AVR-Chat

hi all,

if I correctly remember, to known the global error from the individual errors
is somehow like computing the derivative of a function.

where A and B are transfert functions with dA and dB their respective error.

d(A+B) = dA + dB
d(A-B) = dA + dB (always the worst case)
d(A.B) = B.dA + A.dB
d(A/B) = (B.dA + A.dB) / (A.B)

these are the basic relations, just fancy how it quickly becomes quite heavy!!!

regards
   Yann

--- Johnathan Corgan <jcorgan@aeinet.com> a écrit :

> Micah Stevens wrote:
> 
> > If you have 10, 100 ohm resistors in series, and each is 1% tolarance, the 
> > tolarance of the total group is +- 10%.. That is indeed correct, and if
> each 
> > is +-10%, then the total tolerance is +-100%.. odd as it may sound. 
> 
> Uh, no.
> 
> Ten, 100 ohm, 10% tolerance resistors in series add to 1000 ohms.
> 
> If they are all at the maximum of their range, 110 ohms, then their sum
> is 1100 ohms, still +10% of 1000 ohms.
> 
> Likewise, at the minimum of their range, 90 ohms, then their sum is 900
> ohms, or -10% of 1000 ohms.
> 
> Same for 1% resistors.  Same for parallel connection vs. series connection.
> 
> -Johnathan
> 
> 
> 
> 
>  
> Yahoo! Groups Links
> 
> 
> 
>  
> 
> 
> 



	

	
		
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