基于DDS的低频信号发生器的设计  

Design of DDS-Based Low-Frequency Signal Generator

作　　者：张萍[1] 

机构地区：[1]江阴职业技术学院电子信息工程系,江苏江阴214405

出　　处：《自动化技术与应用》2016年第6期106-109,共4页Techniques of Automation and Applications

摘　　要：针对常用信号发生器精度不高、控制功能实现不便等不足,设计了一款低频信号发生器。系统以低功耗DDS芯片AD9833为直接数字频率合成器,以可编程放大器AD8320为幅度调节器,设计并实现了一个频率和幅值可调的低频信号发生器,该信号发生器控制功能实现方便,能输出正弦波、三角波和方波三种波形。实测结果表明:该系统输出信号精度高、稳定度高、功耗低、波形光滑。Aiming at the accuracy is not high and inconvenient to implement control functions for a common signal generator, a lowfrequency signal generator is designed. With AD9833 as the direct digital frequency synthesizer and the programmable amplifier AD83202 as the magnitude regulator, a low-frequencyr signal generator of the adjustable frequency and amplitude is designed and implemented. It is convenient to implement control functions of the signal generator. The signal generator can output sine, triangle and square wave. Test results show that the system can output signals with high precision, stability and low power, and the output signal waveforms are smooth as well.

关 键 词：低功耗 AD9833 DDS模块 AD8320 

分 类 号：TM391.9[电气工程—电机]