CONTENTS of PROCEEDINGS

ELECTRONICS 1998

Book 1 (in English)

Shoikova E, Innovations in Bulgarian Higher Education in Electronics

5

Dotsinsky I., A. Dos Santos, Nature and Cancellation of Stimulus Artefact in Motor - Sensory Evoked Potentials - an Overview

14

Andreev B., J.Kolev, Effective Calculation of Optimal Segmentation of Speech Data for VQ-Based Hidden Markov Models

24

Woerd A., M. Bais, L. Jong, A. Roermund, Self-Sustaining Power Supplies for Low-power Electronics

30

Gospodinova M., B. Nikolova, R. Radonov, M. Hristov, Methodology for Custom Analog Monolithic Block Design in CADENCE Environment

49

Jakimovski G., S. Bogdanova, On the Representation of Planar Curves Using Wavelet Transform

55

Jong P., G. Meijer, An Accurate Pressure-Transducer Interface for Temperatures up to 275C

60

Kerezov A., R. Ivanov, Resistive Measurement in the mΩ Range with Low Level Signal using the Universal Transducer Interface (UTI)

71

Kostov M., M. Bogdanov, Chen and Lees Algorithm for the Design of QMF Banks in the Frequency Domain: Alternative Realization

76

Li X., G.Meijer, A Low-Cost and Accurate Interface for Voltage-Generating Sensors

82

Marinov M.,S.Hecht,C.Schilling, Active Prevention of Biofouling of Microsensors Surface-Practice in Microsystems and Sensor Education

87

Mitrovski Cv., PC Interface for Gamma Camera Realized with Dio Card

93

Mitrovski Cv., L. Kocarev, Chaotic Encryption Algorithms Based on Modified Digital Filter Structures

99

Mihov G., A Modulo N+1/2 Divider

105

Nicula D., Fl.Sandu, C.Gerigan, Hardware Multiplier Design - One Day from the Idea to the Implementation

111

Ovcharov St., M. Bogdanov, Energy Profiler Software - Architecture and Implementation

117

Reitsma G., P. van der Berg, Al. Woerd, Improvement of the Calculation Accuracy in EM Problems by Preventing Aliasing Errors in the Numerical Calculation

122

Sandu F., D. Nicula, P. Ogrutan, Implementation for a Virtual Electronics Laboratory

133

Sinioros P., A.Krusteva, M.Dimitrov, M.Ivanov, M.Ivanova, Combined Analysis of the High-Frequency Generator and the Working Capacitor for Dielectric Heating

139

Taskovski D., M. Bogdanov, S. Bogdanova, Image Compression Using NPR Filter Banks

144

Thijssen A., H. Vink, Twos Complement Arithmetic

150

Zerbe V., U. Freund, P. Solanti, Towards Animated Executable Specifications for Satellite Systems

157

 

 

Book 2 (in English)

 

Christov I., I. Daskalov, Filtering of Electromyogram Artefacts from the Electrocardiogram

5

 

Deneva M., M. Nenchev, R. Barbe, J. C. Keller, A New Injection Locking Ring Laser Amplifier of a Periodically Modulated Laser Light Using an Opposite Second Injection

11

 

Dotsinsky I., I. Christov, Mains Interference Subtraction from ECG in Case of Accompanying Tremor

16

 

Dotsinsky I., I. Daskalov, I. Iliev, Detection of Peripheral ECG Electrodes Misplacement

21

 

Al Hatib F., I. Daskalov, Asthma Attacks Monitoring by Electrical Impedance

27

 

Iliev G., M. Momchedjikov, O. Bumbarov, N. Nedev, Restoration of Pulse Noise Deteriorated Audio Signals

33

 

Ivanova T., Pl.Kostov, S.Sapunova, I.Dandolov, First Auto-mated Facility for Plant Growth Experiments in Space Research

39

 

Jekova E., Current Source for Bioelectrical Impedance Measurements

45

 

