基于AT89C51的正弦信号产生方法的改进

A Generator Circuit for Sina Signal Based on AT89C51

由于方波信号通过滤波电路产生正弦信号过程中，正弦信号中将会存在较大的谐波分量．基于AT89C51提出一种谐波超前消除的解决方案，能很好地消除谐波分量，使低通滤波器输出高精度的正弦信号．

When the square wave signal pass the LPF, it can get the sina signal. But there are many harmonics components in the signal of sina. The paper presents a solution that eliminates the harmonics component preliminarily for the question and we will get the accuracy of the output signal of the LPF.