|
|
Controlling of programmable analogue circuit
Sobotka, Josef ; Hanák, Pavel (referee) ; Vrba, Kamil (advisor)
This work deals with the design of the control software for the programmable analog circuit adjustable by means of a computer via the serial interface for the computer, as well as for programming the microcontroller. In addition, analyses the internal structure of programmable analog circuit on which it is proposed to further control, design of printed circuit boards for final programming and test equipment and measurement of the basic parameters of the circuit (transmission and phase frequency characteristics of parts and units).
|
|
|
Electrogram processing and analysis
Hanák, Pavel ; Kolářová, Jana (referee) ; Janoušek, Oto (advisor)
The aim of the study was focused on problem of electrograms recording from alive tissue. Study of electrograms recording was extended with noise analysis and its elimination. Elimination of noise and disturption was made in program Matlab; lowpass filtration and wavelet transformation was used. Application for electrograms analysis was developed in latter part of this work.
|
|
| |
|
|
Aircondition in school building
Hanák, Pavel ; Blasinski, Petr (referee) ; Rubinová, Olga (advisor)
The first part of the bachelor thesis deals with the issue of ventilation at schools. The second part deals with the design of air-conditioning for the first and second floor of the school buil-ding. The last part deals with the documentation of these air-conditioning equipment.
|
|
|
Optimization of LoRaWAN transmitter final stage
Hrbek, Tomáš ; Prokeš, Aleš (referee) ; Hanák, Pavel (advisor)
This diploma thesis deals with optimization of transmitter amplifier parameters for LoRaWAN network. The issue of optimization is first based on the conditions of ETSI EN 300 220, which takes into account the eventuality of interference the adjacent channels in the band. The optimizations are designed specifically for the Qorvo RF5110g integrated circuit, so that the amplifier meets the requirements of the above standard at the limit of the maximum allowed output power and also with respect to radio ecology.
|
|
|
Headphone amplifier with low output impedance
Zavřel, Petr ; Kubánek, David (referee) ; Hanák, Pavel (advisor)
Semestral thesis deals with design of headphone amplifier with low output impedance in audible spectre suitable for laboratory measurement. Amplifier can proces balanced and unbalanced input signal with implemented protection against damage to amplifier. Concept is designed for the lowest total harmonic distortion and signal to noise ratio of amplifier. Thesis also contains design of low-noise power supply. It works with already known circuits which was tested, improved and discused in the thesis. Thesis also deals with placement into suitable box.
|
|
|
MTC and LTC Sync Code Converter
Miškařík, Vít ; Hanák, Pavel (referee) ; Krajsa, Ondřej (advisor)
Converter of sync codes MTC to LTC is very important device to synchronize all devices which are being used for editing and other work with audio and video. Most of digital equipment can sync to MTC but LTC timecode is recorded od audio or videotape. Therefore this converter is needed to sync all connected devices to recorded timecode. This thesis is about designing and constructing the converter between these timecodes.
|
|
|
Hybrid Microphone Preamplifier
Valach, Ondřej ; Hanák, Pavel (referee) ; Koton, Jaroslav (advisor)
The diploma thesis deals with the design of hybrid microphone preamplifier with stepless choice of amplification technology between active part using tube or semiconductor elements. Before the design, the basic physical relations of electroacoustics were described. Problems of connection of audio devices, their voltage and noise conditions. At last technical properties of microphones and tubes were described. In the practical part, the overall structure of the hybrid preamplifier is designed and the goals of the thesis are set. This is followed by a detailed design of the preamplifiers. From input circuits through individual amplifier stages of the semiconductor and tube sections to the output of the device. Much of the circuit was tested by software simulations. Based on the results obtained in the design of the signal part of the preamplifier, the power circuits were designed. Finaly the preamplifier functionality was verified by measurement on the Audio Analyzer.
|
|
|
Precision audio preamplifier for headset measurement
Šimek, Michal ; Balík, Miroslav (referee) ; Hanák, Pavel (advisor)
This thesis deals with microphone and headphone preamplifier for microtelephone and headset. The design shall meet the electrical interface requirements set out in ITU-T Rec. P.381(08/2012). The design includes a voltage converter, microtelephone bias and both a battery and an external power supply. In this work is also described the design of printed circuit board and the solution of a low noise in the whole circuit. The aim of this thesis is to design, built and embed the laboratory fixture into a metal box. Finally, measure the product on an APx525 audio precision analyzer.
|
|
|
Design of measuring solutions for circuits with differential signals
Jemelík, Lukáš ; Hanák, Pavel (referee) ; Jeřábek, Jan (advisor)
This master´s thesis deals about a measuring structures of elements working at a current mode. There were outlined structures for measuring input and output impedance. These structures were simulated for DACA element. It deals with a voltage to current and current to voltage converters. All structures and converters were simulated at computer program PSpice. Selected variant were practically verified and control measuring was realized.
|
guest ::
RSS feed.