Yuri Bocharov - Academia.edu (original) (raw)

Papers by Yuri Bocharov

In this paper, we consider the implementation of a recurrent artificial neural network LSTM on th... more In this paper, we consider the implementation of a recurrent artificial neural network LSTM on the NM6407 digital signal processor (DSP) that is optimized for performing vector and matrix calculations. It contains two NeuroMatrix NMC4 cores, each of which includes RISC processor and vector coprocessor. The architectural features and processor resources are considered, as well as an assessment of its performance in the implementation of the LSTM network to solve a typical classification problem. The implementation of this type of network on the NM6407 tensor core accelerated computations by a factor of 15–350 compared to a scalar processor.

Procedia Computer Science, 2018

The safety levels with respect to human exposure to electromagnetic fields (EMF) are defined by N... more The safety levels with respect to human exposure to electromagnetic fields (EMF) are defined by National safety standards. However, today serious contradictions have arisen between the existing standards and new experimental data. Firstly, the significant influence of weak EMF on psychophysiology and human health is shown. Secondly, the EMF effects are substantially dependent on the individual sensitivity of a specific person, multiple exposure and dose accumulation. In this article, the methods and instrumental techniques for the experimental research of an individual human's sensitivity to EMF doses are presented. The aggregate of results as a new challenge for today standards of EMF safety is discussed.

Procedia Computer Science, 2018

The advanced instrumental technique for research and control of the motivation of the experimenta... more The advanced instrumental technique for research and control of the motivation of the experimental animals under the weak microwave electromagnetic radiation are suggested. The microwave is modulated by interval patterns. The results of these physiological and metabolites experiments showed that long-distance low-intensive, special coded microwave exposition can change the current motivations and corresponding behavior of animals. These results can be used in the studies of the fundamental brain mechanisms and in the medicine.

Procedia Computer Science, 2020

The advanced techniques and instrumentation for electromagnetic environmental contamination monit... more The advanced techniques and instrumentation for electromagnetic environmental contamination monitoring in mega polices are suggested. Thousands of residents of large metropolitan areas are expected to be equipped with portable instruments that continuously determine their location and the level of microwave radiation in the ranges of mobile communications absorbed by them. The total consolidated information from these personal devices is supposed to be collected and processed by a server center of the Urban Environmental Monitoring Department. Many freely, randomly moving people and vehicles, equipped with measuring and data logging instruments, which are connected to the central office by communication channels form a distributed non-deterministic data acquisition system that has some advances over the conventional ones. This allows you to create online city maps with the real-time data about the electromagnetic environment. In addition, these data can be used to study the effects of microwave radiation on people's health and cognitive abilities.

arXiv (Cornell University), Oct 10, 2012

This paper describes a pipelined analog-to-digital converter (ADC) employing a power and area eff... more This paper describes a pipelined analog-to-digital converter (ADC) employing a power and area efficient architecture. The adjacent stages of a pipeline share operational amplifiers. In order to keep accuracy of the amplifiers in the first stages, they use a partially sharing technique. The feature of the proposed scheme is that it also shares the comparators. The capacitors of the first stages of a pipeline are scaled down along a pipeline for a further reducing the chip area and its power consumption. A 9-bit 20-MSamples/s ADC, intended for use in multi-channel mixed-signal chips, has been fabricated via Europractice in a 180-nm CMOS process from UMC. The prototype ADC shows a spurious-free dynamic range of 58.5 dB at a sample rate of 20 MSamples/s, when a 400 kHz input signal with a swing of 1 dB below full scale is applied. The effective number of bits is 8.0 at the same conditions. ADC occupies an active area of 0.4 mm 2 and dissipates 8.6 mW at a 1.8 V supply.

