Patent ID: 8669809

Claim:
A circuit comprising: a first input terminal for receiving a first pulsed signal; a second input terminal for receiving a second pulsed signal that is out of phase with the first pulsed signal; a load; and an LC filter comprising a coupled inductor that comprises a first winding and a second winding that are at least partially magnetically coupled to each other in a manner that both couples the first pulsed signal and the second pulsed signal and presents differential inductance to the first pulsed signal and the second pulsed signal; wherein the coupling of the first pulsed and the second pulsed signal operates to combine the first pulsed signal and the second pulsed signal into one signal at substantially twice the frequency and with less ripple than either the first pulsed signal and the second pulsed signal have separately; and wherein the differential inductance serves as an element in an RC filter to further reduce ripple in an output voltage.