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A Generator Circuit for Sine Signal Based on AT89C51

CAI Zhiduan~(1,2),HU Honghao~2,LI Binglin~2,LI Shihong~2(1.Huzhou University,Huzhou,313000,China;2.Jingdezhen Ceramics Institute,Jingdezhen,333001,China)  
When the square wave signal pass the LPF,we can get the sine signal.But designers don′t 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.
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