摘要
分析了开关电源纹波和噪声的组成成分及哪些成分需要抑制。通过铁氧体磁珠抑制基频纹波和高频噪声的等效电路,得出结论为当降压型变换器与其他电路拥有共同的输入电压时,降压型变换器的输入噪声完全可以干扰其他装置;简单滤波方式可以用来降低输入噪声,改善电路的特性。最后给出了计算公式及结果。
The switching power supply ripple and noise components, and those noise components which requires filtering were analyzed. A conclusion was drawn from the equivalent simulation circuit of rejecting the switching frequency ripple and high frequency noise with ferrite bead when buck converter and other circuit supplied with the same voltage, the input noise of the buck converter disturted other devices entirely. Simple filtering patterns can be used to decrease input noise and improve circuit characteristics. Finally, the corresponding formula and the results were presented.
出处
《辽宁工业大学学报（自然科学版）》
2008年第5期302-304,共3页
Journal of Liaoning University of Technology(Natural Science Edition)
