Patent ID: 8676308

Claim:
A system for an electrical neurostimulator coupled to a plurality of electrodes, comprising: a processor configured for defining a target current source multipole relative to the plurality of electrodes, emulating the target multipole by defining an initial electrical current distribution for the electrodes, such that a first set of active electrodes respectively has electrical current values of a first polarity, and a second set of active electrodes respectively has electrical current values of a second polarity, comparing each of the electrical current values of the first polarity to a first threshold value, zeroing-out at least one of the electrodes in the first active electrode set based on the comparison, and redistributing the electrical current value of each of the at least one zeroed-out electrode in the first active electrode set to remaining ones of the electrodes in the first active electrode set to define a new electrical current distribution for the electrodes; and a controller configured for instructing the electrical neurostimulator to convey electrical current to the plurality of electrodes in accordance with the new electrical current distribution.