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基于FPGA的多通道信号采集电路设计
资料介绍
针对航天测试中被测模拟信号种类多、数量大的应用背景，设计了一种基于FPGA的多通道数据采集系统。系统采用了模块化的设计，各模块通过内部的三通连接器实现层叠式互联，减小了硬件复杂度并提高了系统的通用性和灵活性。分析采集电路中运放输出异常现象，并给出了解决方案，提高采样精度，并提出了一种多路模拟开关并联运行的采样控制方法，利用FPGA内部的块RAM资源，建立模拟信号通道采样的查找表结构，通过对采样通道地址及模拟开关使能信号进行编码和存储，实现了大量的不同类型的模拟信号的实时采样。
A data acquisition system based on FPGA for the numerous and varied measured analog signal in aerospace test is designed, using the modularizing design, realizing the cascade connection through the internal three-way connector to reduce the architecture complexity and increase the versatility and flexibility of the system. The anomalies of operational amplifier output in the signal acquisition circuit is analyzed and gives a solution to im- prove the sampling accuracy, presents a sampling control method based on the parallel operation of multi-channel analog multiplexers , using FPGA internal block RAM resources to establish a lookup table structure of the sampling of analog signal and achieve a larg...
部分文件列表
| 文件名 | 大小 |
| 基于FPGA的多通道信号采集电路设计.pdf | 319K |
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