提高ADC精度方法  

Method to Improve Precision of ADC

作　　者：韩超[1] 周胜利[1] 陈小彦[1] 李宝华[1] HAN Chao ZHOU Shengli CHEN Xiaoyan LI Baohua(College of Electronic Science and Engineering, Jilin University, Changchun 130012, China)

机构地区：[1]吉林大学电子科学与工程学院,长春130012

出　　处：《吉林大学学报（信息科学版）》2016年第3期396-400,共5页Journal of Jilin University（Information Science Edition）

基　　金：吉林省科技发展基金资助项目(20070331)

摘　　要：为满足低成本实现高速、高精度模数转换器(ADC:Analog-to-Digital Converter)的要求,提出了一种以低位数ADC实现高位数ADC的方法。该方法采用单片机比较器作为1位ADC,在被测信号上叠加一个扰动信号,经过多次模数转换并累加,达到多位高精度ADC的效果。实验结果验证了该设计电路的合理性和正确性,实现了低成本ADC在高精度测量中的应用。In order to meet the low-cost high-speed, high-accuracy ADC （Analog-to-Digital Converter ）requirements, this paper presents a low number to the number of ADC to achieve a high level approach. Themethod uses a single chip as a comparator ADC, the signal is superimposed on a disturbance signal, after severalanalog to digital conversion and accumulating a number of high-precision ADC to achieve results. Experimentalresults show that the designed circuit is reasonable and correct, to achieve a low cost ADC in high precisionmeasurement.

关 键 词：模数转换器 精度 扰动信号 

分 类 号：TP274[自动化与计算机技术—检测技术与自动化装置]