幾種正弦波基準電壓信號產生方法的比較

摘要：本文首先介紹了幾種正弦波基準電壓信號的產生方法，然后對每種方法進行了實驗，并給出了實驗波形，最后根據實驗結果，對每種方法進行了分析和比較。階梯波合成法電路結構簡單，但不易調節相位；DAC采樣法外圍電路結構簡單，且易于調節相位；SPWM濾波法由軟件控制，可調性好。 敘詞：正弦波 相位 總諧波失真 基準電壓 Abstract：This paper analyzed some methods generating sinusoidal waveform reference voltage signal. On the basis of theoretical analysis, the experiment was done. The advantages and disadvantages of each method were given. The circuit structure of step wave generation method was simple but the phase could not be adjusted; The DAC generation method had less circuit, and the phase could be adjusted by program easily; SPWM generation method was controlled by software, it was adjustable. Keyword：Sinusoidal waveform, Phase, Total harmonic distortion, Reference voltage