[sdiy] square to sine

[Paul Perry]

I've looked at V to F to a square, then integrating to a triangle - but the 
amplitude of the triangle varies with frequency.
Sure, you could correct for that with an AGC, but then your fast tracking is 
lost.
I still think that the traditional integrator is the way to go! if you want 
to stay analog.
Wanting audio rate modulation rules out a lot of approaches.

In my experience, it's easy to get a suare wave, and easy to convert a 
square to a triangle, but impossible to convert a variable frequency square 
to a fixed amplitude triangle (which you need, if the tri to sine is to 
work.). Unless you multiply by F, perhaps...

paul perry melbourne australia