VHDL实现谐波检测信号发生的DDS. 同时发出正弦波，三角波，正弦波2倍频后的方波。波形频率相位可调。-VHDL implementation of harmonic detection signal of the DDS. Also issued a sine wave, triangle wave, sine wave, after square-wave frequency 2. Phase adjustable frequency waveform.

资料是本人根据相关文献资料用vhdl语言编写的旋转机械鉴相信号倍频的程序，multifre1.vhd是倍频程序，multifre1.vwf是仿真波形文件，stp1.stp是虚拟逻辑分析仪signaltap文件。该倍频程序可以直接使用，可以设置倍频数，修改实体参数N即可。-According to the literature data is the information I have written in with vhdl Rotating Machinery Kam believe tha