PCB Design - Advanced Routing Techniques
A PCB layout has two signal traces routed parallel for 10cm with 0.2mm spacing. The designer wants to reduce crosstalk but mistakenly reduces spacing to 0.1mm. What is the error?
A PCB layout has two signal traces routed parallel for 10cm with 0.2mm spacing. The designer wants to reduce crosstalk but mistakenly reduces spacing to 0.1mm. What is the error?
medium🧠 Conceptual Q6 of 15
Step-by-Step Solution
Solution:
Step 1: Analyze spacing impact
Smaller spacing increases electromagnetic coupling, raising crosstalk.Step 2: Identify mistake
Reducing spacing from 0.2mm to 0.1mm increases crosstalk, opposite of desired effect.Final Answer:
Reducing spacing increases crosstalk, worsening the problem -> Option AQuick Check:
Less spacing = More crosstalk [OK]
Quick Trick: Don't reduce spacing to fix crosstalk; it backfires [OK]
Common Mistakes:
MISTAKES- Assuming smaller spacing reduces crosstalk
- Ignoring electromagnetic coupling effects
- Believing signal delay is the main factor
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