[pcbforum] Re: clock routing
- From: "ROM" <rom@xxxxxxxxxxxxxxx>
- To: <pcbforum@xxxxxxxxxxxxx>
- Date: Fri, 30 May 2003 11:37:04 +0530
well,
i would suggest u not to route the clock signals in serpantine manner, not
only clock signal, any high frequency or oscillating signals for that
matter. Yes, Clock signlas or signals from Crystals or high frequency
devices must be routed with shortest traces as possible, but in this case,
say 2.5 inch has been specified because its a clock signal which is going to
trigger few ICs, and they have to be triggered after certain delay, and the
length of the route 2.5 inch will provide the delay required for that ic to
be triggered. Just route the trace as lengthy as possible, but try avoid
routing the signal in a closed serpantined manner. that may result in
crosstalk and may induce noise to the nearby circutries
any suggestions from members..??
Regards
ROM
----- Original Message -----
From: "rishikesh pawar" <rishi179@xxxxxxxxxxx>
To: <pcbforum@xxxxxxxxxxxxx>
Sent: Friday, May 30, 2003 11:25 AM
Subject: [pcbforum] clock routing
> hi all ,
> i am new subscriber, i have been reading all ur mails and found very
helpfull in designing.
>
> i am designing board with plx chip with pci slot, the specification given
that pci to plx signal should be small as possible , but clock signal must
be 2.5 inches, i have routed clk in serpentine manner(tunning method) to
match length, but i read somewhere that clk signal should be straight as
possible, but how it could be possible to have matched length without
tunning. or tunning method will do for clock,
>
> suggest me best option.
>
>
> thanks in advance.
>
> rishi.
>
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