[sdiy] really basic question .. tolerance

[harrybissell]

Tell ya what John...

I'll buy your arguement that it can't be worse than the original tolerance...

if you buy mine that its likely to be BETTER than the original tolerance...

H^) harry

John L Marshall wrote:

> Tim or Harry or Peter,
>
> Please show me an example of two 1% resistors in series or parallel where
> the tolerance exceeds 1%. I heard this rule many times but I can't see it.
>
> Complex circuits are another story. I can see how errors accumulate through
> gain stages.
>
> I need empirical evidence to be convinced.
>
> Take care,
> John
> www.sound-photo.com
> ---------------------------------------------------------------------------
>
> ----- Original Message -----
> From: "Tim Ressel" <madhun2001 at yahoo.com>
> To: "diysynth" <diy_list at analog-synth.de>; <synth-diy at dropmix.xs4all.nl>
> Sent: Saturday, January 18, 2003 1:32 PM
> Subject: Re: [sdiy] really basic question .. tolerance
>
> > Joerg,
> >
> > That is an optimistic way of looking at it. However
> > the worse-case is still the sum. If I'm worrying about
> > tolerances, I always look at worse-case.
> >
> > --tim
> >
> >
> >
> > --- diysynth <diy_list at analog-synth.de> wrote:
> > > Hi all
> > >
> > > > tolerance are connected in series that the result
> > > will be out of
> > > tolerance?
> > > >
> > > > Add two 100k resistors 101k + 101k = 202k still 1%
> > >
> > > Sure ? I allways thought, the resulting tolerance
> > > gets better with the
> > > factor t_res=t_single/sqrt(n), where n is the number
> > > of used resistors, and
> > > t_single is the tolerance of the single resistor ?
> > >
> > > Joerg
> > >
> > >
> >
> >
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