National Repository of Grey Literature 105 records found  1 - 10nextend  jump to record: Search took 0.00 seconds. 
Diode shaping circuit examples for educational purposes
Kasatkin, Alexey ; Petržela, Jiří (referee) ; Šotner, Roman (advisor)
Tato bakalářská práce je věnována návrhu a realizaci diodového obvodu tvarovače a diodových omezovačů obou polarity s různými zapojeními pro laboratorní. Prvním z nich je tří segmentový obvod tvarovače s aktivním prvkem (operačním zesilovačem). Obvod převádí trojúhelníkový signál na harmonický signál. Druhým obvodem je vykrajovač s proudovým sledovačem, který signál na výstupu odřízne. Třetí je jednoduchý omezovač s nezávislým nastavením úrovně omezení. Cílem konstrukce bylo dosáhnout co nejmenšího zkreslení signálu na výstupu. Funkčnost obvodů byla ověřena simulací a měřením.
Synthesis of higher order passive RLC filters for educational laboratory purposes
Černý, Marek ; Petržela, Jiří (referee) ; Rujzl, Miroslav (advisor)
This bachelor thesis deals with the Synthesis of higher order passive RLC filters. The main target was to design a set of filters for educational laboratory purposes, which will contain filters of different orders and approximations (Chebyshev, Inverse Chebyshev and Cauer). The filters were designed according to design tables for standardized lowpass filters and were subsequently simulated in the PSpice program (Frequency analysis, Monte Carlo, Worst Case). Subsequently, a laboratory preparation was designed and revived. Individual filters were tested and compared with ideal waveforms.
Laboratory task dedicated to filters with switched capacitors
Khaibullin, Rishat ; Šotner, Roman (referee) ; Petržela, Jiří (advisor)
This thesis describes the basic principles of circuits based on switched capacitor technology. The advantages of using this technology are described, and the different connection types of switched capacitors are shown. A graphic comparison of the operation of classic analog filters and filters based on switched capacitor technology is also provided. A solution for the implementation of a laboratory board for use in education is offered. The board has been successfully tested, and an example of a laboratory problem solution is given.
Phase shifted harmonic oscillators for practical education
Hudec, Marek ; Petržela, Jiří (referee) ; Šotner, Roman (advisor)
This thesis focuses on designing a laboratory preparation for the study of phase-shift oscillators. The first part of the thesis comprises a theoretical discussion regarding the given problem. The laboratory preparation will include two types of oscillator circuits. An operational amplifier will be used as the amplifying element together with an RC feedback loop in one type of circuit whilst the other type will consist of operational transconductance amplifier employed as inverting amplifiers and generating feedback. The second part of the thesis includes the actual design of the preparation. The design process covers construction stage of the preparation, calculation of the component parameters necessary for oscillation to occur, simulations of the individual circuits along with THD analysis as well as with analysis of manufacturing variances. The second part of the thesis also contains the design of a separate block of all-pass filter. The simulation results will be verified experimentally, on a printed circuit board. In the last part of the thesis, I will evaluate and intercompare the theoretical, simulation and practical results.
Phase shifted harmonic oscillators for practical education
Hudec, Marek ; Petržela, Jiří (referee) ; Šotner, Roman (advisor)
This thesis focuses on designing a laboratory preparation for the study of phase-shift oscillators. The first part of the thesis comprises a theoretical discussion regarding the given problem. The laboratory preparation will include two types of oscillator circuits. An operational amplifier will be used as the amplifying element together with an RC feedback loop in one type of circuit whilst the other type will consist of operational transconductance amplifier employed as inverting amplifiers and generating feedback. The second part of the thesis includes the actual design of the preparation. The design process covers construction stage of the preparation, calculation of the component parameters necessary for oscillation to occur, simulations of the individual circuits along with THD analysis as well as with analysis of manufacturing variances. The second part of the thesis also contains the design of a separate block of all-pass filter. The simulation results will be verified experimentally, on a printed circuit board. In the last part of the thesis, I will evaluate and intercompare the theoretical, simulation and practical results.
Laboratory equipment aimed on the all-pass filters
Lokaj, Jakub ; Šotner, Roman (referee) ; Petržela, Jiří (advisor)
Theme of bachelor thesis is design and realisation of allpass filters. It consists of using pasive and active components in design of allpass filters and followed by realisation in laboratory equipment. Functionality was verified in simulating software LTspice and SNAP3v2. In real implementation were used integrated circuits such as TL071, AD844 and LT1228 for CCII+, OTA and design with op-amp. This bachelor thesis includes concept of laboratory equipment, where will be compared functionality of allpass filters with simulated results
Analysis and circuit realization of special chaotic systems
Rujzl, Miroslav ; Hruboš, Zdeněk (referee) ; Petržela, Jiří (advisor)
This master‘s thesis deals with analysis of electronic dynamical systems exhibiting chaotic solution. In introduction, some basic concepts for better understanding of dynamical systems are explained. After introduction, current knowledge from the world of circuits exhibiting chaotic solutions are discussed. The best-known chaotic systems are analyzed numerically in Matlab software. Numerical analysis and experimental verification were demonstrated at C class transistor amplifier, which confirmed the chaotic behavior and generation of a strange attractor.
Audio amplifier with PWM modulation for laboratory measurements
Holub, Josef ; Petržela, Jiří (referee) ; Kratochvíl, Tomáš (advisor)
This paper deals with the theoretical analysis of the essential parts of amplifier operating in Class D. It describes the principles and the relationship between the individual blocks. The second part deals with the design of the block connection of a switched amplifier for a laboratory device. The design part contains calculations, justification of the selection of individual components and integrated circuits and schematic connection within the individual blocks. Some blocks are simulated using PSpice and FilterFree. The work also deals with the structural design of the jig and the creation of a 3D model. The annex is contained overall diagram of an amplifier and a complete reference material for production.
Single stage amplifiers employing JFET and MOSFET for educational laboratory purposes
Šimek, Dominik ; Petržela, Jiří (referee) ; Langhammer, Lukáš (advisor)
Bachelor thesis deals with design and construction of measuring box for amplifiers with unipolar transistors, which will be used within laboratory classes. The point of the thesis is to create a complex instrument, which offers system used for measuring of essential characteristics of common-drain, common-source and/or common-gate amplifiers. It will help students to more easily understand principle of unipolar transistors. The printed circuit board will contain amplifier circuits with MOSFET and JFET transistors, with option to switch between measuring N-type or P-type channel transistor. The design itself is substantiated by analysis of essential theoretical properties of unipolar transistors, by numerical calculations, and simulations, which are also parts of the thesis.
Analogue comparators for educational laboratory purposes
Šafařík, Daniel ; Petržela, Jiří (referee) ; Domanský, Ondřej (advisor)
The goal of this bachelor thesis is to design complete solution for assembling of laboratory task on comparators topic. This thesis contains an introduction on comparators and a subsequent analysis of some of their basic functions. Thesis also contains design and simulation of the individual parts in the OrCAD program, from which the final product for laboratory task is constructed. There is also design of the printed circuit board along with its measurements. Another part is the process of designing and verifying its functionality. A sample protocol is prepared for the laboratory task.

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