基于DDS芯片的信号源设计

Design of Signal Generator Based on DDS Chip

文中介绍一种基于DDS芯片AD9833的信号源,该系统采用FPGA与AD9833相结合的方法,以FPGA为控制核心,以AD9833为直接数字频率合成器,以AD8320为幅度调节器,实现了输出频率、幅值和相位灵活可调的正弦波、三角波和方波信号,实测结果表明该系统输出信号频率误差小、分辨率高。

The This paper introduced a signal generator based on DDS chip AD9833.The system adopted a combination of FPGA and AD9833,with the FPGA being the control center,AD9833 being the direct digital frequency synthesizer and AD8320 being the amplitude modulator.The device can produce sine wave,triangular wave and square wave,which all have the ability of adjusting the frequency,mgnitude and bias.The measurement result shows that the signal generator has little frequency error and high resclution.