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Date: Sun, 13 Oct 2002 22:11:14 +0200
From: Rene Tschaggelar
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Subject: Re: Twisted Pair High Data Rate Design
LVDS is 3mA into 100 ohms. This would require to have the GND
together with the signal. Though the specified distance is usually
just a few meters, you don't need the 400MBits. Just give
it a try.
What about induced spikes ?
How good E- and H-field shielded is the cable ?
Ing.Buero R.Tschaggelar - http://www.ibrtses.com
& commercial newsgroups - http://www.talkto.net
Justin Farrelly wrote:
> Thanks Allan,
> Using ghost power already at 48VDC. We have about 200mW to play with
> due to architecture constraints on the physical layer/TX power side for a
> duplex circuit. Current design methodology uses Spartan to do all the work,
> although that takes a wedge of power to crank up, we are OK on running
> power (just). Most PHY soloutions seem to be around about a watt...
> Ideally I am trying to find an ultra low poer soloution, and am concidering
> adapting some of the current wireless devices such as the new chipset from
> Xtreme Spectrum (dumping the RF side).
> If you know of any ultra low power devices, or any really good transmission
> engineers looking for a project.....
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