In the development and production of printed circuit board, the earlier attention and solution to PCB Board Electromagnetic Compatibility issues, the more manpower and material resources can be saved. If the cost of solving the electromagnetic compatibility issue in the PCB Board development stage is 1, then after the printed circuit board is finalized, the cost will be increased by 10 times; if it is solved after mass production, the cost will be increased by 100 times; if the problem is found at the user site after the solution, the cost may increase by 1000 times.
As a result of that, regardless of electromagnetic compatibility, the PCB board design is only carried out according to the routine, and then the electromagnetic compatibility test of the sample is carried out. The problem of resolving the Electromagnetic Compatibility Issue is not only a technical problem, but also a great waste of manpower and financial resources. Therefore, it is very necessary to design PCB board electromagnetic compatibility as early as possible.
Schematic diagram design and input
Layout PCB wiring pattern and components
Functional and Performance Test
PCB Manufacturing
NO
If pass？
YES
Verification, Functions, Performance and EMC
NO
Pass or not？
YES
The End
above procedures without analysis and measurement tools are used in this printed circuit board design process. Only by verifying the overall function and performance of the actual PCB or system can you know if there is a PCB Board Electromagnetic Compatibility Issue with the system. Once the problem is found, if the PCB is multi-layer board and the key chip is packaged in PQFP, BGA, PBGA, etc., it is impossible to perform tentative debugging by jumper and other methods, and the entire design process can only be restarted. Since the PCB cannot be patched, the fault point cannot be confirmed. This fault may remain in the next design or even a new fault point.
