摘要
介绍了多通道模拟信号发生器,利用FPGA并行工作的特点结合DDS直接数字频率合成技术,实现80路模拟信号并行输出,同时设计了转接扩展卡,最大可扩展至512路输出。采用AD9744高速D/A转换芯片,输出信号频率范围0～100 kHz,可输出正弦波、方波、直流量等波形,频率分辨力0.01 Hz,输出精度千分之一。
A multi-channel analog signal generator is introduced ,which makes use of the parallel characteristics of FPGA with DDS technic to achieve 80 roads of parallel analog signal output. Meanwhile a transfer expansion card is designed which making maximum number of outputs can be expanded to 512 roads. AID744 high-speed D/A converter is adopted to generate sine wave, square wave and direct current component whose frequency range is 0 - 100 kHz,frequency resolution is 0. 01 Hz,and the output precision reach to 0. 1 percent.
出处
《电视技术》
北大核心
2012年第17期173-174,177,共3页
Video Engineering
基金
国家自然科学基金重点项目(51075375)
