基于FPGA和USB接口的多路并行信号源

Multiple Parallel Signal Sources Based on FPGA and USB

针对传统多路并行信号源存在输出信号类型有限的问题,设计了一种基于FPGA和USB接口的多路并行信号源。该多路并行信号源通过控制单元按顺序将波形幅度量化值写入信号发生器的双口RAM,各信号发生器利用全数字化频率合成技术(DDS)产生对应的信号,利用LabVIEW编写了上位机程序。仿真和实验结果表明,该多路并行信号源可产生任意信号,信号源输出波形类型、频率和幅值均可通过上位机实时修改,且操作简单、灵活。

Considering the limited output signal types of traditional multiple parallel signal sources,the multiple parallel signal source based on FPGA and USB was designed.Through the controller,the multiple parallel signal source can write waveform amplitude quantized value into the DPRAM sequentially,and each signal generator generates the corresponding signal based on direct digital synthesizer（DDS）.Through LabVIEW,the PC program can be written.Both simulation and experimental results show that the multiple parallel signal sources can generate any signal;and the output waveform type,frequency and amplitude of signal can be real-time amended through PC simply and flexibly.