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National Repository of Grey Literature 2 records found  Search took 0.00 seconds. 
Tube headphone amplifier with USB DAC as an input
 Rozkopal, Tomáš ; Schimmel, Jiří (referee) ; Vlček, Lukáš (advisor)
This thesis focuses on transferring of sound through USB bus. There is analysed a principal of the bus, it´s physical properties and a description of information transmission. Behaviour of the end point is described on an example of an audio device. The second part of the thesis describes demands on digital/analogue converters, their attributes such as resolution, speed of conversion and signal to noise ratio. Furthermore there are described two basic conversions between digital and analogue conversion. The third part of the thesis analyses a principal of tubes and explains a principal of vacuum diode, triode, tetrode and pentode. The individual types of tubes are supplemented by currently produced types and brief descriptions of their use in a circuit. Possible solutions of designing data transfer between a computer and an end point are discussed in the fourth part of the thesis. Different available microcontrollers are compared. The design continues with solving a problem with connecting a DA converter using I2S bus and there is also designed DA converter with voltage output. Demands for analogue filter and numerically derived main assumptions for end amplifier are explained in the final part of the thesis. Tube filter low - pass type is designed and possible solution of an end amplifier is discussed.
Detailed record
Tube headphone amplifier with USB DAC as an input
 Rozkopal, Tomáš ; Schimmel, Jiří (referee) ; Vlček, Lukáš (advisor)
This thesis focuses on transferring of sound through USB bus. There is analysed a principal of the bus, it´s physical properties and a description of information transmission. Behaviour of the end point is described on an example of an audio device. The second part of the thesis describes demands on digital/analogue converters, their attributes such as resolution, speed of conversion and signal to noise ratio. Furthermore there are described two basic conversions between digital and analogue conversion. The third part of the thesis analyses a principal of tubes and explains a principal of vacuum diode, triode, tetrode and pentode. The individual types of tubes are supplemented by currently produced types and brief descriptions of their use in a circuit. Possible solutions of designing data transfer between a computer and an end point are discussed in the fourth part of the thesis. Different available microcontrollers are compared. The design continues with solving a problem with connecting a DA converter using I2S bus and there is also designed DA converter with voltage output. Demands for analogue filter and numerically derived main assumptions for end amplifier are explained in the final part of the thesis. Tube filter low - pass type is designed and possible solution of an end amplifier is discussed.
Detailed record

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