The only thing that should concern you regarding strain would be that if
you drop your gain too low then the amp will no longer be stable as it's
receiving positive feeback instead of negative feedback and as a result
the amp will receive too much positive feedback (goes to infinity) and
you will eventually have a situation where it is being pushed too hard
and will fail.

This can be ovserved in the bode plots for the gain of the amp.  It has
to do with the gain and the phase at which it occurs.  You would be wise
to construct a simple bode of the magnitude and phase and look at
whether or not the gain comes back to less than one before it hits 180*.
  If not, then you will at least know what minimum gain is required for
stable operation.

-Shawn



Luis Moreira wrote:

> exactly my question.
>
> -----Original Message-----
> From: David VanHorn [mailto:dvanhorn@CEDAR.NET]
> Sent: 11 June 2004 15:34
> To: PICLIST@mitvma.mit.edu
> Subject: Re: [EE] OPAMP use
>
>
>
>>I read a few things about it and it seems that the non inverting
>>configuration puts more strain on the OPAMP...
>
>
> Strain?  In what way?
>
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