Kadrev V.,R.Goleva, Analyses of Correlation Between Cell Delay and Loss in ATM Multiplex with Varying Queue Length

51

 

Manoilov P., G. Kouzmanov, T. Stefanov, Vl. Momtchilova, A. Popov, Two Approaches in One for a Quick and Efficient Design of Low Area Custom Microprocessor Cores. Development of the Ims8NI Core via VHDL and Logic-Synthesis

57

 

Mollova G., Digital Filters Design with Arbitrary Magnitude and Phase Specifications

65

 

Petrova G., Improvement of Common Mode Rejection Ratio in Bioimpedance Measurement Using Differential Synchronous Demodulation

71

 

Popov A., E.Manolov, A CMOS Schmitt Trigger with Current Controllable Voltage Threshold and Dynamic Hysteresis

77

 

Popov E., A New Unified Approach Towards the Analysis of Semiconductor RLC Inverters

83

 

Popov E., Generalized Characteristics of Semiconductor RLC Inverters

91

 

Rashkov V., Optimum Processing of Satellite Navigation Signals with Time Delays Separation

99

 

Rashkov V., Accuracy Characteristics of Satellite Navigation System with Multiplex Synchronisation

105

 

Savov V., T. Todorov, Zh. Georgiev, Limit Cycles in the Van der Pol-Duffing Equation

111

 

Tchoumatchenko V., T. Vassileva, Rapid Prototyping Methodology in ASIC Design Education

117

Vassileva T., V. Tchoumatchenko, M. Mladenov, I.Astinov, WWW Based Virtual SPICE Simulator

123

Videkov V., A. Andonova, Influence of Topology on Reliability of Thin Film Resistors

129

Spasov G., Sl.Tabakov, P.Trindev, G.Petrova, Determination of Main Parameters for Development of Picture Archiving and Communication Systems in Hospital

134

Arnaudov D., J. Peichev, B. Blajev, A Methodology of Organizing the Data Base Archive Information

140

Nenov G., I.Georgieva, Influence of Delay-Free-Loop Elimination on the Transfer Function Sensitivity of Digital Filters

146

Videkov V., M.Mitev, V.Manoev, Hybrid IC High Voltage Power Supply

152

Velichkov G., R. Karov, Perspective to Control of Three-Phase Electrical Motors with Digital Signal Processors - DSP

157

Karov R., Sv. Ivanov, Inverters with Reverse Diodes in Frequency Multiplication Mode

165

Hinov N., N. Gradinarov, Analysis of Series RLC Inverters with Reverse Diodes, Working in Aperiodical Mode

171

Gradinarov N.,N.Hinov, Analysis of Series RLC Inverters with Reverse Diodes, Working in

177

Gradinarov N.,N.Hinov, Load characteristics of Series RLC Inverters with Reverse Diodes, Working in Aperiodical Mode

183

Ganchev T., J. Kolev, Researches for Improvement and Development of Low-Bit-Rate Speech Coding Systems

187

Todorov P., V.Todorova, Analog Functional Converters Based on Piezotransforming Elements with Linear Driving

193

Petrova P., V.Todorova, Simulation of Static Characteristics of NOR TTL Integrated Logic Elements with PSPICE

200

Petrova P., Double Transistor PSPICE Model of a Single Transistor

206

Alexandrov A., Theoretical-experimental Investigation of Galvanomagnetic Converter of Linear movement

211

Alexandrov A., P.Todorov, Galvanomagnetic Converter for Electrical Current Measurement

217

., .,

222

Tuliev N., P. Avramov, Universal School Device

228

 

Book 3 (in Bulgarian)

Hristov M., V. Mladenov, I. Bakalski, VLSI Implementation of Cellular Neural Network in CADENCE Environment

9

Ruseva J., St. Belev, Sv. Todorova, D. Grigorova, An Application of Logo! and Logo!Soft in Education

15

Petrov B, I.Rouskova, A Way for Improving Students Motivation During their Electronic Engineering Education