2016 IEEE Workshop on Environmental, Energy, and Structural Monitoring Systems (EESMS), 2016

There are a lot of new experimental data confirming an essential effect of weak microwave field o... more There are a lot of new experimental data confirming an essential effect of weak microwave field on human psychophysiological state. This influence may have negative consequences for human-operator fulfilling critical mission. The paper covers a new instrumental method for research of the individual human sensitivity to weak microwave exposure. The volunteers were irradiated by the remotely controlled low-intensity electromagnetic fields source under GSM safety specs. Throughout the investigations, volunteers were performing the psychological tests and their heart rate parameters were registered. The paper presents the architecture of the designed hardware-software system and main modules implementation. It also discusses the results of psychophysiological and human's cardiac reactions to microwave fields. The proposed research method and obtained data may be used for operator's state monitoring in Environmental and Structural Monitoring Systems.

2020 22th International Conference on Digital Signal Processing and its Applications (DSPA)

In this paper, we consider the implementation of a recurrent artificial neural network LSTM on th... more In this paper, we consider the implementation of a recurrent artificial neural network LSTM on the NM6407 digital signal processor (DSP) that is optimized for performing vector and matrix calculations. It contains two NeuroMatrix NMC4 cores, each of which includes RISC processor and vector coprocessor. The architectural features and processor resources are considered, as well as an assessment of its performance in the implementation of the LSTM network to solve a typical classification problem. The implementation of this type of network on the NM6407 tensor core accelerated computations by a factor of 15–350 compared to a scalar processor.

2019 19th European Conference on Radiation and Its Effects on Components and Systems (RADECS)

Radiation hardened ADC with automatic offset voltage compensation was developed. TID radiation ef... more Radiation hardened ADC with automatic offset voltage compensation was developed. TID radiation effect in the ADC was investigated at different temperatures. The designed ADC devices demonstrate high radiation hardness. Up to total dose level 100 krad(Si) any significant radiation induced drift didn't observed in transfer characteristics of all irradiated devices. It is achieved by using techniques such as application of automatic offset voltage compensation circuit together with enclosed layout transistors (ELT), located in ADC control logic. Also, edge-less n-channel MOSFETs with additional guard rings were used to increase the radiation hardness of digital interface and control logic of ADC. In contrast with control logic ELT not used in interface logic. Thus significant degradation of digital interface power supply current was observed unlike control logic power supply. Developed device can be considered as a good technical decision for self-diagnostic systems of electronic devices proposed for application under ionizing radiation impact, especially for systems of spacecrafts and satellites.

2017 IEEE Workshop on Environmental, Energy, and Structural Monitoring Systems (EESMS), 2017

Based on open-air gas-discharge counter developed pedestrian portal monitor can detect much small... more Based on open-air gas-discharge counter developed pedestrian portal monitor can detect much smaller amounts of alpha-radioactive nuclides than the best of the currently used stationary radiation monitors on the basis of gamma-ray scintillation detectors.

Russian Microelectronics, 2008

A comparative analysis is presented of major methods for reducing power consumption in pipelined ... more A comparative analysis is presented of major methods for reducing power consumption in pipelined ADCs. They are classified into two groups: (1) methods for the structural or parametric optimization of the conventional architecture and (2) original circuit configurations designed to minimize the power consumption by individual units.

Instruments and Experimental Techniques

An application specific integrated circuit (ASIC), consisting of nine basic channels and one auxi... more An application specific integrated circuit (ASIC), consisting of nine basic channels and one auxiliary channel, each containing a 10-bit successive-approximation analog-to-digital converter (ADC), is designed and tested. The microcircuit also includes a buffer storage unit and a reference-voltage source. The microcircuit is intended for converting signals of silicon photomultiplier arrays. To decrease the differential nonlinearity of the ADC without recourse to autocalibration, a new method, based on introducing additional elements into the layout of ADC capacitor arrays, is proposed. The basic feature of the designed microcircuit, which is oriented at the application in the portable equipment with a self-contained power supply, is the low power consumption, which does not exceed 0.5 mW per channel at a sample frequency of 150 kHz.

