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Design and realization of the measuring amplifier of mechanical quantities
Kaplan, Tomáš ; Chalupa, Jan (referee) ; Krejčí, Petr (advisor)
Subject of this effort is development and realization of one-channel data acquisition unit of mechanical quantities and it’s PC software application. Usage of this data acquisition unit is aimed on applications, where resistive strain gages wired as Wheatstone bridge with AC excitation are used. Output voltage of Wheatstone bridge is amplięed, demodulated with excitation voltage, filtered and level shifted for analog to digital conversion via AD converter. Converted digital data are sent via serial bus into microprocessor which sends them into PC for further meaningful representation in software application. Besides sensing bridge output voltage, data acquisition unit also generates AC excitation of Wheatstone bridge. This excitation voltage is generated via DA converter which communicates with microprocessor and converts incoming digital data into analog sine waveform. There is precise voltage reference circuitry for both of these converters. PC application’s task is to visualize measured data in meaningful form and to give tools for further work with measured data. It’s programmed in Python language and it has one independent thread which does reading and computing of incoming data and there is also class which builds graphical user interface and plots measured data into live graph.
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Digital audio interface converter with an external PLL
Klubus, Jan ; Balík, Miroslav (referee) ; Hanák, Pavel (advisor)
The design of the learning hardware for the laboratory role of the BSHE, which will serve as a test sample, and will permit students to display signals in individual parts of the circuit using an oscilloscope. This device convert the S / PDIF and AES3 signal, it have a line and headphone output and the phase lock loop will be output separately for signal tracking.
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Electronic load
Doležel, Jiří ; Vorel, Pavel (referee) ; Huták, Petr (advisor)
Bachelor’s thesis deals with the analysis solutions and construction of the DC electronic loads. At the beginning, they describe the basic principles of electronic loads. In other parts of the work is compared commercial electronic loads, under which the requirements will be selected on the proposed electronic load. In other chapters of the work devoted to the design of schemes and selecting components for their manufacture, including dimensioning of cooling power parts. The last chapters are devoted to describing the design and measurement of electronic load.
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Data aquisition card for integrated circuit tester
Koleček, Jan ; Pristach, Marián (referee) ; Dvořák, Vojtěch (advisor)
The goal of this bachelor's thesis is to design and realize a data acquisition card. The main task of the designed card will be to generate stimulating signals for the tested integrated circuit, to process signals generated by the tested integrated circuit, to convert them into a digital form and to send them to a superior system. The thesis will present a choice of integrated circuits suitable for its realization, a wiring diagram of the data acquisition card, PCB design and VHDL code for the control FPGA chip.
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Audio synthesizer in FPGA chip
Tomko, Jakub ; Pristach, Marián (referee) ; Bohrn, Marek (advisor)
This thesis analyses methods of sound synthesis. Advantages and disadvantages of application of individual methods in music synthetizers are evaluated. Based on piano sound analysis, the suitable method for synthesizer's design is chosen. Synthesizer has been implemented in FPGA of Spartan-3 Development Board.
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Recorder with SD card
Dohnal, Petr ; Fiedler, Petr (referee) ; Bradáč, Zdeněk (advisor)
This thesis presents the design and construction of Recorder with SD card. The paper deals with methods of communication between integrated circuit devices and the various functional blocks of equipment. Thesis also discusses the use of the FAT system for storing data on an SD card, file format .wav and convert analog signal to digital.
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Digital AM / FM transmitter
Kováč, Marek ; Strašil, Ivo (referee) ; Pavelka, Ondřej (advisor)
This master thesis is focused on the theoretical description and practical implementation of software defined transmitter. The main aim of this thesis was made the prototype of software defined transmitter in FM band. Theoretical part is determined to description of basic parts of equipment and working principles to understand the basic principle of digital transmitters and define the appropriate component base for construction. Discussed are used types of A/D and D/A converters, blocks of digital signal processing and the roles, which these components performs. The second part is focused practical. Specified are suitable types of components and block diagram is proposed for following electrical connection and printed circuit board in Eagle program as a plug-in modul for developmental platform Arduino. The main point is program, which sets and controls the transmitter. Next important part is impedance match and antenna tuning, which is explain in practical part of thesis. The result is prototype of software defined transmitter compatible with Arduino Uno platform.
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uP Signal Generator
Tesař, Jaroslav ; Bradáč, Zdeněk (referee) ; Kučera, Pavel (advisor)
In the first part of this work, the digital-to-analog conversion problem and the single-chip microcontroller problem are theoretically described. The HW design of the low-frequency harmonic waveform generator, which is controlled by a microcontroller, is described in the second part. The third part deals with the description of ways how to generate harmonic waveforms using a microcontroller and DA converters. Furthermore, it describes the firmware of the microcontroller. The fourth part presents achieved results and electrical characteristics of the designed generator.
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