摘要
文章列举了造成DDS输出杂散的主要来源,针对累加器相位截断造成的DDS输出信号误差进行分析,并应用适当的随机序列累加到DDS的相位序列中,从而将周期性误差序列造成的幅度较大的杂散变成均匀分布的宽带噪声,在一定程度上改善了DDS的输出频谱。
Main sources of DDS output spurs are presented in this paper. For the truncation of accumulator phase word output, DDS output error is analyzed. Appropriate random sequence is added to the truncated phase sequence. As a result,some large discrete spurs caused by periodic error sequence is converted to average noise. To a certain extent, DDS output spectrum is improved.
出处
《电子与封装》
2007年第7期21-23,共3页
Electronics & Packaging
