Number 1

Electronic Medical Equipment
Electronic Systems in Measurement and Control
Embedded Systems
Quantum and Nuclear Electronics

Number 2

Circuits and Systems
Education in Electronics
Micro- and nanoelectronics
Power Electronics
Quality and Reliability in Electronics
Technologies in Electronics

Number 1- Electronic Medical Equipment, Electronic Systems in Measurement and Control, Embedded Systems, Quantum and Nuclear Electronics
Popov A., Dynamic Approaches to Mixed – Signal Design	3
Electronic Medical Equipment	top
Mihov G., I. Dotsinsky, Ch. Levkov, R. Ivanov, Generalised Subtraction Procedure for Removing Power-Line Interference from ECG: Case of Powerline Frequency Deviation	15
Levkov Ch., Sl. Mihov, G. Mihov, Algorithm for Optimal Linear Transformation of 12 Standard Leads for Emphasizing Difference between Typical and Atypical QRS Complexes	20
Jekova I., V. Krasteva, T. Dobreva, N. Mudrov, Zh. Kostov, J. Didon,Cardio Compression Control Device	24
Iliev I., S. Tabakov, E. Dimitrov, Portable Telemedicine System for High-risk Patients	28
Manoeva M., S. Tabakov, I. Iliev, PatRis – Software Tool Applicable in Monitoring Systems for Patients at Risk	31
Shopov M., N. Kakanakov, G. Spasov, Distributed System for Monitoring of Physiological Parameters in Web-based Personal Health Systems	35
Shopov M.,N. Kakanakov, G. Petrova, Profile-based Protocol for Data Interactions in Body Sensor Networks	39
ChakarovV., V. Krasteva, Automatic Analysis of Event-related Potential Components	43
Dobrev D., T. Neycheva, N. Mudrov, High-Q Comb Filter for Mains Interference Suppression	47
Dobrev D., T. Neycheva, N. Mudrov, Simple High-Q Comb Filter for Mains Interference and Baseline Drift Suppression	50
NenovaB., I. Iliev, Online Digital Filters Applicable to Fast Pulse Wave Detection	53
NenovaB., I. Iliev, Non-Invasive Methods of Peripheral Pulse Detection: Advantages and Disadvantages	57
PuriG., S. Tabakov, Adaptive Procedure for ECG Baseline Wandering Suppression	61
Embedded Systems	top
Mladenov T., S. Nooshabadi, K. Kim, Hardware Accelerator for Raptor Decoder	64
Machan L., P. Steffan, The Modern System for Analyzing and Detecting Lead in Solders	68
Dyankov I.,Principles of Indoor Localization and Method for RSSI Measurement	71
DilovK., E. Dimitrov, Study of OSEK OS Possibilities for Usage in Railway Electronic Diagnostic Systems	75
Dilov K., E. Dimitrov, Implementation of OSEK/VDX Based OS for Usage in Railway Diagnostic System	79
Pashev A., P. Yakimov, Design and Investigation of a WEB Based Temperature Sensor	83
Lubomirov Sl., Digital Relay Protection with LPC 2124 General Purpose I/O Controller for External Communication	87
Quantum and Nuclear Electronics	top
Wallerand J., Th. Bhadr, M. Himbert, M. Nenchev, Two-wavelength Laser Interferometry with a Single Two-wavelength Lasers	91
Melikyan V., A. Hovsepyan, K. Vardanyan, Design Automation Method for Total Ionization Dose Tolerant Integrated Circuits	95
Mitev G., M. Mitev, L. Tsankov, An Advanced Method and Circuit for RLC Shaping of NaI (Tl) Scintillation Detector Signals	97
Mitev G., Specifics of Using Current Mirrors for High-side Current Measurements in Detector Power Supplies	101
Electronic Systems in Measurement and Control	top
Ye J., G.C. M. Meijer, Dynamic Offset Canceling Technique Applied in the Universal Transducer Interface	105
GuoX., St. Nihtianov, A Charge-transfer Method and SC Circuit for Measuring Capacitors with One Floating Electrode	109
Schieveen J., R. Yang, St. Nihtianov, J. Spronck, Control System for High-Precision Thermal Actuation	113
Xia Sh., J. Schieveen, St. Nihtianov, J. Spronck, High-Resolution Low-Latency Capacitive Displacement Sensor	117
