Em 05/05/2016 11:06, Neil escreveu:
> Hmmm... a summing amp in this configuration means I'll have to ground=20
> the unused input, effectively just becoming a voltage divider at the=20
> input... right?

Correct!

> I could possibly add the zener (or equiv clamp) on the input side.

Yes, but this time with a higher Vz, so it will interfere less with the
signal.

> Think I should go rummage through the op-amp bin.
>
> FWIW, the sensor does already have an amp, but it's not adjustable, so=20
> impedances should be good already.
>
> Cheers,
> -Neil.

Cheers,

Isaac

--=20
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