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差分高速信号走内层,EMC很好控制;如果走表层好像有问题
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我个人认为差分线平面,差分线外的磁场比较弱,因为两条线电平相反,但是两条线之间的磁场是增强了的。所以我认为差分线之间垂直于PCB板的磁场很强,两条线产生的叠加了。那么差分线过度(太长)放在PCB表层会引起EMC问题。这是我个人理解。( y) g- B# {# H# @; ?
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If by life,you were deceived.
Don't be dismal ,don't be wild!
In the day of grief,be mild!
Merry days will come, believe.
Hearts is living in tomorrow.
Present is dejected here:
In a moment, passed sorrow
that which passes will be dear.
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