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直接数字合成(DDS)是近年发展非常迅速的一种新型合成技术,有频率分辨率高,转换时间短等特点,与锁相合成技术(PLL)配合,可以设计出频带宽、分辨率高的频率合成器.介绍了DDS的基本原理及DDS+PLL的基本实现方法,设计了一种特高频率、宽频带、小步进的频率合成器.
Direct digital synthesis (DDS) is a new type of synthesis technology developed very rapidly in recent years. It has the characteristics of high frequency resolution and short conversion time. It can be designed with phase-locked loop (PLL) technology to design a wide bandwidth and high resolution Frequency synthesizer.It introduces the basic principle of DDS and the basic realization of DDS + PLL and designs a frequency synthesizer with high frequency, wide band and small step.