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Wireless interface for digitally-controlled applications
Valouch, Martin ; Rumánek,, Jaroslav (referee) ; Brančík, Lubomír (advisor)
The thesis aim is in practical realization of wireless interface, which is created by infrared relay in motorcycle Simson. Infrared relay is used for speed measuring. This work describes the realization of digital controlling by microcontrollers. Digital controlling can easily improve and upgrade functions for better driving comfort. It’s possible by getting information about condition of selected motorcycle parts. This information can be engine temperature, battery charge, total distance and etc.
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Design and construction of double laboratory power supply
Klein, Miroslav ; Šebesta, Jiří (referee) ; Brančík, Lubomír (advisor)
This semester thesis deals with design of double laboratory DC power supply with adjustable voltage and current limitation. Power supply can work in two states. First state allows regulation of output voltage from 0V to 40V and current limitation from 0A to 3A. In second state the range of output voltage is from 0V to 18V and output current can be set from 0A to 6A. Both supplies are galvanically separated and can work independently, or can be combined. Whole power supply is digitally controlled by microcontroller.
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Design and making of low-frequency power amplifier in class AB
Dušek, Martin ; Kratochvíl, Tomáš (referee) ; Brančík, Lubomír (advisor)
In this bachelor thesis I am occupied with low frequency amplifiers, theirs important parameters, classes and with integrations end-level. Next I am occupied with miscellaneous types of preamplifiers and additional circuits. There are simulated schemes of corrective preamplifier, protections scheme and high power amplifier in PSpice software in this thesis. These schemes and next additional modules are connected with DPS. This thesis contains result of measurement and photo functional sample.
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Design of class AB audio power amplifier
Hynek, Jiří ; Kratochvíl, Tomáš (referee) ; Brančík, Lubomír (advisor)
his thesis is focused on a proposal of an audio power amplifier of class AB with minimum capacity of 2 x 80 Watt and with a possibility to control the frequency characteristics, volume and balance. An usage of this proposal is wide today. The proposal is designed to be made from common available components. This thesis includes proposal of an acceptable power supply and proposal of an active cooling elements.
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Design of switching-mode audio power amplifier
Svadbík, Vít ; Sutorý, Tomáš (referee) ; Brančík, Lubomír (advisor)
This work describes the design of audio amplifiers operating in switching mode. The first part describes basic principles of the power stage switching concept. There is described differences between classes of amplifiers according to technology. The second larger part includes design and construction of the switching amplifiers. Design is implemented, including the preamplifier and power supply. Power supply works in switching mode. The measured parameters of the proposed facility are given in the last part.
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Design of switching stereo audio power amplifier
Christen, Jiří ; Kratochvíl, Tomáš (referee) ; Brančík, Lubomír (advisor)
This work deals with complete design of switch - mode audio power amplifier. The first part of the work describes basic principles of power amplifier operating in switch mode and differences between classes. Specific parts of the amplifier are analysed according to function and construction. The second part includes particular design and construction of the class D switching amplifier with a minimal output power 2x80W. The power stage is realized by an integrated circuit TAS5630 from Texas Instruments. Basic states of the power stage are signalized by LED diodes. The design includes correction preamplifier for adjusting volume and frequency response. The appliance is supplied from switch - mode power supply. Basic parametres were measured for individual parts.
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Dual channel bench power supply
Stehlík, Ota ; Brančík, Lubomír (referee) ; Kubíček, Michal (advisor)
The aim of this thesis is to design and construct a two-channel bench power supply with variable output voltage in range from 0 V to 25 V with a maximum output current of 2 A. At the beginning of the thesis a general principles of power supplies are summarized. In the following section a detailed design description and simulation results of the main power supply are given. Afterwards, the design and description of auxiliary power supply with electronically controlled fan is presented. Finally, measured characteristics of the bench power supply are given.
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Interconnects modelling for signals transmission
Fabián, Martin ; Petržela, Jiří (referee) ; Brančík, Lubomír (advisor)
In this work, there is solution for problem about signal itegrity and problems that causes raising frequence in circuits and machineries. There is describe interconnect analysis of models, which enable transfer of signals in mixed analog – digital circuits and a different between the analyse of an time domain and an s-domain. Next, there are described three methods of the calculation homogenous transmission line.The first method is constructed on mathematic description of transmission line. The second method uses cascade connection and T networks to the simulation model of the homogenous transmission line. The last one is constructed on the moment matching in use of state variables. These methods uses numerical inversion of Laplace transforms and these methods are constructed in programming language Matlab. Its results with the confrontation is described in the ending.
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Design of class-D amplifier for subwoofer
Brázda, Jakub ; Petržela, Jiří (referee) ; Brančík, Lubomír (advisor)
This work is focused on design high performance D class amplifier for subwoofer. The type of amplifiers and their parameters are described. The next part of work is design of preamplifier with active low-pass filter. Preamplifier enable set dividing frequency, phase and volume. The switching power supply of forvard topology id design for a both devices. The design od all part is supported by calculations and simulations. For every device is design PCB. The appearance of device is designed so that it can be placed into the speaker box.
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