2019 International Siberian Conference on Control and Communications (SIBCON), 2019

An integrated circuit of a digital isolator comprising a transceiver chip implemented in standard... more An integrated circuit of a digital isolator comprising a transceiver chip implemented in standard 180 nm CMOS process as well as micro-transformers implemented in a special 90 nm technology is presented. The coreless transformer placed on a separate chip has a stacked structure with two adjacent planar copper windings in two layers separated by a silicon dioxide insulator. The transceiver utilizes a pulse edges encoding technique for transmitting signals through the insulation barrier. The proposed digital isolator has a feature in the topology of the elements, which ensures tolerance to the effects of ionizing radiation, as well as the small size of transformers, which makes it possible to create multichannel integrated circuits in small-sized packages. The tested prototype of the digital isolator provided a data transfer rate of more than 30 Mbps. As much as 2.5 kV isolation voltage is achieved between the coils of transformer.

This paper describes a pipelined analog-to-digital converter (ADC) employing a power and area eff... more This paper describes a pipelined analog-to-digital converter (ADC) employing a power and area efficient architecture. The adjacent stages of a pipeline share operational amplifiers. In order to keep accuracy of the amplifiers in the first stages, they use a partially sharing technique. The feature of the proposed scheme is that it also shares the comparators. The capacitors of the first stages of a pipeline are scaled down along a pipeline for a further reducing the chip area and its power consumption. A 9-bit 20-MSamples/s ADC, intended for use in multi-channel mixed-signal chips, has been fabricated via Europractice in a 180-nm CMOS process from UMC. The prototype ADC shows a spurious-free dynamic range of 58.5 dB at a sample rate of 20 MSamples/s, when a 400 kHz input signal with a swing of 1 dB below full scale is applied. The effective number of bits is 8.0 at the same conditions. ADC occupies an active area of 0.4 mm2 and dissipates 8.6 mW at a 1.8 V supply.

Procedia Computer Science, 2020

Abstract The article discusses an implementation of the algorithm of the optimal use of RAM by a ... more Abstract The article discusses an implementation of the algorithm of the optimal use of RAM by a digital filter in image processing systems. The advantages of such an algorithm with respect to the entire frame buffering technique are considered. The performance of the proposed solution is demonstrated by a series of software and hardware tests implemented in FPGA. Using the algorithm allows to achieve significant memory savings and improve image quality after processing when implementing neural network methods for pattern recognition and classification, which is especially important for vision systems of small autonomous moving objects with severe restrictions on the amount of hardware and energy resources. The proposed algorithm has been tested in several software tests and hardware-verified in FPGA.

Procedia Computer Science, 2020

Abstract The advanced techniques and instrumentation for electromagnetic environmental contaminat... more Abstract The advanced techniques and instrumentation for electromagnetic environmental contamination monitoring in mega polices are suggested. Thousands of residents of large metropolitan areas are expected to be equipped with portable instruments that continuously determine their location and the level of microwave radiation in the ranges of mobile communications absorbed by them. The total consolidated information from these personal devices is supposed to be collected and processed by a server center of the Urban Environmental Monitoring Department. Many freely, randomly moving people and vehicles, equipped with measuring and data logging instruments, which are connected to the central office by communication channels form a distributed non-deterministic data acquisition system that has some advances over the conventional ones. This allows you to create online city maps with the real-time data about the electromagnetic environment. In addition, these data can be used to study the effects of microwave radiation on people’s health and cognitive abilities.

Instruments and Experimental Techniques

A multichannel integrated circuit intended for readout and analog preprocessing of signals from m... more A multichannel integrated circuit intended for readout and analog preprocessing of signals from multielement photodetectors has been designed and evaluated. It is optimized for use with silicon photomultiplier arrays. The chip includes current-signal and voltage-signal processing channels. Except for the front end, all of the channels are identical. Each of them contains a code-controlled current amplifier, an integrator, two digitally controlled variable gain amplifiers, a filter, a peak detector, an output buffer with a level shifter, an amplitude discriminator, two timers, and a control unit. The device is configured and tuned by uploading data via a serial interface. The chip is part of a chipset that also includes a multichannel analog-todigital converter with a buffer memory and voltage reference. This chipset makes it possible to build a fullfeatured multielement photodetector signal-processing system, as well as signal processing systems for multichannel detectors of other types. The integrated circuit is implemented in the 0.35 μm CMOS process. This paper also describes the features of the circuits of the device, analyzes the parameters of several of its basic units, and discusses the test results.

