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Surface Plasmon Resonances on Colloidal Nanoparticles
Beránek, Jiří ; Brzobohatý,, Oto (referee) ; Šikola, Tomáš (advisor)
The presented diploma thesis is focused on the Localized Surface Plasmons (LSP). The far-field optical response of the colloidal solutions of gold nanoparticles caused by LSP was investigated and compared with the numerical calculations. For the simulations, the Discrete Dipole Approximation (DDA) and Finite-Difference Time Domain (FDTD) techniques were employed. In particular, the shape and size effects of spherical particles and nanorods were studied. The simulations performed by both methods are in a good agreement for the spheres. For the nanorods, the resonance was found to be affected markedly by their geometry. Also, broader resonance peaks were found. This effect was assigned to the sample size distribution and its influence is discussed by comparing the simulations with experiments. In addition, synthesis of nanorods was carried out as well. Finally, the results on the study of optical properties of silver clusters formed under equilibrium conditions are presented.
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Design of Differential Difference Amplifier in CMOS technology
Trojan, Vladimír ; Khateb, Fabian (referee) ; Kledrowetz, Vilém (advisor)
The bachelor's thesis deals with the design of differential difference amplifier (DDA) in technology TSMC 0,18 with maximum input and output common mode range, minimum power dissipation and area on chip. The thesis describes the basics of CMOS technology, commonly used structures of analog integrated circuits and operational amplifiers. Main focus of the thesis is design of circuit of DDA. Designing and simulations of DDA parameters were made in program Cadence Virtuoso and ADE Assembler simulation environment. Layout of DDA was designed in Layout XL environment.
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Design of differential difference amplifier (DDA) for biological signals processing
Grochal, Peter ; Šteffan, Pavel (referee) ; Khateb, Fabian (advisor)
The work deals with the analog design of low-voltage and low-power differential difference amplifier DDA with adaptive differential input stage, second stage class AB, improved by a self – cascode to achieve higher gain and slew rate. Conventional and unconventional techniques, and methods for low-voltage and low-power design are presented. The finished design of the differential difference amplifier DDA with the analyzed results is presented. Design of a Butterwortho low-pass filter of the sixth order based on DDA with Sallen Key topology and design of a multifunctional ARC filter based on DDA.
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Teaching aids for 2D computer graphics
Malina, Jakub ; Průša, Zdeněk (referee) ; Rajmic, Pavel (advisor)
In this master’s thesis we focus on the basic properties of computer curves and their practical applicability. We explain how the curve can be understood in general, what are polynomial curves and their composing possibilities. Then we focus on the description of Bezier curves, especially the Bezier cubic. We discuss in more detail some of fundamental algorithms that are used for modelling these curves on computers and then we will show their practical interpretation. Then we explain non uniform rational B-spline curves and De Boor algorithm. In the end we discuss topic rasterization of segment, thick line, circle and ellipse. The aim of master’s thesis is the creation of the set of interactive applets, simulating some of the methods and algorithm we discussed in theoretical part. This applets will help facilitate understanding and will make the teaching more effective.
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Design of differential difference amplifier in CMOS technology
Slaninka, Leonard ; Prokop, Roman (referee) ; Kledrowetz, Vilém (advisor)
Bachelor’s thesis is focused on theoretical analysis of parameters and properties of CMOS technology, and its use for differentially difference amplifier design. The thesis is concentrated on MOS transistor behaviour in different work regimes depending on the voltage UGS, it is also covering work regimes in relation to difference of voltages UDSsat and UDS. In the end of theoretical part there are listed and briefly described basic building blocks for amplifiers. Design is carried out in Cadence Virtuoso environment using ONC25 (250 nm) technology. DDA is supplied by asymmetrical voltage of 5 V and for the design are used standard threshold transistors.
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Design of Differential Difference Amplifier in CMOS technology
Trojan, Vladimír ; Khateb, Fabian (referee) ; Kledrowetz, Vilém (advisor)
The bachelor's thesis deals with the design of differential difference amplifier (DDA) in technology TSMC 0,18 with maximum input and output common mode range, minimum power dissipation and area on chip. The thesis describes the basics of CMOS technology, commonly used structures of analog integrated circuits and operational amplifiers. Main focus of the thesis is design of circuit of DDA. Designing and simulations of DDA parameters were made in program Cadence Virtuoso and ADE Assembler simulation environment. Layout of DDA was designed in Layout XL environment.
|
|
|
Design of differential difference amplifier (DDA) for biological signals processing
Grochal, Peter ; Šteffan, Pavel (referee) ; Khateb, Fabian (advisor)
The work deals with the analog design of low-voltage and low-power differential difference amplifier DDA with adaptive differential input stage, second stage class AB, improved by a self – cascode to achieve higher gain and slew rate. Conventional and unconventional techniques, and methods for low-voltage and low-power design are presented. The finished design of the differential difference amplifier DDA with the analyzed results is presented. Design of a Butterwortho low-pass filter of the sixth order based on DDA with Sallen Key topology and design of a multifunctional ARC filter based on DDA.
|
|
|
Surface Plasmon Resonances on Colloidal Nanoparticles
Beránek, Jiří ; Brzobohatý,, Oto (referee) ; Šikola, Tomáš (advisor)
The presented diploma thesis is focused on the Localized Surface Plasmons (LSP). The far-field optical response of the colloidal solutions of gold nanoparticles caused by LSP was investigated and compared with the numerical calculations. For the simulations, the Discrete Dipole Approximation (DDA) and Finite-Difference Time Domain (FDTD) techniques were employed. In particular, the shape and size effects of spherical particles and nanorods were studied. The simulations performed by both methods are in a good agreement for the spheres. For the nanorods, the resonance was found to be affected markedly by their geometry. Also, broader resonance peaks were found. This effect was assigned to the sample size distribution and its influence is discussed by comparing the simulations with experiments. In addition, synthesis of nanorods was carried out as well. Finally, the results on the study of optical properties of silver clusters formed under equilibrium conditions are presented.
|
|
|
Teaching aids for 2D computer graphics
Malina, Jakub ; Průša, Zdeněk (referee) ; Rajmic, Pavel (advisor)
In this master’s thesis we focus on the basic properties of computer curves and their practical applicability. We explain how the curve can be understood in general, what are polynomial curves and their composing possibilities. Then we focus on the description of Bezier curves, especially the Bezier cubic. We discuss in more detail some of fundamental algorithms that are used for modelling these curves on computers and then we will show their practical interpretation. Then we explain non uniform rational B-spline curves and De Boor algorithm. In the end we discuss topic rasterization of segment, thick line, circle and ellipse. The aim of master’s thesis is the creation of the set of interactive applets, simulating some of the methods and algorithm we discussed in theoretical part. This applets will help facilitate understanding and will make the teaching more effective.
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|
|
Teaching aids for 2D computer graphics
Malina, Jakub ; Průša, Zdeněk (referee) ; Rajmic, Pavel (advisor)
In this master’s thesis we focus on the basic properties of computer curves and their practical applicability. We explain how the curve can be understood in general, what are polynomial curves and their composing possibilities. Then we focus on the description of Bezier curves, especially the Bezier cubic. We discuss in more detail some of fundamental algorithms that are used for modelling these curves on computers and then we will show their practical interpretation. Then we explain non uniform rational B-spline curves and De Boor algorithm. In the end we discuss topic rasterization of segment, thick line, circle and ellipse. The aim of master’s thesis is the creation of the set of interactive applets, simulating some of the methods and algorithm we discussed in theoretical part. This applets will help facilitate understanding and will make the teaching more effective.
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