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Low frequency preamplifier with audio input selector
Tlamka, Vladimír ; Levek, Vladimír (referee) ; Šteffan, Pavel (advisor)
This bachelor thesis is about the design and construction of a low-frequency stereo preamplifier with a digitally controlled switch of eight stereo inputs with different input sensitivities. In this task is the most important the quality of listening due to low crosstalk between channels, high signal-to-noise ratio and low distortion. The design includes a preamplifier with RIAA frequency correction for the possibility of direct connection of phono cartridge
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Design of low noise Band Gap reference in BCD process
Kadaňka, Petr ; Prokop, Roman (referee) ; Kadaňka, Petr (advisor)
This diploma thesis focuses on noise analysis of different integrated circuits used for generating temperature stable reference voltage. All noise contributions are studied separately and there is shown a way of their minimization. Circuit using external capacitor with pre-charging system is chosen as the best solution. Output noise of all analyzed circuits is compared and characteristics of final band-gap reference are summarized at the end of the work.
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Universal audio interface for autonomous use
Trojak, Ondřej ; Šťáva, Martin (referee) ; Levek, Vladimír (advisor)
This text analyses the current situation within the audio signal work field and the appropriate ways of connecting electronic networks for processing blocks. The thesis deals with circuit design, firmware programming and physical realization of a subsequently measured autonomous battery-powered interface which provides volume control of input signals and conversion of different types of connectors and signal lines, consuming low power and adding low noise. The device is also equipped with a phantom power supply for condenser microphones. The control consists of a set of buttons, a rotary encoder and a display unit.
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Low frequency preamplifier with audio input selector
Tlamka, Vladimír ; Levek, Vladimír (referee) ; Šteffan, Pavel (advisor)
This bachelor thesis is about the design and construction of a low-frequency stereo preamplifier with a digitally controlled switch of eight stereo inputs with different input sensitivities. In this task is the most important the quality of listening due to low crosstalk between channels, high signal-to-noise ratio and low distortion. The design includes a preamplifier with RIAA frequency correction for the possibility of direct connection of phono cartridge
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Design of low noise Band Gap reference in BCD process
Kadaňka, Petr ; Prokop, Roman (referee) ; Kadaňka, Petr (advisor)
This diploma thesis focuses on noise analysis of different integrated circuits used for generating temperature stable reference voltage. All noise contributions are studied separately and there is shown a way of their minimization. Circuit using external capacitor with pre-charging system is chosen as the best solution. Output noise of all analyzed circuits is compared and characteristics of final band-gap reference are summarized at the end of the work.
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