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National Repository of Grey Literature 2 records found  Search took 0.00 seconds. 
Design and Realization of Input and Output Circuits of AD and DA Converters for Audio Signal Processing
 Stejskal, Tomáš ; Koton, Jaroslav (referee) ; Schimmel, Jiří (advisor)
This bachelor's thesis aims at designing the circuit diagram of input and output circuits of analog to digital and, simultaneously, digital to analog convertors intended to process audio signals and their realization. The introductory theoretical part deals with the qualitative requirements concerning the way low-frequency audio amplifiers process audio signal. The following part focuses on the active component base selection with respect to the achievement of the required quality and parameters as defined in the task description. The next part comprises the design of the input and output amplifier circuit diagram itself and then the realization of their functional samples. The input amplifier provides some of the functions which are common with high quality sound production; such as attenuator activation, input signal phase inversion, and MUTE function. This amplifier consists of three logically sequenced parts. A preamplifier with approximately 60 dB amplification and with high separation between a useful signal and noise stands for the first part; a high-pass filter that suppresses interfering signals stands for the second part; and an output amplifier ensuring the balanced output for the analog to digital convertor stands for the last part. The output amplifier, which is connected to the digital to analog convertor, is also embraced of three logically sequenced parts. The first one includes the input amplifier which transforms the input balanced signal to the unbalanced one. The second part is created of an output amplifier that has the line level balanced output.
Detailed record
Design and Realization of Input and Output Circuits of AD and DA Converters for Audio Signal Processing
 Stejskal, Tomáš ; Koton, Jaroslav (referee) ; Schimmel, Jiří (advisor)
This bachelor's thesis aims at designing the circuit diagram of input and output circuits of analog to digital and, simultaneously, digital to analog convertors intended to process audio signals and their realization. The introductory theoretical part deals with the qualitative requirements concerning the way low-frequency audio amplifiers process audio signal. The following part focuses on the active component base selection with respect to the achievement of the required quality and parameters as defined in the task description. The next part comprises the design of the input and output amplifier circuit diagram itself and then the realization of their functional samples. The input amplifier provides some of the functions which are common with high quality sound production; such as attenuator activation, input signal phase inversion, and MUTE function. This amplifier consists of three logically sequenced parts. A preamplifier with approximately 60 dB amplification and with high separation between a useful signal and noise stands for the first part; a high-pass filter that suppresses interfering signals stands for the second part; and an output amplifier ensuring the balanced output for the analog to digital convertor stands for the last part. The output amplifier, which is connected to the digital to analog convertor, is also embraced of three logically sequenced parts. The first one includes the input amplifier which transforms the input balanced signal to the unbalanced one. The second part is created of an output amplifier that has the line level balanced output.
Detailed record

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