AK wrote:
> Hi group.  I'm designing an amplifier that should have a high common
> mode rejection ratio, and resistor dividers are required on the
> inputs.  I'm trying to avoid a manual trimming step.  Is there a
> common error trend of the resistors in a chip resistor array such that
> the resistance error between elements is commonly less than the
> overall resistance tolerance?
> thanks
>  -AK
>   
yes. That's true. Differential error is a lot less than absolute error. 
It's inherent in manufacturing process.
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