无线电工程

介绍了高性能DDS器件AD9958的主要特点和内部结构,简单描述了AD9958用作直接频率合成器时输出单频信号的控制方法。给出了利用89C51系列单片机和AD9858组成的双通道直接频率合成器的设计框图。结果表明以AD9958作为核心部件设计的双通道直接频率合成器可以对通道间的不均衡进行校正,也能够对多片AD9958实现同步。

The main feature and internal structure of AD9958 - namely the high performance DDS chip is introduced and the control method of output single-tone mode by using AD9958 as direct frequency synthesizer is described. And the hardware functional block diagram of the double channels DDS source by using AD9858 and chip monolithic computer 89C51is provided. The result shows that AD9958 can be used to correct imbalances between signals and perform synchronization of multiple devices.