[SI-LIST] AC coupling placement

  • From: Ben Rothchild <benrothchild@xxxxxxxxx>
  • To: si-list@xxxxxxxxxxxxx
  • Date: Thu, 31 Jan 2002 04:04:51 -0800 (PST)

Hello Experts,

I have a question on AC coupling.
While AC coupling a high speed serial
link to match levels, where should
the AC coupling capacitor be placed.
Close to transmitter/close to receiver/
or doesn't matter, can be placed 
anywhere on the link.

What should be the value of the AC
coupling capacitor or rather how
do I calculate it. Is it dependent on
frequency. I am trying to AC couple
signals of 155M, 622M, 1.25G and 2.5G.
Any special care to be taken at these
different frequencies.

Thanks for any advice.
Ben


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