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Application of capacity sensors in technical practice
Michalík, Lukáš ; Kratochvíl, Tomáš (referee) ; Frýza, Tomáš (advisor)
This bachelor work deals with a comparison of several capacity touch sensors from dierent companies. The aim of this comparison is the selection of one type of capacity touch sensors which will be used to construct the audio amplier touch screen control panel. The selected type of capacitive sensors is described and tested. Tested properties are compared with the data specied by its producer. In the second part of this work, there will be designed and constructed audio amplier. With help of the selected capacitive touch sensor the touch screen control panel for this amplier is created. The control touch panel manages all of the available features of ampliers.
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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 class D audio power amplifier for home use
Raba, Jaroslav ; Kratochvíl, Tomáš (referee) ; Brančík, Lubomír (advisor)
This thesis describes the design and construction of a complete audio power amplifier 2x100W of Class D. The proposal contains an active correction preamplifier unit, a power supply unit and indicator unit of the amplifier excitation. The power amplifier is composed of an integrated circuit TAS5611A from Texas Instruments. The correction preamplifier is controlled by four potentiometers. Excitation of the amplifier is displayed using LEDs. Basic parameters are measured and evaluated for all blocks of the amplifier.
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Design and construction of audio power amplifier
Růžička, Jaroslav ; Kratochvíl, Tomáš (referee) ; Brančík, Lubomír (advisor)
This bachelor’s thesis is concerned with amplifier classes, integration end-level, protective circuits and concrete concept of class AB power amplifier, including concept of preamplifier and power amplifier. Features of designed circuits were simulated in PSpice software. These individual concepts of modules are connected with DPS. This thesis contains results of measurement and photos of amplifier.
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Switched four-channel car amplifier
Lev, Lukáš ; Kratochvíl, Tomáš (referee) ; Brančík, Lubomír (advisor)
The topic of this semester project is the design quadraphonic car-amplifier switching concepts with a minimum output power 4x50W, with correction preamplifier and appropriate power source. This amplifier is realized by using a power amplifier in class D integrated circuit TAS5630, preamplifier MAX5486 and increasing DC / DC converter LTC3862.
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Class D audio power amplifier with input selector
Krmela, Tomáš ; Šotner, Roman (referee) ; Kratochvíl, Tomáš (advisor)
This thesis deals with a Class D low-frequency amplifier in class D with an input selector and a tone preamplifier. The preamplifier consists of a Philips TDA1524A electrical circuit. The advantages of this circuit are the usage of simple potentiometers and the absence of potentiometer electronic noise when tuning due to the voltage control of corrections. Core power module is a STmicroelectronics TDA7490 electrical circuit. It is a stereophonic 2 x 25W Class D audio power amplifier.
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Construction of class T audio amplifier
Tejmlová, Lenka ; Slezák, Josef (referee) ; Petržela, Jiří (advisor)
The aim of my bachelor’s thesis is to collect information about amplifiers, working in the T class. Because these amplifiers are usually used as digital power processing audio amplifiers, we mostly insist on the ability of sending, the signal without distortion, to amplify the frequency broadband signal, to obtain the high efficiency of the output stages and to obtain the peak quality of the sound. My task is to gather information and facts of principle of the function of the audio amplifiers working in the T class and reasonably priced integrated circuits of this class. Furthermore I am going to focus on the design of wiring of this amplifier with the 2x20 watts output, including the correction pre-amplifier, which provides correction of the heights, basses and volume. The amplifier is realized, in the end of bachelor’s thesis, there are measured it’s characteristics, which are compared to theory.
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Audio power amplifier 2 x 50 W
Skalický, Pavel ; Šotner, Roman (referee) ; Kratochvíl, Tomáš (advisor)
The topic of my bachelor´s theis is design of class AB audio power amplifier 2 x 50 W/4 with preamplifier and stereo output. The design is standard solution of stereophonic version of power amplifier, with monolithic integrated circuit 2 x LM 3886. The project deals also with preamplifier with integrated circuit LM 1036, calculation of heat sink of power circuits and solution of supply. The aim of this bachelor´s project was make complete design of laboratory prototype (scheme, layout of printed circuit, part list and placemnet, amplifier arrangement), realisation function of prototype and laboratory measurements.
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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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