摘要
文章提出了一种基于数字处理芯片DSP和CPLD为基本结构的采用快速傅立叶变换来实现对正弦信号失真度的测量方法。通过DDS芯片AD9851来产生相对于输入信号64倍频的高精度采样信号。由于DSP芯片为FFT算法提供的快速专用指令使得程序在快速性和测量精确性方面有很大提高。
This paper gives a method of based on the DSP and CPLD to work out the distortion of sine wave. Through the DDS CMOS chip AD9851, the system produces a 64 points sampling signal. As the DSP CMOS chip provides many special instructions to FFF, the program has large improvement in speediness and exactness.
出处
《组合机床与自动化加工技术》
2005年第12期75-76,共2页
Modular Machine Tool & Automatic Manufacturing Technique
