Publication: Rekabentuk bagi delta-sigma dac untuk aplikasi 8-bit adc dengan menggunakan teknologi fpga
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Date
2007-03-01
Authors
Ong, Keng Leong
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Abstract
The delta-sigma conversion technique has been in existence since many years, but onlyrecently the enormous progress in the integration of complex functions on silicon hasmade it extremely appealing. The main applications are found in the consumer andindustrial domain: audio applications, process control, transducers, motor controlindustrial instrumentation etc. In this thesis, the Delta-Sigma Converter has beendesigned to perform the specifications of the Digital-to-Analog Converter application. The DAC output is used to generate a reference voltage in the ADC application. TheSuccessive-Approximation ADC algorithm is used to perform the ADC application. Thehardware implementation has been done in Schematic Capture to realize it in FPGA. Thehardware simulation is introduced and its performance is verified by investigated thestructural timing simulation which available in the XILINX FOUNDATION 2.1i ToolsThe CLB used in the Delta-Sigma DAC Converter is only 1% of total CLB space. Theresult of simulation shows that the Delta-Sigma Converter achieved at the maximumfrequency up to 118.231 MHz for 8-bit digital input. This Delta-Sigma Converter will bedownloaded into a XILINX XC4010XLPC48 FPGA chip with an analog comparator, afew resistor and capacitor to achieve ADC application. However, for the 8-bit ADCapplication using the Delta-Sigma DAC Converter, it required 10% CLB space and thehighest frequency can be achieved is 85.056 MHz