Bode Barber Pole Phaser

[WeAreAs1 at aol.com]

The way you make a barber pole phaser is to use the four outputs of a 
quadrature sawtooth LFO to modulate four separate phase shifters.  That's the 
simple answer.  Unfortunately, I'm just stepping out the door right now, and 
I don't have time to add any details.  Maybe someone else could fill in, or 
point to some useful quadrature oscillator schematics?

Michael Bacich