BJ's 4046 oscillator

[BJ]

> Well, in the normal saw-to-tri case you would extract such a spaced
> sawtooth that you then subtract with the saw (in a 1:2 mix) to get a
> triangle. Here you allready got the spaced saws, so it is only
> subtract these to each other.
> 
> Infact, the diff-voltage over the capacitor has a triangle shape, so
> setting up an op-amp as a diff-amp (using the existing buffer amps in
> BJs schematic) is a simple matter of a op-amp and a few resistors.
> 
> I even think that this might be a better solution than a normal
> saw-to-tri converter.
> 
> I will try it out, I have all the stuff around.
> 
> Cheers,
> Magnus

The new 4046 osc with PWM and ring mod at:(as usuall)
http://home8.swipnet.se/~w-88660/schpcb.htm

Besides that ,Magnus your triangle proposal will not work out!
The reason! study the shape and the phase of the "half" saw wave
and what happends when you try to invert it!! ;)

BJ
(! nosaer eht staht,rehto chae fo esahp fo tuo ged 09 era sevaw eht)