Елементи теорії та прилади твердотілої електроніки

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Author: search.filters.author.Hotra, Zenon

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    Inductive couplings in hybrid microcircuit structures
    (Видавництво Національного університету “Львівська політехніка”, 2002-03-26) Hotra, Zenon; Wisz, Bogusław; Kalita, Włodzimierz; Sabat, Wiesław; Department of Electronic Devices; Department of Electronic Systems and Telecommunication; Rzeszów University o f Technology
    Розглянуто проблему, яка стосується аналізу індуктивних зв’язків між провідними доріжками в мікроелектронних гібридних мікросхемах. Описано алгоритм, який дає змогу визначати власну і взаємну індуктивність для систем з взасмнопаралельними провідними доріжками необмеженої довжини. Проведено аналіз ефективності алгоритму для вибраної системи доріжок за допомогою тестового імпульсу струму Сержа. Визначено вплив імпедансного навантаження та геометричних і фізичних параметрів провідних систем на рівень генерованих взаємних завад у гібридній мікросхемі.
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    Transient temperature field in thick-film multilayer structures
    (Видавництво Національного університету «Львівська політехніка», 2002) Błąd, Grzegorz; Hotra, Zenon; Klepacki, Dariusz; Potencki, Jerzy; Rzeszów University of Technology; Lviv Polytechnic National University
    The paper presents two methods of temperature field simulation in thick-film multilayer structure with local pulse heating. The first method is based on the equivalent electrical model of heat transfer. Simulations have been made using PSPICE program. The basis of the second one is solving the heat equation through integral transforms. Calculations were made on example thick-film laser power detector.
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    Dynamic properties of humidity sensor with active layer based on composite material: PVA + Sn
    (Видавництво Національного університету "Львівська політехніка", 2002) Hotra, Zenon; Proszak, Danuta; Melnyk, Oleg; Woś, Bogdan; Lviv Polytechnic National University; Rzeszów University of Technology, Dept. of Electronic and Communication Systems; Rzeszów University of Technology, Department of Heating and Climatization; Rzeszów University of Technology, Department of Physics
    This paper presents results of the researches upon humidity sensors based on humidity sensitive composite material: PVA + Sn. Construction of the sensor is presented. Influence of electrodes’ configuration and arrangement on static characteristics and dynamic properties of the sensors are also included.
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    Neural network controller for individual pulverised coal burner
    (Видавництво Національного університету "Львівська політехніка", 2002) Wójcik, Waldemar; Hotra, Zenon; Golec, Tomasz; Komada, Pawel; Kotyra, Andrzej; Smolarz, Andrzej; Technical University of Lublin, Poland; Lviv Polytechnic National University; Rzeszów University of Technology, Poland; Institute of Power Industry, Poland
    Burning pulverised coal in power boilers causes considerable emission of atmospheric pollution. In order to decrease it the combustion process itself has been modified, however at cost of side effects like: increased level of unburned coal particles in the ashes. There are tens of burners in a single power boiler and emission level measurements are made in flue gas duct, so the control based on such averaged and heavily delayed values often results ineffective. The neural controller of the pulverised coal burner attempts to resolve these problems. The clue is utilisation of fibre-optic system for monitoring of chosen zone of flame developed in Department of Electronics of Technical University of Lublin in subordinate control loop. The article contains description of controlled system and optical fibre measurement system as well as the idea and simulations of new control method.
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    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.