A study of an LLC resonant DC/DC converter with capacitive output filter is accomplished. On the basis of an existing unified analysis based on the “first harmonic approximation” method, expressions for the determination of currents through the power devices and the resonant circuit components are obtained. The main load characteristics of the converter at ZVS mode are built.
{"title":"Investigation of an LLC resonant DC/DC converter with a capacitive output filter, Part I - Load Characteristics","authors":"A. Vuchev, T. Grigorova, I. Maradzhiev","doi":"10.1109/ET.2019.8878327","DOIUrl":"https://doi.org/10.1109/ET.2019.8878327","url":null,"abstract":"A study of an LLC resonant DC/DC converter with capacitive output filter is accomplished. On the basis of an existing unified analysis based on the “first harmonic approximation” method, expressions for the determination of currents through the power devices and the resonant circuit components are obtained. The main load characteristics of the converter at ZVS mode are built.","PeriodicalId":306452,"journal":{"name":"2019 IEEE XXVIII International Scientific Conference Electronics (ET)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130716004","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This paper presents the study of the reliability of modern modules for data measurement and transmission. Consideration is given to the ability to assess reliability when it is not possible to test a large number of modules. The evaluation capabilities based on cyclic reliability tests in combination with reliability prediction methodologies are shown. An experiment was conducted with the smart temperature sensor.
{"title":"A Smart Sensor Modules Reliability Estimation by Thermal Cycling Tests","authors":"T. Papanchev, A. Georgiev, J. Garipova","doi":"10.1109/ET.2019.8878668","DOIUrl":"https://doi.org/10.1109/ET.2019.8878668","url":null,"abstract":"This paper presents the study of the reliability of modern modules for data measurement and transmission. Consideration is given to the ability to assess reliability when it is not possible to test a large number of modules. The evaluation capabilities based on cyclic reliability tests in combination with reliability prediction methodologies are shown. An experiment was conducted with the smart temperature sensor.","PeriodicalId":306452,"journal":{"name":"2019 IEEE XXVIII International Scientific Conference Electronics (ET)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125128450","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The work presented in this paper focuses on a port development of a software driver for flashing MSP430 microcontrollers. The bootloader data stream is channeled over the wi-fi. To do this, one must have a proper bridge device that will connect a UART interface to the Internet and a high-level flashing application.
{"title":"Flash Programming Low Power Microcontrollers over the Internet","authors":"Lubomir Bogdanov, R. Ivanov","doi":"10.1109/ET.2019.8878542","DOIUrl":"https://doi.org/10.1109/ET.2019.8878542","url":null,"abstract":"The work presented in this paper focuses on a port development of a software driver for flashing MSP430 microcontrollers. The bootloader data stream is channeled over the wi-fi. To do this, one must have a proper bridge device that will connect a UART interface to the Internet and a high-level flashing application.","PeriodicalId":306452,"journal":{"name":"2019 IEEE XXVIII International Scientific Conference Electronics (ET)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133219908","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
We consider the actual problem of synthesizing specialized computing devices (SCDs) for periodic task scheduling to support autonomous functioning of a small UAV having limited computing resources. A specialized processor implements a given system of concurrent local algorithms. The problems of minimizing the number of processing units (PUs) in SCDs and minimizing the number of inter-processor connections are solved. We consider the issues of designing a control unit for switching PUs to optimize periodic computational process. The solution to the problem of partitioning a connection graph of PUs into weakly coupled fragments is proposed. To determine the expediency of partitioning optimization we propose an efficiency function.
{"title":"A Method for Synthesis of Specialized Processors to Support On-board Scheduling of Periodic Tasks","authors":"V. Khachumov, M. Khachumov","doi":"10.1109/ET.2019.8878619","DOIUrl":"https://doi.org/10.1109/ET.2019.8878619","url":null,"abstract":"We consider the actual problem of synthesizing specialized computing devices (SCDs) for periodic task scheduling to support autonomous functioning of a small UAV having limited computing resources. A specialized processor implements a given system of concurrent local algorithms. The problems of minimizing the number of processing units (PUs) in SCDs and minimizing the number of inter-processor connections are solved. We consider the issues of designing a control unit for switching PUs to optimize periodic computational process. The solution to the problem of partitioning a connection graph of PUs into weakly coupled fragments is proposed. To determine the expediency of partitioning optimization we propose an efficiency function.","PeriodicalId":306452,"journal":{"name":"2019 IEEE XXVIII International Scientific Conference Electronics (ET)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115251947","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This article describes the design and implementation of an Embedded Interactive Timing System. Such systems are used in the therapy of children who have learning problems. The matching of different beats can help the brain work more efficiently. A methodology and architecture of an interactive timing is proposed. Open-source software environment and microcontroller is used for the practical realization of the system. Some results of the program functioning are shown.
{"title":"Design and Implementation of an Embedded Interactive Timing System for Medical Treatment of Patients with Learning and Attention Issues","authors":"M. Angelova, Yuliyan Velchev, K. Dimitrov","doi":"10.1109/ET.2019.8878319","DOIUrl":"https://doi.org/10.1109/ET.2019.8878319","url":null,"abstract":"This article describes the design and implementation of an Embedded Interactive Timing System. Such systems are used in the therapy of children who have learning problems. The matching of different beats can help the brain work more efficiently. A methodology and architecture of an interactive timing is proposed. Open-source software environment and microcontroller is used for the practical realization of the system. Some results of the program functioning are shown.","PeriodicalId":306452,"journal":{"name":"2019 IEEE XXVIII International Scientific Conference Electronics (ET)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116205905","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In the past few years, blockchain thechnologies have sparked a lot of interest in the scientific and businness communities. The working Bitcoin blockchain has spawned a number of scientific research on the technology, security and reliability of the model. It managed to generate a new kind of economy with a market cap of around $ 300 billion at its peak. This article aims to elaborate on the development of blockchain technologies, to discuss the main problems, as well as to show various solutions.
