Patent ID: 7064530
Filing Date: 2006-06-20
Classification: H02M

Abstract:
1. An apparatus comprising: a first switch; a first transformer comprising first primary winding and first secondary winding, the first primary winding coupled in series to the first switch; a second switch; a second transformer comprising second primary winding and second secondary winding, the second primary winding coupled in series to the second switch; a control unit coupled to the first switch and to the second switch, the control unit to control the first switch and the second switch to enter a first state in which the first switch is closed and the second switch is open, and to enter a second state in which the first switch is open and the second switch is closed; a first load coupled to an input node via the first switch in the first state and coupled to ground via the second switch in the second state, the first load to receive a first current; a circuit coupled to the first secondary winding and to the second secondary winding; and a second load coupled to the circuit, the second load to receive a second current substantially proportional to the first current.