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Synthesis of the electronically reconfigurable frequency filters
Michalička, Filip ; Dvořák, Jan (referee) ; Langhammer, Lukáš (advisor)
This diploma thesis deals with design of reconection-less electronically reconfigurable filter structures which have single input and single output using unconventional active elements, which have ability to adjust one of their parameter e.g. gain or transconductance. The first part describes basic parameters of frequency filters, the division of filters by frequency transfer response and used circuit elements, their operational modes, the principle of reconnection-less electronically reconfiguration and the circuit design method MUNV. Second part describes all active elements used in the proposal of filters, their properties and the implementation using existing transistor-level models. The third part contains the design of three reconnection-less electronically reconfigurable filters and the simulations results obtained from simulation programs OrCAD Capture and PSpice. The obtained results were compared with theoretical behaviour. This part also contains results of these analyses: sensitivity, parasitic, Monte Carlo and temperature to determine the behaviour in varied cases.
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Electronically reconfigurable frequency filters
Gajdoš, Adam ; Langhammer, Lukáš (referee) ; Jeřábek, Jan (advisor)
The aim of the thesis was design of reconnection-less and electronically reconfigurable filters of SISO type with non-traditional active elements. Adjustability of bandwidth or quality factor is also required. First part of the thesis deals with theoretical analysis of filters, their operation modes and design of frequency filters using Signal-flow graph method aswell. Last but not least, electronical reconfiguration of transfer function and parasitic analysis was discussed. Another part describes active elements used in the practical part of thesis. Behaviors and design of active elements using existing circuits (e.g. UCC,EL2082) are described and their transformation into the Signal-flow graph form too. In the practical part five reconnection-less and reconfigurable filters of SISO type was designed using SNAP program. Simulations were done using Orcad program with ideal and real simulation models of active elements. Last part deals with filter design in EAGLE and experimental measurement.
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Design of electronically reconfigurable filtering structures with modern active elements
Prát, Marek ; Kubánek, David (referee) ; Langhammer, Lukáš (advisor)
The aim of master's thesis was design of electronically reconfigurable filters. Adjustability of pole frequency or quality factor is possible. First part of thesis deals with theoretical analysis of filters, their operation modes, design of frequency filters using Signal-Flow graph method and parasitic analysis. The next part describes active elements used in thesis. In a third part, three reconfigurable filters are described and designed and their simulations and parasitic analysis are made. Last part deals with filter design in EAGLE and experimental measurement.
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Design of frequency filters with non-traditional transconductance elements
Gajdoš, Adam ; Vrba, Kamil (referee) ; Jeřábek, Jan (advisor)
The aim of Bachelor’s thesis was to study, design and practically realize controllable frequency filters, working in the current mode, using non-traditional active elements, containing a combination of transconductance amplifiers with current conveyors. Thesis deals in the theoretical part with the basic division of frequency filters, operating modes of circuits and design method of signal flow graphs, which are used for design of the circuits in the practical part. The next section describes all the active elements that are used for circuits realization. In the practical part five circuits are designed with the element VDCC and one circuit with CCTA. Simulation is performed on all circuits using a previously defined model of the real UCC. Last part of thesis describes the design of the PCB and the results of experimental measurements for chosen circuit.
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Synthesis of the electronically reconfigurable frequency filters
Michalička, Filip ; Dvořák, Jan (referee) ; Langhammer, Lukáš (advisor)
This diploma thesis deals with design of reconection-less electronically reconfigurable filter structures which have single input and single output using unconventional active elements, which have ability to adjust one of their parameter e.g. gain or transconductance. The first part describes basic parameters of frequency filters, the division of filters by frequency transfer response and used circuit elements, their operational modes, the principle of reconnection-less electronically reconfiguration and the circuit design method MUNV. Second part describes all active elements used in the proposal of filters, their properties and the implementation using existing transistor-level models. The third part contains the design of three reconnection-less electronically reconfigurable filters and the simulations results obtained from simulation programs OrCAD Capture and PSpice. The obtained results were compared with theoretical behaviour. This part also contains results of these analyses: sensitivity, parasitic, Monte Carlo and temperature to determine the behaviour in varied cases.
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Design of electronically reconfigurable filtering structures with modern active elements
Prát, Marek ; Kubánek, David (referee) ; Langhammer, Lukáš (advisor)
The aim of master's thesis was design of electronically reconfigurable filters. Adjustability of pole frequency or quality factor is possible. First part of thesis deals with theoretical analysis of filters, their operation modes, design of frequency filters using Signal-Flow graph method and parasitic analysis. The next part describes active elements used in thesis. In a third part, three reconfigurable filters are described and designed and their simulations and parasitic analysis are made. Last part deals with filter design in EAGLE and experimental measurement.
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Praparation and use of α-alkylidene-β-lactams in cross-metathesis
Kretschmer, Jan ; Veselý, Jan (advisor) ; Míšek, Jiří (referee)
The main topic of this thesis was preparation of α-alkyliden-β-lactams and their use in cross metathesis in a presence of transition metal catalyst. Kinugasa reaction as well as Morita- Baylis-Hillman derivatives were used for preparation of lactams. α-alkyliden-β-lactams were used in reactions with aliphatic alkens and for study of subsituent electronic effect on lactames in cross metathesis step. The formal total synthesis of Ezetimibe was also developed in this work.
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Design of frequency filters with non-traditional transconductance elements
Gajdoš, Adam ; Vrba, Kamil (referee) ; Jeřábek, Jan (advisor)
The aim of Bachelor’s thesis was to study, design and practically realize controllable frequency filters, working in the current mode, using non-traditional active elements, containing a combination of transconductance amplifiers with current conveyors. Thesis deals in the theoretical part with the basic division of frequency filters, operating modes of circuits and design method of signal flow graphs, which are used for design of the circuits in the practical part. The next section describes all the active elements that are used for circuits realization. In the practical part five circuits are designed with the element VDCC and one circuit with CCTA. Simulation is performed on all circuits using a previously defined model of the real UCC. Last part of thesis describes the design of the PCB and the results of experimental measurements for chosen circuit.
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Electronically reconfigurable frequency filters
Gajdoš, Adam ; Langhammer, Lukáš (referee) ; Jeřábek, Jan (advisor)
The aim of the thesis was design of reconnection-less and electronically reconfigurable filters of SISO type with non-traditional active elements. Adjustability of bandwidth or quality factor is also required. First part of the thesis deals with theoretical analysis of filters, their operation modes and design of frequency filters using Signal-flow graph method aswell. Last but not least, electronical reconfiguration of transfer function and parasitic analysis was discussed. Another part describes active elements used in the practical part of thesis. Behaviors and design of active elements using existing circuits (e.g. UCC,EL2082) are described and their transformation into the Signal-flow graph form too. In the practical part five reconnection-less and reconfigurable filters of SISO type was designed using SNAP program. Simulations were done using Orcad program with ideal and real simulation models of active elements. Last part deals with filter design in EAGLE and experimental measurement.
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Category management
Beran, Jan ; Filipová, Alena (advisor)
Práce popisuje category management, jeho definice a vývoj. Stěžejní část práce se věnuje osmi krokům category management procesu a subjektům, které do tohoto procesu vstupují. Mezi osm kroku patří definování kategorie, analýza kategorie, hodnocení subjektů, stanovení cíle kategorie, taktická rozhodnutí, strategická rozhodnutí, implementace a zpětná vazba. Praktická část je zaměřena na deskripci konkrétního category management projektu a tento projekt je porovnán s teoretickými předpoklady.
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