Patent ID: 8481873

Claim:
A capacitive touch sensor comprising: a controller adapted to perform a first charging process by supplying an electrode with a first charging current for a first charging interval, wherein the first charging current and the first charging interval are pre-defined, and the first charging process is complete at an end of the first charging interval, to determine, based on at least one of a plurality of digital values, whether a first electrode voltage value measured upon completion of the first charging process meets a criteria, and when the first electrode voltage value does not meet the criteria, to perform a configuration process that results in setting a second charging current and a second charging interval for the electrode to be used as different pre-defined values during a subsequently-performed, second charging process, wherein supplying the electrode with the second charging current for the second charging interval during the second charging process results in a second electrode voltage value measured upon completion of the second charging process that is more likely to meet the criteria.