You need to design a PCB to minimize EMI for a sensitive analog circuit near a noisy digital section. Which combined approach is best?

hard📝 Scenario Q15 of 15

PCB Design - Advanced Routing Techniques

AConnect analog and digital grounds directly without separation and use long traces

BUse separate ground planes for analog and digital, add shielding, and place decoupling capacitors near ICs

CRemove all filtering components and rely on software correction

DPlace all components close together without shielding to save space

Step-by-Step Solution

Solution:

Step 1: Separate analog and digital grounds
Separating grounds reduces noise coupling between sensitive and noisy sections.
Step 2: Add shielding and decoupling capacitors
Shielding blocks EMI; capacitors stabilize power supply and reduce noise.
Step 3: Avoid poor layout practices
Direct ground connection without separation and long traces increase EMI; software correction alone is insufficient.
Final Answer:
Use separate ground planes for analog and digital, add shielding, and place decoupling capacitors near ICs -> Option B
Quick Check:
Combined grounding, shielding, filtering reduces EMI best [OK]

Quick Trick: Separate grounds and shield sensitive circuits [OK]

Common Mistakes:

MISTAKES

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