Also, in practice you'll be very lucky to find a resistor sold as 5% that is
within 1% across temperature etc. - they're the ones that are being sold as
1% parts!

Regards,

Andy Gulliver

> -----Original Message-----
> From: Gary Packman [mailto:[EMAIL PROTECTED]]
> Sent: 02 July 2002 10:08
> To: Protel EDA Forum
> Subject: Re: [PEDA] AW: SPICE sim question
>
>
> Georg,
> I'm not sure I understand your question.  What I think you are asking is
> how to predict the ratio of resistors that will make your bridge stay
> within certain design parameters versus those that will not based upon a
> random sample batch of parts.  If this is what you're asking my advice
> is to always purchase components that are within the limits of the
> design, even if they cost more.  Why? Because if you buy 100,000 5%
> resistors with the expectation that a certain per cent will fall within
> a 1% tolerance you might end up with 100,000 parts that won't work.
> Plus, the cost of tolerance testing is generally prohibitive (unless you
> live in China).
>
> Also, cheap components often drift with age.  The more expensive high
> tolerance parts don't drift as badly.
>
> If I misunderstood let me know and I'll take another stab at it.
>
[cut]


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