基于ADS6122和FPGA的多通道信号采集系统的设计  

Design of Multichannel Data Acquisition System Based on ADS6122 and FPGA

作　　者：陈珏利[1] 曾成志[2] 郑海荣[2] 伏全海[1] 王娇娜[1] 徐礼胜[1,3] 

机构地区：[1]东北大学中荷生物医学与信息工程学院.沈阳100819 [2]中科院深圳先进技术研究院,广东深圳518055 [3]教育部医学影像重点实验室,沈阳110819

出　　处：《电子器件》2012年第4期406-411,共6页Chinese Journal of Electron Devices

基　　金：辽宁省自然科学基金项目(201102067);教育部博士点基金项目(20110042120037);东北大学基本科研业务费探索导向重点项目(N110219001)

摘　　要：针对超声成像系统的信号采集要求,介绍了一种基于FPGA的多通道数据采集和传输系统的设计与实现。采用ADS6122,实现了12 bit、单通道最高采样频率达65 MHz的A/D转换电路。该系统采用FPGA进行逻辑控制,实现了高频信号单通道采集,低频信号多通道同时采集的数据采集系统。系统测试结果表明:当单通道模拟信号输入频率不超过7 MHz时,得到的采样速度和采样精度都能满足超声信号采集的高要求。该系统还可以作为相关多通道信号采集系统设计的参考。A design of multichannel data acquisition system for ultrasonic imaging based on FPGA is implemented. A circuit with ADS6122 A/D converter is implemented, in which the highest sampling frequency can be 65MSPS. FPGA is used to control the logic, a data acquisition system for sampling one channel higher frequency signal and for sampling multi-channel lower frequency signals is implemented. The test results show that the sampling rate and sampling precision can meet the high requirements of the ultrasonic signal acquisition when the channel analog signal input frequency is less than 7 MHz. This system can also be referred to design other related multi-channel ac- quisition system.

关 键 词：超声信号采集 FPGA 多通道数据采集 ADS6122 USB2.0 高速A/D转换 

分 类 号：TN911.72[电子电信—通信与信息系统]