| CPC H01F 30/06 (2013.01) [H01F 27/06 (2013.01); H01F 27/28 (2013.01); H01F 27/40 (2013.01); H01L 23/645 (2013.01)] | 18 Claims |
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1. A transformer, comprising:
a first coil; and
a second coil, wherein:
the first coil is magnetically coupled to the second coil;
the first coil comprises a plurality of sub-coils, the plurality of sub-coils comprise a first sub-coil and a second sub-coil, a first magnetic field formed by the first sub-coil passes through a plane of the transformer in a first manner, a second magnetic field formed by the second sub-coil passes through the plane of the transformer in a second manner, the first manner comprises passing through the plane in a first direction, the second manner comprises passing through the plane in a second direction, and the second direction is opposite from the first direction;
the first sub-coil comprises a first port of the first coil and a second port of the first coil, and the second coil comprises a third port and a fourth port;
the first port, the second port, the third port, and the fourth port are on a same side of a line separating the first sub-coil and the second sub-coil; and
a third magnetic field formed by the second coil passes through the plane of the transformer in a third manner, the third manner comprises passing through the plane in a third direction, and the third direction is opposite from the first direction,
wherein the first sub-coil surrounds a first area, wherein the second sub-coil surrounds a second area, wherein the second coil surrounds a third area, wherein a third projection of the third area on the plane at least partially overlaps a first projection of the first area on the plane,
wherein the first port, the second port, the third port, and the fourth port are on a same side of a second line dividing the first sub-coil into a first portion and a second portion and dividing the second coil into a third portion and a fourth portion, the first portion including the first port and the second port, the third portion including the third port and the fourth port, the second line passing through a center of the first area and parallel to the line,
wherein the second coil is a single coil without any sub-coil forming an additional magnetic field in a manner different from the third manner, and
wherein the third projection of the third area on the plane does not overlap a second projection of the second area on the plane.
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