2040/3320 Differences? was Re: also... Re: [sdiy] SSM2044 Filter schematic??

[Scott Stites]

I'm confused now - what exactly was the reason the production was ceased on
the 2040?  As I understand it, there was a charge of infringement or
something like that with the 2040 design.  I had thought that it was because
of similiarities of the 2040 to transistor ladder filters, but now I know
better - the 2040 is four VC gain cells, like the CEM3320.  Was it the
similiarity to the CEM3320 that contributed to the 2040's downfall?

Also, from what I gather, the 2040 was one sweet chip - I have never read
any disparaging remarks about it, though it seems rather common for the
3320 - for example, in remarks about differences between rev's 2 and 3 of
the Prophet 5.  What differences were there between the two chips that cause
such a disparity of perception?  I'm quite curious about that.

BTW, I've made a module out of Rene Schmitz's 2040 clone, which is based on
JH's 2040 clone, and it is definitely very, very sweet.  If the original
2040 was like that, I can see why it is such a coveted little chip.

Cheers,
Scott


> The similarity between CEM 3320 and SSM 2040 is striking. The SSM 2044 is
a
> totally different breed altogether.