Елементи теорії та прилади твердотілої електроніки. – 2002. – №458

Permanent URI for this collectionhttps://ena.lpnu.ua/handle/ntb/42439

Вісник Національного університету «Львівська політехніка»

У Віснику опубліковано результати науково-дослідних робіт професорсько-викладацького складу, аспірантів та докторантів електрофізичного факультету Національного університету “Львівська політехніка”, науковців та викладачів із провідних вищих закладів освіти та академічних інститутів. У Віснику публікуються роботи провідних вчених Республіки Польща та Словаччини. Тематика робіт пов’язана з питаннями теорії фізики напівпровідників та напівпровідникових приладів, теоретичними і практичними проблемами мікроелектроніки та сенсорної техніки. Для викладачів, наукових співробітників, аспірантів, інженерів, студентів.

Вісник Національного університету "Львівська політехніка" : [збірник наукових праць] / Міністерство освіти і науки України, Національний університет "Львівська політехніка. – Львів : Видавництво Національного університету «Львівська політехніка», 2002. – № 458 : Елементи теорії та прилади твердотілої електроніки / відповідальний редактор Я. С. Буджак. – 291 с. : іл.

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About the nature of the main parameters of temperature sensors
(Видавництво Національного університету «Львівська політехніка», 2002) Budjak, Jaroslav; Hotra, Oleksandra; Lviv Polytechnic National University; Lviv State Medical University
The results of study of the nature of sensor materials properties are given in this paper. For study of the nature of conductivity and other kinetic properties of semiconductor materials modern kinetic theory was used. The theory is based on statistical sum of large nonequilibrium ensemble of charge carrier gas particles in semiconductors.
Model of debactericidal ultra-violet radiator with discharge plasma radiated body
(Видавництво Національного університету "Львівська політехніка", 2002) Kozhuhar, Alexander; Chuchman, Ivan; Slezin, Ivan; Lviv Polytechnic National University
Is offered a mathematical model and modelling algorithm of ultra-violet radiators attached to designing sterilization al and debactericidal devices with cylindrical discharge-plasma radiated bodies, that provides is thrashed a level and evenness of working zone irradiation
Титульний аркуш до Вісника «Елементи теорії та прилади твердотілої електроніки» № 458
(Видавництво Національного університету "Львівська політехніка", 2002)
Optical, elastical and piezooptical properties of the β-BaB2O4 and Li2B4O7 borate crystals
(Видавництво Національного університету «Львівська політехніка», 2002) Adamiv, V. T.; Burak, Ya. V.; Martynyuk-Lototska, I. Yu.; Kostyrko, M. E.; Vlokh, R. O.; Romanyuk, G. M.; Shranz, W.; Institute of the Physical Optics, Ukraine; Lviv Polytechnic National University; Institut fur Experimental Physic, Austria
The optical, elastic and piezooptical properties of the borate crystals have been investigated. The dispersions of the indexes refraction of the Li2B4O7 crystals have been determinated in wavelength range 350 - 650 nm. The results of the measurement velocity of the longitudinal and transverse ultrasonic waves on borate crystals are presented. Using ultrasonic velocity measurements the components of the elastic matrix Cmn of these crystals have been determined. Using the determined values of the elastooptical tensor components the acoustooptical quality M2 of β-BaB2O4 crystals has been calculated
Epitaxial garnet films for microwave electronics
(Видавництво Національного університету «Львівська політехніка», 2002) Yushchuk, Stepan; Yuryev, Sergij; Lviv Polytechnic National University
The technology of growth the substituted yttrium-iron monocrystalline garnet films (YIG) on the monocrystalline substrates of the gallium-gadolinium garnet (GGG) with the orientation (111) by the isotermal dipping method of liquid phase epitaxy was carried out. The penetration of La3+ ions into structure of YIG leads to decreasing of lattice mithmatch between the ferrite film and substrate .The control of growth speed of the epitaxial films on the whole process of growing and application of the compulsory mixing of melt-solution of oxides enables to receive the films with homogeneous thickness and small magnetic losses. The penetration into the YIG structure films the non-magnetic Ga3+ and La3+ ions considerably improves their thermostabillity without an essential increasing of the ferromagnetic resonance linewidth (FMR).
Modeling of concentration profiles of charge carriers in inhomogeneous epitaxial layers
(Видавництво Національного університету «Львівська політехніка», 2002) Pavlysh, V.; Danchyshyn, I.; Korzh, R.; Dronyuk, M.; Lviv Polytechnic National University
The new approach to the construction of the microtechnology physical-technological models is proposed in the present work. This approach allows us to analyse the processes of the IC and hybride IC epitaxial, resistive and conductive structures growth and formation of their electrophysical and mechanical parameters. We elaborated the model describing charge carriers concentration profile of inhomogeneous epitaxial structures that were grown under different technological conditions.
Investigation of indium antimonide microcrystals irradiated with fast neutrons
