Patent ID: 8624436

Claim:
An apparatus including current balancing circuitry, comprising: first, second and third electrodes for coupling to first and second serially coupled DC power sources to receive via said first and third electrodes, a sum of first and second DC voltages produced by said first and second DC power sources, respectively, and a common DC current produced by said first and second DC power sources, and via said second electrode, a difference DC current substantially equal to a difference between first and second DC currents produced by said first and second DC power sources, respectively; capacitive circuitry coupled to said first, second and third electrodes; switching circuitry coupled between said first and third electrodes; inductive circuitry coupled between said second electrode and said switching circuitry; and control circuitry coupled to said first, second and third electrodes and said switching circuitry, wherein said control circuitry is responsive to measured values of said first and second DC voltages and measured values of said first and second DC currents by providing a plurality of control signals, and said switching circuitry is responsive to said plurality of control signals by providing a first DC current path between said inductive circuitry and said first electrode during a first time interval, and a second DC current path between said inductive circuitry and said third electrode during a second time interval.