The gain in your circuit is higher than the original however, wave form is triangle. At least in the sim it is.
Even with my variant, it isn't perfect. the node on the (-) input with the 10k and 1uf must have a Q = 1, otherwise, we'll get some effects that we don't want. This also means the 16hz that is in the spec can not vary too far from this point.
Jamie
This circuit works great. Nice 8Vpp sinewave output from 12V supply rail. I will try the others Fred sent too, as a learning exercise, and to discover how my orignal circuit went wrong. It keeps me awake at night.
Thanks to everyone in this group for taking the time to look over my shoulder.
David White
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