(Видавництво Національного університету «Львівська політехніка», 2002) Bolshakova, I.; Leroy, C.; Kumada, M.; Lviv Polytechnic National University; Laboratory R-J.A.-Levesque, Montreal University, Canada; National Institute of Radiological Sciences, Japan
Microcrystals of III-V semiconductor compound indium antimonide were obtained by means of complex doping in the growth process. Such compounds are stable after irradiation with fast neutron fluences up to 1016 n⋅cm-2. Magnetic field microsensors developed on their base are applied in magnetic measuring systems for charged particle accelerators and in the space instrumentation building.
The applying of the hyper-text means for the electronic technical products designing documents pre-working
(Видавництво Національного університету "Львівська політехніка", 2002) Grigoriev, Vitaliy; Tolochko, Irina; Lviv Polytechnic National University
The electronic products designing documents hyper-text system structure, building principles, software and informational supplying are considered. By the specification record activising the system allows to find and load the appropriative software for the visualising and editing the designing document or product included by the electronic device.
The analysis of technologycal methods for preparation of reflecting grading for devices based on surface acoustic waves
(Видавництво Національного університету "Львівська політехніка", 2002) Smerklo, Lubomyr; Shkoropad, Vasyl; Zubkov, Anatolij; Kuchmij, Galyna; Lviv Radiotechnical Research Institute; Lviv Polytechnic National University
The formation methods for reflecting grooves with vertical walls and depth of up to 7 are analyzed and optimized at the paper.
Thermal residual stresses in thick film structures resistor on dielectric – FEM analysis
(Видавництво Національного університету "Львівська політехніка", 2002) Jakubowska, Małgorzata; Golański, Dariusz; Kaliński, Dariusz; Hotra, Zenon; Lviv Polytechnic National University; Rzeszów University of Technology; Warsaw University of Technology; Institute of Electronic Materials Technology
This paper presents the results of calculations performed using the finite element method (FEM) which include a comparative analysis of residual stress state induced in thick film structures resistors on dielectrics which differ from one another in materials used to perform dielectric layers. This analysis permitted us to test the materials examined in terms of the level and distribution of the residual stresses developed in the structure.
Using of moment method for parasitic parameters of printed circuits in planar structures
(Видавництво Національного університету «Львівська політехніка», 2002) Sabat, Wiesław; Kalita, Włodzimierz; Wisz, Bogusław; Sperling, Dieter; Rzeszów University of Technology
This paper presents using of moment methodfor printed circuit residual parameters’ calculation in single-layer planar structures. In accordance to the method’s assumptions, the relations specifying the potential coefficients for printed circuit with arbitral geometric parameters were determined. Using the Mathcad program, basing on the relations as referred to above, the program was developed for calculation of unitary matrices of parasitic capacities and inductances of printed circuit of mutually parallel lines. In order to verify the developed program operation, the hybrid test printed circuits with different geometric parameters were made. The correctness of calculation procedures within the developed program was experimentally verified using the direct measurement for the capacity and the indirect measurement for the inductance.
Mechatronic system for pressure control
(Видавництво Національного університету "Львівська політехніка", 2002) Drumea, Petrin; Comes, Mircea; Mirea, Adrian; Dobrin, Dănică; Hydraulic and Pneumatic Research Institute, Bucharest, Romania
The mechatronic system, that has been presented in this article, is a force adjustment system through pressure control. As a practical application of this system is the adjustment of the pressing force on a technological line for manufacturing rubber carpets on a textile support. The main condition, required by the technologic process, is to maintain a constant value for the pressing force during the entire process, in order to maintain a constant thickness of the rubber carpet. The mechatronic system is formed from two sub-systems, a hydraulic actuating subsystem and an electronic driving system (servo-controller). The electric signals from the transducers are sent to the servo-controller, for processing. The servo-controller compares the signals with pre-programmed values and drives the electromagnets from the proportional directional valve. By driving the proportional directional valve, the hydraulic system is driving the hydraulic cylinder, resulting the real pressing force, required by the parameters of the technological process.
Researches of selected electric properties of threonine doped TGS single crystals
(Видавництво Національного університету "Львівська політехніка", 2002) Proszak, Wladysław; Technical University in Rzeszów, Poland
