基于AD9910的调频信号发生器设计

The design of FM signal generator based on AD9910

针对产生功率可调的调频信号的需求,本文设计了一款基于DDS芯片AD9910的调频信号发生器。该系统以C8051F040为控制核心,以PA2460为功率放大器,以PE4302为幅度调节器,并通过键盘设定输出信号的频率,产生输出波形,功率均可调节的调频信号。本文给出硬件电路与软件设计流程。实验结果表明,该信号发生器性能稳定,输出信号频率误差小,实现了设计的功能需要。

Aiming at the requirement of generating FM signal that its power can be modulated,the paper designed a FM signal generator based on DDS chip AD9910.The system can generate FM signal which waveform and power can be modulated using C8051F040 as the core,using PA2460 as the PA,using PE4302 as the amplitude modulator and using keyboard to set the frequency of the output signal.The paper gives the hardware circuit and software design process of the system.The measurement result shows that the system runs stably and output signal has little frequency error.The system realizes the requirement of the desire.