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From: Richard Holmes on 11 Mar 2010 15:24
On Thu, 11 Mar 2010 14:49:16 +0100, Uwe Hercksen
<hercksen(a)mew.uni-erlangen.de> wrote:

>
>using bipolar input signals with a single supply op amp is not a good
>idea, especially if you want bipolar output signals too.
>

How about DC offsetting the input signals?

Richard Holmes
From: Phil Allison on 12 Mar 2010 06:50

"Richard Holmes"

> How about DC offsetting the input signals?


** You will have to offset them in the negative direction.

Do read what has been posted.



...... Phil





From: George Herold on 12 Mar 2010 11:41
On Mar 12, 6:50 am, "Phil Allison" <phi...(a)tpg.com.au> wrote:
> "Richard Holmes"
>
> > How about DC offsetting the input signals?
>
> ** You will have to offset them in the negative direction.
>
>    Do read what has been posted.
>
> .....  Phil

Hmm, probably a silly idea with a mistake. But if you could reference
the signals to some voltage half way between the supply voltages (call
it common). You could then use the summing op-amp circuit. Then
invert back about the common point and remove the DC offset at the
end... sounds like a lot of trouble just to add two voltages with
single supply opamp.

George H.
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