|
|
Wideband transimpedance photodiode amplifier
Šťastný, Martin ; Roubal, Zdeněk (referee) ; Drexler, Petr (advisor)
This thesis deals with the design of transimpedance amplifier with high gain. There are described different principles of semiconductor sensors of optical signal. There is also a comparison of different methods of converting the photocurrent to voltage. It also discusses the design of an appropriate feedback capacitor in terms of stability in participation as a transimpedance amplifier. It examines the impact of non-zero currents flowing to the input operational amplifier circuit functionality and output offset compensation. Part of the thesis is a simulation that confirms the calculated values. The thesis also deals with the implementation of the receiver and the method of correct measurement of the cut-off frequency.
|
|
|
Design and implementation of LAN home network using PLC technology
Pataj, Jiří ; Lattenberg, Ivo (referee) ; Mišurec, Jiří (advisor)
Master’s thesis deals with possibilities of data communication on low voltage power lines, so-called PLC. This technology allows data transfer on power lines. According frequency band the PLC can be subdivide into narrowband or broadband class. Given are theoretical knowledge’s of data communication on power lines and describes technical solutions. Consequently is suggestion of LAN, which is accessible for commercial usage made by DS2 and his suitable for home use. The main acquisition is implementing and measuring this experimentally created LAN in family house. The results are real bitrates depending on distance and quality of specific connection.
|
|
|
Broadband Amplifier for the Counter
Kudlička, Miroslav ; Frýza, Tomáš (referee) ; Říčný, Václav (advisor)
This work deals with possibilities design of broadband amplifier fit for the counter LCK-1. There are described three methods for possibilities solvings. The method by discretes of parts with stagger-tuned circuits, the method by operational amplifier THS3201 and the method by monolitic amplifier ERA-3. The Method by operational amplifier THS3201 is chosen like the best method, because this operational amplifier can amplify very small signals. There is designed of amplifier THS3201 in the simulation software PSpice and this results are take into account for realization broadband amplifier.
|
|
|
Broadband Plc Modul Integrated In Power Plug
Rusz, Martin
The main objective of this project is to design a functional prototype of an integrated broadband PLC module mounted in a power plug. The advantage of this device is the possibility of using PLC over the power distribution network for communication in the local home or company network and other application, without the need to connect additional equipment to the power plug.
|
|
|
Wideband transimpedance photodiode amplifier
Šťastný, Martin ; Roubal, Zdeněk (referee) ; Drexler, Petr (advisor)
This thesis deals with the design of transimpedance amplifier with high gain. There are described different principles of semiconductor sensors of optical signal. There is also a comparison of different methods of converting the photocurrent to voltage. It also discusses the design of an appropriate feedback capacitor in terms of stability in participation as a transimpedance amplifier. It examines the impact of non-zero currents flowing to the input operational amplifier circuit functionality and output offset compensation. Part of the thesis is a simulation that confirms the calculated values. The thesis also deals with the implementation of the receiver and the method of correct measurement of the cut-off frequency.
|
|
|
Concept of universal service in telecommunications in the European Union
Kondratenko, Ivan ; Cahlík, Tomáš (advisor) ; Adam, Tomáš (referee)
This thesis provides analyses of universal services in telecommunication; their meaning, approach in different countries, composition, legislation and possibilities of financing at the Europe Union level. In the first part of this work "universal service" is presented, it's definition, ways of financing this service and its components. EU legislation related to universal service is also discussed in this part. The second part of this work focuses on comparing the different approaches of EU members to universal service. In the following two chapters there is an analyses of related low compounds of universal service and methods of financing it in the Czech Republic and Slovakia. Following chapter talks about broadband as a possible new element to be included into the concept of universal service. In the conclusion, perspective of the future and results of this work are presented. Universal service is not valued in lots of countries, as regulation of telecommunications is cut down and involving broadband in universal service would be meaningless with respect to the almost perfect covering of the European Union. The aim of this bachelor thesis is the provision of a global outlook to the issues of universal service and analyses of it's components in the European Union.
|
|
|
Broadband Amplifier for the Counter
Kudlička, Miroslav ; Frýza, Tomáš (referee) ; Říčný, Václav (advisor)
This work deals with possibilities design of broadband amplifier fit for the counter LCK-1. There are described three methods for possibilities solvings. The method by discretes of parts with stagger-tuned circuits, the method by operational amplifier THS3201 and the method by monolitic amplifier ERA-3. The Method by operational amplifier THS3201 is chosen like the best method, because this operational amplifier can amplify very small signals. There is designed of amplifier THS3201 in the simulation software PSpice and this results are take into account for realization broadband amplifier.
|
|
|
Design and implementation of LAN home network using PLC technology
Pataj, Jiří ; Lattenberg, Ivo (referee) ; Mišurec, Jiří (advisor)
Master’s thesis deals with possibilities of data communication on low voltage power lines, so-called PLC. This technology allows data transfer on power lines. According frequency band the PLC can be subdivide into narrowband or broadband class. Given are theoretical knowledge’s of data communication on power lines and describes technical solutions. Consequently is suggestion of LAN, which is accessible for commercial usage made by DS2 and his suitable for home use. The main acquisition is implementing and measuring this experimentally created LAN in family house. The results are real bitrates depending on distance and quality of specific connection.
|
|
|
Analýza trhu vysokorychlostního připojení k internetu v ČR
Poloczek, Bronislav ; Toman, Prokop (advisor) ; Sigmund, Tomáš (referee)
The objective of the thesis is to provide a view of the situation in high-speed Internet connection in the Czech Republic. At the beginning we present a history of internet and describes in particular the most frequently used technology of high-speed connectivity to the Internet. This is followed by a comparison of the current supply and demand in a market of Internet connection in the Czech Republic. This study not only compare technological aspects, but takes into consideration the economic situation, government regulations and changes from 2009 as well. Finally, there is a summarization and an evaluation of the results and a reflection on possible future on a market of high-speed connection in Czech republic.
|
|
|
Analysis of current mobile operator selected services
Havlíčková, Klára ; Toman, Prokop (advisor) ; Hirsch, Jan (referee)
The theme of the thesis is an analysis of current mobile operator selected services. This work focuses on the present and the future development of mobile internet connection. The aim is to analyze existing services at Telefónica Czech Republic and The work is divided into several parts. The first part focuses on the selection of a particular operator. I described at al. Czech Republic and Telefónica, which is the first integrated operator in the Czech Republic. The company currently operates more than seven million mobile numbers and fixed lines, making it one of the leading providers of fully converged services in Europe. I focused on the organizational structure of the company and its description. The second part is historical, describes the history of mobile networks in the CR, the history of mobile communications in the data and the development of mobile connections in the country. The third part is theoretical, describes al. Czech Republic Telefonica SpA in terms of services it offers in this section is also described ISO certification, EMS policy and business principles. Are described voice and mobile services, mobile data services and connectivity technologies and different types of technologies (GSM, GPRS, EDGE, UMTS, HSDPA, HSPA + and LTE). Another section includes the development of mobile connections in the CR, the current situation where Telefónica provides 3G connection for almost 71% of the population and the current state of commercial LTE network. I tried to describe the current mobile platforms, and even telecommunications market in the Czech Republic. The penultimate section specifies the geographic traffic distribution network operator and the last part, I dealt with the analysis and comparison services. The total contribution of the thesis see the approach and evaluation of existing services together. Telefónica Czech Republic, as, which is one of the largest telecommunications companies in the world.
|
guest ::
