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
- Trace Length
- Reference Change
- Return Current Path Discontinuity
- SG Trace
- Decoupling Capacitor
- Differential Signal
- X Talk
- Digital/Analog Interference
- IC Ground Split
Check return path for GND pin [Return Path]
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]
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.