基于DDS芯片的相位相关双通道信号源设计  

Design of double channel signal source with related phase based on DDS chip

作　　者：刘春梅[1] 邹传云[1] 曹文[1] 胥磊[1] 

机构地区：[1]西南科技大学信息工程学院,四川绵阳621010

出　　处：《电子技术应用》2013年第1期43-46,共4页Application of Electronic Technique

基　　金：国家自然科学基金资助项目(61075030)

摘　　要：采用直接数字频率合成（DDS）芯片AD9854设计了一种任意相位相关双通道信号源，利用FPGA可编程器件实现逻辑控制。该信号源可输出两路相干、同频、相位差可设定的正弦信号。同时，利用DDS器件内置的高速比较器及外围信号调理电路，也可同时输出三角波和方波信号。其输出频率范围为0～150MHz，频率分辨率为1μHz，相位调节分辨率可达0．022°。实测结果表明，该系统输出信号频率稳定度高、相位差精确。This paper presents a design of an any-phase-related double channels signal source based on DDS chip AD9854 and adopts programmable device FPGA to realize logic control. The signal source can output double sine signals with the same fre- quency and the adjustable phase difference. At the same time, it also outputs square wave and triangular wave by using a high- speed comparator of DDS devices and peripheral regulating circuit. The output frequency range is 0-150 MHz, the frequency resolu- tion is 1 μHz, and the phase adjustment resolution is 0.022°. The measurement result shows that the signal source has high fre- quency stability and precise phase difference.

关 键 词：FPGA AD9854 直接数字频率合成 相干信号源 

分 类 号：TP216[自动化与计算机技术—检测技术与自动化装置]