Force sensing systems

A compensation circuit 420 at least partially cancels the offset voltage in an output signal of a force sensor 410. The compensation circuit 420 comprises a voltage divider 422 which receives a bias voltage Vbias that has also been supplied to force sensor 410. The voltage divider outputs a control voltage Vcont, derived from Vbias, and the component mismatch ratio of the voltage divider circuitry is adjustable to correspond to a component mismatch ratio of the force sensor. A current generator 424 receives Vcont and generates a compensation current Icomp. Amplifier circuitry 426 receives the differential signal output by the force sensor and Icomp and outputs a compensated differential output signal in which the offset voltage is at least partially reduced. The voltage divider may have an adjustable ratio of Vcont to Vbias corresponding to a ratio of a quiescent different output voltage of the force sensor to Vbias. A ratio of resistances of the voltage divider circuitry may be adjustable to correspond to a ratio of resistances of the force sensors. Also provided are a force sensor circuit and force sensor system corresponding to the disclosed compensation circuit.