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Spring reverb
Hroch, Matěj ; Dvořák, Jan (referee) ; Kubánek, David (advisor)
Bachelor thesis deals with design of analog reverb effect. Specifically, it deals with effect, where the reverbation is simulated by spring reverb tank. Thesis contains design of excitating and sensing circuits, also impedance and transmission features measuring. Final device should be compatible with common used audio devices. Reverb design is improved by adding noise gate and feedback. The thesis contains desingn of PCB and whole device construction. Features measuring is also contained. For retro design, VU meters circuits are added. The thesis contains already known circuits, which were tested and improved.
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Flanger music effect
Válek, Tomáš ; Hanák, Pavel (referee) ; Kubánek, David (advisor)
This thesis describes the properties and principle of delay line effects. The flanger effect is then described from the theoretical side down to the circuit level and designed at the circuit level including component parameters. The flanger design was simulated using LTspice and the results analyzed. For this design, a printed circuit board was designed in Autodesk Fusion. Afterwards, the flanger was constructed as a laboratory device and its measured parameters were compared with the simulations. Eventually, a measurement guide and a sample measurement report were created for it.
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Wah-Wah type guitar effects
Kramný, Bořivoj ; Koton, Jaroslav (referee) ; Kubánek, David (advisor)
This paper deals with kind of guitar effects called Wah-Wah. It explains the theory of filter and analog components to form the filter. Based on simulations, this paper describes functions and nature of parts or particular components of the schematic, based on the circuit made by the VOX company. Next, there is described the design simulation of a laboratory preparation, enabling to measure and to learn the function of the effect.
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Tube microphone
Kupka, Šimon ; Kubánek, David (referee) ; Koton, Jaroslav (advisor)
This thesis is focused on the principle of a vacuum tube condenser microphone. It takes a closer look at the Telefunken ELA M-251E microphone and explores the possibility of extending its circuit by additional diaphragm. In the design of such a solution, simulation is used to verify the assumptions. Subsequently, the thesis deals with the selection of suitable components, the actual construction of the microphone and the measurement of its key properties.
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Design of a measuring unit for smart agriculture
Kostelanská, Alžbeta ; Kubánek, David (referee) ; Herencsár, Norbert (advisor)
The Master's thesis is dealing with the design of an intelligent measuring unit aimed at the field of smart agriculture. The proposed measuring unit is intended to provide automated measurements and monitoring of plant conditions utilizing electrical bioimpedance spectroscopy. In the theoretical part of the thesis, the concept of bioimpedance is introduced, the main focus is on the interpretation of its value in the context of agriculture. The practical part of the thesis is dealing with the design and implementation of a prototype impedance analyzer which utilizes an integrated analogue impedance interface. The output of the thesis is a prototype of the measuring unit and an interface for visualization of the measured data. The conclusion of the thesis is devoted to the evaluation of the results of the measurements, which have been conducted by the constructed prototype.
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Noise Analysis of Basic Circuits for Analog Signal Processing
Humpolíková, Michaela ; Sládok, Ondřej (referee) ; Kubánek, David (advisor)
The cause of noise in analog circuits is a problem of quality in output signals. There are many reasons of its occurrence, noise is caused by components connected into the circuit, and the assembly itself. This bachelor thesis summarizes the theoretical knowledge about noise analysis. Noise measurement in circuits can now be calculated with PSpice, the results are used for the design of low noise circuits. In the contained practical analysis of the circuits were achieved the results for the suitable designing of low noise circuits.
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DC/DC converter 12V/300V
Žurek, Jan ; Hanák, Pavel (referee) ; Kubánek, David (advisor)
This Bachelor´s Thesis is about switch power supplies theory. It contains comparation with power supplies made of linear components and briefly describes principals of each type. Bigger attention is devoted to fly-back engagement, on which´s basic is then in practice designed particular switch power supply. All key components are counted, including initiation of important species interaction, especially of transformator, MOSFET semiconductor triode, output diode, and there are chosen important components, which are subsequently implemented into the particular switch power supply engagement. This blocking engagement turned out to be functionless. That was why I decided to use engagement called half-bridge, which was viable.
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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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Diode shaping circuits for generators of periodic signals
Podhorský, Jiří ; Kubánek, David (referee) ; Koton, Jaroslav (advisor)
Subject of this bachelor’s thesis is designing two types of nonlinear diode shaping circuits for generators of triangle periodic signals. Thesis consists of diode circuit theoretical analysis and their design and calculation of circuit singles elements. After design printed circuit boards, complementing and recovery equipment, was made laboratory measurements of harmonic distortion. The results of measurements were compared with specified parameters and in conclusion was determined that specified parameters were fulfilled.
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