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Design of class-D audio power amplifier
Fiala, Roman ; Götthans, Tomáš (referee) ; Brančík, Lubomír (advisor)
This semestral thesis describes class D low frequency power amplifiers and design of specific 2x100W class D power amplifier. The designed amplifier contains a second order sigma-delta modulator in which the quantization is controlled only by the delay of modulator components. This design does not include the clock generator which usually controls the quantization in sigma-delta modulators. This semestral thesis also includes design of a switched-mode power supply for the power amplifier and for the preamplifier. The PSpice program has been used for the design and verification of some sections of circuits. All designs have been built. Also basic parameters of completed circuits were measured.
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Design of output digital part for band-pass sigma-delta modulator
Hort, Marek ; Háze, Jiří (referee) ; Fujcik, Lukáš (advisor)
This work deals with questions connected with design of output digital part of sigma-delta conversion unit - band-pass filter type. It was created model of sigma-delta modulator and model of output digital part of conversion unit via MATLAB SIMULINK. Created design was define by VHDL programming language and was implemented to FPGA. Sigma-delta modulator band-pass filter type is part of BANDPASS MODULATOR chip which was designed at Department of microelectronics, University of technology Brno, and witch is designed for measuring of capacity of pressure sensors. There were made PCB for testing of behaviour of output digital part and BPM.
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NEW PRINCIPLES OF GATE CAPACITANCE CHARACTERIZATION FOR SIGMA-DELTA MODULATORS
Sutorý, Tomáš ; Ďuračková, Daniela (referee) ; Husák, Miroslav (referee) ; Kolka, Zdeněk (advisor)
This thesis deals with the utilization of new principles of characterization of gate capacitances for sigma-delta modulators. Sigma-delta modulators are the integral part of sigma-delta analog-to-digital converters. The proposed new method is characterized by high resolution and modest requirements for laboratory equipment. It allows characterizing capacitances whose values are within the range which is used in sigma-delta modulators. The thesis contains description of the new method, the analysis of measurement accuracy and experimental results.
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Design of class-D audio power amplifier
Fiala, Roman ; Götthans, Tomáš (referee) ; Brančík, Lubomír (advisor)
This semestral thesis describes class D low frequency power amplifiers and design of specific 2x100W class D power amplifier. The designed amplifier contains a second order sigma-delta modulator in which the quantization is controlled only by the delay of modulator components. This design does not include the clock generator which usually controls the quantization in sigma-delta modulators. This semestral thesis also includes design of a switched-mode power supply for the power amplifier and for the preamplifier. The PSpice program has been used for the design and verification of some sections of circuits. All designs have been built. Also basic parameters of completed circuits were measured.
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NEW PRINCIPLES OF GATE CAPACITANCE CHARACTERIZATION FOR SIGMA-DELTA MODULATORS
Sutorý, Tomáš ; Ďuračková, Daniela (referee) ; Husák, Miroslav (referee) ; Kolka, Zdeněk (advisor)
This thesis deals with the utilization of new principles of characterization of gate capacitances for sigma-delta modulators. Sigma-delta modulators are the integral part of sigma-delta analog-to-digital converters. The proposed new method is characterized by high resolution and modest requirements for laboratory equipment. It allows characterizing capacitances whose values are within the range which is used in sigma-delta modulators. The thesis contains description of the new method, the analysis of measurement accuracy and experimental results.
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Design of output digital part for band-pass sigma-delta modulator
Hort, Marek ; Háze, Jiří (referee) ; Fujcik, Lukáš (advisor)
This work deals with questions connected with design of output digital part of sigma-delta conversion unit - band-pass filter type. It was created model of sigma-delta modulator and model of output digital part of conversion unit via MATLAB SIMULINK. Created design was define by VHDL programming language and was implemented to FPGA. Sigma-delta modulator band-pass filter type is part of BANDPASS MODULATOR chip which was designed at Department of microelectronics, University of technology Brno, and witch is designed for measuring of capacity of pressure sensors. There were made PCB for testing of behaviour of output digital part and BPM.
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