题目

英语翻译
串联单点接地
元件电路及信号连线在1 MHz 以下时,单点接地是最好
的方式.在较高的频率,连线trace 的电感会增加PCB
阻抗.在更高的频率,power 平面及trace 的阻抗变得
不可忽略.如trace 长度等於或接近信号的四分之一波
长之奇次倍,阻抗会很高,trace 或是 ground导入就
会像是天线般辐射RF能量.在1 MHz 以上频率,一般不
使用单点接地

提问时间：2021-03-30

答案

Series single point grounding
When element circuit and signal line is below 1MHz, single point grounding is the best choice. On the condition of relative high frequency, line trace's inductance shall increase the resistance of PCB. On the condition of higher frequency, power face and resistance of trace shall not be ignored. If trace 's length equals to or is close to odd times of 1 /4 wavelength, the resistance shall be quite high, and trace or ground leading-in shall like antenna radiating RF energy.
When element circuit and signal line is above 1 MHz, single point grounding shall not be considered. 希望对你有帮助,谢谢!