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Portable device for impedance measurement
Kopic, Jan ; Hruboš, Zdeněk (referee) ; Šotner, Roman (advisor)
This thesis targets on design of portable device for impedance measurement. Theoretical knowledge related to the construction of a portable impedance analyzer is summarized in a separate chapter. This section also compares some commercially available impedance analyzers. In addition, this thesis contains a description of the principle of operation of the impedance analyzer, which is divided into individual function blocks and supplemented by control circuits. A large part of the work focuses on the design of the analog measurement circuit, where suitable measuring methods are also presented. The functionality of the analog blocks of the device was verified by circuit simulation in the PSpice program and by experimental tests. Selection of some components is mentioned in the relevant chapters, where the essential parameters from datasheets are listed. The output of the work deals with a designed prototype of the device, which was tested. Based on the findings some modifications of the device were proposed for practical usability. The attachment of the thesis contains final version of designed printed circuit board.
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Audio amplifier working in class AB with 400W output power
Kopic, Jan ; Šotner, Roman (referee) ; Petržela, Jiří (advisor)
The content of the thesis is the theory related to low-frequency audio amplifiers that is summarized in a separate chapter. This section describes the division of these amplifiers according to various criteria, as well as their working classes and parameters that determine their behavior. In addition, this thesis contains a description of the principle of the function of the selected class AB amplifier, which is divided into individual functional blocks and completed by the addition of speaker protection circuit. Criteria of selection for important chosen components are mentioned in appropriate chapters and supplemented with data from components datasheets. The output results of the simulations are always commented and compared with the calculated values at the end of the relevant chapter. The attachment of the thesis contains PCB design for the device realization. The correct operation of build device has been verified and measured.
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Portable device for impedance measurement
Kopic, Jan ; Hruboš, Zdeněk (referee) ; Šotner, Roman (advisor)
This thesis targets on design of portable device for impedance measurement. Theoretical knowledge related to the construction of a portable impedance analyzer is summarized in a separate chapter. This section also compares some commercially available impedance analyzers. In addition, this thesis contains a description of the principle of operation of the impedance analyzer, which is divided into individual function blocks and supplemented by control circuits. A large part of the work focuses on the design of the analog measurement circuit, where suitable measuring methods are also presented. The functionality of the analog blocks of the device was verified by circuit simulation in the PSpice program and by experimental tests. Selection of some components is mentioned in the relevant chapters, where the essential parameters from datasheets are listed. The output of the work deals with a designed prototype of the device, which was tested. Based on the findings some modifications of the device were proposed for practical usability. The attachment of the thesis contains final version of designed printed circuit board.
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Audio amplifier working in class AB with 400W output power
Kopic, Jan ; Šotner, Roman (referee) ; Petržela, Jiří (advisor)
The content of the thesis is the theory related to low-frequency audio amplifiers that is summarized in a separate chapter. This section describes the division of these amplifiers according to various criteria, as well as their working classes and parameters that determine their behavior. In addition, this thesis contains a description of the principle of the function of the selected class AB amplifier, which is divided into individual functional blocks and completed by the addition of speaker protection circuit. Criteria of selection for important chosen components are mentioned in appropriate chapters and supplemented with data from components datasheets. The output results of the simulations are always commented and compared with the calculated values at the end of the relevant chapter. The attachment of the thesis contains PCB design for the device realization. The correct operation of build device has been verified and measured.
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Electronic Banking
Kopic, Jan ; Pokorný, Pavel (advisor) ; Ťoukálek, Jaroslav (referee)
This thesis deals with the most significant forms of electronic banking. It focuses on their safety and their present state. The payment cards and their usage in common shops and on the Internet are analyzed. The thesis very detailed highlights problems connected with automated teller machines and it designs instruction for their safe operation. The actual situation of micropayment systems is described in detail. The head representatives are compared in light of functionality, limitations and operating fees, which are related to customers and sellers. The thesis includes the survey of current accounts intended for students in the Czech Republic, their comparison and advices for choice of the acceptable bank products.
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