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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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Mixing board with class-AB output amplifier
Krolák, David ; Šotner, Roman (referee) ; Brančík, Lubomír (advisor)
Bachelor thesis deals with the type of mixer preamplifier with active tone control for each of four inputs. This preamplifier is used at dance parties, concerts and recording songs if it equipped with a line output for recording device. The thesis also includes design of power amplifier in class AB with output power 2 × 100 W at 8 nominal load, simulations and a summary of the results.
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Digital equalizer with dynamic range compression
Šafer, Radim ; Kováč,, Michal (referee) ; Brančík, Lubomír (advisor)
The aim of the thesis is to create a digital equalizer with dynamic range compression. The master's thesis is focused on the comparison of functions and parameters of individual digital processors which are given entirely for sound signals processing. It contains the detailed analysis of singular blocks used for signal processing in the circuit AD1953 and possibilities of control over programmable parametres of those blocks by a user. This thesis also contains a comparasion of the chosen A/D converters together with a description of the UDA1361TS circuit. A designed functional diagram of the final device is introduced as well. Thereafter possibilities of controling the individual blocks in the signal processor are mentioned. The final design of the digital equalizer is also introduced along with a description of software essential to a successful control over the processing of the signal in the AD1953 circuit. This thesis also describes a construction of the digital equalizer and involves results of the chosen measurements.
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Multifunction board computer for motorcycles
Netáhlo, Tomáš ; Tošovský, Petr (referee) ; Brančík, Lubomír (advisor)
Master’s thesis deals with a design and a realization of multifunction board computer for motorcycles. The goal of the device is measuring speed, rotation speed of engine, temperature of ambient, temperature of engine, temperature in intake including signalization of overvoltage and hightemperature. The device is completed by above standard function such as measuring titl of motorcycle, climbing of route, route recording and data transmission to the computer. The thesis includes a complete solution of hardware and software part of the device.
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Switched power supply with current limiting
Staněk, Michal ; Brančík, Lubomír (referee) ; Kubíček, Michal (advisor)
This thesis is focused on design and construction of switched mode power supply with continuous regulation of output voltage and current. The Power supply is designed as a switching power supply to reduce its weight and dimensions. To reach better parameters, it consists of two separate converters. The first one is isolated step-down controller with transformer. It supplies output the second controller (adjustable) and the measuring section with stable voltage. Input converter is designed as a simple single-transistor flyback converter. The TOPSwitch circuit was selected to reduce number of components. Output bench power supply is non-isolated buck converter with single transistor. For second converter the TL594 was selected as a control circuit, which typical aplication was modified to fulfill requirement of the bench power supply. Processor ATmega16 was used to show both required and actual values of current and voltage on a display.
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