串扰与噪声

Crosstalk is the undesirable electrical interaction between two or more physically adjacent nets due to capacitive cross-coupling.

串扰噪声产生的原因：

1. Increasing number of metal layers
2. Vertically dominant metal aspect ratio
3. Higher routing density due to finer geometry
4. Larger number of interacting devices and interconnects
5. Faster waveforms due to higher frequencies
6. Lower supply voltage

 Crosstalk修复

　　1.增加net间距，减小耦合电容。

　　2.改变net的顺序（不要将若驱动net和强驱动net相邻）。

　　3.改变net的layer。

　　4.将long net打断 （耦合电容和net长度成正比）。

　　5.在victim net两侧增加shielding net。

　　6.在victim net两侧增加shielding net。

 

参考：

https://mp.weixin.qq.com/s/q_06vEFM3XGhElzKYPXUMA

https://mp.weixin.qq.com/s/eVpUidbE__cJGIreKZHafQ