[SI-LIST] Common mode perfornace of Serdes Channel

  • From: Tesla <emcesd@xxxxxxx>
  • To: si-list@xxxxxxxxxxxxx
  • Date: Wed, 1 Apr 2015 16:46:57 +0800 (CST)

Hi Expert


In the case of optimizing channel IL and RL, most time we only consider the
differential mode of channel. For example, Using larger antipad for via and
void the plane beneath the AC capacitor to improve the differential IL, while
degrading the common mode performance.
My question is that the common mode performan relly do not affect the Eye? Can
we always let the common mode perfomance of channel be?


Thanks and Best Regards.


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