-----Original Message-----=20
From: Sean Breheny
Sent: Friday, October 22, 2010 11:51 PM
To: Microcontroller discussion list - Public.
Subject: Re: [EE] Clock IC for phase shifting

>I just found the answer to my own question - they have a custom ASIC
>which is a monolithic 40G sample/sec ADC using SiGe (Silicon
>Germanium) technology.

Yes, they do some pretty amazing things at the top end, all with their own=
=20
custom chips of course. No chance of ever competing there (unless you start=
=20
designing your own ASICs, you never know, maybe one day if enough money=20
makes an appearance... :-) ) Would give my right arm to see the designs and=
=20
theory behind stuff like that. However even 15 year old documents from=20
companies like these are of great interest to the lower spec designs, I was=
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reading about a 8 Gsps design by HP made back around 1994 (IIRC) which they=
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make available in their archives (I think it's made public after a specifie=
d=20
period like 15 years or so, probably varies from company to company but=20
that's the general idea I got when foraging for info)

I am interested to see what can be done with off the shelf stuff, as it's=20
improving at a rate of knots - you can grab a 1Gsps ADC from Digikey for=20
just over =A3100(!), and they have up to 3Gsps available (~=A3500) so it's =
seems=20
there is plenty of options open for experimentation (just hope the financia=
l=20
options are similar when I get round to it..)=20


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