PCB Design - Multi-Layer PCB Design
A PCB has via stitching on the ground plane spaced at 5 mm intervals, yet noise levels remain high. What is the most probable reason?
A PCB has via stitching on the ground plane spaced at 5 mm intervals, yet noise levels remain high. What is the most probable reason?
medium📝 Formula Result Q5 of 15
Step-by-Step Solution
Solution:
Step 1: Analyze via stitching effectiveness
Effective via stitching requires vias to connect all ground layers properly.Step 2: Identify cause of noise
If vias are not connected to ground planes, stitching fails to reduce noise.Final Answer:
Vias are not properly connected to the ground plane layers -> Option AQuick Check:
Check via connectivity to ground layers [OK]
Quick Trick: Ensure vias connect all ground layers to reduce noise [OK]
Common Mistakes:
MISTAKES- Assuming via size affects noise directly
- Blaming PCB material instead of via connectivity
- Placing vias only on one layer without interlayer connection
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