Research on Sigma-Delta Analog-to-Digital Converter for Precision Measurement

• Main Authors: Yuan-Hung Wang, 王元宏
• Other Authors: Tzuen-Lih Chern
• Format: Others
• Language: zh-TW
• Published: 2007
• Online Access: http://ndltd.ncl.edu.tw/handle/9pujn5

碩士 === 國立中山大學 === 電機工程學系研究所 === 95 === The main purpose of this thesis is to research High-Order Sigma-Delta Analog-to-Digital converter for precision measurement, a PI compensator and a third-order Sigma-Delta modulator has been proposed based on a second-order Sigma-Delta modulator. In accordance with the analysis result of frequency domain and time domain of system, we use third-order model because of better response with auxiliary software to simulate and implement the system, then measure modulator output variance for input variation. This converter circuit demonstrates that it can achieve the requirements of precision and linearity which the measure instrument demands.