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Frequency Filters with Controllable Current Followers
Novotný, Matouš ; Herencsár, Norbert (referee) ; Koton, Jaroslav (advisor)
Submitted work engage in suggestion and realization of frequency-selection filters with usage one or more active devices CMI (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 are discussed next to would be possible change some of choice parameters of frequency-selection filter. The part of thesis is numerical suggestion of found solutions, their simulation in suitable program and realization.
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Design of adjustable fully-differential filters with current active elements
Polášek, Lubomír ; Koton, Jaroslav (referee) ; Jeřábek, Jan (advisor)
The master thesis deals with design of the fully differential frequency filters working in the current mode and is focused on possibilities of the natural frequency and the quality factor adjustment. At the beginning, there is a brief description of frequency filters and active elements (MO-CF, FD-CF and DACA), which are used in the thesis. Furthermore, simplified signal flow graphs design method and transformation of passive and active elements to the differential structures are described. The designs of four differential circuitries which provide possibility of tuning the natural frequency or quality factor by the gain of the DACA element are shown in the thesis. Simulation results made in OrCAD program with help of third-order models are included. The practical implementation of the differential frequency filter for tuning of the natural frequency by the DACA elements is shown in the last chapter.
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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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Aperture Corrector for Video Signals
Klozar, Lukáš ; Slanina, Martin (referee) ; Říčný, Václav (advisor)
Aim of this bachelor thesis is detail description and design aperture correction of video signals. Following theory of possibilities of aperture correction, realize corrector and verify it‘s function. Input signal of aperture corrector is luminance signal of video signal. It’s function is to reduce duration of signal edges. Attention si mainly give to derivative way of correction. Text describes theory of apperture correctnion of video signals and way of corrections. Derivative aperture corrector is detaily described, designed and simulated on PC, including constructional features. The last part is aimed at construction and comparing of measured and simulated processes .
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