21

Boyanov B., E. Todorov, Direct Digital Synthesis of Sine Wave Based on Digital Signal Processor

27

Boyanov B., E. Todorov, Synthesis of Random Binary Signals by Genetic Algorithm Optimisation

33

Mitev P., A. Angelova, Application of Software System for Acoustic Analysis for Examination of Laryngeal Cancer

39

Stambolieva K, T.Racheva, K.Kostadinov, Stabilografic Platform with posicion Sensitive Photodetector

45

Stambolieva K, V.Grigorova, Quantitative Analysis of Stabilografic signal

51

Grigorova D., Sv. Stoyanov, Some Aspects of Internet/ Intranet Distance Education

57

Dimov V., Modelling Installation for Research of the Radiation Protective Properties of Materials in the Training

63

Shoikova E., D. Kolev, WEB-Based Distance Delivery Learning Platform. Specification and Modelling

68

Shoikova E., I. Pandiev, Multilingual ECAD Glossary - Design and Prototyping

75

Borogov N., Design of Two-Dimensional IIR Digital Filters with Circularly Symmetrical Amplitude Characteristics using Complex Coefficient Spectral Transformation

83

Christov Ch., N. Stoytcheva, M.Semova, Reliability and Safety Analysis of Dynamic Redundant System

89

Gishin St., R. Ivanov, Microprocessor Management of Electrotechnological Processes

95

Stefanova. B. Koen, B. Petrov, High Accuracy Analog-Digital Logarithmic AND/OR Exponential Converter with Microprocessor

101

Ovcharov St., St. Vichev, V. Velikov, P. Jakimov, Protection Relays Static and Dynamic Testing

108

Ilarionov R., I. Simeonov, Functional Controller for Primary Converters Information Processing

114

Dimitrov I, G. Mihov, A Structure of Microprocessor Based System for Discrete Manufacture Controlling

118

Djamyikov T., M.Marinov, System for Simulation and Measurement with Integrated Sensors

124

Todorov D., Measuring Instrument of the Real Relative Permeability for Toroidal Ferrite Core

130

Nikolova B., M. Gospodinova, Capabilities for Automated Design of CMOS Integrated Circuits in CADENCE and Design Centre Environments

136

Stoyanov I., B. Nikolova, Design and Investigation of CMOS Current Mirrors Aided by CADENCE and Design Centre Integrated Environments

142

Stoyanov I., G. Nikolov, Electronic Devices Measurement Methodology

148

Kavalov D., RTL and Behavioural Descriptions in Synthesising Processor Modules Using SYNOPSYSs VDHL

154

Goranov P., M. Hristov, M. Goranova, A. Trifonov, A Controlled Sinusoidal Pulse-width Modulated Signals Generation Method

160

Gichev T., R. Angelova, Comparing the Methods of Theoretical Analysis of the Instantaneous Processes in Electrical Engineering

166

Koichev K., S.Sadinov, Noise Estimate in Cable TV Line

172

Koichev K., S.Sadinov, About One Possible Way of Modelling a Reference Signal for Time and Frequency

178

Zhelezov O., An Signal Classification Method, Based on Non-Linear Transformation of its Spectrum

184

Petrova P., ARC Time(-D) Petri nets

190

Petrova P., Time Flow-Related Petri Nets a Dual Approach

196

Yudov D, J. Batchvarov, The Autonomous Inverter Like a Welding Source

202

Yudov D, J. Batchvarov, A DC/DC Converter with Improved Switching Characteristics

208

Dimitrov M., P. Mintchev, St. Balinov, Finite Element Analysis of Induction Heaters for Ferromagnetic Details Using Magnetic Vector Potential and Impedance Boundary Conditions

214

Dimitrov M., P. Mintchev, G. Kanov, V. Jotev, Three Dimensional Numerical Analysis of the Electromagnetic Field in a Device for Continuous High Frequency Welding of Tubes

220

Ivanov P., D. Aleksiev, R. G. Ivanova, Projecting of Resonance Inverter with Serial Vibrating Circle

226