[SI-LIST] Re: No need of termination within critical length??
- From: steve weir <weirsi@xxxxxxxxxx>
- To: "Sonu Kurian N.D" <sonukurian@xxxxxxxxxxxxxxx>
- Date: Thu, 17 Sep 2009 01:02:39 -0700
In a transmission system you don't want old information interfering with
new information. Interference occurs when old transitions reflect back
and forth between the driver and receiver. An ideal infinitely long
transmission line never reflects data. Matched terminations approximate
the ideal infinite transmission line. A zero length transmission line
has the same voltage amplitude: that of the driver at its single point
in space. A sufficiently short transmission line approximates the zero
length case.
Steve.
Sonu Kurian N.D wrote:
> Hi All,
>
> I am puzzled about why termination is not required if trace length is
> less than critical length.
> I read like if a driver encounters a reflected signal when it is
> rising(driving) , its able to absorb reflection.Is it so?
> Or is the situation like ..the reflections will be there..but the Setup
> condition can be met..so we need not worry..??
> Can anyone please throw some light on this..
>
> Many thanks,
> Sonu
>
>
>
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