CONTENTS of PROCEEDINGS

ELECTRONICS 1997

 

BOOK 1 (in English)

Nenchev M., Development of Laser Sources Capable of Emitting Nanosecond Pulses with Controlled Length, Shape and Wavelength

7

Hristov M., CAD in Electronics and Microelectronics Education

40

ELECTRONIC SYSTEMS IN MEASUREMENT AND CONTROL

Meijer G., Multi-Electrode Capacitive Sensors

57

Nihtianov St., G.Meijer, Non-Destructive Simultaneous Food-Sterility and Package-Quality Testing of Aseptically Packed Food Products with Impedance Measurements

66

Ivanov R., G.E.M.D.C. Bandara, Performance of MC68HC812A4s specialized Fuzzy instructions in Fuzzy logic programming

73

Altimirski E., R.Ivanov, A.Kerezov, Electronic Water Flow Meter for a Centralized Computer Control Station

79

Zerbe V., D.Alexiev, R.Blume, S.Ouzounov, One Fuzzy Hierarchical Algorithm for Mobile robot Navigation

83

Kerezov A., Precision Weight Scale Without Expensive Analogue Circuits and Voltage Reference

88

Mitev M., V.Manoev, K.Stefanov, P.Petev, D.Vassilev, 2048-Channel System for High Voltage Power Supply

93

Ovcharov St., M.Bogdanov, Investigation of the Amplitude and Phase Errors of Transformer Current to Voltage Converters

97

Ovcharov St., M.Bogdanov, Analysis of the Effect of Negative Resistance Element over the Error of a Compensated Current Transformer Converter

103

Rouskova I., Fuzzy Rules Generation for a Microkernel, Integrated to a Motorola 68HC11 Operating System

109

Petrov B., I.Rouskova, A Microkernel for Multitasking Operation Mode on the Base of Motorola 68HC11 Microcontroller

113

Petrov B., An Investigation on the Possibilities of ADSP-2104 Shared Access to the Synchronized SRAM

119

Petrov B., An Investigation on the Possibilities for Multiprocessor Systems with Motorola MC68HC11 Microcontroller Chip

124

POWER ELECTRONICS

Soran I.F.; I.Sztojanov; S.Pasca, The use of Hybrid Model of the Induction Machine Associated with Static Converters in the Simulation of Electric Drive System

129

Popov E., Computer Simulation of Power Vacuum Tube Oscillators

136

ELECTRONIC MEDICAL EQUIPMENT

Santos A., I.Tashev, I. Dotsinsky, Artefact Suppression of Nerve Evoked Signals Using Adaptive Filtering

145

EDUCATION IN ELECTRONICS

Vassileva T., V.Tchoumatchenko, I.Astinov, P.Amblard, Experience in Using WWW Technologies in Education

151

MICROELECTRONICS

Reczey M., R.Dobay, G.Harsanyi Z.Illyefalvi-Vitez, Electroconducting Polymer Film Based Gas Sensor on Thick Film Substrate

157

Radonov R., M.Hristov, Network Organisation at the Electronics CAD Laboratory

161

Gospodinova-Daltcheva M., Using High Resistively Silicon Substrates as Chip-Carriers for High-Speed Monolithic Integrated Circuits

166

Andonova A., Heat-Resistance Estimation of Digital Hybrid Integrated Circuits

172

MODELLING AND ANALYSIS IN ELECTRONICS

Van der Woerd A.C., A.H.M. van Roermund, Electronic Delay Circuit for Intelligibility Improvements and Acoustic Feedback Prevention of Hearing Aids

177

Sztojanov I., S.Pasca, V.Bota, Methods for Improving the Selectivity of Spectral Analysis and Their Implementation with LabView

183

Thijssen L., Quality Optimisation in Digital Integrated Circuit Design

189

Staykova T., D.Slavov, M.Deneva, M.Nenchev, Improvement of the Generation Characteristics of a Flashlamp - Pumped Dye Laser Using a New Combined Passive Self-Injection Locking Dual-Step Pumping Technique

