CONTENTS of PROCEEDINGS*

ELECTRONICS 1995

 

*The papers are in Bulgarian or in English.

 

BOOK 1

ELECTRONIC SYSTEM FOR RESEARCH

 

Van Roermund A.H.M., Electromagnetic compatibility an overview

7

Ivanov Y., R.Shkevov, St.Chapkunov, Necessary conditions for optimal

space location of a system for noise active attenuation in three-dimensional space

26

Shkevov R., Method for calibration of sensors and systems applied for microgravity acceleration measurements investigation in presence of noises missing signals comparable with measuring value

33

 

Shkevov R.,, V.Marinov, System for tracking of differential crest value signals module in space plasma

39

Angelova-Deneva M., D.Slavov, E.Stoykova, M.Nenchev, New techique for improvement of the efficiency and spectral purity in tunable lasers

45

 

 

INDUSTRIAL ELECTRONICS

 

Nihtianov St., G.Meijer, Non-invasive impedimetric sterility testing of aseptically packaged food products

52

Gavrovski C., L.Arsov, Level control using radioactive source

60

Gavrovski C., T.Dzekov, Detection of ionizing radiation with a standard photo diode

68

Ilarionov R., R.Ivanov, Module microprocessor system for graphic information display

74

Ilarionov R., R.Ivanov, Sample approach by alpha-numerical information large displays design

81

Sladkarov Al., S.Mitov, Microwave detector "Barrier"

88

Karov R., K.Kovatcheva, A distribution of current at a parallel work of links in thyristor resonance inverters

92

 

Karamanski P., A.Dimitrova, Dynamics of the induction heating equipment with thyristor converters

98

 

Toshkov G., Moulding and adjustment of thyristor based current source for electric welding

105

Georgiev A., N.Georgieva, Analyze of stay factor for group equipment in UTS100

111

 

Popov I., D.Judov, K.Atanasov, A length control possibility of light stick in neon lamp

117

Tzonev E., St.Stanev, Ch.Chinov, P.Ivanov, Energetic interrelations in transformer commutation of high power converters

122

Geortchev V., B.Iliev, A compact D.C. motor servo controller using modern electronic components

128

Geortchev V., B.Iliev, E.Gortcheva, Position and velocity servocontroller for low-scale modules for robots and manipulators

135

 

Dimitrov L., R.Kafova, I.Kolev, Application of optrons in schemes for electric power supply

141

Georgiev P., R.Stoytshev, Some special characteristics of the four quadrant power switches at the matrix converter

148

E.Popov, Computerized research and teaching system for power electronic circuits

155

Dinkov E., M.Dinkova, Reserve power source

162

Dinkova M., E.Dinkov, Quasi-resonance buck converter control circuit

166

Petrov A., A possibility research to lock loop a quasi frequency converter used immediate loop

172

 

Petrov A., Analyze and mathematical mould of quasi frequency lock loop converter used immediate loop

179

Georgiev P., A.Petrov, Circuit decision for quasi frequency converter used immediate loop, using the method of digital frequency modeling in result converted current

184

Dinkov E., V.Mollov, M.Dinkova, Sp.Arnaudov, Sp.Naidenov, Modified rectifier control system

191

Mollov V., E.Dinkov, Sp.Arnaudov, P.Dimitrov, Microprocessor system for pump station control

196

 

DATA ACQUISITION

 

Mainalovsky At., Voltage generation for radial scan in the indicators for circular surveilance using the method of Brezenham

202

Sirakov E., G.Evstatiev, Compensation electric characteristics of three-way speaker system

209

Butchvarov D., R.Kristeva, A.Boneva, L.Ivanov, Building of local network set based on one wire data transmission

218

Kortensky R., Method for text information compressing during transfer and storing

224

 

Kolev J., T.Ganchev, Digital speech carrying in low speed canals

229

Kolev J., I.Buliev, T.Ganchev, Speech identify using neuron nets

234

Chikov V., Poli-canal system module for information carrying from frequency sensors by long spare conductors

240

 

BOOK 2

MICROELECTRONICS AND ELECTRONIC COMPONENTS

Velchev N., The diamond based semiconductor circuits

7

Dzekov T., C.Gavrovski, Realization of a current mirror circuit using JFET 's

22

Todorova V., St.Milchev, Principles of primary processing of tactile information depending on the organization of the Ferro piezoelectric tactile array field

32

Abedinov N., N.Nikolov, A humidity influence over fat-layer structure characteristics with polymer sensibility layer

42

Petrov J., B.Nenkova, Investigation of the stability and resistance of technological processes for production of microelectronic items

46

 

Kolev I., Optoelectronic sensors and sensors with optical fiber

52

Marinova G., A statistics mould of FET in ISSI

57

Videkov V., T.Djamiykov, Methodology and analysis of measurement stand for light-conductor sensors

63

Andonov A., E.Ivanova, A.Andonova, Research of modulation way for error compensation in sensor measurement circuit

68

Videkov V., T.Djamyikov, Research of light-conductor emission diagrams for technology manipulators

74

Koutzarov I., V.Dinov, T.Savov, B.Bonchev, EEPROM study and testing

79

Savov T., Analog board for IC tester

85

Todorov T., T.Takov, P.Rahnev, A powerful VDMOS transistor design

91

Savov T., CADSTAR based CMOS&BIPOLAR IC design for the purpuse of education

97

 

CIRCUIT SIMULATION

 

Van der Woerd, W.Serdign, A. van Roermund, Design of Low-Voltage Low-Power Analog integrated Circuits for Hearing Aids

