基于幅值等分的数字化正弦信号生成的设计

摘要

Digital sine wave generator is proposed in this paper.In the method the amplitude equipartition is used and the equipartition is matched by conversion accuracy based on the required precision of the sine wave At first,the basic theory of the method and scheme with FPGA are analyzed.Then,the quantization error analysis is given.At last,the SPWM generated from sine wave with this method modulating the triangle carrier wave.The results of this method after DAC test are presented.%提出了一种基于正弦波幅值等分的数字化正弦调制信号的设计方法。该方法基于正弦调制信号的精度问题,通过采用将正弦波等分成与转换精度匹配的份数,得出数字化正弦信号。阐述了这种方法的基本原理及其FPGA模块原理图,并对其进行了误差分析。最后,给出了利用此方法产生正弦调制信号后通过DAC后波形,验证了方法的可行性。