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Shielding sensitive signals with ground in layout design

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Junus2012

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Hello,

I have sensitive signal path on my layout that need to be shielded by the analog ground,
could you please tell me how to shield?,
does shielding mean that I will route a higher metal layer over my signal and connect it to ground ?

Thank you
Best Regards
 

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Ideally, you should shield your clock lines so that they don't couple to other nodes.
You can do that by making M1 (GND) - M2 (clock lines) - M3 (GND) to shield them. But you should consider that there will be more parasitic capacitances in your clock lines and therefore you should account for that when driving those lines.

Hope this helps.
 
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