Anyone know of a design for a -simple-tunable- low distortion sine wave oscillator (audio frequency range)

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Oh, I was thinking about this the other day. Do you take your 'signal' from the output of the opamp? If you pick off the signal, with another opamp, from the non-inverting input you get another ~10dB of harmonic reduction from a single RC stage.

(Not quite sure of how much it's reduced right at 'resonance' so to speak, but I think it's 10dB.)

George H.

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Any idea of getting the sort of specs you're looking for from an 8038 is wildly optimistic. Those things are a car crash.

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Sorry all - I've been a bit distracted. I'll get back to you all in a day or two - thanks for many good ideas to try / think about