This paper contains results of the researches upon new pyroelectric material: triglycine sulphate doped with threonine. Because of the future application of the new obtained single crystal as the active element of IR detection, temperature characteristics of electric hysteresis loop parameters and pyroelectric coefficient were investigated. Temperature dependencies of spontaneous polarisation, coercive field and pyroelectric coefficient are presented as well as the measurement systems designed for determination of the mentioned above dependencies.
Module for fuel consumption measurement
(Видавництво Національного університету «Львівська політехніка», 2002) Drumea, Petrin; Comes, Mircea; Mirea, Adrian; Hydraulic and Pneumatic Research Institute, Romania
Today is important for transport companies to monitorize fuel consumption. To perform this task is necessary to have on the car a black box inaccessible to driver. This can be done using a flow transducer coupled to a smart electronic module. The authors designed a volumetric rotational transducer that contains a Hall sensor. The pulses generated by this sensor as well as driving wheels rotation information are used by an electronic module to calculate total fuel consumption.
The reflections produced by lumped load of digital signal line
(Видавництво Національного університету "Львівська політехніка", 2002) Golumbeanu, Virgil; Svasta, Paul; Ionescu, Ciprian; University Politehnica Bucharest
In interconnection technique of digital circuits in general the matched lines method for reducing the influence of reflections in a view to a good working of interconnected circuits is used. Due to the input capacitance of digital circuits appears a reactance load. Although the matching is very good realized from the viewpoint of the resistive load, there is a reactive mismatching that can produce reflections at high frequency. Using Laplace transformation the reflections produced by parasitic capacitance load will be determined. These reflections will be analyzed depending on the type of the digital circuits and the parameters of the interconnection line. For some types of digital circuits the maximum fanout from this point of view will be determined.
Concentration dependence of Curie temperature of two-sort temperature of amorphous magnets
(Видавництво Національного університету "Львівська політехніка", 2002) Margolych, Iryna; Lviv State Medical University named after Danylo Galytsky
The Curie temperature of two-component amorphous ferromagnet is found using the expansion of the free energy in powers of order parameter. For the model with liquidtype disorder introduced via hard spheres structure factor the explicit expression for the concentration dependence of ferromagnetic ordering temperature is obtained.
Selected problems of one-chip microcomputers’ applications in DC/AC converting circuits
(Видавництво Національного університету "Львівська політехніка", 2002) Grzesiak, Wojciech; Maj, Tomasz; Cież, Michał; Zaraska, Wiesław; Kalita, Włodzimierz; Sabat, Wiesław; Institute of Electron Technology, Poland; Department of Electronic Systems, Rzeszow University of Technology, Poland
The paper presents problems connected with generation of sin – and trapezoidal signals as basic ones in the DC/AC energy conversion process. Questions on loads of various characters while alimented with sine – and trapezoidal voltages have been outlined. Basic construction features of both types microcomputer equipped inverters have been discussed, in particular those dealing with a significant number of safety measures and with characteristic attributes of final power stages, determining the behaviour of inverters in various output power conditions. On examined sample inverter types of own design a complete compliance with requirements of electromagnetic compatibility standards has been pointed out thanks to proper planning and structural solutions.
Microsystem for 2-D magnetic-field measurement
(Видавництво Національного університету "Львівська політехніка", 2002) Roumenin, Chavdar; Dimitrov, Konstantin; Institute of Control and System Research at Bulgaria Academy of Sciences
A new silicon microsystem for simultaneous and independent measurement of the in-plane Bx and By components of the magnetic field vector B has been designed, fabricated and tested. It consists of two functionally integrated triple parallel-field Hall sensors with mutually perpendicular orientation. The obtained characteristics of this 2-D mag-netometer are very promising
Limitation of third harmonic of supply network current in phase control systems of commutator motors
(Видавництво Національного університету «Львівська політехніка», 2002) Gąska, Dariusz; Kalita, Włodzimierz; Zając, Kazimierz; HYBRES Electronics Ltd., Rzeszów; Rzeszów University of Technology, Dept. of Electronic and Communication Systems
This paper presents simple non-conventional circuit design for the third harmonic limitation of power supply current that is drawn by the medium power commutator motor with the phase control. The proposed solution features a simple design, low manufacture costs and operational effectiveness.
Relation between domain structure distortion and coercive field in l-lysine doped TGS single crystals
(Видавництво Національного університету "Львівська політехніка", 2002) Trybus, Mariusz; Kalita, Włodzimierz; Proszak, Władysław; Rzeszów University of Technology, Poland; Rzeszów University of Technology, Poland