Doug Brooks
At 10:17 AM 8/27/99 -0700, you wrote:
>Dear all:
>
>We are designing a Rambus related product which requires the PCB to
>maintain
>28 Ohm +/- 10% trace impedance.
>However, what we have found that a straight line trace will get a higher
>impedance (through TDR, 1 Ohm or more) than
> a trace with many turns on it. We know a turn on the trace will change
>the
>impedance. However, is it the root cause
>that make our trace impedance not consistent?
>
> Two traces are on the same layer, with the same trace width.
>
>
>+---------------------------------------------------------------------------
>------------------------------------+
> Straight line
>
> +-----------+ +------+ +---- \\\\ -----+
>+------------------------+
> | | | | | |
> | | | | | |
> +-----+ +----+ +---+
> line with turns
>
>
>Allen
>
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>
>
>
.
****************************************************
Doug Brooks, President [email protected]
UltraCAD Design, Inc. http://www.ultracad.com
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