Emu SSMs (was Re: [sdiy] A potential problem with a voice-assignable organ)

[Scott Nordlund]

> If you want to understand the 2044, then look at the Moog filter transistor
> Ladder. It was very similar, but yet a bit different in approach.

I had suspected as much due to the way the capacitors are connected.  Any more details?

> The Patents on the SSM2044 probably ran out quite a while back and it could
> be nice to re-build this chip with a few improvements on Thermal stability
> For tracking a CV in oscillation mode when the Q is turned up.

Got any specific patent numbers?  I'd be interested in reading them.

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