Patent ID: 7468899

Claim:
An apparatus, comprising: an integrated circuit die, the integrated circuit die having fabricated thereon: a plurality of regulator circuits, each of the regulator circuits having an input node configured to receive a plurality of pulsed input signals having a predetermined duty cycle; a multiplicity of inductor core windings, each regulator circuit being associated with a corresponding set of one or more inductor core windings; an inductor core array including a plurality of inductor core elements, each inductor core element being positioned adjacent to and magnetically coupled with an associated plurality of the multiplicity of inductor core windings, each core element comprising a first core member positioned adjacent to a first surface of the associated plurality of inductor core windings and a second core member positioned adjacent to a second surface of the associated plurality of inductor core windings, the first and second core members substantially forming a loop around the associated plurality of inductor core windings; an output node electrically coupled to the multiplicity of inductor core windings, the output node configured to provide an output signal that is the sum of the instantaneous voltage on each of the inductor windings associated with the plurality of regulator circuits respectively; and a phase control circuit coupled to the plurality of regulator circuits, the phase control circuit being configured to control the phase of the plurality of pulsed input signals applied to the input nodes of the plurality of regulator circuits respectively such that the phase of the voltage applied to the set of one or more inductor windings associated with each regular circuit is out of phase with respect to the voltages applied to the other sets of one or more inductor core windings associated with the other regulator circuits, thereby substantially destructively interfering and canceling out ripple and generating a substantially steady output signal at the output node.