Reasonable of PCB board layer design
According to the complexity of the circuit, the reasonable choice of PCB board layer mathematical can effectively reduce the electromagnetic interference, reduce the volume of PCB and the current circuit and branch line length, reduce the cross interference between signals.The experimental results show that the same material, four layer board is lower than the noise of the double plate 20 db, however, the higher plate layer, the more complex manufacturing process, the manufacturing cost is higher. PCB board size is too large, will lead to the growth of printed wiring, impedance increases, the ability to resist noise, the increase in the volume of equipment is also increased. If the size is too small, the heat dissipation is not good, and the adjacent lines are vulnerable to interference.
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