[sdiy] Using Opamps as INV or NON-INV amplifiers

[Seb Francis]

If you want to sum multiple signals together you need to use inverting 
configuration.  That's quite often why you see an inverting followed by 
another re-inverting stage.

Seb


Dave Kendall wrote:
> Hi Guys.
>
> Apart from the gain being minimum of 1 for a non-inverting amp, are there
> any other advantages or gotchas about using one form or another? There's
> lots of stuff about op-amps out there, but I'm still a bit unsure about the
> practical differences in use. It would seem that a single NON INV amp is
> easier to implement, and yet often the INV configuration is used, with a
> second re-inverting stage ...
>
> Any thoughts welcome.
>
> cheers,
>
> Dave (still coming to terms with the impedance monster ;-)
>
>
>
>