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Differential structures of linear circuits using DDCCs and DVCCs
Sládok, Ondřej ; Jeřábek, Jan (referee) ; Koton, Jaroslav (advisor)
This bachelor´s thesis deals with the differential structures of the linear circuits with DVCCs and DDCCs elements. The introductory part of the thesis deals with the description of the frequency filters. Significant emphasis is put on the active current conveyors. Futhermore, the text focuces on issue of differential structures. The main aim is the transformation of the nondifferential structure to the differential structure using the differential current conveyores and the comparison with the nondifferencial structure.
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Active Frequency Filters with Minimal Configuration
Preclík, Milan ; Jeřábek, Jan (referee) ; Koton, Jaroslav (advisor)
This work deals with exploitation of multiple current and voltage gates of active components. After that an optimal circuit´s scheme choice, its simulation and subsequent realization of frequency filter follow. First of all there is a common description of frequency filters and current and voltage conveyors. Furthermore the text focuses on searching circuit´s schemes of second-level frequency filters, described by characteristical equation. These equation make an easy numerical concept possible. New circuits with one active component and with a minimal number of pasive components are searched by using the method of autonomous circuits. The choice of resulting circuit based on simulations executed in Orcad is next in line. The work concludes with verification of a proper function of our filter.
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Current mirror higher-order filters
Novotný, Matouš ; Herencsár, Norbert (referee) ; Lattenberg, Ivo (advisor)
Submitted work engages in suggestion of frequency-selection filters with usage of more active elements of the MCMI (Multi-Output Current Mirror and inverter). The preamble of thesis is applied to theory of frequency-selection filters and possible usage of them. The projected circuit layouts with the active elements are discussed in terms of the impact of parasitic properties of the real models. The part of thesis is numerical suggestion of found solutions, their simulation in suitable program.
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Design of tunable frequency filters with modern current active elements
Stejný, Jiří ; Herencsár, Norbert (referee) ; Jeřábek, Jan (advisor)
This master´s thesis deals an active elements called digitally controlled current amplifier, multiple-output current follower and its usage in tunable frequency filters. These tunable frequency filters operate in a pure current mode. In the first part of this work are presented the different types of current active elements. Universal current conveyor, multiple-output current follower, digitally controlled current amplifier (UCC, MO-CF, DCCA). In the second part of this work are introduced particular methods of design tunable frequency filters. Special attention is given to using the design method of via autonomous circuits because it is one of the most. In the last part of this thesis are designed and computer-simulated individual multifunction tunable frequency filters with those already active yet elements. These filters were designed via autonomous circuits or modification of existing circuits. The functionality of the proposed filtres have been verified by computer simulation. Snap3 program was used for the symbolic analyse of circuit and OrCad PSpice program was used to simulate the characteristics of multifunction filters.
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