{"title":"Bitcoin: Evolution of Blockchain Technology","authors":"Y. Tomov","doi":"10.1109/ET.2019.8878322","DOIUrl":"https://doi.org/10.1109/ET.2019.8878322","url":null,"abstract":"In the past few years, blockchain thechnologies have sparked a lot of interest in the scientific and businness communities. The working Bitcoin blockchain has spawned a number of scientific research on the technology, security and reliability of the model. It managed to generate a new kind of economy with a market cap of around $ 300 billion at its peak. This article aims to elaborate on the development of blockchain technologies, to discuss the main problems, as well as to show various solutions.","PeriodicalId":306452,"journal":{"name":"2019 IEEE XXVIII International Scientific Conference Electronics (ET)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122879150","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
M. Marinov, Borislav Ganev, N. Djermanova, T. Tashev
The paper presents the noise analysis of different sensor types using Allan Variance (AV). Compared to the conventional variance that assesses the variation around the mean value of the aggregate data surveyed, AV estimates variations by averaging measurements for different periods. This approach often leads to the possibility of directly distinguishing the different noise types and to better convergence of the process of assessing their levels. An important advantage of this method is that there is no need for any further transformations. According to IEEE recommendations, the AV approach is the preferred method for identifying stochastic error and for determining the type of noise in different types of inertial sensors. The purpose of this work is to study the applicability of the AV analysis method for efficient noise analysis for other types of sensors such as CO2 and MEMS pressure sensors.
{"title":"Analysis of Sensors Noise Performance Using Allan Deviation","authors":"M. Marinov, Borislav Ganev, N. Djermanova, T. Tashev","doi":"10.1109/ET.2019.8878552","DOIUrl":"https://doi.org/10.1109/ET.2019.8878552","url":null,"abstract":"The paper presents the noise analysis of different sensor types using Allan Variance (AV). Compared to the conventional variance that assesses the variation around the mean value of the aggregate data surveyed, AV estimates variations by averaging measurements for different periods. This approach often leads to the possibility of directly distinguishing the different noise types and to better convergence of the process of assessing their levels. An important advantage of this method is that there is no need for any further transformations. According to IEEE recommendations, the AV approach is the preferred method for identifying stochastic error and for determining the type of noise in different types of inertial sensors. The purpose of this work is to study the applicability of the AV analysis method for efficient noise analysis for other types of sensors such as CO2 and MEMS pressure sensors.","PeriodicalId":306452,"journal":{"name":"2019 IEEE XXVIII International Scientific Conference Electronics (ET)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125769427","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The main purpose of this research is to investigate the applicability of multi-color photodetectors for controlling the spectral distribution of LED lighting. Spectral sensitivity of various sensors in the visible region was investigated. An assessment of the possibility to control and adjust the light output of the lighting equipment in relatively narrow spectral zones has been made. The obtained results provide non-standard practical guidelines for feedback and controlling the light flow characteristics for different specialized applications.
{"title":"Investigation of photodetectors’ characteristics and assessment of their applicability for control the spectral distribution of LED luminaire light flux","authors":"P. Mashkov, R. Kandilarov, H. Beloev, B. Gyoch","doi":"10.1109/ET.2019.8878621","DOIUrl":"https://doi.org/10.1109/ET.2019.8878621","url":null,"abstract":"The main purpose of this research is to investigate the applicability of multi-color photodetectors for controlling the spectral distribution of LED lighting. Spectral sensitivity of various sensors in the visible region was investigated. An assessment of the possibility to control and adjust the light output of the lighting equipment in relatively narrow spectral zones has been made. The obtained results provide non-standard practical guidelines for feedback and controlling the light flow characteristics for different specialized applications.","PeriodicalId":306452,"journal":{"name":"2019 IEEE XXVIII International Scientific Conference Electronics (ET)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121991646","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This paper presents a basic current amplifier block, defines its performance parameters and describes some design approaches to optimize them. Several versions of the amplifier are designed and compared using 32nm CMOS technology. The goal of the comparison is to study how different approaches for reducing of the input impedance affects the other amplifier parameters: bandwidth, output impedance, nonlinearity.
{"title":"Design Approaches for Reducing the Input Impedance of CMOS Current Amplifier","authors":"Simeon Dimitrov Kostadinov","doi":"10.1109/ET.2019.8878647","DOIUrl":"https://doi.org/10.1109/ET.2019.8878647","url":null,"abstract":"This paper presents a basic current amplifier block, defines its performance parameters and describes some design approaches to optimize them. Several versions of the amplifier are designed and compared using 32nm CMOS technology. The goal of the comparison is to study how different approaches for reducing of the input impedance affects the other amplifier parameters: bandwidth, output impedance, nonlinearity.","PeriodicalId":306452,"journal":{"name":"2019 IEEE XXVIII International Scientific Conference Electronics (ET)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124465757","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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