Re: [SI-LIST] : MECL System Design Handbook

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From: Dr. Edward P. Sayre (esayre@nesa.com)
Date: Thu May 17 2001 - 18:46:54 PDT


Lee and others:

I don't know what kind of TDR or fixturing you might have used, but the
excess capacitance is very real and can be seen. It is also illustrated in
a number of microwave books. If your fixturing caused a significant loss (>
100 ps) of risetime of the step out of the TDR, then the capacitance effect
will be washed out.

Sincerely,

ed sayre
==========================
At 08:36 AM 5/10/01 -0700, Ritchey Lee wrote:
>Any of you who want to know how the myth about right angle bends got
>started, look
>at figure 7.17 on page 155. This alleges that right angle bends can be
>seen by a
>TDR. I've done this measurement dozens of times and coiuld never see a right
>angle bend.
>
>A few years ago, I called Mr. Blood the author of the book and asked
>about the
>diagram. His reply was that he knew the diagram was flawed, but there
>wasn't time
>to fix it before the book went to press.
>
>As a result, thousands of engineers have spend countless time worrying
>about right
>angle bends.
>
>When we publish technical information such as this, it is important to
>insure it
>is accurate.
>This applies especially to applications notes, whic often contain entirely
>false
>data.
>
>Lee
>
>Rich Peyton wrote:
>
> > FYI,
> >
> > The hard copy can be ordered free of charge.
> >
> > Rich
> >
> > Roehrner Wolfgang wrote:
> >
> > > http://www.onsemi.com/home <http://www.onsemi.com/home>
> > >
> > > In the Menu-tree go to:
> > >
> > > Technical Documents
> > > CD/Document Ordering
> > > General Search
> > >
> > > search for document number: hb205
> > > download it as pdf (or order!).
> > >
> > > regards,
> > > Wolfgang
> > >
> > > -----Original Message-----
> > > From: Ashok Babu K [mailto:k.ashokbabu@gdatech.co.in]
> > > Sent: Tuesday, April 10, 2001 12:39 PM
> > > To: si-list@silab.eng.sun.com
> > > Subject: [SI-LIST] : MECL System Design Handbook
> > >
> > > Hi all,
> > > I see that a good resource for general high speed termination design and
> > > especially ECL/PECL termination is Motorola's MECL System Design
> Handbook by
> > > Blood Jr., and William R. Many articles and papers specify the same as a
> > > good resource. Unfortunately I could not get the soft copy of the MECL
> > > System Design Handbook. I could not get it from the ON Semiconductor
> > > website. If any of you have the PDF file of the same or know where it
> can be
> > > obtained, please inform me. Any suggestions of other resources are highly
> > > welcome.
> > > Regards,
> > > Ashok.
> > >
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