基于FPGA的可调节信号发生器的设计与实现  

Design and implementation of an adjustable signal generator based on FPGA

作　　者：张晋顼 任勇峰[1] 单彦虎[1] 刘艳莉[1] 武慧军[1] ZHANG Jin xu;REN Yong feng;SHAN Yan hu;LIU Yan li;WU Hui jun(National Key Laboratory for Electronic Measurement Technology,North University of China,Taiyuan 030051,China;North University of China,Taiyuan 030051,China)

机构地区：[1]中北大学电子测试技术国家重点实验室

出　　处：《电子设计工程》2019年第22期137-141,共5页Electronic Design Engineering

摘　　要：依据航天测试领域对于信号发生器精度高、可靠性强以及易于操作的要求,提出了一种基于FPGA的可调节信号发生器设计方法。此设计选用可编程逻辑器件FPGA作为主控制芯片,通过上位机发送指令给FPGA从而实现信号频率、幅值、通道数的切换。此设计采用FPGA控制多路选通开关(ADG1206),在运放跟随电路的保持时间内把模拟信号波形切换到对应通道,达到方波波形的32通道输出,方波的边沿时间小于1μs;采用DDS芯片(AD9106)实现输出波形种类多、精度高、可控制的4通道并行信号输出。According to the field of aerospace testing,the signal generator has high precision,high reliability and easy operation;I propose an FPGA-based design method for adjustable signal generator.The method uses FPGA as the main control chip,and controls the FPGA to realize the switching of signal frequency,amplitude and channel number by means of the upper computer. This design uses electronic switch control and op amp circuit to keep following the analog signal of each channel to the corresponding channel position,and realize the 8-channel output of the square wave signal. Its square wave edge time ≤ 1μs. This design uses DDS chip(AD9106)to realize 4-channel parallel signal output with many types of output waveforms,high precision and controllability.

关 键 词：信号发生器 DAC DDS 方波 任意波形 模拟开关 多通道 

分 类 号：TH7[机械工程—仪器科学与技术]