[SI-LIST] Re: 180 degree turns in high speed lines

Jim,
It has been demonstrated many times that right angle bends or turns do not
adversely affect high speed signals.  Don't worry about this.  Worry about
things that matter such as crosstalk and proper use of terminations.  See
the attached excellent article by Doug Brooks.

Lee Ritchey


> [Original Message]
> From: <otter30@xxxxxxxxxxxxx>
> To: <si-list@xxxxxxxxxxxxx>
> Date: 2/27/2009 8:08:12 AM
> Subject: [SI-LIST] 180 degree turns in high speed lines
>
> Hello,
> Has anyone had experience with high speed traces that travel in one
direction on an inner layer of a pcb,
> and then transition to the top layer termination thru a via and then
change direction 180 degrees?
>
> The distance traveled on the top layer is short - just a short connection
between a termination resistor and the ic pins, but it's the turn that
concerns me.
>
> After all the debate through the years on 90 degree turns, I'm interested
in your opinions.
>
> Thanks,
> Jim
>
>
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