I've read that an inverting opamp could help make the FSR's non-linear output more linear.
Sounds nonsensical to me. Or maybe the idea is using a constant current source circuit to convert
resistance to voltage linearly? In general do this sort of thing in software, just get the raw data in
and post-process - less hardware, fewer components.
I doubt the sensor itself has a linear relation between force and resistance (or conductance)
in the first place.