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Fully-differential current mode frequency filters
Kubík, Milan ; Koton, Jaroslav (referee) ; Jeřábek, Jan (advisor)
The bachelor thesis focuses on design of fully-differential frequency filters in current mode. First part informs about problems concerning frequency filters and creating differential structures in current mode. Second part deals with used active components - Digitally Controlled Current Amplifier (DCCA) and Multiple Output Current Follower (MO-CF). Key point is own design of differential filters, which is divided into three parts. In the first part of design results there are filters obtained with help of models from FilterPro software. There are presented circuit structures implementing low pass, high pass and band pass frequency filters. At the next part two filters derived from autonomous circuits. These circuits are working as low pass and high pass frequency filters. In the last part are designed two types of integrator type components – loss integrator and lossless integrator. These circuits were used to realize cascade connection achieving three filtering function – band pass 1, band pass 2 and low pass. Final part summarises the thesis and features of designed structures.
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Differential frequency filters with modern active elements
Kubík, Milan ; Vrba, Kamil (referee) ; Jeřábek, Jan (advisor)
The master thesis focuses on design of fully-differential frequency filters with modern active components in current mode. First part informs about problems concerning analogue frequency filters and creating differential structures. Second part deals with methods of create filters and used active components - DACA (Digital Adjustable Current Amplifier) and MO-CF (Multiple Output Current Follower). Own design of differential filters is divided on two parts. In the first part of design results there are filters created with synthetic higher-order elements. There are presented circuit structures implementing the third order low pass filter and high pass filter. In the second part are designed filters with signal flow graphs. The first circuit implementing low pass, high pass, band pass, band rejection and all-pass filter. The second circuit is with help of the same set of current amplification by DACA components tuning of the natural frequency. For this circuit was make sensitivity analysis. In the final part is practical implementation of the differential frequency filter for tuning of the natural frequency and summarises the thesis.
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Synthesis of differential filtering structures with complex active elements
Pánek, David ; Kubánek, David (referee) ; Langhammer, Lukáš (advisor)
This document is focused on already existing single-ended frequency filters with modern active components working in current mode and their modification into fully-differential ended form. After the modification both versions were compared between each other. The first part informs about problems concerning analogue frequency filters. The second part deals with used active components - MO-CF (Multiple Output Current Follower), BOTA (Balanced transconductance amplifier), UCC (universal current conveyor), VDTA (Voltage differencing transconductance amplifier), CDTA (Current differencing transconductance amplifier) and VDCC (voltage differencing current conveyor). Four circuits have been chosen and transformed into their differential form. Two circuits have been chosen and realised into PCB and then practicaly measured in a laboratory. The last part is a summary of simulations and measured results and check of circuits behavior result.
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Design of pseudo-differential frequency filters using conveyors
Hýl, František ; Langhammer, Lukáš (referee) ; Sládok, Ondřej (advisor)
This bachelor thesis deals with a second order pseudo-differential frequency filter operating in voltage mode. It also describes various types of frequency filters and their characteristics. It contains a summary of the differences between Pseudo-differential, fully differential and non-differential filters and their involvement. The pseudo-differential filter of the high-pass type is devoted to chapters of design, simulation and measurement.
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Synthesis of differential filtering structures with complex active elements
Pánek, David ; Kubánek, David (referee) ; Langhammer, Lukáš (advisor)
This document is focused on already existing single-ended frequency filters with modern active components working in current mode and their modification into fully-differential ended form. After the modification both versions were compared between each other. The first part informs about problems concerning analogue frequency filters. The second part deals with used active components - MO-CF (Multiple Output Current Follower), BOTA (Balanced transconductance amplifier), UCC (universal current conveyor), VDTA (Voltage differencing transconductance amplifier), CDTA (Current differencing transconductance amplifier) and VDCC (voltage differencing current conveyor). Four circuits have been chosen and transformed into their differential form. Two circuits have been chosen and realised into PCB and then practicaly measured in a laboratory. The last part is a summary of simulations and measured results and check of circuits behavior result.
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Design of pseudo-differential frequency filters using conveyors
Hýl, František ; Langhammer, Lukáš (referee) ; Sládok, Ondřej (advisor)
This bachelor thesis deals with a second order pseudo-differential frequency filter operating in voltage mode. It also describes various types of frequency filters and their characteristics. It contains a summary of the differences between Pseudo-differential, fully differential and non-differential filters and their involvement. The pseudo-differential filter of the high-pass type is devoted to chapters of design, simulation and measurement.
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Fully-differential current mode frequency filters
Kubík, Milan ; Koton, Jaroslav (referee) ; Jeřábek, Jan (advisor)
The bachelor thesis focuses on design of fully-differential frequency filters in current mode. First part informs about problems concerning frequency filters and creating differential structures in current mode. Second part deals with used active components - Digitally Controlled Current Amplifier (DCCA) and Multiple Output Current Follower (MO-CF). Key point is own design of differential filters, which is divided into three parts. In the first part of design results there are filters obtained with help of models from FilterPro software. There are presented circuit structures implementing low pass, high pass and band pass frequency filters. At the next part two filters derived from autonomous circuits. These circuits are working as low pass and high pass frequency filters. In the last part are designed two types of integrator type components – loss integrator and lossless integrator. These circuits were used to realize cascade connection achieving three filtering function – band pass 1, band pass 2 and low pass. Final part summarises the thesis and features of designed structures.
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|
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Differential frequency filters with modern active elements
Kubík, Milan ; Vrba, Kamil (referee) ; Jeřábek, Jan (advisor)
The master thesis focuses on design of fully-differential frequency filters with modern active components in current mode. First part informs about problems concerning analogue frequency filters and creating differential structures. Second part deals with methods of create filters and used active components - DACA (Digital Adjustable Current Amplifier) and MO-CF (Multiple Output Current Follower). Own design of differential filters is divided on two parts. In the first part of design results there are filters created with synthetic higher-order elements. There are presented circuit structures implementing the third order low pass filter and high pass filter. In the second part are designed filters with signal flow graphs. The first circuit implementing low pass, high pass, band pass, band rejection and all-pass filter. The second circuit is with help of the same set of current amplification by DACA components tuning of the natural frequency. For this circuit was make sensitivity analysis. In the final part is practical implementation of the differential frequency filter for tuning of the natural frequency and summarises the thesis.
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