摘要
对于直流电源纹波和噪声的测量,不同的测量方法测量的结果往往差别较大。针对这个问题,本文先介绍了电源输出的纹波和噪声的基本概念,并在此基础上介绍了三种常见的纹波和噪声的测量方法:直接测量的方法、去掉探头和探头接地线的测量方法和使用同轴电缆的测量方法。通过分析、比较,阐明了不同测量方法之间的区别,明确了对示波器的要求及测量的注意事项,以使大家能够根据具体情况选用适宜、方便的测量方法,准确地测量到直流电源输出的纹波和噪声。
For measuring ripple and noise of DC power supply, sometimes the result is very different because of different measurement method. For solving this problem, the paper introduces the concept of the ripple and noise of the DC power supply, and also introduces some familiar measurement methods： directly to use the probe, to use the probe without the clip and the ground wire, and to use the coaxial cable. By analyzing and comparing, the difference of the different measurement method is clarified; the requirements to the oscillograph and the notes for measuring are also clarified. It is useful to help us to choose the proper and convenient method for correctly measuring the ripple and noise of DC power supply according to the actual cases.
出处
《电子测试》
2010年第2期88-91,共4页
Electronic Test
关键词
电源
纹波
噪声
示波器
测量
Power supply
Ripple
Noise
Oscillograph
Measurement
