|
|
Update of laboratory exercises for the course Analysis of Signals and Systems
Chrástek, Jakub ; Liska, Matej (referee) ; Krajsa, Ondřej (advisor)
My work focuses on updating selected laboratory exercises for the course Analysis of Signals and Systems. In the first half of the theoretical part, the basic concepts and subdivisions of frequency filters and their overview in terms of design type, transmitted bandwidth and approximations are presented. In the second half of the theoretical part of the thesis, basic information on aliasing is given. The practical part of the thesis focuses on calculating and optimising the values of the selected parameters. These parameters are simulated in OrCAD Capture CIS. The design part presents the source design and 3D PCB models in Fusion 360.
|
|
|
Web application for planar filter design
Sýkora, Vlastimil ; Kadlec, Petr (referee) ; Raida, Zbyněk (advisor)
This bachelor thesis deals with the development of web application for the design of planar filters. The application is written in Python. The thesis was aimed to create a script for simplified filter synthesis, based on the type of filter, its order, and chosen approximation. Initially, an equivalent circuit is constructed and a planar implementation for a given microwave substrate is proposes. The first part of the thesis is devoted to the brief theory required for the design of a simple planar circuit. The second part of this thesis deals with the development of the application itself. The function of input and ouput blocks is described here. The second part also includes description of computational scripts, including examples of the source code, for each filter type, where a different design method is used with a brief additional theory. The third part contains the design of four prototype filters of different types, their simulation in Ansys HFSS, and evaluation of obtained results.
|
|
|
Analysis of frequency and transient properties of non-integer order filters
Cieslar, Šimon ; Kubánek, David (referee) ; Koton, Jaroslav (advisor)
The bachelor thesis deals with analysis of frequency and transient properties of noninteger ( + )-order filters. These filters allow the use of a lower order, compared to the next higher integer-order ( + 1). For example, a system should be created, but a second order would not be sufficient, and in case of the integer-order, a third order system would be considered, but in the case of using a non-integer-order, a fractal-order between them can be used. In the following documentation, attention is paid to the defined group of fractal-order transfer functions, which approximate the identical course of the modulus characteristic according to Butterworth. The form of the function of the linear systems was not taken into account and characteristics such as phase response, group delay, step response and stability were analyzed and evaluated. All for the system ( + )-order, where 3, 4, variable Z1, 4 for (3 + )-order, variable Z1, 5 for (4 + )-order, and (0, 1). Non-integer systems offer a infinite number of orders, making them sometimes more advantageous in a step response or group delay. They can also provide an additional degree of freedom in designing a filter to fine-tune the slope of the amplitude characteristic in the bandwidth. The bachelor thesis deals with non-integer orders and their use in the case of required properties. For easier selection of the correct non-integer order with respect to the required properties, a design recommendation was written within the bachelor’s thesis.
|
|
|
Systematic design of pseudo-differential frequency filters
Milota, Martin ; Langhammer, Lukáš (referee) ; Sládok, Ondřej (advisor)
This bachelor thesis deals with the design and analysis of a pseudo-differential filters of higher order. This designed filters work in voltage mode and it is a second-order low-pass filter and a second-order band-stop filter. The filters use three current conveyors and four passive elements. The two lower-pass filters are cascaded together in different ways to form a fourth-order low-pass filter. The functionality of all filters is verified by simulations and low-pass filter as well as experimental measurements. Filter analysis examines the module, phase, common-mode rejection ratio, and behavior of filters while reducing optimal voltage. The results of simulations and experimental measurements are presented using the plots. The conclusion of the thesis is a successful verification functionality of the designed structure and comparison of different ways of connecting the filters to the cascade.
|
|
|
Analysis of the electronic circuits using Mathcad program
Šimůnek, Martin ; Vochyán, Josef (referee) ; Petržela, Jiří (advisor)
The main idea of this thesis is a propose by designing filters in Mathcad program. This paper deals with a basic principle in filters design and these principles are implemented into the Mathcad program. In the introductory part is described aproximation which was used in Mathcad script. In the other parts of this project is described program which was created on designed filters.
|
|
|
Analysis of frequency and transient properties of non-integer order filters
Cieslar, Šimon ; Kubánek, David (referee) ; Koton, Jaroslav (advisor)
The bachelor thesis deals with analysis of frequency and transient properties of noninteger ( + )-order filters. These filters allow the use of a lower order, compared to the next higher integer-order ( + 1). For example, a system should be created, but a second order would not be sufficient, and in case of the integer-order, a third order system would be considered, but in the case of using a non-integer-order, a fractal-order between them can be used. In the following documentation, attention is paid to the defined group of fractal-order transfer functions, which approximate the identical course of the modulus characteristic according to Butterworth. The form of the function of the linear systems was not taken into account and characteristics such as phase response, group delay, step response and stability were analyzed and evaluated. All for the system ( + )-order, where 3, 4, variable Z1, 4 for (3 + )-order, variable Z1, 5 for (4 + )-order, and (0, 1). Non-integer systems offer a infinite number of orders, making them sometimes more advantageous in a step response or group delay. They can also provide an additional degree of freedom in designing a filter to fine-tune the slope of the amplitude characteristic in the bandwidth. The bachelor thesis deals with non-integer orders and their use in the case of required properties. For easier selection of the correct non-integer order with respect to the required properties, a design recommendation was written within the bachelor’s thesis.
|
|
|
Systematic design of pseudo-differential frequency filters
Milota, Martin ; Langhammer, Lukáš (referee) ; Sládok, Ondřej (advisor)
This bachelor thesis deals with the design and analysis of a pseudo-differential filters of higher order. This designed filters work in voltage mode and it is a second-order low-pass filter and a second-order band-stop filter. The filters use three current conveyors and four passive elements. The two lower-pass filters are cascaded together in different ways to form a fourth-order low-pass filter. The functionality of all filters is verified by simulations and low-pass filter as well as experimental measurements. Filter analysis examines the module, phase, common-mode rejection ratio, and behavior of filters while reducing optimal voltage. The results of simulations and experimental measurements are presented using the plots. The conclusion of the thesis is a successful verification functionality of the designed structure and comparison of different ways of connecting the filters to the cascade.
|
|
|
Pseudo-differential Filter Using DDCCs
Sládok, Ondřej
This article describes a pseudo-differential second-order filter, using three differential difference current conveyors (DDCCs) and five passive elements. The proposed structure is able to realize all types of frequency responses. The circuit has a high input impedance, low active and passive sensitivity and high common-mode rejection ratio (CMRR).
|
|
|
Analysis of the electronic circuits using Mathcad program
Šimůnek, Martin ; Vochyán, Josef (referee) ; Petržela, Jiří (advisor)
The main idea of this thesis is a propose by designing filters in Mathcad program. This paper deals with a basic principle in filters design and these principles are implemented into the Mathcad program. In the introductory part is described aproximation which was used in Mathcad script. In the other parts of this project is described program which was created on designed filters.
|
guest ::
