| 摘要: |
| 印刷电路板设计中的同步开关噪声问题是现代高速数字电路应用的瓶颈之一。介绍了一
种在电路板上施加同步开关报文和温度应力的可靠性测试方法，该方法可以有效暴露电路
板上的同步开关噪声问题。借助噪声测试和阻抗分析手段，对一个由该方法发现的异常问
题进行了分析，通过优化去耦电容和电源平面阻抗，抑制了电路板上的同步开关噪声，
问题得到了完美解决。最后，给出了一些在PCB设计中抑制同步开关噪声的方法和建议。 |
| 关键词: 同步开关噪声 印刷电路板 信号完整性 电源完整性 可靠性
测试 |
| DOI： |
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| 基金项目: |
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| Analysis of simultaneous switching noise problem in PCB design |
| LI Ying-hong,LUO Yong |
| () |
| Abstract: |
| In the application of modern high-speed digital circuits, one of the b
ottlenecks is the simultaneous switching noise in printed circuit board（PCB） d
esign.
A reliability test method applying simultaneous switching message and temperatur
e
stress to circuit board is introduced in this paper.With this method the simult
aneous switching noise problem in circuit board can be effectively exposed. By m
eans of the
noise test and impedance analysis, an abnormal problem discovered by the method
is analysed. Through optimization of the decoupling capacitor
and the power supply impedance, the simultaneous switching noise is suppressed i
n the circuit board, and the problem is solved perfectly. Finally,
some methods and suggestions for suppressing simultaneous switch
ing noise are provided during PCB design. |
| Key words: simultaneous switching noise printed circuit board signal integrity power int
egrity reliability test |
