SV: Re: [sdiy] Re: Saw phase shifter was: English lessons

[karl dalen]

We are back to the discussion here when Harry had hopes
for audio FM if sweping, i said no becuse we need a 
phase change of several tousands degrees of phase change.

This is interesting becuse it directly relates to 
what Magnus said about bessel functions regarding 
to the difference between true zero FM and delayline PM.

The phase saw suffer from severe bessel functionality! :P

I wich there was a very simple solution to do the
same thing with triangle (ota) based core instead!

KD


--- Harry Bissell Jr <harrybissell at prodigy.net> skrev:

> MORE importantly... (what are you saying ?)
> 
> The phase voltage 'is' sweepable isn't it ?
> If you mean that changing the voltage changes the
> relative phase shift of the sawtooth.
> 
> The neat thing would be to be able to sweep over
> multiple cycles.
> 
> I'm using sawtooth phase shift now.  It sounds good,
> but if you compare it with the input sawtooth its
> boring. The sound would be more like a simple PWM
> wave.
> 
> So what do you mean ???
> 
> H^) harry
> 
> --- mark verbos <mverbos at earthlink.net> wrote:
> 
> > more importantly, how do you make the phase voltage
> > sweepable? You need 
> > to put the Buchla harmonic generator in Mills
> > College to shame.
> > 
> > Mark
> > 
> > 
> > 
> > Magnus Danielson wrote:
> > 
> > >
> > >OK, now to get you back on track... remember my
> > sawtooth phase-shifter? What do
> > >you guys think needs to be done to make it
> > workable? Should a good op-amp be
> > >enought maybe?
> > >
> > >Cheers,
> > >Magnus
> > >
> > >  
> > >
> > 
> 
>