[time-nuts] Really fast ADC needed

Graham / KE9H ke9h.graham at gmail.com
Thu Oct 30 13:27:39 EDT 2014


A startup in Massachusetts named Hypres has/had exactly what you want.
It is a cryogenic delta-sigma converter using some kind of quantum logic.
As I remember it did about four bits per sample at up to 40 Giga-samples
per second.
You have to run it submerged in liquid Helium.  But they would sell you the
liquid
helium generator system as part of the package.

http://www.hypres.com

But I can't get their web-server to come up, today.  So either some IT
problems,
or they are out of business.  If you Google them, they come up in the
search, so
either they are still around, or were recent enough for Google to remember.

I would like to see what you are going to use to absorb 120+ Gigabits per
second of
continuously streaming data.  It will take a server cluster, doing nothing
else, if you
can figure out how to parallelize the problem.

Good luck,
--- Graham

==


On Thu, Oct 30, 2014 at 10:55 AM, Sebastian Diaz <sebas.diaz at gmail.com>
wrote:

> Fujitsu used to sell ultra-fast charge mode interleaved sampler (CHAIS)
> ICs.
> These have analog bandwidths of ~20GHz and sampling rates of 65 GS/s, 8-bit
> resolution, with ENOB 5-6.
>
> They pipe data out at  a max 128 bit* 500MHz (8 GB/s). How are you planning
> to digest this data stream?
>
> Regards,
> Sebastian
>
>
>
>
>
>
>
> On Thu, Oct 30, 2014 at 7:23 AM, Alexander Pummer <alexpcs at ieee.org>
> wrote:
>
> > pipeline converter, but it needs as many clock period as the required
> > bits, does he has the fast logic to deal with that amount of data?
> > 73
> > KJ6UHN
> > Alex
> > On 10/29/2014 9:46 PM, Mark Sims wrote:
> >
> >> A friend of mine is looking for an ADC that can do 5 bits at 20-40
> >> gigasamples/second...  there is a timing related component to the
> project.
> >> Any ideas of who makes a decent beastie?  It needs to supply continuous
> >> data so things like a fancy scope won't do...
> >>
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