Xia Sh., St. Nihtianov, A New Approach to High-Speed High-Resolution Capacitive Ratio Measurement	121
Ivanov R. V., T. Djamiykov, P. Yakimov, Possibilities for Electric Energy Consumption Distant Reading System Organization	125
Ribov B., St. Dimitrov, I. Petrushev, T. Atanasova, Electronic Energy Meter Suitable for Energy Efficiency Analysis	129
Vesely A., J. Vanek, J. Dolensky, M. Kafka, Transillumination Photoluminescence	132
Yaryshev S., I. Konyakhin, Al. Timofeev, T. Djamiykov, Universal Opto-electronic Measuring Modules in Distributed Measuring Systems	135
Mardirossian G., Z. Zhekov, Noise Measurement in Electronic-optic Transformers	138
Koleva E., Development of Optocouplers with Bolometer Photodetectors	140
Koleva E., I. Kolev, Development of Optocouplers with Pyroelement Photodetector	144
Nikolov G., St. Vutev, B. Nikolova, Magnetic Fields Measurement with AMR Sensors	148
Logofetova-Trifonova P., M. Marinov, G. Nikolov, Methodology for Static Parameters Testing of Magnetic Field Sensors	152
Zhelyazkov G., M. Mitev, Monitoring Earth's Magnetic Field Using Magnetoresistive Sensor ZMY20M	156
Djamiykov T., M. Marinov, M. Milushev, G. Nikolov, Sensors Characterization System for Educational Laboratories	160
Marinov M., G. Nikolov, P. Logofetova-Trifonova, Intelligent Sensor System for Air Quality Monitoring	164
Sapundjiev P., Air Humidity Measurement Using The Psychrometric Method	168
Molnar K., M. Vlcek, Evaluation of Bandwidth Constraint Models for MPLS Networks	172
Molnar K., M. Vlcek, Evaluation of Bandwidth Constraint Models for MPLS Networks	176
Shoshkov T., St. Jilov, G. Mihov, V. Gunev, Intelligent Sensor for Weight Measuring, Qualifying and Inspecting	180
Nikolov G., P. Yakimov, Virtual Three Phase Power Transducer	184
Nikolova B., G. Nikolov, M. Todorov, Curve Fitting of Sensors’ Characteristics	188
Vladimirov Kr., D. Todorov, Automate the Processing and Analysis of Results of Parametric Measurements	192
Milushev M., T. Djamiykov, Design of the Modular Control Architecture for a Walking Robot	195
Nikovski Pl., I. Maslinkov, Analysis of an Equivalent CCPE Connection Diagram of the One-port Circuit by Square-wave Voltage	197
Stoyanov P., S. Ivanova, V. Markov, N. Tchilyanski, The Tends in Taking Remote Earth Observation from Space	200
Radoyska P., A Deterministic Approach for Diagnosis Test Generation	204
Radoyska P., A Deterministic Approach for Diagnosis Test Generation - Further Optimizations	208
Mashkov P., T.Pencheva, B. Gyoch, Electronic Control of Emitters’ Operation for Infrared Welding of Plastic Details	212
Number 2-Circuits and Systems, Education in Electronics, Micro- and nanoelectronics, Power Electronics, Quality and Reliability in Electronics, Technologies in Electronics	top
Education in Electronics	top
Shoikova E., Modelling Specifications for Competence	3
Shoikova E., M. Krumova, Review of Competence Based Education Practices	8
Shoikova E., M. Krumova, Researching Competency Models	14
Prasek J., Z. Pytlicek, J. Hubalek, Student Workplace for Gas Sensing Demonstration	19
Adamek M., J. Prasek, J. Cieslar, The Sensor Technic Workplace for Internet Learning	22
Adamek M., J. Prasek, M. Nicak, New Trends of BGA Soldering in Education	26
Vasileva T., V. Tchoumatchenko, Knowledge Practices Environment and Tools for Collaborative Knowledge Creation	29
TchoumatchenkoV., T. Vasileva, Ontology Design for Visual Modeling Languages	33
VidekovV., R. Radonov, Improved Data Visualisation in the “e-Management” System	37
Lyubenova T., D. Lyubenov, J. Dimitrov, Client – Server System for Control of Virtual Instruments as Web Based Teaching Tools	40
