IR3109 ?

[Mike Kent]

>> Sometimes Roland might select a component from another manufacturer (such
>> as Curtis) but in some cases Roland designed their own. When Roland, or
>> another company, designs their own chips (such as Roland's IR3109 filter),
>> products can have a unique sound, hopefully resulting in a unique value.
>
>Mike, surely each chip has its own character and own value. Differences
>between various CEM and SSM products, or discrete solutions a la
>Moog and ARP are quite well understood now, but there seems to be a
>lack of knowledge about the internals of Roland chips. The
>general behaviour, building blocks etc are known of course.
>But what are the specialities in technology?
>How would a IR3109 gm cell differ from a CEM3320's or SSM2040's ?
>If you have any information about this, be sure it would be highly
>welcome! (I'm crossposting to DIY - would be better than on AH).

Sorry, I don't know anything about IR3109 to be able to give you details.
It dates back to before I had any connection to R&D.
Mike.

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