基于高速高精度D/A的红外信号模拟器实现

针对红外信号模拟器精度高、数据量大以及数据速率高的要求,采用FPGA、SDRAM和高速高精度D/A的实现方案。在研制过程中解决了D/A的抗噪声、高精度、数模高速转换等关键技术。实验结果表明,该模拟器可以达到0．8mV的模拟信号输出精度、20MHz的数据打入速率以及4MHz的多路模拟信号转换速率。该模拟器现已交付使用并达到了系统需求。

Infrared Signal Simulator Based on High Speed and High Accuracy D/A

In order to meet the requirement of the high accuracy,a large number of data and high slew-rate in an infrared signal simulator,the methods of FPGA,SDRAM and D/A with high speed and high accuracy are adopted in this paper.The key techniques of D/A restraining the noise,high accuracy and high speed slewing rate are resolved.The test result indicates that this infrared signal simulator meets the requirement of 0.8mV accuracy of analog signal output.Now this simulator has been on working and meet the system requirement.