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去耦电容的放置



比如说DDR2的内存颗粒电源需要去耦,请问去耦电容放在BGA的背面,通过过孔连接比较好,还是放在BGA的旁边,拉线过去连接好?

  • 记得过孔的布线电感远大于连线电感,而去偶电容需要尽可能小的分布参数,因此个人觉得放在旁边合适的位置更好。另外放置过程中让供电先到达去耦电容,然后达到颗粒电源是不是更好一些?