Bi-pulse convertor (ON-topic)

[UrosM]

> > Sounds like PWM but distinctly different. Should also work with a triangle
> > input. Obviously this is a simple quantization problem, which has been
> > discussed before. Anyone have a schematic?
> 
> Nope, but let's make one... this is done by using three op-amps and
> four resistors...

Hi people ,
actually there is schematic for ckt that performs described function
it was published in Elektor in december 1996. by H. Bonekamp
it is floating around net because I have html document that describe ckt
( with schematic + graphic example with triangle wave ) 
it uses two pots , but to generate comparator voltage thresholds so
adding CV control is no problem .
Unfortunately , I got that html from friends cdrom so I have no idea
where is that paper on web . Ckt is named " Harmonics generator " so
you could try your luck on google .
If someone really want it quickly I could send it via email
cheerz
urosh