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Design of measuring solutions for circuits with differential signals
Jemelík, Lukáš ; Hanák, Pavel (referee) ; Jeřábek, Jan (advisor)
This master´s thesis deals about a measuring structures of elements working at a current mode. There were outlined structures for measuring input and output impedance. These structures were simulated for DACA element. It deals with a voltage to current and current to voltage converters. All structures and converters were simulated at computer program PSpice. Selected variant were practically verified and control measuring was realized.
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Vector image export program for Autodesk Eagle
Sičkaruk, Roman ; Kubánek, David (referee) ; Hanák, Pavel (advisor)
This master’s thesis deals with design and creation of ULP program for export of vector images in EMF (Enhanced Windows Metafile) format. The main aim of this thesis is to add support of all features of Autodesk Eagle version 9. Thesis is important due to bugs and imperfections of other ULP programs for exporting of vector images to other formats also because of they aim for older versions of Autodesk Eagle. With regard to small quantity of EMF literature, thesis is beneficial as it describes behaviour of base structures and describes creation of EMF metafile. It also provides example of iteration over individual parts of schemes and printed circuit boards. Main goal of this thesis was completed. User is allowed to export currently visible layers, set order of their printing, with remain of true colors and orientation. Program was tested in Autodesk Eagle systems version 9.1.3 and 9.3.2.
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Controlled high voltage source
Chloupek, Jiří ; Hanák, Pavel (referee) ; Koton, Jaroslav (advisor)
The aim of this master thesis is to design a high voltage source for the generation of bipolar pulses, which are suitable for the process of reversible and irreversible electroporation. Further design is electronic control. The first part of the thesis analyzes the theoretical knowledge about the process of electroporation, the second part describes the principles of realization of such sources, the next part deals with the design of the source and its control. The penultimate part is a description of the user manual and the last part is dedicated to the measurement.
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Measurement of passive frequency crossovers for loudspeaker systems
Holínský, Jan ; Hanák, Pavel (referee) ; Balík, Miroslav (advisor)
The content of the master´s thesis is to approach the issue of measuring the characteristics of passive frequency crossover. The work describes individual types of measured characteristics and their possibility of measurement. Then the work describes design of modules for measurement characteristics of passive frequency crossover (shunt, resistive load and amplifier). These modules were made and tested for its functions. For the amplifier is then made a second design for fulfilment requirements. The second version isn’t made in this work. At the end of the work was prepared the theoretical part of the laboratory task: Measurement of characteristics of passive frequency crossover, including protocol.
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Design and verification of properties of current mirrors with unipolar transistors
Drápalík, Michal ; Hanák, Pavel (referee) ; Vrba, Kamil (advisor)
The work named Design and verification of properties of current mirrors with unipolar transistors solves the problems of simplify the calculation of current transmission. During the calculation we neglet unimportant parametres. In the begining is theory of current mirrors. For every of each selected mirrors there is calculation of SNAP programme. Following step is simplify calculation by math operations. Using simplified models of replacement transistors we can make easy calculation of current transmission. In the end of work there are all results of calculation.
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Grid dip meter with large-diameter measuring coil
Obr, Michal ; Koton, Jaroslav (referee) ; Hanák, Pavel (advisor)
This master’s thesis deals with grid dip meter, its operating principle, characteristics and with measuring procedure. The thesis contains basic division of oscilators, its characteristics and operating principal. The master`s thesis contains complete design of grid dip meter with large-diameter measuring coil which is placed outside the device. Grip dip meter is made of SMD components on a one-sided printed wiring. Grip dip meter consist of transformer itself, that has two secondary windings as a supply for resonance meters and internal digital frequency meter. The device has analog panel gauge and BNC input for extrenal counter.
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Universal Analyzer of Serial Buses
Gajdoš, Matúš ; Hanák, Pavel (referee) ; Sysel, Petr (advisor)
The purpose of this master’s thesis is to design and to realize the universal analyzer of serial buses. At the beginning there are described in detail specifications and properties of buses IC, SMBus, PMBus and of the UART interface. The second part is targeted especially to design and to realize the control unit, which is the main part of the whole analyzer. It provides connecting to the unknown bus, to buses IC, SMBus, PMBus and SPI and to the UART interface. The main part of the control unit is the microcontroller PIC24HJ128GP204, which partially analyses connected bus. In the next part there is created the user application for PC, which controls and sets the control unit and receives from it partially analyzed data through the USB port. These data are used for the rest of the analysis that is done by the user application. Results may be presented to user in graphical or text form. The user application provides export of results into some of image formats. Supported formats are PS, SVG, PDF, PNG and BMP. In case of the control unit is not available, the user may choose the simulator to simulate some functions that the application provides. It supports simulation of the analysis of the unknown bus and the IC bus. The user application also contains the function of the generating own signals. Signals can be created interactively by using the mouse in the graphical representation of this signal. They can be sent to the control unit and after that it applies them to output. This function is not supported in current version of the control unit software. The user application includes some items, which do not have implemented any methods and they are prepared for the future upgrading of the analyzer. It means especially user controls and components for signal conversions between any buses.
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Remote wireless control with encoded transmission
Polách, Matěj ; Hanák, Pavel (referee) ; Szabó, Zoltán (advisor)
This thesis deals with a wireless transmissions issues. It describes the device designing which communicate bidirectionally in free frequency band of 2.4 GHz. It deals with the modulation methods, coding and other wireless transmissions necessities and about prefabricated RF modules properties. It solves voltage level shifting which is essential for SPI communication between microcontroler and module.
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Sensorless velocity control and positions of d.c. low-power brush motor
Svoboda, Jan ; Hanák, Pavel (referee) ; Prajzner, Václav (advisor)
This bachelor's thesis focuses on sensorless control of low load brushed DC motor that is used in the actuators made by the Honeywell company. The first part provides an introduction into motor control and common used methods of speed and position sensing of brushed DC motor. Sensorless method of sensing described in this work is the detection of commutation pulses from the signal of motor current. These pulses are caused by brushes leaping over the commutator bars. Correct evaluation of commutation pulses can provide the information about velocity and position of the motor. This relatively new method of detection of commutation pulses is investigated and arising problems are demonstrated on measured samples of signal. Suitable methods of signal processing are then proposed. Infallibility of these signal processing methods is then proved on the set of signals measured under circumstances of supply voltage and abrasion. Then it is decided which signal processing method that sensorless control system can use is the best.
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Control of Bang&Olufsen Products Using Bluetooth Technology
Mandík, Martin ; Hanák, Pavel (referee) ; Schimmel, Jiří (advisor)
This master thesis deals with the creation concept of the Bluetooth module and applications for mobile phone and PDA. After the connection of the concept with remote control, enable extend of control the Bang&Olufsen products with using mobile phone or PDA. Applications in mobile phone or PDA will communicate to the concept of using Bluetooth technology. The result of this thesis is the creation of printed circuit boards and applications for mobile phone and PDA.
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