Apparatus, system and method for magnetic field sensing

Apparatus comprising at least one processor configured to:

• receive a plurality of signals from each of a respective one of a plurality of magnetic field sensors in an array of sensors located in proximity to a magnet mounted on an object, wherein each sensor in the may has a fixed position with respect to other sensors in the array and each of the plurality of signals represents a magnetic field value at the respective sensor;
• process the plurality of signals to provide a plurality of respective corrected signals including a correction for an ambient magnetic field component and for non-ideal characteristics of the sensors;
• and
• process the plurality of corrected signals to determine a parameter associated with an input from a user.

A system comprising:

• a magnet configured for mounting on an object;
• a plurality of magnetic field sensors forming an array of sensors located in proximity to the magnet, wherein each sensor in the array has a fixed position with respect to other sensors in the array and each sensor produces a signal representing a magnetic field value at the sensor;
• and
• a processor processing the plurality of signals produced by the array of sensors to provide a respective plurality of corrected signals including a correction for an ambient magnetic field component and for a non-ideal characteristic of the sensors, and processing the plurality of corrected signals to determine a parameter associated with an input from a user.