[SI-LIST] Re: Adding trace length for timing adjustment
- From: "Salkow, Steven" <steven.salkow@xxxxxxxx>
- To: "'doug@xxxxxxxxxx'" <doug@xxxxxxxxxx>, si-list@xxxxxxxxxxxxx
- Date: Thu, 15 May 2003 16:35:03 -0700
There are many factors including mutual coupling to itself and neighbors.
Capacitance and mutual inductance fall off with distance hence for the
minimium trace to trace values used in your circuit to avoid crosstalk
similarly width spacing applies. Under the ideal condition, it may not
matter which way you choose but if you are pushing nearest neighbors or
scrimping on trace to trace due to routing density issues, snake like
sequential loops may be best for you. Use curves not 45 dgree bends to avoid
discontinuities.
Steven Salkow
Lockheed Martin
3200 Zanker Rd
San Jose, CA 95134
(408) 473-4058
steven.salkow@xxxxxxxx
Fax (408) 473-3044
> -----Original Message-----
> From: Doug Brooks [SMTP:doug@xxxxxxxxxx]
> Sent: Thursday, May 15, 2003 10:09 AM
> To: si-list@xxxxxxxxxxxxx
> Subject: [SI-LIST] Adding trace length for timing adjustment
>
>
>
>
> I know there are several different views on this subject.
>
> Suppose I need to add some additional length (time) to a trace and am
> considering three different strategies:
>
> 1. a randomly meandering length
> 2. a "trombone-like" length down and back
> 3. more, shorter snake-like loops
>
> What do people see as the different trade-offs for these three different
> strategies under differing conditions?
>
> Doug Brooks
>
>
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