Implementation of a 16-bit Delta-Sigma Analog-to-Digital Converter for Audio Applications

• Main Authors: Yu-Hao Xie, 謝育豪
• Other Authors: Chun-sheng Chen
• Format: Others
• Language: zh-TW
• Published: 2014
• Online Access: http://ndltd.ncl.edu.tw/handle/43921396015756473537

碩士 === 中華科技大學 === 電子工程研究所碩士班 === 102 === This thesis implements a 16-bit delta-sigma analog-to-digital converter for audio applications. This analog-to-digital converter contains a second-order sigma-delta modulator and digital filters. With ability of noise shaping and oversampling, the sigma-delta modulator can shift the in-band quantization errors to out of the band, making a substantial degree of resolution improvement for high-resolution applications such as audio. By using a structure called merged cascade integrator comb (MCIC), the following digital filers can achieve high resolution with smaller hardware area and power. The analog-to-digital converter is designed with TSMC 0.18μm single-poly six-metal process. Layout of each analog blocks and Verilog modules for the MCIC Filters have been shown. Simulation results show that, with an input of a -6dB 1KHz sine, the delta-sigma analog-to-digital converter can achieve an SNR of 87.2dB.