SV: Re: [sdiy] IC Prototyping was: SSM2040

[karl dalen]

Yeah, there has been talk on and off about redoing chips back in time at sdiy,
however i would like to chime in to what Jay says, instead of just copying
something old it would be nicer to get a new chip that has 5 or 6 independent
and linear OTA's , then you can build whatever you like. To save pins
one could run two OTA's from the same control pin as for a VCF application,
etc.

But still it all hangs onto volume i read somewhere Onchip did customs
only in min orders of 25k , and thats a lot of chips!

KD


-- Dave Manley <dlmanley at sonic.net> skrev:

> Neil Johnson wrote:
> >
> > I came upon this email from Paul Schreiber:
> >
> >     http://search.retrosynth.com/synth-diy/search/lookit.cgi?-v0505.1123
> >
> > More can found with the search pattern "doug curtis paul".  I won't 
> > quote it (you can read it yourself) but suffice it to say that the 
> > CEMs ARE made from analogue arrays.
> Thanks for the link.  Reading the archives I see this area has been well 
> mined before. I had guessed arrays were not used in production because I 
> assumed the CEM volumes would have been large enough to justify a custom 
> design (or the analog equivalent of a digital standard cell design).
> 
> -Dave
> 
> P.S.  While googling I see that Hans Camenzind founded Interdesign, and 
> in addition to the 555 is responsible for the 8038.
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> 



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