Procedia Computer Science

Procedia Computer Science

In this paper, we consider the implementation of a recurrent artificial neural network LSTM on th... more In this paper, we consider the implementation of a recurrent artificial neural network LSTM on the NM6407 digital signal processor (DSP) that is optimized for performing vector and matrix calculations. It contains two NeuroMatrix NMC4 cores, each of which includes RISC processor and vector coprocessor. The architectural features and processor resources are considered, as well as an assessment of its performance in the implementation of the LSTM network to solve a typical classification problem. The implementation of this type of network on the NM6407 tensor core accelerated computations by a factor of 15–350 compared to a scalar processor.

Procedia Computer Science, 2018

The safety levels with respect to human exposure to electromagnetic fields (EMF) are defined by N... more The safety levels with respect to human exposure to electromagnetic fields (EMF) are defined by National safety standards. However, today serious contradictions have arisen between the existing standards and new experimental data. Firstly, the significant influence of weak EMF on psychophysiology and human health is shown. Secondly, the EMF effects are substantially dependent on the individual sensitivity of a specific person, multiple exposure and dose accumulation. In this article, the methods and instrumental techniques for the experimental research of an individual human's sensitivity to EMF doses are presented. The aggregate of results as a new challenge for today standards of EMF safety is discussed.

Procedia Computer Science, 2018

The advanced instrumental technique for research and control of the motivation of the experimenta... more The advanced instrumental technique for research and control of the motivation of the experimental animals under the weak microwave electromagnetic radiation are suggested. The microwave is modulated by interval patterns. The results of these physiological and metabolites experiments showed that long-distance low-intensive, special coded microwave exposition can change the current motivations and corresponding behavior of animals. These results can be used in the studies of the fundamental brain mechanisms and in the medicine.

Procedia Computer Science, 2020

The advanced techniques and instrumentation for electromagnetic environmental contamination monit... more The advanced techniques and instrumentation for electromagnetic environmental contamination monitoring in mega polices are suggested. Thousands of residents of large metropolitan areas are expected to be equipped with portable instruments that continuously determine their location and the level of microwave radiation in the ranges of mobile communications absorbed by them. The total consolidated information from these personal devices is supposed to be collected and processed by a server center of the Urban Environmental Monitoring Department. Many freely, randomly moving people and vehicles, equipped with measuring and data logging instruments, which are connected to the central office by communication channels form a distributed non-deterministic data acquisition system that has some advances over the conventional ones. This allows you to create online city maps with the real-time data about the electromagnetic environment. In addition, these data can be used to study the effects of microwave radiation on people's health and cognitive abilities.

arXiv (Cornell University), Oct 10, 2012

This paper describes a pipelined analog-to-digital converter (ADC) employing a power and area eff... more This paper describes a pipelined analog-to-digital converter (ADC) employing a power and area efficient architecture. The adjacent stages of a pipeline share operational amplifiers. In order to keep accuracy of the amplifiers in the first stages, they use a partially sharing technique. The feature of the proposed scheme is that it also shares the comparators. The capacitors of the first stages of a pipeline are scaled down along a pipeline for a further reducing the chip area and its power consumption. A 9-bit 20-MSamples/s ADC, intended for use in multi-channel mixed-signal chips, has been fabricated via Europractice in a 180-nm CMOS process from UMC. The prototype ADC shows a spurious-free dynamic range of 58.5 dB at a sample rate of 20 MSamples/s, when a 400 kHz input signal with a swing of 1 dB below full scale is applied. The effective number of bits is 8.0 at the same conditions. ADC occupies an active area of 0.4 mm 2 and dissipates 8.6 mW at a 1.8 V supply.

2016 IEEE Workshop on Environmental, Energy, and Structural Monitoring Systems (EESMS), 2016

There are a lot of new experimental data confirming an essential effect of weak microwave field o... more There are a lot of new experimental data confirming an essential effect of weak microwave field on human psychophysiological state. This influence may have negative consequences for human-operator fulfilling critical mission. The paper covers a new instrumental method for research of the individual human sensitivity to weak microwave exposure. The volunteers were irradiated by the remotely controlled low-intensity electromagnetic fields source under GSM safety specs. Throughout the investigations, volunteers were performing the psychological tests and their heart rate parameters were registered. The paper presents the architecture of the designed hardware-software system and main modules implementation. It also discusses the results of psychophysiological and human's cardiac reactions to microwave fields. The proposed research method and obtained data may be used for operator's state monitoring in Environmental and Structural Monitoring Systems.

