一种基于AT89C51的正弦信号产生电路

A Generator Circuit for Sine Signal Based on AT89C51

由方波信号通过滤波电路产生正弦信号的方法,因谐波分量大而常不被设计者所采用。为消除谐波分量,提出了一种谐波分量超前消除的解决方案,并给出了相应的电路和实验数据。实验表明,针对不同的精度要求设计合适的谐波分量超前消除级数能很好地消除谐波分量,使低通滤波器输出的正弦信号精度得到明显提高。

When the square wave signal pass the LPF,we can get the sine signal. But designers donrt want to use the way because of the heavy harmonic components. To eliminate the harmonic components, the article gives a solution. The circuit and the data of the experiment are offered. The experiment data indicates according to the accuracy requirement of the signal, designing the right number of stages of the circuit that eliminate the harmonic components preliminarily can eliminate the harmonic components effectively, so the accuracy of the output signal from the LPF is higher.