Hello,
It is somehow the same, but I change my personal naming since quite a
while to "DC-Blocking" caps, as this is naming seems to fit the purpose
better.
For discussions with customers this somehow simplifies life a little bit ..
Hermann
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Am 11.06.2015 um 09:06 schrieb Havermann, Gert:
Hi Savi,
the Name "AC Coupling Cap" already contains the answer to your question about
why we need them. Coupling AC means blocking DC. For removable electronics
the main purpose is protection to block DC currents when TX and RX are on
different DC Levels while mating. But they are also helpful on large boards
with DC drops in Power distribution. Some Silicon does react on these DC
differences.
BR
Gert
From: Sathvik SI<mailto:savi.hwsi@xxxxxxxxx>
Sent: 11/06/2015 01:28
To: si-list@xxxxxxxxxxxxx<mailto:si-list@xxxxxxxxxxxxx>
Subject: [SI-LIST] AC coupling Caps -- High Speed Serdes
Hi,
Why we need AC coupling caps for high speed serdes lines?
Where do we need to place them in the PCB, close to RX or TX ? If it is at RX
why?
If any one is having good application note , Please share with me.
Regards,
Savi
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