[SI-LIST] Re: Impedance match of a 100Mhz line
- From: "Andrew Ingraham" <a.ingraham@xxxxxxxx>
- To: <si-list@xxxxxxxxxxxxx>
- Date: Tue, 10 Mar 2009 23:01:25 -0400
> Thanks. By placing a terminating resistor on the far-end would'nt that
load
> the driver (5V source, 5V/50Ohms =>100ma)
Yes. If you use a termination, the driver must be capable of driving it.
That's one advantage of source-terminated nets.
Many digital logic families (other than *ECL) are stressed less by
connecting the termination resistor to a DC voltage between the high and low
logic levels. That would cut the current in half and make it more
symmetrical.
Another possibility is an RC termination. And there are others.
Andy
------------------------------------------------------------------
To unsubscribe from si-list:
si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field
or to administer your membership from a web page, go to:
//www.freelists.org/webpage/si-list
For help:
si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field
List technical documents are available at:
http://www.si-list.net
List archives are viewable at:
//www.freelists.org/archives/si-list
or at our remote archives:
http://groups.yahoo.com/group/si-list/messages
Old (prior to June 6, 2001) list archives are viewable at:
http://www.qsl.net/wb6tpu
Other related posts:
