(http://img259.imageshack.us/img259/2149/tave.th.png) (http://imageshack.us/photo/my-images/259/tave.png/)
Do you guys think this'll work? :)
Should work, the filter part probably won't behave exactly the same as using an opamp so the harmonic rejection might not be as good, but it should do the job.
Original, to save others looking for it http://www.eskimo.plus.com/fxstuff/slacktave.png (http://www.eskimo.plus.com/fxstuff/slacktave.png)
At least it's a bit easier to breadboard this way :) I guess I gotta model both versions in Spice.