DDS波形发生器幅度量化误差的分析及其抑制

Analysis and Restraint of the Phase-accumulator Noise in DDS

讨论了DDS技术的基本组成结构、工作原理和特点。还就DDS技术中的幅度跳变产生的杂散进行了分析,提出一种新的幅度量化杂散信号的抑制方法,此方法通过一个频率恒定的时钟对输出相累加器输出信号进行脉宽调制采样,从而减小相累加器的步进,抑制幅度量化误差。最后给出了实现方法和仿真结果。

In the paper DDS- Tech, including structure build -up, function are discussed. The paper analysisses the noise produced by the phase -accumulator and put up a means by which we can restrain its high output noise.