Hello Chris;

Are you able to provide us with
a mag/coil design with three wires
specifically designed to work
with a differential amplifier.
This would mean a center tapped coil
with two wire each one going
to + and - and the third wire
going to neutral ground ?

( balanced input ? )

I am only interested in the
sensor and not the associated
electronics.

The only way I know is two identical
coils joined in an additive way
putting the join point at ground.

But, I understand there is an
impedance difference between
plus and minus inputs
into the op amp and this
may be needed to be considered
in the design of the sensor itself ?

I think of your design which
uses several small magnets and
a rectangular coil.

Some three wire version of that
for a vertical sensor.

Thanks,
geoff

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