太赫兹科学与电子信息学报2017，Vol.15Issue(3)：500-506,7.DOI:10.11805/TKYDA201703.0500
基于积分过采样结构的高精确度模数转换器
High-accuracy Analog to Digital Convertor based on an integral over-sampling structure
摘要
Abstract
This paper designs a high-accuracy Analog to Digital Converter(ADC) based on an integral over-sampling structure. This structure of the converter bears high linearity,kilohertz magnitude of signal bandwidth. It shows higher accuracy performance and higher sampling rate compared with the general integration ADC. This ADC is mainly composed of sampling and holding module,voltage and current conversion module,integral module,integration Analog to Digital(AD) module,FieldProgrammable Gate Array(FPGA) module,reference source and power module. Integral transform processing and over-sampling techniques are utilized to improve the accuracy and sampling rate of the converter. In order to verify the correctness and feasibility of the integral over-sampling theory, an 18bit integral over-sampling ADC is designed and implemented, which has a bipolar input voltage from -2V to +2 V and a sampling rate of 10 kHz. By theoretical calculation and simulations of the ADC, the results show that the effective number is 17 bit,the Signal-to-Noise Ratio is 104.06 dB,the Differential Linearity Error(DLE) is below 0.5 LSB and the Integral Linearity Error(ILE) is below 0.3 LSB.关键词
积分/过采样/高精确度/模数转换器Key words
integral/over-sampling/high-accuracy/Analog to Digital Convertor分类
信息技术与安全科学引用本文复制引用
鲍飞鸿,张超,汪帆,鲍蕾蕾,鲍景富..基于积分过采样结构的高精确度模数转换器[J].太赫兹科学与电子信息学报,2017,15(3):500-506,7.基金项目
国家自然科学基金委员会和中国工程物理研究院联合基金资助项目(U1430102) （U1430102）
