Patent ID: 8054001

Claim:
A circuit comprising: a power source; a transformer coupled to said power source; a plurality of loads, including a first through an N th load wherein N is an even integer and at least 4, said plurality of loads having a high voltage side and a low voltage side, and wherein said transformer is coupled with said high voltage side of said plurality of loads, wherein said loads are arranged as a plurality of series-coupled load pairs, and wherein a plurality of load currents are generated to flow through said series-coupled load pairs; a current balance circuit having at least one balance choke including a first winding and a second winding, wherein said first winding of said at least one balance choke is coupled in series with said low voltage side of said first load and said low voltage side of a second load of said series-coupled load pairs, and said second winding of said at least one balance choke is coupled in series with said low voltage sides of an N−1 th load and said N th load of said series-coupled load pairs, said current balance circuit useful for balancing said load currents; and a current sense circuit coupled between said low voltage side of a load of said series-coupled load pair and said at least one balance choke, and operable for generating a feedback signal indicative of a corresponding load current flowing through said series-coupled load pair.