基于直接数字频率合成(DDS) 原理，利用AT89C52 单片机作为控制器件，采用AD9850

型DDS 器件设计一个信号发生器。给出了信号发生器的硬件设计和软件设计参数，该系统可输出正弦

波、方波，且频带较宽、频率稳定度高，波形良好。该信号发生器具有更强的市场竞争力，在跳频技术、

无线电通信技术方面具有比较广阔的发展前景。-Based on Direct Digital Synthesis (DDS) theory, using AT89C52 microcontroller as a control device, the AD9850 DDS device type to design a signal generator. Gives the signal generator hardware design and software design parameters, the system can output sine wave, square wave, and wide bandwidth, high frequency and stability, wave good. The signal generator has a stronger market competitiveness, in the frequency hopping, radio communication technology has relatively broad prospects for development.