Speaking of Sine Shapers

[Terry Michaels]

Message text written by Haible Juergen
>The same thing must work with a standard OTA and an external
feedback loop ! And it does. 3080 driving inverting opamp at
virtual GND summing node. Output of opamp *slightly* fed back
to the OTA's noninverting input. Works like a charm. 
I'll post a circuit of this with the next PolyModular update.

JH.

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Hi Juergen:

I came up with a very similar circuit about 6 months ago, but I didn't get
around to posting it right away.    Works very well, just like you said.

Terry Michaels