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Design of a New Filter Structure Employing Devices of Fractal Order
Detko, Adam ; Kubánek, David (referee) ; Bečková, Zuzana (advisor)
This thesis deals with fractional order analogue filtration structures. The first part focuses on theory of analog frequency filters, including fractal order. In the next part, some of the active elements that can be used in frequency filters designing are mentioned. In the third part, known integer order filtration structure working in current mode is shown, which is modified to fractal in the next part. Modification to fractional order filter is realized by the RC structure Foster I, which approximates fractal order element, also known as pseudocapacitor. This part also contains calculations. Next part contains simulation results, that have been made with ideal models of active elements. The fifth part deals with the design of original filtration structure and its subsequent modification to fractal order filtration structure. Last part contains results of simulations and their comparison with the theory and for low pass as well comparison with physically measured values.
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Pseudo-differential fractal-order frequency filters
Alkanan, Mohamad ; Dvořák, Jan (referee) ; Sládok, Ondřej (advisor)
This bachelor´s thesis deals with pseudo-differential frequency filters of fractal order. It is a proposal of non-integer order (1 + ) of pseudo-difference filter. The introduction to the theory describes the basic properties of frequency filters, their type and use. The following is a description of pseudo-differential and differential filters. The next part of the text is devoted to filters of non-integer order. Then there is a description of the current conveyors used (UCC, DVCC and DDCC). The next part of the work is devoted to the design, which is a pseudo-differential frequency filter of fractal order (1 + ) and its subsequent mathematical description in the SNAP program. The functionality and correct behavior of the filter were verified by simulations in OrCAD. The last part of the work is devoted to the practical measurement of the filter.
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Fractional-order filter structures
Lefler, Filip ; Langhammer, Lukáš (referee) ; Dvořák, Jan (advisor)
Semestral thesis deals with fractional-order frequency filters. There is descripe proposal of the filter, their simulations and practical realizations. The first part is focused at the introduction to a frequency filters. The following is chapter which explore various proposals fractional-order frequency filters. The next chapter describes used activ elements in this thesis. Then there is briefly described a method of the signal flow graphs. The following is a description of the theoretical design of lowpass and highpass frequency filter, where order of the filter is between the first and second. Another part deal with the design and simulation of the four circuits. There are two curcuits consists of transconductance amplifiers (BOTA) and two curcuist consists of current followers. The last part of the thesis deals with practical realization of the two fractional-order filters.
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Pseudo-differential fractal-order frequency filters
Alkanan, Mohamad ; Dvořák, Jan (referee) ; Sládok, Ondřej (advisor)
This bachelor´s thesis deals with pseudo-differential frequency filters of fractal order. It is a proposal of non-integer order (1 + ) of pseudo-difference filter. The introduction to the theory describes the basic properties of frequency filters, their type and use. The following is a description of pseudo-differential and differential filters. The next part of the text is devoted to filters of non-integer order. Then there is a description of the current conveyors used (UCC, DVCC and DDCC). The next part of the work is devoted to the design, which is a pseudo-differential frequency filter of fractal order (1 + ) and its subsequent mathematical description in the SNAP program. The functionality and correct behavior of the filter were verified by simulations in OrCAD. The last part of the work is devoted to the practical measurement of the filter.
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Design of a New Filter Structure Employing Devices of Fractal Order
Detko, Adam ; Kubánek, David (referee) ; Bečková, Zuzana (advisor)
This thesis deals with fractional order analogue filtration structures. The first part focuses on theory of analog frequency filters, including fractal order. In the next part, some of the active elements that can be used in frequency filters designing are mentioned. In the third part, known integer order filtration structure working in current mode is shown, which is modified to fractal in the next part. Modification to fractional order filter is realized by the RC structure Foster I, which approximates fractal order element, also known as pseudocapacitor. This part also contains calculations. Next part contains simulation results, that have been made with ideal models of active elements. The fifth part deals with the design of original filtration structure and its subsequent modification to fractal order filtration structure. Last part contains results of simulations and their comparison with the theory and for low pass as well comparison with physically measured values.
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|
|
Fractional-order filter structures
Lefler, Filip ; Langhammer, Lukáš (referee) ; Dvořák, Jan (advisor)
Semestral thesis deals with fractional-order frequency filters. There is descripe proposal of the filter, their simulations and practical realizations. The first part is focused at the introduction to a frequency filters. The following is chapter which explore various proposals fractional-order frequency filters. The next chapter describes used activ elements in this thesis. Then there is briefly described a method of the signal flow graphs. The following is a description of the theoretical design of lowpass and highpass frequency filter, where order of the filter is between the first and second. Another part deal with the design and simulation of the four circuits. There are two curcuits consists of transconductance amplifiers (BOTA) and two curcuist consists of current followers. The last part of the thesis deals with practical realization of the two fractional-order filters.
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