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Module for remote access via Ethernet
Pospíšil, Martin ; Šrámek, Petr (referee) ; Prokeš, Aleš (advisor)
This thesis is about creation of control software (firmware) for remote access unit, using ethernet for communication. It implements web interface for control and monitoring of connected device, which requires both digital and analog signals for control. Hardware is based on C8051F120 as main microcontroller and CP2200 as ethernet controller. Thesis briefly describes most important protocols used in this system and examines features of the Silicon Laboratories TCP/IP stack.
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Ultra low noise switching power supply
Raba, Jaroslav ; Leuchter,, Jan (referee) ; Šrámek, Petr (advisor)
This thesis deals with the issue of switching power supply in terms of noise ratios in the output voltage. In the theoretical part analyzes the basic principle of classical and resonant topology switching power converters in terms of output voltage ripple and switching noise. There are also some possibilities of compensation to minimize switching noise and output ripple. The second part describes the custom design a low noise switching power supply, which is composed of an active power factor corrector, power converters and ripple limiter. The main power converter is designed as an LLC resonant converter. The last part deals with the actual construction of the proposed source, its measurement and presentation of the results.
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Software defined transceiver for radio amateur use
Paus, Anton ; Povalač, Karel (referee) ; Žalud, Václav (referee) ; Šrámek, Petr (advisor)
This project deals with possibilities of using the software defined radio conception for radio amateur use in a short wave band and its subsequent implementation into properly designed hardware. The aim of this work is to design a transceiver that would be capable of working in AM, FM, SSB, and CW modes. Within a theoretical part of the project the architectures of software defined radios and their components are discussed. This part was focused mainly on analog parts of the chain, such as amplifiers, filters and converters. Signal processing algorithms for both receiver and transmitter working in desired modes are studied subsequently and their computer models are built. Designed algorithms are implemented into FPGA structure (Virtex -5).
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Front end for software receiver
Slezák, Jakub ; Horský, Pavel (referee) ; Šrámek, Petr (advisor)
This thesis deals with a theoretical analysis of the basic parameters of receivers, input circuit architecture and signal digitization. According to the specified assignment it is outlined block scheme of front end for software receiver with specified components and the total bilance is calculated. Individual parts of the system are designed and realized. This is a set of four input filters for bandwidths: short waves up to 30 MHz, 87,5-108 MHz, 144-148 MHz and 174-230 MHz. The main point of design is a circuit containing a low-noise amplifiers, switches, and two amplifiers with adjustable amplification. Mainly are used integrated circuits from Analog Devices corporation. To control the various switches and adjustable amplifiers was designed a separate panel, which is connected to the main circuit via a cable. In the last phase was the whole system and its components subjected to measurements. Thanks to a number of mounted SMA connectors it is possible to measure different parts of the system and we are able to modify it partially.
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HF band power amplifier
Korvas, Miroslav ; Zamazal, Michal (referee) ; Šrámek, Petr (advisor)
The theme of my diploma thesis is a realization of the high frequency amplifier with possibility to change its class between class A, B and C with output low pass and band pass filters. The output power is supposed to be at about 10 W in frequency range 3,5 MHz to 14 MHz. The thesis contains theory of amplifier respectively transceiver and filters. In next parts I will design, simulate, realize and measure created amplifier and filters.
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Implementation of software radio into FPGA
Šrámek, Petr ; Maršálek, Roman (referee) ; Prokeš, Aleš (advisor)
The common objective of this project is implementation of software defined radio (SDR) into FPGA. The text contains review and comparison of several hardware concepts intended for SDRs implementation then the methods for digital implementation of various components of radios as the filters, mixers and others are mentioned. Part of the text introduces used hardware platform and describes software support for designing, simulations and implementation into hardware. Significant part of project describes complex of external hardware components as filter, amplifier and control panel designed and built within the project realization. But the main part of project demonstrates design of the software solution of radio receiver. There is specified architecture of radio for FM broadcast receiving, next the more complex systems with carrier recovery algorithm are presented. These systems are able to work with AM, BPSK and QPSK modulations. It is possible to implement all these receivers into hardware and verify their operation. The practical laboratory theme has been outlined within the project run.
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U.S.-China Relations In the Post-Bipolar World
Šrámek, Petr ; Matějka, Zdeněk (advisor) ; Knotková, Vladimíra (referee)
In my thesis, I analyze the foreign policy of George H. W. Bush, Bill Clinton, George W. Bush and Barack Obama in 1989-2010. Upon comparing their China policies, I concluded that the approach of the United States to China is inconsistent, mainly due to the changing patterns of power, conflicting value systems and the growing importance of commercial interests in the relationship.
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Human resource management
ŠRÁMEK, Petr
Thesis is bent on domain human resource management, personal management and personal activities, monitoring labour costs, comparison with labour costs in Czech republic and European union and their control as one of presumptions of efficient managemet and successful realization company aims.
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Systém řízení kvality v malých auditorských společnostech
Vanská, Vilma ; Králíček, Vladimír (advisor) ; Šrámek, Petr (referee)
Diplomová práce je zaměřena na aktuální problematiku řízení kvality v prostředí auditorských firem. Cílem práce je, na základě požadavků mezinárodních standardů pro auditory, vytvořit návodný postup při řízení kvality pro malou auditorskou společnost v ČR. Práci tvoří dvě ucelené části, v té první jsou definovány požadavky různých profesních předpisů v této oblasti. Druhá část poskytuje informace z praxe a pokračuje manuálem, podle něhož může malá auditorská firma postupovat.
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Finanční analýza podniku cestovního ruchu
Šrámek, Petr ; Petrů, Zdenka (advisor) ; Badrún, Adam (referee)
Finanční analýza podniku cestovního ruchu zkoumá finanční situaci největší cestovní kanceláře na českém trhu - Čedoku a.s. Je zaměřena z pohledu investora, tedy především na analýzu rentability a její podrobné rozklady logaritmickou metodou, dále na ekonomickou přidanou hodnotu EVA a vybrané souhrnné indexy hodnocení podniku. Diplomová práce ale nejen hodnotí vlastní situaci podniku, nýbrž i poukazuje na specifika, odlišnosti hospodaření podniků cestovního ruchu.
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