Iovev A., Yakimov P., Tuliev N., S. Ovcharov, E. Balkanska, Student Workplace for PLC Programming Training	44
Hadzhidimov I., V. Pavlov, Education on Solar Potential Estimation at EUC “Energy-Nature-Balkan”, TU-Varna	48
Stoyanova L., Database Structure of the Information System for Graduation Works Allocation in the Technology School “Electronic Systems”	52
Kostadinov A., Using HDL Translators in VLSI Design Laboratory Exercises	56
Circuits and Systems	top
Sztojanov I., V. Voinea, D. Crisan, C. Popescu-Mina, Fractal Technology Based Image Processing in Botany and Biology	60
Alaverdyan R., Minimum Cut Algorithm for Hypergraph	64
Mihov Sl., R. Ivanov, A. Popov, Denoising Speech Signals by Wavelet Transform	69
ProkopR., Vl. Musil, Current Conveyor CCII as the Most Versatile Analog Circuit Building Block	73
VrbaA., R. Prokop, Fully Integrated OTA-C Filter Tunable by Controlled Transconductance Parameter	77
Gadjeva E., N. Gadzhev, Yield Enhancement Approach Using Monte Carlo Simulation in SPICE	80
Gadjeva E., E. Dimitrova, D. Shikalanov, A Model-Based Approach to Automated Diagnosis of Multiple Parametric Faults	84
Durev Vl., E. Gadjeva, Implementation of Geometry Dependent Planar Inductor and Transformer Models in Cadence PSpice	88
Pandiev I., T. Todorov, P. Yakimov, D. Doychev, A Practical Approach to Design and Analysis Sinusoidal Oscillators	92
Pandiev I., T. Todorov, P. Yakimov, D. Doychev, Current Conveyor Based Sinusoidal Oscillators Employing Quartz Crystal Resonators Behaving as Inductors	96
Asparuhova K., T. Djamijkov, Investigation of Optoelectronic Circuits	100
Petrova I., B. Mihaylov, S. Mihov, Development of Evaluation Kit Extension Modules for Analog-to-Digital and Digital-to-Analog Conversion	103
Minev P., V. Kukenska, The Virtex-5 Routing and Logic Architecture	107
Stefanova St., Application of Elman Recurrent Neural Network for Modeling of IIR Digital Filter	111
Power Electronics	top
Spirov D., Comparison of PWM Strategies for Inverter-fed Induction Motor	115
Kunov G., G. Gigov, M. Metodiev, PSpice Investigation of Bridge Transistor CFI Supplied from Hysteresis Current Controlled BUCK DC-DC Regulator	119
Popov E., L.Pindeva, S. Hristov, Three – Dimensional Generalized Characteristics of Autonomous Voltage – Fed R L C Inverters	123
Veselinov Vl., D. Grigorov, Methods for Determining the Available Working Resources of Power Electronic Devices	127
Bankov N., Al. Vuchev, G. Terziyski, Operating Modes of a Series-Parallel Resonant DC/DC converter	129
Nikolov G., Comparative Study of Welding Transformers Based on Nanocrystalline and Ferrite Cores	133
Valchev V., Pl. Yankov, A. Marinov, PMSM/BLDC as Generators in Renewable Energy Conversion Systems	137
Micro- and nanoelectronics	top
Priem Fr., J. Calu, R. Craemer, Towards the Integration of Course Modules of Different European Institutions of Higher Education into a Multimedia Learning Platform	141
Vitanov St., V.Palankovski, Influence of the Gate Recess on the Performance of Enhancement-Mode AlGaN/GaN HEMTs	144
Verslype S., E. Blomme, T. Cool, R. Craemer, Fr.Loret,J.Peuteman, J. Vandenbussche, Cross-correlation Based Ultrasonic Multi Channel Quality Control Using a Virtex 5 SX50T Board	148
Rusev R., G. Angelov, B. Atanasov, T. Takov, M. Hristov, Comparison of Branching Hydrogen Bonding Networks with Microelectronic Devices	152
Rusev R., G. Angelov, T. Takov, M. Hristov, Biocircuit for Signal Modulation Based on Hydrogen Bonding Network	155
Petkov I., G. Angelov, I. Panayotov, M. Hristov, Tuning Verilog-A PSP Model to a Specific Technology	159
Panayotov I., T. Stoiadinova, K. Filipova, V. Mladenov, Th. Ortlepp, Creating VHDL Descriptions of Asynchronous Dual-rail RSFQ Logic	163
