SV: Re: SV: Re: [sdiy] Expo converters, lin log etc.

[Magnus Danielson]

From: Ian Fritz <ijfritz at comcast.net>
Subject: Re: SV: Re: SV: Re: [sdiy] Expo converters, lin log etc.
Date: Thu, 01 Feb 2007 05:50:31 -0700
Message-ID: <6.2.1.2.2.20070201054901.0210e008 at mail.comcast.net>

> At 09:01 PM 1/31/2007, Dave Manley wrote:
> >Karl Ekdahl wrote:
> >>I've got some numbers of V->Hz that does not tell me
> >>anything really:
> >>
> >>Hz      V
> >>342     0
> >>365     1
> >>396     2
> >>451     3
> >>533     4
> >>650     5
> >>834     6
> >>1182    7
> >Normalize the data by subtracting 342 from all. You get this series:
> >
> >0, 23, 54, 109, 191, 308, 492, 840 which is approximately:
> >
> >0, 25, 50, 100, 200, 400, 800, 1600, with increasing error.
> >
> >So... the series is roughly exponential:
> 
> But why would you have a constant offset in an exponential 
> response?  Doesn't make sense. 

For whatever it matters, I agree! It just doesn't make much sense!

This system does seem to be very linear or exponential at all. 365/342 is
not near 1182/834, neither is 365-342 anywhere near 1182-834. Thus, it fails to
be either exponential or linear.

MVH
Magnus