Based on analyzing theoutput spectrum of the DDS, some methods to reduce spurs are proposed. They aremodified Nicholas phase accumulator, random dithering and Rom compressingtechniques.

• 在深入研究DDS 输出频谱特性的基础上对DDS杂散抑制方法进行了研究,这些方法包括改进的Nicholas相位累加器、随机扰动技术(包含相位扰动和幅度扰动技术)和ROM 压缩技术。