基于PXI的高速数字化仪模块  

High-speed digitizer module based on PXI bus

作　　者：何鹏[1] 

机构地区：[1]中国电子科技集团公司第四十一研究所,山东青岛266555

出　　处：《电子设计工程》2010年第7期132-134,138,共4页Electronic Design Engineering

摘　　要：设计了一种基于PXI接口、双通道12位、采样速率250 Msps的高速数字化仪模块,给出该系统的工作原理、设计思想和实现方案,系统采用双通道A/D转换器进行采样,使用高性能FPGA器件进行通道控制、数据处理和接口设计,具有功能强大的前端调理电路,可以选择匹配阻抗和耦合方式、具有增益自动调整功能,满足大范围信号的测量要求。从硬件和软件两个方面对高速数据采集、传输和存储的关键问题进行了深入探讨。该数字化仪模块可方便的与其他PXI仪器组成测试系统,实现对信号的高速采样和长时间记录。This article introduces a high-speed digitizer module based on PXI bus, which has two 12 bit separate channels with the sampling rate of 250Msps, and discussed the principle and implementation methods. The system adopts A/D binary channel to sample and high-performance FPGA to achieve channel controlling, data processing and interface design. It owns the high-power regulation circuit which can choose matched impedance and coupled modes. And it can adjust gain automatically which can satisfied the testing requirement of wide range singal. This article mainly discusses the high speed data acquiring, transmitting and saving from the hardware and software. This digitizer can be built to test system with other PXI instruments, and widely used on the occasion which needs high speed data sampling and processing.

关 键 词：PXI总线 数字化仪 LVDS FPGA MAX1215 

分 类 号：TP216[自动化与计算机技术—检测技术与自动化装置]