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Design of sigma-delta digital-to-analog converter in CMOS technology
Soukup, Luděk ; Pristach, Marián (referee) ; Fujcik, Lukáš (advisor)
This master’s thesis deals with the issue of digital to analog conversion and possibility of its realization in digital circuits. Goal of this project is to design sigma-delta digital to analog converter with resolution of 14 bits and frequency band (0 ÷ 20) kHz. Main functional blocks: interpolator and modulator sigma-delta will be realized like digital structures. Reconstruction filter will be realized like an analog structure. For design a check of parameters of designed converter programs MATLAB and Simulink are used. Designed digital structures will be described by VHDL language.
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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.
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Programmable load
Koleček, Jan ; Fujcik, Lukáš (referee) ; Pavlík, Michal (advisor)
The diploma thesis deals with the design of a programmable load. As first, the research of available commercial devices was made in the theoretical part. Based on this research, the design possibilities of programmable load were discussed. As next, the design of resistor network was made, using a computer program that was developed for this purpose. Practical part deals with a realization of module of load, control board and software development. Proposed system consists of control board and ten modules. Modules have floating input terminals. This approach facilitate to arbitrary combination of their inputs. Modules are designed to work with DC and AC power supplies.
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Programmable load
Koleček, Jan ; Fujcik, Lukáš (referee) ; Pavlík, Michal (advisor)
The diploma thesis deals with the design of a programmable load. As first, the research of available commercial devices was made in the theoretical part. Based on this research, the design possibilities of programmable load were discussed. As next, the design of resistor network was made, using a computer program that was developed for this purpose. Practical part deals with a realization of module of load, control board and software development. Proposed system consists of control board and ten modules. Modules have floating input terminals. This approach facilitate to arbitrary combination of their inputs. Modules are designed to work with DC and AC power supplies.
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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.
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Design of sigma-delta digital-to-analog converter in CMOS technology
Soukup, Luděk ; Pristach, Marián (referee) ; Fujcik, Lukáš (advisor)
This master’s thesis deals with the issue of digital to analog conversion and possibility of its realization in digital circuits. Goal of this project is to design sigma-delta digital to analog converter with resolution of 14 bits and frequency band (0 ÷ 20) kHz. Main functional blocks: interpolator and modulator sigma-delta will be realized like digital structures. Reconstruction filter will be realized like an analog structure. For design a check of parameters of designed converter programs MATLAB and Simulink are used. Designed digital structures will be described by VHDL language.
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