Patent ID: 7755463

Claim:
An apparatus comprising: an integrated circuit die; and an inductor formed on the integrated circuit die, the inductor comprising: a plurality of inductor windings each having a winding input and a winding output, the winding inputs of the plurality of inductor windings arranged to receive complementary pulsed input signals with an alternating current component; an inductor core array having a first set of at least one inductor core element and a second set of at least one inductor core element, each inductor core element of the first and second sets of inductor core elements being magnetically coupled with, adjacent to and overlying at least one of the inductor windings, at least one of the first set of inductor core elements being magnetically coupled with, adjacent to and overlying at least two of the inductor windings, wherein each inductor core element in the first set of inductor core elements is formed from a first metallic material and each inductor core element in the second set of inductor core elements is formed from a second metallic material that has a different magnetic coercivity than the first metallic material; a set of spacers that help electrically isolate the inductor core elements; and an output node electrically connected to the winding outputs, the output node being arranged to provide an output signal that is the sum of the instantaneous voltage at the winding outputs.