RE: [SI-LIST] : RE: RC terminations on multidrop busses

Abe Riazi (ariazi@anigma.com)
Fri, 13 Nov 1998 10:20:19 -0800

Hi:

AC termination is another name for RC termination. The purpose of
resistor is to match the impedance of trace. The capacitor holds the DC
signal component and allows AC current to flow to ground during the
transition (switching) stages of the signal.

Regards,

Abe Riazi,
email: ariazi@anigma.com

>----------
>From: homann@erv.ericsson.se[SMTP:homann@erv.ericsson.se]
>Sent: Friday, November 13, 1998 8:36 AM
>To: Roy_Leventhal@mw.3com.com
>Cc: Si-list@silab.Eng.Sun.COM
>Subject: Re: [SI-LIST] : RE: RC terminations on multidrop busses
>
>
>> Abe,
>>
>> Thanks for your reply.
>>
>> If I read it correctly, you are talking about RC terminations at each end
>> of the backplane line. Have you ever looked into RC terminations at the
>> receivers / drivers on the daughter board stubs?
>
>I have to ask,
>
>Is the RC termination you mentioned the same as an AC-termination (cap+res
>to ground from signal) or is it a low-pass filter (res in series with signal,
>cap to ground). I've seen both used, but have never found a reason to use
>either in my designs. Yet.
>
>Magnus Homann
>Ericsson Mobile Data Design AB
>
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