90-degree phase tri lfo revisited

[jorgen.bergfors at idg.se]

>> You can get arbitrary phase shifts by
>>starting with a saw oscillator, going through an ElectroNotes sawtooth
>>phase shifter, and then a saw to tri converter.
>...I dont know this ckt, I presume there is a comparator which says
>when to add or subtract the comparator input from the original
>sawtooth.. cant quite see how yet..

You can find the schematics for just such a circuit om my web site
http://www.idg.se/personal/bergfors/bergfotron/quadrature%20saw%20shaper.gif
I have built it, and it actually works.

/Jorgen