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Measurement system with preamplifier for calibration of vibration sensors
Kaštovský, Jan ; Doseděl, Martin (referee) ; Havránek, Zdeněk (advisor)
This thesis deals with the design and implementation of a preamplifier for vibration sensors with IEPE interface and also for vibration sensors with charge output. The thesis also deals with a modification of a computer application for a measuring system in LabVIEW. The thesis builds on the already implemented measuring system for secondary calibration of vibration sensors. The results of the secondary calibration of this system with the added preamplifier are compared with the results of a primary calibration.
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Low frequency preamplifier with audio input selector
Tlamka, Vladimír ; Levek, Vladimír (referee) ; Šteffan, Pavel (advisor)
This bachelor thesis is about the design and construction of a low-frequency stereo preamplifier with a digitally controlled switch of eight stereo inputs with different input sensitivities. In this task is the most important the quality of listening due to low crosstalk between channels, high signal-to-noise ratio and low distortion. The design includes a preamplifier with RIAA frequency correction for the possibility of direct connection of phono cartridge
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Precision audio preamplifier for headset measurement
Šimek, Michal ; Balík, Miroslav (referee) ; Hanák, Pavel (advisor)
This thesis deals with microphone and headphone preamplifier for microtelephone and headset. The design shall meet the electrical interface requirements set out in ITU-T Rec. P.381(08/2012). The design includes a voltage converter, microtelephone bias and both a battery and an external power supply. In this work is also described the design of printed circuit board and the solution of a low noise in the whole circuit. The aim of this thesis is to design, built and embed the laboratory fixture into a metal box. Finally, measure the product on an APx525 audio precision analyzer.
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Precision audio preamplifier for headset measurement
Šimek, Michal ; Balík, Miroslav (referee) ; Hanák, Pavel (advisor)
This thesis deals with microphone and headphone preamplifier for microtelephone and headset. The design shall meet the electrical interface requirements set out in ITU-T Rec. P.381(08/2012). The design includes a voltage converter, microtelephone bias and both a battery and an external power supply. In this work is also described the design of printed circuit board and the solution of a low noise in the whole circuit. The aim of this thesis is to design, built and embed the laboratory fixture into a metal box. Finally, measure the product on an APx525 audio precision analyzer.
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Hybrid Microphone Preamplifier With Variable
Selection Of Amplifier Technology
Musil, Tomáš
This paper deals with the design of a studio level hybrid microphone pre-amplifier using a vacuum tube and semiconductor technology. The pre-amplifier circuit also contains an analog VU meter, 48 V phantom power supply, variable high pass filter, phase inverter switch and adjustable stage input impedance. This paper also deals with the design of a multi-voltage power supply unit and microprocessor controller unit ensuring completely automatic amplifier functions. The end of the paper is dedicated to a characteristics measurement determining its parameters.
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Precise Audio Amplifier for Quality Listening
Janošík, Lukáš ; Šotner, Roman (referee) ; Kratochvíl, Tomáš (advisor)
This bachelor thesis deals with a design of quality audio preamplifier designed for high quality production. The typology of whole design emphasizes very important transmission properties, i.e. high signal-to-noise ratio, high separation of channel, low distortion, The content of the semestral thesis is an symetrical input, relay input switch, 5 band equalizer with bypass and symetrical output with active line driver.
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Electric Volin with MIDI Output
Spilka, Benedikt ; Vrba, Kamil (referee) ; Schimmel, Jiří (advisor)
The main aim of this diploma thesis is to design and to construct a electric violin with MIDI output. This thesis include design and conctruction of violin pickup, violin electronic and software for translation of sound into MIDI messages. design of the instrument´s body is presented at the end of the thesis. Violin electronic include circuits for filtration, amplification, processing and AD/DA conversion of audio siganl. Software for MIDI transfer recognizes notes and translates them to MIDI messages.
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Digital Mixing Console
Přibyl, Libor ; Krajsa, Ondřej (referee) ; Kubánek, David (advisor)
The presented work deals with the issue of digital mixing console. The main focus is on the design of sub-circuits for the digital mixer and the construction into the 19 "rack unit. The thesis presents a detailed description of individual parts and their use. Thesis also includes complete device designs, including a power supply and additional circuits.
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Stereo audio power amplifier with microcontroller
Filko, Patrik ; Götthans, Tomáš (referee) ; Brančík, Lubomír (advisor)
This bachelor thesis deals with designing stereo audio power amplifier, which specified functions such as control of volume, depths, treble and balance, are contoled by 16-bit microcontroler with digital potentiometers. Setting those functions is pictured on simple LCD display. Opted amplifier is easy to control ergo it finds use in wide spectre of audio devices such as ampliffing input signal from transmission audio media player or audio signal in television devices. Used design is able to be realized of easy to get components.
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Audio preamplifier with input selector
Starčok, Tomáš ; Adámek, Martin (referee) ; Šandera, Josef (advisor)
This thesis deal with the audio preamplifier with input selector. It describes all designed parts of this device. It selects and describes all suitable components. Describes the whole process of electronics design in this device. Then describes the design, manufacture, assembling and testing of the PCB. In conclusion it shows the achieved results and electrical parameters of the device.
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