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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.
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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.
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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.
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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.
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The availability of broadband in Czech Republic.
Lojka, Tomáš ; Toman, Prokop (advisor) ; Pavlíček, Antonín (referee)
The theme of this thesis is the availability of broadband in Czech Republic. There are described high-speed technologies in use in the first part. The most important mentioned technologies are wireless technologies and DSL technology. Next part is connected with concrete providers' offers and geographical availability of individual high-speed technologies. The second part of this dissertation is a proper exploration. This exploration is implemented by a question-form, which is about the situation of high-speed connection in respondents' households. The results are commented and then presented by tables and graphs. The testing and measurement of new Telefónica's naked ADSL service is also made in connection with changes in O2 ADSL service.
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