplifier, in which by introducing differentiating transient correction circuits, slew rate is improved by two orders of magnitude. This does not require nanometer-scale technological processes, and the operational amplifier transistors can operate with emitter currents on the order of 100 μA. It is possible to build micro-power operational amplifier on the basis of the proposed circuit design technique, including CBJT and CCMOS transistors. Computer simulations show that for micron CBJT silicon technological processes, the SR of the proposed operational amplifier in non-inverting inclusion (at 100% feedback) increases from 80 to 10000 V/μs, i.e., more than two orders of magnitude. © 2024 IEEE.

关键词： Operational amplifiers

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Method for Improving the Performance of Operational Amplifier with HA2700 Microchip Architecture

Method for Improving the Performance of Operational Amplifie...

引用

2024 International Conference on Electrical engineering and Photonics, EExPolytech 2024

ISBN: (纸本)9798350388879

A circuit technique for increasing the maximum output voltage slew rate (SR) of an integrated operational amplifier (OpAmp) with the HA2700 microchip architecture based on the modernization of the input differential stage (DS) is considered. An OpAmp architecture is proposed in which the influence of parasitic capacitances of DS reference current sources and capacitances on the transistor substrate on the SR is minimized. This allows the use of micron technological processes in the fabrication of CBJT OpAmps, which are widely used to improve the radiation resistance of microchips. Computer simulation of the proposed OpAmp is performed, which shows that the SR of the new circuit differs from the SR of the well-known serial OpAmp by more than 40 times and reaches values of about 800 V/μs at the emitter current of the input transistors of the DC in the range of up to 80-100 μA. The developed OpAmp is recommended for practical use in discrete-to-analog filters on switched capacitors. © 2024 IEEE.

关键词： Operational amplifiers

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From Model Predictive control to Data Driven control to Meet High Efficiency Objective of a PMSM Drive system 16

From Model Predictive Control to Data Driven Control to Meet...

引用

16th International Conference on Applied and Theoretical Electricity, ICATE 2024

作者： Costin, Madalin Bivol, Ion 'Dunarea de Jos' University of Galati Dept. of Electrical Engineering and Energy Conversion Systems Galati Romania Gheorghe Asachi Technical University of Iasi Dept. of Automatic Control and Applied Informatics Iasi Romania

ISBN: (纸本)9798350388107

In this paper is proposed a Data Driven control (DDC) law of a Permanent Magnet Synchronous Machine (PMSM) drive as an alternative to the Model Predictive control (MPC) strategy. The DDC method is designed for the inner control structure of the PMSM drive, the outer speed loop being employed by a classical linear PI controller. Thus, the DDC is based on build up a database of the relevant quantities as electromagnetic torque, speed, voltages and current, all obtained in steady-state regime with MPC strategy, being selected for the highest efficiency values for a given pair of speed and torque. The learning process of the DDC strategy by a mutidimesional interpolation method leads to obtain high performances in both steady-state and dynamic regimes, without any additional optimal current reference command. A comparative analysis done in Matlab simulation environment of the results obtained by both MPC and DDC control laws shows the effectiveness of the last strategies. The DDC method provide a robust optimal control under energetic constraints, being more suitable then the classical MPC law that can not offers reliable results for a large area of conditions in practice. © 2024 IEEE.

关键词： MATLAB

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Cooperative adaptive cruise control with string stability based on DMPC for vehicle platooning 27

Cooperative adaptive cruise control with string stability ba...

引用

27th International Conference on system Theory, control and Computing, ICSTCC 2023

作者： Pauca, Ovidiu Lazar, Mircea Caruntu, Constantin F. Dept. of Automatic Control and Applied Informatics Gheorghe Asachi" Technical University of Iasi Iasi Romania Dept. of Electrical Engineering Eindhoven University of Technology Eindhoven Netherlands

ISBN: (纸本)9798350337983

The cooperative adaptive cruise control (CACC) functionality received significant interest in the state-of-the-art due to its advantages in optimizing traffic flow. The model-based predictive control (MPC) strategy was used in various studies due to its advantages in improving the performance of the vehicles (reducing the travel costs, improving the quality of the travel by reducing sudden accelerations, and ensuring the stability of the platoons). Moreover, MPC solutions are built to maximize the advantages of vehicular communication by sharing predictions on states of vehicles (e.g., velocities, accelerations, trajectories). In addition, MPC is also used to compensate for the disturbances added by communications. Thus, this paper proposes a CACC strategy for a vehicle platoon. The solution is based on the distributed MPC (DMPC) strategy, and the controller is proposed in discrete time, ensuring predecessor-follower string stability for the whole platoon. © 2023 IEEE.