103

Borogov N., Synthesis of complex digital filters with one, two and three unsymmetrical passbands via z-domain frequency transformations

120

Hristov H., N.Stojcheva, A research algorithm and computer modeling of electronic fail-save security

127

Tzekov I., V.Borisov, E.Dimitrova, Modeling of gate circuits (tensor way) - periodic discrete model of converter circuits

134

Tzekov I., V.Borisov, I.Buliev, E.Dimitrova, A simulator for converter circuits (tensor way)

140

Kolev J., D.Kovachev, T.Ganchev, Automatic design using large programmable logical circuits

146

Kolev J., D.Kovachev, An automatic design studding in electronics

152

Georgieva N., I.Popov, A.Georgiev, G.Todorinov, The security problems of light effect controller

157

Hristova P., St.Kolev, Model of photon coupled interrupter module for electronic circuits simulating with the PSPISE package

163

Petrova P., A.Alexandrov, P.Todorov, Collector currents asymmetry effects in two-collector magnetotransistor static model

170

Aleksandrov A., St.Stanev, P.Todorov, Switching operation of dual collector magnetotransistor 2T1M1

176

Panov E., Research into the possibility for controlling the convergence of the solutions in analysis of electronic circuits, using Taylor transform method

181

Panov E., Hr.Patev, D.Zlatanska, Exploration of the possibility for implementation of one resistive model of a powerfull, analog switch for analysis of switched circuits

187

 

Panov E., Hr.Patev, G.Donev, V.Ivanova, Research into a class of reactive one-ports with controlled parameters

193

Kafova R., I.Kolev, L.Dimitrov, A scheme of a three - phase optoelectronic detector with optron 6H2111

199

Bukev Al., G.Krastev, An approach for hardware implementation of digital filters (DF)

203

Popov A., V.Mollov, D.Manova, Switching circuits with a time-domain hysteresis

210

R.Georgiev, Research on the unshielded field of strip-lines

216

Sotirov L., An algorithm for optimal singular adaptive observation of single-input single-output linear stationary discrete systems, with initial state vector estimation

222

 

BOOK 3

ELECTRONIC MEASURING AND CONTROL SYSTEMS

Meijer G., Smart voltage measurement systems and bandgap references

7

Ovcharov St., Application of electronics in electroenergetics

26

Iordanov A., L.Atanasov, Toxic gas concentration monitoring

49

Chikov V., Programmed calibrator for AC and DC voltage in information and measuring system

52

Chikov V., Frequency and period measuring system

57

Dimitrov E., N.Nenov, T.Arsenov, Determination of characteristics of rubber-metal springs and their disposition in the locomotive

61

Ivanov R., D.Palazov, R.Kortensky, Two band microprocessor measure instrument of impulse laser radiation energy

68

Petkov V., Voltage switching device

75

Petkov V., Voltage frequency converter

79

Iliev M., Universal multi-channel system for data collecting and processing-software

82

Iliev M., Universal multi-channel system for data collecting and processing-hardware

90

Psederski St., G.Karabenchev, M.Iliev, Methodology for measurement of the basic characteristics of electronic energy polymeter

96

Karabenchev G., M.Iliev, St.Psederski, Electronic polymeter for measurement of electrical energy parameters

102

Janev J., V.Ivanova, I.Ivanov, Electrodeless fluids conductivity transmitter in DC signal

108

Ivanov I., J.Janev, V.Ivanova, Analog controller for electrical conductivity of fluids

113

Zahariev R., N.Valchkova, Mechatronic information system for analysis of montage operations of robots "SCARA"

119

Simeonov I., Liquid level ultrasonic sensor

128

Markov L., Acquiring high accuracy of the wheat moisture measurement through automatic dosing of the sample

135

Gebov Vl., A.Markowska, A study of the possibility for the process of water dosage at seed moistening

142

Dandorov A., A.Markovska, Valuation of co-ordinate unevenness on optic detectors sensibility

148

Georgiev P., J.Jordanov, Some peculiarities of circuit for controlling of IGBT modules

152

Altimirski E., A.Popova, B.Bonev, Interface for acquisition and computer control of analog and digital signals

158

Ovcharov St., V.Velikov, P.Jakimov, Three phase electronic electro power meter

165

Ivanov R., Measuring of contact resistance with low level signal

170

Bakalski I., Laser beam divergence evaluation using a spatial- frequencies analysis of the near field intensity distribution

176

 

MEDICAL ELECTRONICS

 

Dotsinsky I., I.Christov, I.Daskalov, Electrocardiograms recording of paced patients and during defibrillation

183

Gramatikov B., Electrocardiographic body surface mapping initial experience

190

Michov G., Rejection of non-synchronous mains interference from ECG signals

197

Penhev P., Medical information system for a graphics images in the field of orthopedic

204

Mihov G., Ch.Levkov, Rejection - subtraction filter of mains interference from the ECG

210

Trifonov A., Apparatus for the speed precipitation analysis of erythrocyte

216

Iliev I., Blood pressure measurement by photo electrical way

221

Al Khatib F., Complex bioelectric impedance measurement

227

Mihalkova St., Pl.Kalaijiev, D.Voicheva, Application of computer test systems for neuro-psychic training

234

Aleksiev D., M.Marinov, G.Dakovska, Advice program for diabetes medication using the method of functional insulin treatment

239

Petrova G., G.Spasov, EKG simulator

245

Kechayov T., Electronic system for fast examination of the heart beat

253

Kechayov T., Electronic system with molecular sieve primary converter for concentration estimation of harmful substances in the air

258