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Design of frequency filters with active current element
Polášek, Lubomír ; Herencsár, Norbert (referee) ; Vrba, Kamil (advisor)
In my bachelor's thesis I deal with the matter of frequency filters, how to use them, types of transferential functions and various types of approximation that can be used in the design. The next part of my thesis describes various types of active elements, either voltage or current or those working in a mixed mode. My thesis also deals with various techniques that we can use when creating frequency filters. In the final part of my thesis I introduce a scheme of an ideal current amplifier and several possible connexions of autonomous circuits with this element. Several suggestions have been shown, as well as final simulations in a OrCAD software and a possible realization of input and output impedance of a PCA element.
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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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Design of frequency filters with active current element
Polášek, Lubomír ; Herencsár, Norbert (referee) ; Vrba, Kamil (advisor)
In my bachelor's thesis I deal with the matter of frequency filters, how to use them, types of transferential functions and various types of approximation that can be used in the design. The next part of my thesis describes various types of active elements, either voltage or current or those working in a mixed mode. My thesis also deals with various techniques that we can use when creating frequency filters. In the final part of my thesis I introduce a scheme of an ideal current amplifier and several possible connexions of autonomous circuits with this element. Several suggestions have been shown, as well as final simulations in a OrCAD software and a possible realization of input and output impedance of a PCA element.
|
|
|
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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