关键词： Vehicles

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Zero-Shot Learning for Intelligent Fault Detection 27

Zero-Shot Learning for Intelligent Fault Detection

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27th International Conference on Automation and Computing, ICAC 2022

作者： Zhang, Siyu Wei, Hua-Liang University of Sheffield Dept. Automatic Control and Systems Engineering Sheffield United Kingdom

ISBN: (数字)9781665498074

ISBN: (纸本)9781665498074

Signal-based fault detection, as an essential technology in many engineering and industrial applications, has received extensive attention. Nevertheless, in a real-world application setting, collecting samples for some specific types of faults may be time-consuming and damaging, implying that samples of unseen faults may be unavailable in the training step. Keeping this in mind, we present a new semantic space-based zero-shot learning (SSB-ZSL) method for fault detection. The implementation of the method comprises three phases: feature extraction, human-defined semantic space, and a feature embedding model to address this issue. To evaluate the proposed method, we carry out experiments on two real datasets: a vibration-based rolling element bearing dataset from Case Western Reserve University, and an acoustic-based air compressor fault dataset. The results are promising and significantly better than that given by the compared state-of-the-art methods, showing that the proposed method can effectively detect unseen types of faults in the absence of their samples. © 2022 IEEE.

关键词： Fault detection

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High-Speed Operational Amplifier Based On Complementary 'Folded' Cascodes 3

High-Speed Operational Amplifier Based On Complementary 'Fol...

引用

3rd IEEE International Conference on Problems of Informatics, Electronics and Radio engineering, PIERE 2024

作者： Kuznetsov, Dmitry V. Kleimenkin, Dmitriy V. Prokopenko, Nikolay N. Titov, Alexey E. Don State Technical University Dept. of Scientific Research Dept. of Information Systems and Radio Engineering Rostov-na-Donu Russia Don State Technical University Dept. of Information Systems and Radio Engineering Rostov-na-Donu Russia Southern Federal University Dept. of Automatic Control Systems Rostov-na-Donu Russia

ISBN: (纸本)9798331516321

A significant disadvantage of classical operational amplifiers with a complementary 'folded' cascode is that in the dynamic overload mode of the input differential stage, the maximum output current of the 'folded' cascode is tightly coupled to the currents of the current-stabilizing bipoles that establish its static mode. This prevents (under the static current consumption limitations of the operational amplifier) a fast recharge of the integrating correction capacitor, which limits the maximum slew rate of the output voltage. The paper discusses new circuit solutions of CBJT operational amplifier based on complementary 'folded' cascodes and input differential stage of dual-input stage subclass to increase slew rate from 215 V/μs to 8000 V/μs level. The problem solved here is to provide higher levels of 'folded' cascode output current during the transient edge. This effect is achieved by introducing three additional small capacitance correction capacitors into the circuit. It is possible to introduce a special current limiting resistor in series with the third additional capacitor to reduce overshoot during the transient edge. The proposed modifications of operational amplifier have significant advantages in comparison with the classical ones based on complementary 'folded' cascodes in terms of slew rate level. Results of computer modeling of the operational amplifier in LTSpice environment for silicon CBJT technological process with micron topological norms are presented. © 2024 IEEE.

关键词： Operational amplifiers

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Research of a Filter on Switchable Capacitors with Three-Phase control of Electronic Keys

Research of a Filter on Switchable Capacitors with Three-Pha...

引用

2024 Wave Electronics and its Application in Information and Telecommunication systems, WECONF 2024

作者： Denisenko, Darya Titov, Alexey Butyrlagin, Nikolay Zhuk, Alexey Don State Technical University Dept. Of Scientific Research Rostov-on-Don Russia Southern Federal University Dept. Of Automatic Control Systems Rostov-on-Don Russia Don State Technical University Dept. Of Information Systems And Radio Engineering Rostov-on-Don Russia

ISBN: (纸本)9798350364989

A low frequencies filter of the second order on switched capacitors has been developed and studied, the distinctive feature of which is three-phase control of three electronic keys. In the proposed circuit, this allows, at constant parameters of the frequency-setting capacitors and a fixed switching frequency of electronic keys, to control the frequency of the filter pole by changing the ratio of the resistances of resistors in the general feedback circuit. The basic equations for the filter transmission coefficients at zero frequency and at the pole frequency are given, as well as formulas for calculating the pole frequency and pole attenuation at the second order. A simulation of the filter was made in the Micro-Cap environment, which shows that the considered circuit solution performs the functions of a low-pass filter. Considered filter on switched capacitors can be used to create new adaptive measuring systems and analog-digital signal processing devices. © 2024 IEEE.

