摘要：介绍了基于可编程逻辑器件CPLD和直接数字频率合成技术（DDS）的三相多波形函数发生器的基本原理，并在此基础上给出了基于CPLD的各模块设计方法及其VHDL源程序-Abstract : Based on the CPLD and direct digital frequency synthesis (DDS) of a three-phase multi-function waveform Generator to the basic principles and on this basi