An embodiment apparatus comprises a magnetic core comprising a first side and a second side opposite the first side, a first winding comprising a first portion wound around the first side and a second portion wound around the second side, a second winding comprising a third portion wound around the
An embodiment apparatus comprises a magnetic core comprising a first side and a second side opposite the first side, a first winding comprising a first portion wound around the first side and a second portion wound around the second side, a second winding comprising a third portion wound around the first side and a fourth portion wound around the second side, wherein the second portion and the fourth portion are coupled to each other.
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1. An apparatus comprising: a magnetic core comprising a first side and a second side opposite the first side;a first winding comprising: a first portion wound around the first side; anda second portion wound around the second side, wherein the first winding is configured to flow a first current fro
1. An apparatus comprising: a magnetic core comprising a first side and a second side opposite the first side;a first winding comprising: a first portion wound around the first side; anda second portion wound around the second side, wherein the first winding is configured to flow a first current from the first portion of the first winding to the second portion of the first winding;a second winding comprising: a third portion wound around the first side; anda fourth portion wound around the second side, wherein the second portion and the fourth portion are coupled to each other, wherein the second winding is configured to flow a second current from the third portion of the second winding to the fourth portion of the second winding, and wherein: the first portion and the third portion are wound around the first side in a same direction; andthe second portion and the fourth portion are wound around the second side in a same direction, and wherein the first portion, the second portion, the third portion and the fourth portion are formed by a single winding wire, and wherein a bottom surface of a bottommost turn of the first portion is level with a bottom surface of a bottommost turn of the second portion, and a bottom surface of a bottommost turn of the third portion is level with a bottom surface of a bottommost turn of the fourth portion, and wherein the bottommost turn of the second portion and the bottommost turn of the first portion are connected by a first curved connection element, and the bottommost turn of the fourth portion and the bottommost turn of the third portion are connected by a second curved connection element, and wherein the first curved connection element and the second curved connection element are parallel to each other, and wherein a first terminal of the single winding wire and an uppermost turn of the first portion are connected by a third curved connection element, and a second terminal of the single winding wire and an uppermost turn of the third portion are connected by a fourth curved connection element, and wherein the third curved connection element and the fourth curved connection element are parallel to each other. 2. The apparatus of claim 1, wherein: the magnetic core is a rectangular magnetic core. 3. The apparatus of claim 1, wherein: a first terminal of the first winding and a first terminal of the second winding are two input terminals of a coupled inductor; anda second terminal of the first winding and a second terminal of the second winding are coupled together to form an output terminal of the coupled inductor. 4. The apparatus of claim 1, wherein: the first winding spirally wraps around the first side, extends from the first side to the second side and spirally wraps around the second side; andthe second winding spirally wraps around the first side, extends from the first side to the second side and spirally wraps around the second side. 5. The apparatus of claim 1, wherein: the magnetic core is formed of ferrite. 6. The apparatus of claim 1, wherein: the first winding and the second winding are implemented by using the single winding wire, and wherein the single winding wire is rectangular in shape from a cross sectional view. 7. The apparatus of claim 1, wherein the single winding wire is configured to: wrap a plurality of first turns around a first end of the first side of the magnetic core;extend from the first end of the first side of the magnetic core to a first end of the second side of the magnetic core through the first curved connection element;wrap a plurality of third turns around the first end of the second side of the magnetic core;extend from the first end of the second side of the magnetic core to a second end of the second side of the magnetic core;wrap a plurality of fourth turns around the second end of the second side of the magnetic core;extend from the second end of the second side of the magnetic core to a second end of the first side of the magnetic core through the second curved connection element; andwrap a plurality of second turns around the second end of the first side of the magnetic core. 8. The apparatus of claim 7, wherein: the first terminal is orthogonal to the third curved connection element; andthe second terminal is orthogonal to the fourth curved connection element. 9. The apparatus of claim 8, further comprising: a third terminal connected to a common node of the plurality of third turns and the plurality of fourth turns. 10. The apparatus of claim 8, wherein: the first terminal, the second terminal and third terminal are parallel to each other. 11. The apparatus of claim 8, wherein: the first terminal, the second terminal and third terminal are on the same side with reference to the plurality of first turns, the plurality of second turns, the plurality of third turns and the plurality of fourth turns.
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