Re: [SI-LIST] : Diode Termination of Transmission Lines

Roland F. Portman (portman@bitmicro.com)
Wed, 10 Jun 1998 09:25:28 -0700

Peter,

Besides Ron's suggested readings below, you may want to look at
California Micro Devices
technical literature web page
http://www.calmicro.com/prod/techdocs.htm They have several
articles on various types of termination in addition to Schottky Diode.

Roland

Ron Wilhelmson wrote:

> Hello Peter,
>
> Thought I would give you a couple of pointers to diode termination
> information.
>
> Schottky Diode Arrays by Eilhard Haseloff
>
> http://www.ti.com/sc/docs/asl/lit/eb194.htm
>
> Terminating Traces on High-Speed PCBs
> by Steve Kaufer and Kelle Crisafulli
>
> Published in the March, 1998 issued of Printed Circuit Design
> or contact them at Hyperlynx.
>
> I have had at least one design with high overshoot problems with
> multiple driven PCI bus nets. The only solution, without major
> component reselection, was diode termination to clamp the overshoot
> problem to an acceptable level.
>
> I would use them again and hope to see additional termination options
> in future vendor simulation software for analysis purposes.
>
> --
> Regards,
>
> Ron Wilhelmson
>
> CAE/CAD Applications
> Cisco Systems
> 7025 Kit Creek Road
> RTP, NC 27709-4987
>
> Phone: 919-472-3329 Numeric Page: 1-800-796-7363 pin 1000194
> FAX: 919-472-2177 Voice Page: 1-800-365-4578
> Email: rongw@cisco.com Email Page: rongw@epage.cisco.com
>
> Peter Baxter wrote:
> >
> >
> > Hi,
> >
> > Might anyone be able to point me in the direction of some
> PRACTICAL
> > application information on using Diode Termination on
> Transmission
> > Lines. In particular for PCB1/Ribbon Cable/PCB2 interconnection
> as
> > well as one side of a PCB to the other side.
> >
> > Most of the information that I have seen so far doesn't do
> anything
> > more than give a brief overview. I was hoping on getting
> information
> > on the diodes used and any of the pitfalls.
> >
> > Thanks
> >
> > Peter Baxter
> >
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--
Roland F. Portman
BiT Microsystems, Inc.
48499 Milmont Drive
Fremont, CA  94538

(510) 623-2341 Ext 129 (510) 623-2342 Fax

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