2020 22th International Conference on Digital Signal Processing and its Applications (DSPA)

In this paper, we consider the implementation of a recurrent artificial neural network LSTM on th... more In this paper, we consider the implementation of a recurrent artificial neural network LSTM on the NM6407 digital signal processor (DSP) that is optimized for performing vector and matrix calculations. It contains two NeuroMatrix NMC4 cores, each of which includes RISC processor and vector coprocessor. The architectural features and processor resources are considered, as well as an assessment of its performance in the implementation of the LSTM network to solve a typical classification problem. The implementation of this type of network on the NM6407 tensor core accelerated computations by a factor of 15–350 compared to a scalar processor.

2019 19th European Conference on Radiation and Its Effects on Components and Systems (RADECS)

Radiation hardened ADC with automatic offset voltage compensation was developed. TID radiation ef... more Radiation hardened ADC with automatic offset voltage compensation was developed. TID radiation effect in the ADC was investigated at different temperatures. The designed ADC devices demonstrate high radiation hardness. Up to total dose level 100 krad(Si) any significant radiation induced drift didn't observed in transfer characteristics of all irradiated devices. It is achieved by using techniques such as application of automatic offset voltage compensation circuit together with enclosed layout transistors (ELT), located in ADC control logic. Also, edge-less n-channel MOSFETs with additional guard rings were used to increase the radiation hardness of digital interface and control logic of ADC. In contrast with control logic ELT not used in interface logic. Thus significant degradation of digital interface power supply current was observed unlike control logic power supply. Developed device can be considered as a good technical decision for self-diagnostic systems of electronic devices proposed for application under ionizing radiation impact, especially for systems of spacecrafts and satellites.

2017 IEEE Workshop on Environmental, Energy, and Structural Monitoring Systems (EESMS), 2017

Based on open-air gas-discharge counter developed pedestrian portal monitor can detect much small... more Based on open-air gas-discharge counter developed pedestrian portal monitor can detect much smaller amounts of alpha-radioactive nuclides than the best of the currently used stationary radiation monitors on the basis of gamma-ray scintillation detectors.

Russian Microelectronics, 2008

A comparative analysis is presented of major methods for reducing power consumption in pipelined ... more A comparative analysis is presented of major methods for reducing power consumption in pipelined ADCs. They are classified into two groups: (1) methods for the structural or parametric optimization of the conventional architecture and (2) original circuit configurations designed to minimize the power consumption by individual units.

Instruments and Experimental Techniques

An application specific integrated circuit (ASIC), consisting of nine basic channels and one auxi... more An application specific integrated circuit (ASIC), consisting of nine basic channels and one auxiliary channel, each containing a 10-bit successive-approximation analog-to-digital converter (ADC), is designed and tested. The microcircuit also includes a buffer storage unit and a reference-voltage source. The microcircuit is intended for converting signals of silicon photomultiplier arrays. To decrease the differential nonlinearity of the ADC without recourse to autocalibration, a new method, based on introducing additional elements into the layout of ADC capacitor arrays, is proposed. The basic feature of the designed microcircuit, which is oriented at the application in the portable equipment with a self-contained power supply, is the low power consumption, which does not exceed 0.5 mW per channel at a sample frequency of 150 kHz.