Brusev T., M. Hristov, Power Losses in Monolithic Buck DC-DC Converter Designed on CMOS 0.35 µm Technology	166
Strijkova V., R. Kazakov, J. Assa, E.Spassova, G. Danev, High Temperature Stable Polymer Layers-Obtaining by Vacuum Deposition Methods	170
DyuzovB., E. Manolov, Design of Automotive LED Driver Control Circuit	174
Manolov E., F.Koparanov, M. Tzanov, Modeling the Behavior of RLC Circuits Using FPAA	178
Manolov E., M. Tzanov, F.Koparanov, FPAA Implementation and Investigation of Analog Neurons	182
Atanasova I., A. Pangev, A 0.35µm CMOS Linear Voltage Regulator with High Voltage Power Supply	186
Todorova R., T. Takov, A. Pangev, Bandgap Voltage Reference – Simulations in Cadence and Layout Design	190
Yordanov R., MCM Design Using CADENCE	194
Draganov V., G. Angelov, K. Asparuhova, M. Hristov, Verilog-A Formulation of Godfrey-Lazzaro Model for Simulations in Cadence CAD System	198
Technologies in Electronics	top
Dolensky J., J. Vanek, A.Vesely, and Jiri Kazelle, Detection of Microplasma in Solar Cell	202
Prasek J., M. Adamek, M. Cupal, Planar Electrode Topography Optimization for Electrochemical Sensor	205
Drinovsky J., P. Steffan, P. Barath, Measurement of Electromagnetic Shielding Efficiency of Composite Materials with Carbon Fibers	209
Dimov D., I. Jivkov, E. Spassova, J. Assa, P. Dineff , G. Danev, Ion-Assisted Processes – a Novel Tool for Accomplishing of Physical Deposition of Organic Layers	212
Aleksandrova M., N. Nikolov, Sv. Andreev, G. Bodurov, Investigation of Spray Coating as a Deposition Technique for Fabrication of Multilayer Organic Structures	215
Ivanova M., M. Nakova, I. Ivanov, K. Denishev, Investigation and Analysis of Angular Gyroscope Microelectromechanical Systems	219
Ivanova M., M. Nakova, I. Ivanov, K. Denishev, Investigation and Analysis of Gyroscope MEMS Design Solutions for Automotive Applications	223
Hristov M., St. Filipov, Kr. Denishev, I. Uzunov, Vl. Grozdanov, D. Gaydazhiev, Design and Simulation of MEMS Vertical Accelerometer	227
Hristov M., St. Ruskov, Kr. Denishev, I. Uzunov, Vl.Grozdanov and D. Gaydazhiev, Design and simulation of Horizontal Accelerometers	230
Vulcheva E., I. Ivanov, M. Hristov, Vl. Grozdanov, D. Gaydazhiev, Kr. Denishev, Methods for Real Time Measurement of Y-Displacement of the MEMS Horizontal Thermal Actuator	234
Hristov M., Vl. Grozdanov, I. Ivanov, D. Gaydazhiev, Kr. Denishev, Design and Analysis of MEMS Variable Capacitor Driven by Vertical Electro-thermal Actuators	237
Denishev Kr., St. Cvetkov, Design and Investigation of RF MEMS Switch	240
Rahnev P., D. Parashkevov, Manufacturing of Nichrome Thin Film Potentiometer	244
Parashkevov D., Some Consideration to Uncertainties by Defining the Resistance Value of a Thin Film Resistor	246
Dobrikov G. M., G. H. Dobrikov, St.Boyadzhiev, Y. Kotani, Y. Matsumura, R. Yordanov, Investigation of the Fluorescent Quantum Efficiency of New Low-Molecular Weight Compounds	249
Zhivkov I., V., Siderov, D. Dimov, R. Kazacov, G. H. Dobrikov, S. Dimova, Ch. Jossifov, Electrophoretic Deposition of Thin Poly [2-methoxy-5-(2'-ethyl-hexyloxy)-1,4-phenylene vinylene] Thin Films	253
Kolev D., V. Todorova, Limitations of One Dimension Modeling for the Resonance Piezoelectric Array Sensors	257
Quality and Reliability in Electronics	top
Vanek J.,M. Lunak, Z. Chobola, J. Dolensky, A. Vesely, Evaluating of the Quality of New Solar Cells Designed for Concentrator Systems Application by Noise Spectroscopy	261
Dimitrov K., D. Nurkov, Diagnostic Reasoning and Reliability Analysis in Sensor Button Electronic System via Petri Nets	264
Andonova A., R. Yordanov, Reliability Prediction of HIC and MCM	268