one/F noise source ckt?

[Jeff Foster - SDA Unix]

Thomas Hudson wrote:
> 
> There have been some good discussions of 1/f
> noise on the music dsp list. Unfortunately,
> other types of noise made me unsub from that list.
> There are some good links in this message:
> 
> http://shoko.calarts.edu/~majordom/music-dsp/1998b/msg00119.html
> 
> I also have some code lying around based on an
> old Marvin Gardner/Scientific American article
> for generating 1/f random numbers.
> 
> I've never seen any way to generate it electronically,
> which seems strange considering the first link
> in the above message would lead me to believe
> it is everywhere :-)

The Serge manaul ( Gold book) says the noise from the noise source is
1/f.


JEff


> 
> Tomy
> 
> Paul Perry wrote:
> >
> > I'm looking for a source of 1/f (AKA flicker noise)
> > noise generator, or something resembling it.
> > Thins 1/f noise is so-called, because the amplitude is
> > inversely proportional to frequency.
> > And, is connected with fractal geometry, in the sense that
> > a plot of this noise is self-similar in the same way.
> >
> > I want a generator over the usual LFO ranges, .01 Hz to audio say.
> > Does anyone know a reliable generator? Or a simple algorithm?
> > Or, what I would particularly like, a filtering strategy to
> > convert white noise into it? (note that I'd need a white noise source
> > that went near as dammit to DC)
> >
> > I know a lot of you guys know more maths than i do!
> > and, I only need an approximation..
> >
> > paul perry melbourne australia

-- 

Jeff Foster
SDA UNIX 510-642-8552
261 Evan Hall, UC Berkeley
Berkeley, CA 94720