2019 International Siberian Conference on Control and Communications (SIBCON), 2019

An integrated circuit of a digital isolator comprising a transceiver chip implemented in standard... more An integrated circuit of a digital isolator comprising a transceiver chip implemented in standard 180 nm CMOS process as well as micro-transformers implemented in a special 90 nm technology is presented. The coreless transformer placed on a separate chip has a stacked structure with two adjacent planar copper windings in two layers separated by a silicon dioxide insulator. The transceiver utilizes a pulse edges encoding technique for transmitting signals through the insulation barrier. The proposed digital isolator has a feature in the topology of the elements, which ensures tolerance to the effects of ionizing radiation, as well as the small size of transformers, which makes it possible to create multichannel integrated circuits in small-sized packages. The tested prototype of the digital isolator provided a data transfer rate of more than 30 Mbps. As much as 2.5 kV isolation voltage is achieved between the coils of transformer.

This paper describes a pipelined analog-to-digital converter (ADC) employing a power and area eff... more This paper describes a pipelined analog-to-digital converter (ADC) employing a power and area efficient architecture. The adjacent stages of a pipeline share operational amplifiers. In order to keep accuracy of the amplifiers in the first stages, they use a partially sharing technique. The feature of the proposed scheme is that it also shares the comparators. The capacitors of the first stages of a pipeline are scaled down along a pipeline for a further reducing the chip area and its power consumption. A 9-bit 20-MSamples/s ADC, intended for use in multi-channel mixed-signal chips, has been fabricated via Europractice in a 180-nm CMOS process from UMC. The prototype ADC shows a spurious-free dynamic range of 58.5 dB at a sample rate of 20 MSamples/s, when a 400 kHz input signal with a swing of 1 dB below full scale is applied. The effective number of bits is 8.0 at the same conditions. ADC occupies an active area of 0.4 mm2 and dissipates 8.6 mW at a 1.8 V supply.

Procedia Computer Science, 2020

Abstract The article discusses an implementation of the algorithm of the optimal use of RAM by a ... more Abstract The article discusses an implementation of the algorithm of the optimal use of RAM by a digital filter in image processing systems. The advantages of such an algorithm with respect to the entire frame buffering technique are considered. The performance of the proposed solution is demonstrated by a series of software and hardware tests implemented in FPGA. Using the algorithm allows to achieve significant memory savings and improve image quality after processing when implementing neural network methods for pattern recognition and classification, which is especially important for vision systems of small autonomous moving objects with severe restrictions on the amount of hardware and energy resources. The proposed algorithm has been tested in several software tests and hardware-verified in FPGA.

Procedia Computer Science, 2020

Abstract The advanced techniques and instrumentation for electromagnetic environmental contaminat... more Abstract The advanced techniques and instrumentation for electromagnetic environmental contamination monitoring in mega polices are suggested. Thousands of residents of large metropolitan areas are expected to be equipped with portable instruments that continuously determine their location and the level of microwave radiation in the ranges of mobile communications absorbed by them. The total consolidated information from these personal devices is supposed to be collected and processed by a server center of the Urban Environmental Monitoring Department. Many freely, randomly moving people and vehicles, equipped with measuring and data logging instruments, which are connected to the central office by communication channels form a distributed non-deterministic data acquisition system that has some advances over the conventional ones. This allows you to create online city maps with the real-time data about the electromagnetic environment. In addition, these data can be used to study the effects of microwave radiation on people’s health and cognitive abilities.

Instruments and Experimental Techniques

A multichannel integrated circuit intended for readout and analog preprocessing of signals from m... more A multichannel integrated circuit intended for readout and analog preprocessing of signals from multielement photodetectors has been designed and evaluated. It is optimized for use with silicon photomultiplier arrays. The chip includes current-signal and voltage-signal processing channels. Except for the front end, all of the channels are identical. Each of them contains a code-controlled current amplifier, an integrator, two digitally controlled variable gain amplifiers, a filter, a peak detector, an output buffer with a level shifter, an amplitude discriminator, two timers, and a control unit. The device is configured and tuned by uploading data via a serial interface. The chip is part of a chipset that also includes a multichannel analog-todigital converter with a buffer memory and voltage reference. This chipset makes it possible to build a fullfeatured multielement photodetector signal-processing system, as well as signal processing systems for multichannel detectors of other types. The integrated circuit is implemented in the 0.35 μm CMOS process. This paper also describes the features of the circuits of the device, analyzes the parameters of several of its basic units, and discusses the test results.

Procedia Computer Science

Procedia Computer Science