An apparatus for generating a sensor signal indicating information on a capacitance of a variable capacitor including a variable capacitance includes a sensor unit and a compensation unit. The sensor unit is configured to generate a sensor signal indicating information on a varying current flowing through a connection between the sensor unit and the variable capacitor caused by a variation of the capacitance of the variable capacitor while the variable capacitor is biased by a predefined bias voltage. Further, the compensation unit is configured to influence the sensor signal or to provide a compensation signal capable of influencing the sensor signal so that the sensor signal includes less nonlinear signal portions than a sensor signal without the influence of the compensation unit or the compensation signal.