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

John Fisher (jmfisher@cisco.com)
Fri, 13 Nov 1998 15:25:48 -0800

Hello,

Something related and of interest I think.

A new component available from AVX is called |Z| chip. It is an AC termination (R in series C) both in an 0805 SMT pkg. They had limited values a few months back;

100 pF, 47 Ohm
68 pF, 51 Ohm
47pF, 100 Ohm
33pF, 150 Ohm

Hope this is helpful, Regards

John

*********************************************************************
John M. Fisher -- Cisco Systems -- jmfisher@cisco.com
170 W. Tasman Dr., Bldg G, San Jose CA 95134-1706
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Signal Integrity Engineer, Enterprise Line of Business
N6PFN
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in At 10:14 AM 11/13/98 -0800, Abe Riazi wrote:
>Hi:
>
> As it was stated earlier, I have not used RC termination in an actual
>design. However, the rules that I referred to in my email are well
>established.
>
> When design geometry gets complicated so that you can no longer rely
>on rules of thumb or simple formulas, then you must SIMULATE to find the
>complete answer. It seems to me that for your application, simulation
>must be of hierachical type taking into account a daugther board plugged
>into a motherboard.
>
> Regards,
>
> Abe Riazi
> Anigma Inc.
>
> email: ariazi@anigma.com
>
>>----------
>>From: Roy Leventhal[SMTP:Roy_Leventhal@mw.3com.com]
>>Sent: Friday, November 13, 1998 8:09 AM
>>To: Si-list@silab.Eng.Sun.COM
>>Subject: [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?
>>
>>Best Regards,
>>
>>Roy
>>
>>
>>
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>
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