National Repository of Grey Literature 8 records found  Search took 0.02 seconds. 
Class AB audio amplifier for two satellites and subwoofer
Cupák, Jan ; Brančík, Lubomír (referee) ; Kratochvíl, Tomáš (advisor)
This bachelor’s thesis deals with design of AB class audio amplifiers. Further more it deals also with other functional blocks, e.g. preamplifier, tone equalizer and active crossover. Outcome of this work is a complete solution of the amplifier with it's simulation. In final solution is also included scheme of a high quality power supply unit, speaker protection and heat sinks for high performance transistors. In this project is also included a solution of task about optimal mechanical arrangement of the single parts in the case of this amplifier. This thesis contains results of measurement and photo document of functional prototype.
Hybrid headphone amplifier for the high-end listening and performance
Čacký, Adam ; Šotner, Roman (referee) ; Kratochvíl, Tomáš (advisor)
This bachelor´s thesis describes the design of a high quality small portable headphone amplifier for dynamic headphones. Part of the work is theoretical assumptions for the optimal design and implementation of peripheral involvement, comparing the properties of components used and the resulting parameters of modeled device. Analyses of the electrical quantities of the circuit created in simulation software are enclosed.
Eliminator of dental calculus
Halaš, Rostislav ; Čížek, Martin (referee) ; Rozman, Jiří (advisor)
Tato práce se zabývá návrhem ultrazvukového odstraňovače zubního kamene pracujícím na frekvenci 27 kHz s maximální intenzitou ultrazvuku 5W/cm2. Popisuje mechanismus vzniku zubního kamene, důsledky na zdraví a metody jeho odstraňování. Zaměřuje se na principy odstraňování s využitím ultrazvukového vlnění. Dále je sestaveno funkční a blokové schéma. Na základě těchto znalostí je proveden návrh a výpočet jednotlivých částí aplikátoru. Výkonové a napěťové poměry jsou vypočítány od aplikačního hrotu směrem ke generátoru. V neposlední řadě je popsán návrh obvodů buzení měniče i kontrolních obvodů. Schémata jsou doplněna výkresy desek plošných spojů a soupiskou součástek.
Multichannel RF power meter
Hradňanský, Vladimír ; Povalač, Aleš (referee) ; Šebesta, Jiří (advisor)
In this work is an analysis of methods for measuring high-frequency power, then the design and implementation of multi-channel processor controlled high-frequency power meter. The device enables communication via USB or RS232 port, correction and calibration calculations stored on the SD card devices, measurement results displayed on the LCD display. The meter is able to of three different probes measure the performance of up to 8 GHz. Built-in 40 dB attenuator allows measurements up to a frequency of 2.5 GHz with power up to 100 W. A complete functional test tool including three types of probes, measuring unit, and software are the results of this work.
Multichannel RF power meter
Hradňanský, Vladimír ; Povalač, Aleš (referee) ; Šebesta, Jiří (advisor)
In this work is an analysis of methods for measuring high-frequency power, then the design and implementation of multi-channel processor controlled high-frequency power meter. The device enables communication via USB or RS232 port, correction and calibration calculations stored on the SD card devices, measurement results displayed on the LCD display. The meter is able to of three different probes measure the performance of up to 8 GHz. Built-in 40 dB attenuator allows measurements up to a frequency of 2.5 GHz with power up to 100 W. A complete functional test tool including three types of probes, measuring unit, and software are the results of this work.
Hybrid headphone amplifier for the high-end listening and performance
Čacký, Adam ; Šotner, Roman (referee) ; Kratochvíl, Tomáš (advisor)
This bachelor´s thesis describes the design of a high quality small portable headphone amplifier for dynamic headphones. Part of the work is theoretical assumptions for the optimal design and implementation of peripheral involvement, comparing the properties of components used and the resulting parameters of modeled device. Analyses of the electrical quantities of the circuit created in simulation software are enclosed.
Class AB audio amplifier for two satellites and subwoofer
Cupák, Jan ; Brančík, Lubomír (referee) ; Kratochvíl, Tomáš (advisor)
This bachelor’s thesis deals with design of AB class audio amplifiers. Further more it deals also with other functional blocks, e.g. preamplifier, tone equalizer and active crossover. Outcome of this work is a complete solution of the amplifier with it's simulation. In final solution is also included scheme of a high quality power supply unit, speaker protection and heat sinks for high performance transistors. In this project is also included a solution of task about optimal mechanical arrangement of the single parts in the case of this amplifier. This thesis contains results of measurement and photo document of functional prototype.
Eliminator of dental calculus
Halaš, Rostislav ; Čížek, Martin (referee) ; Rozman, Jiří (advisor)
Tato práce se zabývá návrhem ultrazvukového odstraňovače zubního kamene pracujícím na frekvenci 27 kHz s maximální intenzitou ultrazvuku 5W/cm2. Popisuje mechanismus vzniku zubního kamene, důsledky na zdraví a metody jeho odstraňování. Zaměřuje se na principy odstraňování s využitím ultrazvukového vlnění. Dále je sestaveno funkční a blokové schéma. Na základě těchto znalostí je proveden návrh a výpočet jednotlivých částí aplikátoru. Výkonové a napěťové poměry jsou vypočítány od aplikačního hrotu směrem ke generátoru. V neposlední řadě je popsán návrh obvodů buzení měniče i kontrolních obvodů. Schémata jsou doplněna výkresy desek plošných spojů a soupiskou součástek.

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