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EMIStream for 2-Layer Boards

EMI Rule Check for 2-Layer Boards

EMIStream for 2-Layer Boards consists of eight design rule check items that are selected and specialized for 2-Layer PCBs. It points out the cause of EMI problems and suggests solutions.

EMI Check Items for 2-Layer Boards

  1. Trace Length
  2. Reference Change
  3. Return Current Path Discontinuity
  4. SG Trace
  5. Filter
  6. Decoupling Capacitor
  7. Differential Signal
  8. X Talk
  9. Digital/Analog Interference
  10. IC Ground Split

Check return path for GND pin [Return Path]

Return Check

Check return path length from the end of signal to GND pin

Even if ground and signal are parallel, the length of return current path from the end of signal to the GND pin causes additional emission.

Current loop check [Decoupling capacitor]

GV loop

Check the current loop length between IC and capacitor

Important to check whether the current loop length between them is the minimum path.
* The capacitor whose loop is the minimum around IC will be checked.