On 26/02/15 21:43, Josh Koffman wrote:
> The power side is fine, I can work that out. What I don't know is if I
> can use an Ethernet pulse transformer for a different signal. On the
> surface, it seems plausible as both are differential signals. But I
> would guess my speeds are significantly lower, and I have no
> experience designing anything like this.
>   =20
The key thing to remember about transformers is they are bandpass=20
devices. Picking the datasheet for a random ethernet transformer (=20
http://www.bothhandusa.com/datasheets/filter-transformer/10-100-single-smd/=
TS8121CM%20HF-RevA02-111027.pdf=20
) shows that it's performance is specified for 100kHz to 100MHZ.

So you need an encoding speed and type that are suited to such a=20
channel, That generally means you want to ensure DC balance (that is an=20
equal ammount of high time and low time) over reasonablly short=20
timescales and you want to use a suitiblly high data rate. Techically=20
it's probablly possible to recover signals that don't meet these=20
constraints but the recovery circuit would be tricky.


--=20
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