197

 

Popov A., D.Manova, A Parallel Resistorless CMOS ADC

203

Tchoumatchenko V., T.Vassileva, B.Korchev, A.Guyot, Design of Reusable VHDL Models, TU-Sofia

209

 

BOOK 2 (in Bulgarian)

MODELLING AND ANALYSIS IN ELECTRONICS

Hristov M., V.Hristov, Imitation modelling of the Network Operations at ETHERNET LANs

7

Kojtchev K., P.Petrova, Design of Cable TV Networks

13

Stefanova St., Semi-Infinite Optimization of Recursive Digital Filters

19

Savov V., T.Todorov, Zh. Dimitrov, Mathematical Models for Analyzing two Dimensional Stationary Magnetic Fields

25

Stoyanov I., B.Nikolova, CMOS Invertors Design and Simulation with Design Center and Cadence

31

Nikolova B., CMOS Technology Capabilities for Precision Operational Amplifiers Design

37

Petrova P., Non-Deterministic Models of Ramchandani and Sifakis-Tipe

43

Petrova P., Interval Specifying Possibilities in Place/Transition Design Techniques

49

Popov A., E.Manolov, A High-Speed Transistor-Bridge Track-and-Hold Circuit

55

Krastev Kr., K.Kralev, Vl.Pirgozliev, V. Raitchev, Coordinate Equipment for Cutting PVC Images

61

Krastev Kr., K.Kralev, System for Automatic Setting and Cutting of PVC Images

66

Kolev I., Programmable Photoswitches

72

Arnaudov D., A Methodology for Minimization of the Average Response Time In Databases with a Hierarchical Partially-Inverted Structure

77

ELECTRONIC SYSTEMS IN MEASUREMENT AND CONTROL

Ivanov R., R.Kortensky, Functional Comparison of Some Microcontrollers for Fuzzy Controllers

81

Kortensky R., Method for Shorted Looping of the Fuzzy Rule Base in the Fuzzy Controllers

87

Mihov G., A Digital Frequency Sensitive Phase Detector

93

Nemigenchev I., Vl.Alexiev, A.Gospodinov, Sensor System for Analysis of Gas Medium

99

Ilarionov R., A Possible Approach to Developing LED Displays

103

Pavlikyanov E., J.Rousseva, A Microprocessor System for Control of Pressure Casting Machine with Electromagnetic Forces

108

Simeonov I., An ultrasonic Converter for Level Measuring

112

Dimitrov V., V.Mutkov, An Investigation of an Electronic Module for the Air Velocity Measurement in Stock-Breeding Buildings

118

Mutkov V., V. Dimitrov, I.Evstatiev, An Electronic System for the Basic Microclimate parameters Measurement in Stock-Breeding Buildings

124

Milushev Ml., T.Djamiykov, Experimental Study of Low-Cost Optical Liner Sensor

129

Spasov G., J.Lambrev, Data Field in The Frame of Sublayer Media Access Control in Diffuse Infrared LAN

135

Shkevov R., V.Marinov, System for Tracking and Protection of Satellites Electronics Complexes Against Peak Value in Electric Field Amplitude and Spacecraft Body Potential

141

Shkevov R., Application Limits of the Piezoelectric Accelerometers in Space Microgravity Acceleration Measurement Systems

147

Dinkov E., M.Dinkova, Capacitive Levelmeter

153

Dinkov E., M.Dinkova, Levelmeter Lonvestion Circuit

160

Dinkov E., Stabilized Reference DC Voltage Source

166

Marinov M., V.Galabov, C.Schiling, Investigation of the Behavior of Microsensors by Long Term Exposition of Environmental Influence

170

Avramov P., Zgurev M., Tuliev N., Tzanov M., Manolov E., Koparanov F., Linear Fotosensor Module

176

Avramov P., Tzanov M., Manolov E., Koparanov F., Methods for Measurement of Flat Object Areas

