Patent ID: 9515571
Filing Date: 2016-12-06
CPC Classification: H02M

Claim Text:
1. A current-rectifying device which permits a current to flow in one direction when driven by an AC input voltage, comprising: a switching component including a first node, a second node, a control-reference node and a high-impedance control node, wherein a conductance between the first node and the second node is controlled based on a voltage between the high-impedance control node and the control-reference node; and an impedance transformer including a positive input node, a negative input node, a positive output node and a negative output node, wherein the positive input node is electrically connected to one of the first node and the second node based on AC voltage swings thereof, and the positive output node is electrically connected to the high-impedance control node, such that the impedance transformer senses an AC voltage swing derived from the AC input voltage with the positive input node and the negative input node, and provides an AC voltage swing between the high-impedance control node and the control-reference node that is greater than the AC voltage swing derived from the AC input voltage, and an AC voltage swing between the first node and the second node is substantially in phase with the conductance therebetween to permit the current driven by the AC input voltage to flow in the direction from the first node to the second node.