Designing and Evaluating a Delta-Sigma DAC for Hi-Fi Audio : To be used in an FPGA implementation

Abstract: This thesis describes the design of a digital-to-analog converter using a DeltaSigma modulator. The converter’s purpose is to be used for Hi-Fi audio. The thesis is limited to the digital domain of the converter, which is the digital interpolation filter and digital Delta-Sigma modulator. A design for implementing the digital filter and modulator is presented together with the cost of the implementation. The process for evaluating the performance is described. The design presented is satisfactory to be used for Hi-Fi audio, achieving the SNR performance of 146 dB, and an implementation of the design seems feasible on an FPGA.