- Advanced Research in Systems and Signal Processing
- Advanced Signal Processing Techniques
- Sensor Technology and Measurement Systems
- Advanced Control and Stabilization in Aerospace Systems
- Cybersecurity and Information Systems
- Control Systems and Identification
- Fault Detection and Control Systems
- Radio Frequency Integrated Circuit Design
- Analog and Mixed-Signal Circuit Design
- Laser Design and Applications
- Knowledge Management and Technology
- Engineering Education and Technology
- Semiconductor Lasers and Optical Devices
- Industrial and Mining Safety
- Advanced Electrical Measurement Techniques
- Wireless Sensor Networks for Data Analysis
- Iterative Learning Control Systems
- Advanced Data Processing Techniques
- Photonic and Optical Devices
- Chaos-based Image/Signal Encryption
- Advanced Fiber Laser Technologies
- Advanced Photonic Communication Systems
- Network Security and Intrusion Detection
- Complex Systems and Dynamics
- Advanced Machining and Optimization Techniques
Don State Technical University
2022-2024
Institute of Service and Entrepreneurship of DGTU
2022
The relevance of the present research is related to search for promising ideas increasing maximum slew rate output voltage ($\text{SR}_{\text{M}}$) new-generation operational amplifiers (OpAmps). Proposed circuit techniques that provide (with simultaneous use) an increase in $\text{SR}_{\text{M}}$ by more than 2 orders magnitude. Such high-speed are demand today application drivers ADCs (AD9208, AD9691, etc.), and as active elements circuits analog-to-discrete filters on switched capacitors....
The article deals with issues related to the manifestation of properties synergy and emergence, potentially inherent in systems same or similar components. These can be used increase accuracy estimates frequency signals system simultaneously independently functioning oscillators. It makes possible stability generated signals. To implement these properties, simultaneous measurement signal phase values at a number time intervals subsequent processing using likelihood function used. is shown...
This article discusses the possibility of generalizing existing methods optimization observations to problems resource management intrusion detection systems. The aim this work is study applied aspects application surveillance method, which increases efficiency using resources set goal was achieved through following tasks: (1) on basis experimental data, development a dynamic model controlled object and observation carried out; (2) numerical modeling solution problem optimizing state...
When using quadrature signals in radio channels, flat and selective fading, multipath reception, intersymbol interference, jitter occur. In addition to the need accurately estimate value of phase difference at current previous clock intervals, a critical factor receiving demodulating such is accuracy measuring amplitude their samples. signals, an approach possible, basis which measure values individual signal samples discrete time points with higher than existing electronic devices. Such can...
The purpose of the article is to analyze combined effect amplitude white Gaussian noise(AWGN) present in communication channel and frequency noise (FN) resulting from fluctuations inthe signal on probability bit error when processingQAM signals. Research tasks be solved: 1. Development a mathematical model for processing theQAM signal, taking into account effects AWGN FN channel.2. Numerical study A proposed that establishes relationship between thesignal-to-noise ratio mean square deviation...
The report discusses the topic of estimating time-frequency parameters signals. estimation these is carried out based on results simultaneous measurement signal phases finding maximum likelihood function. function constructed using a generalized distribution law. proposed model law allows us to fully take into account their real due influence various factors. It shown that when coincides with law, obtained estimates frequency-time signals have property efficiency and consistency. Numerical...
Analog low-pass filters (LPF) are used in the input circuits of control and monitor systems (CMS) as pre-processing devices for analog information anti-aliasing at ADC inputs to reduce aliasing errors during time sampling signals. This article considers components maximum dynamic error circuit CMS when using LPFs based on switched-capacitors (SC LPF). There five total circuit: a sensor error; an first class second delay SC LPF. It is noted that processes identical sample-and-hold (S/H...
To eliminate the unwanted spectral components in processed signals automatic control and monitoring systems, most often low-pass (LPFs) band-pass filters (BPFs) are used. They performed on basis of analog (continuous) circuits, as well analog-to-discrete (switched capacitors) digital ones by means software or hardware implementation. In such information delay causes a dynamic component their error. The error is part total system it reduces permissible velocity its operation. article...
A circuit design of a high-speed CBJT operational amplifier (OpAmp) based on an "folded" cascode is proposed, in which differentiating transient correction introduced to increase the maximum slew rate output voltage (SR). The considered OpAmp intended for use subclass so-called discrete-to-analog SC filters switched capacitors, where (in some important cases) higher SR values are required. In addition, such OpAmps demand drivers analog-to-digital converters and other devices automatics...
A circuit technique for increasing the maximum slew rate (SR) of output voltage a classical CBJT operational amplifier (OpAmp) with an AB class input stage, which has become basis several commercially available microcircuits, is discussed. For this purpose, two additional differentiating capacitors are provided in stage to increase SR by 1-2 orders magnitude. The results computer simulation OpAmp typical silicon technological process micron topological standard presented, showed that...
The article discusses the questions of improving accuracy estimates frequency signals in a system simultaneously and independently functioning generators. proposed theoretical principles increasing obtained is based on use properties synergy emergence potentially inherent such system. These can be realized by measuring phase values at certain time interval subsequent processing. It shown that manifestation synergistic property operating generators makes it possible to reduce error estimating...
The circuitry of a switched-capacitor low-pass filter (SCF) is considered, in which it possible to tune the pole frequency without changing capacitances switched capacitors, for example, by selecting them same kind. To study suggested SCF circuit, analysis time domain was used, and obtained characteristics were further compared with generalized second-order analog filter. It shown that parameters implemented depend not only on capacitance values but also ratio resistances two additional...
Introduction. The article deals with issues related to the manifestation of primary fundamental properties large systems, such as synergy and emergence, potentially inherent in systems same or similar components. These can be implemented at a certain time interval when measuring values signal phases time. It is shown that synergistic property system simultaneously independently operating generators makes it possible reduce error estimating random fluctuations frequency generators, emergent...