180

 

BOOK 3 (in Bulgarian)

POWER ELECTRONICS

Nemigenchev I., Vl.Alexiev, Investigation of Class E Tuned Power Amplifier

7

Madjarov N., Ah.Ali, Behaviours and Characteristics of Frequency Converters with Dosing of Energy for Electrotechnology (part one - theoretical and computer researches)

13

Todorov T., N.Madjarov, Ah.Ali, Behaviours and Characteristics of Frequency Converters with Dosing of Energy for Electrotechnology (part two - experimental researches)

18

Georgiev P., L.Tihtchev, Directions for Electronic Control of Single-Phase Asynchronous Electric Tractions

23

Georgiev P., St.Stefanov, Microcontroller Inverter for Control of Low-Powered Servodrives

29

Georgiev P., V.Georgiev, On the Application of Spacevector Modulation in the Control by Orientation of the Magnetic Field of a Three-Phase Induction Motor

35

Georgiev V., V.Georgiev, Coordinate Transformation Used in Control Systems for a Three-Phase Induction Motor by Orientation of its Magnetic Field

41

Dimitrov M., P.Minthchev, St.Balinov, Three-Dimensional Edge Element Numerical Analysis of Induction Heaters

46

Dimitrov M., P.Minthchev, Possibilities for Acceleration of the Calculations in Three-Dimensional Numerical Analysis of Inductors with Rectangular cross-section

52

Dimitrov M., P.Minthchev, Choice of Working Frequency in Induction Heating for Solid-State Nitriding of Metals and Alloys

56

Hinov N., N.Gradinarov, Analysis of the Resonance Inverters with Induced Commutation

61

Gradinarov N., N.Hinov, Analysis of the Resonance Inverters with Complex Load

68

Gradinarov N., N.Hinov, Analysis of the Resonance Inverters with Reverse Diodes at Complex Load

74

ELECTRONIC MEDICAL EQUIPMENT

Penchev P., E.Baltov, Clinical and Radiographic Evaluation of Idiopathic Aseptic Necrosis of the Femoral Head

80

Penchev P., A Two-Dimensional Model of a Femoral Head with Implants

87

Kovatchev P., Basic Principles of Magnetic Resonance Tomography

94

EDUCATION IN ELECTRONICS

Mechkov C., Heuristic Presentation of the Negative Feedback Principle

102

Mechkov C., Heuristic Methods for Converting Passive Analogue Devices Into Negative Feedback Active Circuits

109

Grigorova D., L.Slavianova, Multimedia in Foreign Language Teaching

116

Frenski A., St.Stefanova, L.Stoyanova, Education Modern Technologies

122

Ilarionov R., A Computer System for Studying HP-GL and Controlling HP-Plotters

128

MICROELECTRONICS

Ivanchev T., P.Philippov, H.Thust, T.Thelemann, Trimming Technology of a Thick Film Resistors by the Pulse Voltage Method

132

Ivanchev T., P.Philippov, H.Thust, T.Thelemann, Mechanism of Resistance Change by High Voltage Trimming Pulses

138

Videkov V., R.Arnaudov, Effectivity of Automatic Power Supply of Microwave Field Effect Transistors

144

Videcov V., T.Savov, Thermovision Investigation of Thermal Electronic Circuit Loading

149

Videcov V., E.Kozarova, Application of Metal Masks for the Production of Micromechanical Elements

154

Ivantcheva V., Thermodinamic Analysis of Implementing Quadruple Compounds In1-xGxAsyP1-y on InP Base with Gas Epitaxy

159

Bogdanov S., M.Rassovska, Investigation of the Gas Flow in the RIE Chamber on the Etch Rate and the Etch Homogenate

165

Bogdanov S., M.Rassovska, Reactive Ion Etching of Silicon in Different Gas Ambient

171

Rassovska M., P.Philipov, Bogdanov S., Dielectric Layers used in the Technology of AC Plasma Displays

176