one/F noise source ckt?

[patchell]

    I found what you need in one of my Active Filter books.  To get a "true" -3db
per octave rolloff, you need to use a resistor with ditributed capacitance.  If
you were to model this with lumped components it would be equivilent to an
infinate number of resistors in series with an infinate number of shunt
capacitors.  The only draw back to this is I somehow don't think you are going to
find anybody selling such a component.

Magnus Danielson wrote:

> From: Kirke Sonnichsen <kirke at lmi.net>
> Subject: Re: one/F noise source ckt?
> Date: Thu, 3 Aug 2000 06:54:37 -0700
>
> > Didn't Bob Moog have some clever way of making a -3dB filter
> > for the pink noise source in the MiniMoog?
> >
> > I seem to remeber reading something about that but, it was
> > such a long time ago...
>
> Well, I just checked the MiniMoog Service Manual and it is not something very
> clever, he just filters it. It is a fairly simple filter. It falls into one of
> those "good enougth" approximations.
>
> The ASM-1 noise source has equalent complexity and similar design.
>
> Cheers,
> Magnus

--
 -Jim
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