[Libre-silicon-devel] ADC for Northpoint

David Lanzendörfer david.lanzendoerfer at o2s.ch
Mon Feb 25 14:12:28 CET 2019


> > That's a heck of a lot of protocols covered, an extremely high bang per
> > buck ratio.
> Well, I already put differential driver and receiver on my personal wish
> list. Unfortunately my skills in such analog cells are kind of limited..
> Someone with more knowledge and experience in this area should take the
> task.
> And, as long as we are in the higher voltage supply range differential
> IO cells are not so quite common. This cells become more interesting
> with 3.3 Volt and below.

Yes. We right now are not remotely in the frequency range, where such cells 
would make sense.
> > Variants can be to change the impedance eg for DDR3/4 however just
> > dropping in some resistors inline would be a temporary substitute, so it
> > is not so essential (impedance matching on DDR3/4 is absolutely
> > essential and is done dynamically by the PHY)
> You mentioned MIPI in the list above also - this seems to be very
> challenging, the voltage drop between high and low is smaller than LVDS.
> But yes, MIPI is nowadays everywhere in cheap devices, from cameras to
> displays and entering the IoT market also.
> So it would be nice if someone of you takes the task 

Mohamed from eFabless offered us help, as soon as we've got the process 
datasheet done.
eFabless has some pretty experienced analog designers.
I suggest we work together with them, as soon as Victor and I have 
reproducible results which warrant a measurement for simulation models
and the data sheet.
We're not quiet there though.

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