【摘要】 介绍了采用DDS芯片构成高性能波形发生器的方法及硬件、软件结构 ,并介绍了利用数字电路配合RAM ,DDS芯片及DAC生成各种波形数据的原理及方法。该仪器利用DAC将数字量转化为模拟量来生成各种波形 ,可以用它代替常用的模拟信号发生器。由于采用了DDS ,使得信号频率范围覆盖超低频和高频 ,同时极大地提高了频率的分辨率和准确度更多还原

【Abstract】 This paper presents the principle of designing a high quality waveform generator with DDS, as well as its hardware and software structure. The method using RAM, DDS chip, D/A converter together with digital circuits to produce various waveforms was also described detailedly in the article, which acturally utilized D/A converter to transfer digital signal into analog signal so as to form analog waveforms. The signal obtained by this means proved to be having high frequency resolution and accuracy in a wide range and thus can be suitable to replace that generated by analog generators.更多还原