# US 12,002,618 B2 · Transformer > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,002,618 B2 - Document ID: US12002618B2 - Status: Granted - Kind: B2 - Application number: 16/901,281 - Filed: 2020-06-15 - Published: 2020-10-01 - Granted: 2024-06-04 - Earliest claimed: 2017-12-27 - Assignees: Huawei Technologies Co., Ltd. - Applicants: Huawei Technologies Co., Ltd. - Inventors: Kai Shi; Lei Lu - Web page: https://patentgrep.com/patent/US12002618B2 ## CPC - H01F 27/2804: {Printed windings} - H01F 30/06: characterised by the structure - H01F 19/04: Transformers or mutual inductances suitable for handling frequencies considerably beyond the audio range (resonant circuits H03H) - H01F 27/06: Mounting, supporting, or suspending transformers, reactors, or choke coils {not being of the signal type} - H01F 27/28: Coils; Windings; Conductive connections - H01F 27/2809: {on stacked layers} - H01F 27/346: {Preventing or reducing leakage fields (using magnetic shields H01F27/36; using auxiliary windings H01F27/38)} - H01F 27/38: Auxiliary core members; Auxiliary coils or windings - H01F 27/40: Structural association with built-in electric component, e.g. fuse - H10W 20/497: {Inductive arrangements or effects of, or between, wiring layers} - H10W 44/20: at high-frequency [HF] or radio frequency [RF] - H10W 44/501: {Inductive arrangements (H10W44/20 takes precedence)} - H10W 44/234: {Arrangements for impedance matching} - H01F: MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES - H10W: GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10 ## Abstract A transformer, including a first coil and a second coil. The first coil is magnetically coupled to the second coil. At least one of the first coil and the second coil includes a plurality of sub-coils, and the plurality of sub-coils include a first sub-coil and a second sub-coil. A first magnetic field formed by the first sub-coil passes through a layout plane of the transformer in a first manner, and a second magnetic field formed by the second sub-coil passes through the layout plane in a second manner. The first manner includes passing in from a first surface of the layout plane and passing out from a second surface of the layout plane, and the second manner includes passing in from the second surface and passing out from the first surface. ## Claims ### Claim 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. ### Claim 2 (depends on 1) The transformer according to claim 1, wherein the first sub-coil is coupled to the second sub-coil by M first cross structures, and the first projection of the first area on the plane does not overlap the second projection of the second area on the plane, wherein M is an odd number greater than 0. ### Claim 3 (depends on 2) The transformer according to claim 2, wherein a first plane formed by the first area and a second plane formed by the second area are a same plane or parallel to each other. ### Claim 4 (depends on 3) The transformer according to claim 3, wherein the second plane is substantially parallel to the plane of the transformer. ### Claim 5 (depends on 1) The transformer according to claim 1, wherein the first sub-coil is coupled to the second sub-coil by N second cross structures, and the first projection of the first area on the plane overlaps the second projection of the second area on the plane, wherein N is an even number greater than 0. ### Claim 6 (depends on 1) The transformer according to claim 1, wherein: the first port and the second port point to a first port direction from a perspective perpendicular to the plane, and the third port and the fourth port point to a second port direction from the perspective perpendicular to the plane, and the first port direction is different from the second port direction. ### Claim 7 (depends on 1) The transformer according to claim 1, wherein the second coil and the first coil have different shapes. ### Claim 8 (depends on 1) The transformer according to claim 1, wherein the plurality of sub-coils in the first coil surround a fifth area, the second coil surrounds a sixth area, and a fifth projection of the fifth area on the plane at least partially overlaps a sixth projection of the sixth area on the plane. ### Claim 9 (depends on 1) The transformer according to claim 1, wherein the transformer is located on a semiconductor chip, and the first coil or the second coil is disposed on one or more layers of the semiconductor chip. ### Claim 10 A circuit system, comprising: a transformer, wherein the transformer comprises: a first coil; and a second coil; wherein the first coil is magnetically coupled to the second coil; wherein 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 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; wherein 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; wherein 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. ### Claim 11 (depends on 10) The circuit system according to claim 10, wherein the circuit system further comprises an oscillator system. ### Claim 12 (depends on 10) The circuit system according to claim 10, wherein the first sub-coil is coupled to the second sub-coil by M first cross structures, and the first projection of the first area on the plane does not overlap the second projection of the second area on the plane, wherein M is an odd number greater than 0. ### Claim 13 (depends on 10) The circuit system according to claim 10, wherein: the first port and the second port point to a first port direction from a perspective perpendicular to the plane, the third port and the fourth port point to a second port direction from the perspective perpendicular to the plane, and the first port direction is different from the second port direction. ### Claim 14 (depends on 10) The circuit system according to claim 10, wherein the third direction is a same direction as the second direction. ### Claim 15 (depends on 10) The circuit system according to claim 10, wherein the plurality of sub-coils in the first coil surround a fifth area, the second coil surrounds a sixth area, and a fifth projection of the fifth area on the plane at least partially overlaps a sixth projection of the sixth area on the plane. ### Claim 16 (depends on 10) The circuit system according to claim 10, wherein the second coil and the first coil have different shapes. ### Claim 17 (depends on 12) The circuit system according to claim 12, wherein a first plane formed by the first area and a second plane formed by the second area are a same plane or parallel to each other. ### Claim 18 (depends on 17) The circuit system according to claim 17, wherein the second plane is substantially parallel to the plane of the transformer.