基于FPGA和DDS技术的多通道信号源设计  

A Multichannel Signal Generator Based on DDS and FPGA

作　　者：杨建华[1] 

机构地区：[1]西安工业大学电子信息工程学院,西安710032

出　　处：《计算机与数字工程》2017年第8期1656-1659,1664,共5页Computer & Digital Engineering

基　　金：国家自然科学基金:深海空间站回转型穿梭器网络化控制性能分析与优化(编号:61473224);陕西省教育厅专项科研计划项目(编号:16JK1372)资助

摘　　要：了解决普通信号源频率分辨率低、频率准确度低、开发更新周期长、信号通道少的问题,文中设计并实现了一种以FPGA、高速D/A和低通滤波为核心,基于DDS技术的多功能多通道信号源。在FPGA中设计了PCI接口控制器、同步时钟控制模块、SRAM控制器、DDS模块等。系统测试结果表明该系统硬件电路简单可靠,能够产生幅度和频率可调的正弦波、方波、三角波、锯齿波和任意波形信号,频率分辨率可达0.01Hz,频率准确度小于等于±0.1%。In order to solve the problem of the low frequency resolution,low frequency accuracy,the long cycle of develop-ment and update and the less signal channel,a multi-function and multi-channel signal generator which is based on DDS technolo-gy with FPGA,high-speed D/A and a low-pass filter as the core is designed and implemented. In the FPGA,the PCI interface con-troller,synchronous clock control module,SRAM controller and DDS module etc are designed. The experiment results show that the system is simple and reliable and can generate sine wave,square wave,triangular wave,saw tooth wave and arbitrary waveform sig-nal. The frequency resolution comes up to 0.01Hz and frequency accuracy is equal or lesser than ±0.1％.

关 键 词：直接数字频率合成(DDS) FPGA 信号源 相位累加器 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]