A Study on the Modeling and Design of Sigma-Delta Modulator for High Precision ADC  

作　　者：Haodong Guo Longyu Li Xia Zhang 

机构地区：[1]Shandong Provincial Key Laboratory of Optical Communications Science and Technology,School of Physics Science and Information Engineering,Liaocheng University,Liaocheng 252000,Shandong,China

出　　处：《Journal of Electronic Research and Application》2025年第2期240-246,共7页电子研究与应用

摘　　要：With the continuous improvement of signal processing accuracy requirements in modern electronic systems,the demand for high-precision analog-to-digital converters(ADCs)is increasing.Sigma-Delta modulator,as the most important component of high-precision ADC,is widely used in high-quality audio,high-precision instrument measurement,and other fields due to its advantages of high precision,strong noise resistance,and low hardware cost.This article designs a discrete structure third-order four-bit high-precision Sigma-Delta modulator through modeling,with an oversampling rate set to 512.Under ideal conditions,the simulation results show that the SDNR reaches 152.7db and the ENOB is 25.24bits.After introducing non-ideal noise,the system performance has decreased.The simulation results show that the SDNR is as high as 124.5db and the ENOB is 20.39bits.This indicates that the design can achieve high-precision conversion and provide assistance for further research in the future.

关 键 词：Analog-to-digital converter Sigma-Delta modulator High precision Modeling design 

分 类 号：TN911.7[电子电信—通信与信息系统]