关键词： Transient analysis

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Data-driven modeling of heat pumps and thermal storage units for MPC

Data-driven modeling of heat pumps and thermal storage units...

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2023 International Conference on the Built Environment in Transition, CISBAT 2023

作者： Brandes, M. Cai, H. Vivian, J. Croci, L. Heer, P. Smith, R. Urban Energy Systems Laboratory Empa Dübendorf Switzerland Dept. of Industrial Engineering University of Padova Padua Italy Dept. of Power System Development Ricerca Sistema Energetico SpA Milan Italy Automatic Control Laboratory Department of Electrical Engineering and Information Technology ETH Zurich Switzerland

Heat pumps can play a crucial role in the European energy strategy 2050, which aims to achieve net-zero greenhouse gas emissions. When coupled with thermal energy storage and integrated with advanced control strategies, heat pump operation can be optimized to reduce carbon footprint and respond to the needs of system operators. However, to scale in a multitude of buildings, the transferability of the modeling into heterogeneous systems is crucial. In this paper, two different interpretable linear models, a hybrid (grey-box) and a fully data-driven (black-box) model are investigated. Specifically, two regression-based identification methods (SINDYc and DMDc) are used for dynamic models and the LASSO regression is used for static models. The transferability of the approach is evaluated using two real-world facilities with heterogeneous sizing and configuration. The results show a similar simulation performance for both cases with a maximum normalized RMSE of 0.41 and 0.60, respectively. This confirms the transferability of the approach that is necessary for large-scale implementation. © 2023 Institute of Physics Publishing. All rights reserved.

关键词： Carbon footprint

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A Probabilistic Topology Inference Method for Networked Dynamical system via Single Excitation 63

A Probabilistic Topology Inference Method for Networked Dyna...

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63rd IEEE Conference on Decision and control, CDC 2024

作者： Jiao, Qing Li, Yushan He, Jianping Shanghai Jiao Tong University Key Laboratory of System Control and Information Processing Ministry of Education of China Shanghai Engineering Research Center of Intelligent Control and Management Dept. of Automation Shanghai China

ISBN: (纸本)9798350316339

A growing number of works have investigated inferring the topology of networked dynamical systems from observations, such as to better understand the system behaviour. Despite the tremendous advances, most of them require the observations to be abundant. This paper focuses on inferring the topology by injecting single excitation on a node and collecting several steps of noisy observations. The problem is challenging because the noises cannot be depressed in several observations and are mixed with the injected excitation, making it hard to directly reveal the topology. To practice, we develop a probabilistic method based on the hypothesis test framework. First, we infer the neighbors that are within h-hop of the excited node and derive the accuracy guarantees. Then, we extend the method to infer the exact h-hop neighbors. A computable lower bound for the accuracy probability is established to provide confidence support in the inference procedures. Furthermore, we give the conditions of excitation input to ensure a desired inference probability, which provides guidance for the input design. Numerical simulations are conducted to verify the effectiveness of the proposed method. © 2024 IEEE.

关键词： Network topology

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Method for Increasing the OpAmp's Speed on the Basis of Complementary 'Folded' Cascodes

Method for Increasing the OpAmp's Speed on the Basis of Comp...

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2024 Conference of Young Researchers in Electrical and Electronic engineering, ElCon 2024

作者： Kleimenkin, Dmitriy V. Pakhomov, Ilya V. Denisenko, Darya Y. Don State Technical University Dept. of Scientific Research Dept. of Information Systems and Radio Engineering Rostov-on-Don Russia Don State Technical University Dept. of Scientific Research Dept. of Instrumentation and Biomedical Engineering Rostov-on-Don Russia Don State Technical University Dept. of Scientific Research Rostov-on-Don Russia Southern Federal University Dept. of Automatic Control Systems Rostov-on-Don Russia

ISBN: (纸本)9798350360646

The paper presents a promising method of increasing by more than an order of magnitude the maximum slew rate (SR) of integrated operational amplifiers (OpAmps) based on two-cycle 'folded' cascodes. This method is based on the introduction of special differentiating transient correction circuits into the classical circuits of OpAmps. Developed on the basis of the MH2XA031 array chip, the high-speed OpAmp is recommended for practical use in the subclass of so-called discrete-analog SC-filters on switched capacitors, for which (in some important cases) higher SR values are required. The effect of significantly improving the OpAmp's speed is to provide higher output current levels of the two-cycle 'folded' cascode that recharges the integrating correction capacitor during the transient edge. The OpAmp's speed performance in the large-signal mode is increased from 248.7 ~V / μ s to 4148 ~V / μ s as a result of this. © 2024 IEEE.

关键词： BJT GaAs high-temperature chips high-temperature integrated resistors nJFET operational amplifier

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