直接数字频率合成（DDS）是一种新的频率合成方法，具有频率分辨率高，切换速度快等优点，本文介绍了DDS原理和杂散性能，并从实际应用出发，设计出高性能的多种信号源。

The direct digital frequency synthesis(DDS) is a kind of new frequency synthesis method. It has high frequency resolution, fast frequency switching speed, etc. It introduces the principle and spurious performance of DDS. For practical use, it gives many kinds of signal generator with high performance.

TN957.51 TN742.1