# US 12,112,875 B2 · Integrated circuit

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- Number: US 12,112,875 B2
- Document ID: US12112875B2
- Status: Granted
- Kind: B2
- Application number: 17/236,215
- Filed: 2021-04-21
- Published: 2021-12-02
- Granted: 2024-10-08
- Earliest claimed: 2020-05-29
- Assignees: Realtek Semiconductor Corp.
- Applicants: Realtek Semiconductor Corporation
- Inventors: Hsiao-Tsung Yen; Ka-Un Chan
- Web page: https://patentgrep.com/patent/US12112875B2

## CPC

- H01F 27/006: {with special arrangement or spacing of turns of the winding(s), e.g. to produce desired self-resonance}
- H01F 17/0006: {Printed inductances (printed coils for dynamo-electric machines H02K3/26; printed circuits H05K)}
- H01F 27/2804: {Printed windings}
- H01F 27/29: Terminals; Tapping arrangements {for signal inductances}
- H10D 1/20: Inductors
- H01F 27/2819: {Planar transformers with printed windings, e.g. surrounded by two cores and to be mounted on printed circuit}
- H01F 2017/0073: {with a special conductive pattern, e.g. flat spiral}
- H01F: MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H10D: INORGANIC ELECTRIC SEMICONDUCTOR DEVICES

## Abstract

An integrated circuit includes a first coil and a second coil. The first coil is disposed on the first side of the integrated circuit. The second coil is disposed on the second side of the integrated circuit, and is partially overlapped with the first coil at a junction. The first coil is not interlaced with the second coil at the junction.

## Claims

### Claim 1

An integrated circuit, comprising:
a first coil disposed on a first side of the integrated circuit and comprising a first circle and a second circle; and
a second coil disposed on a second side of the integrated circuit, comprising a third circle and a fourth circle, and is partially overlapped with the first coil at a junction;
wherein the first coil is not interlaced with the second coil at the junction,
wherein the first circle and the third circle are located on a first metal layer, and the second circle and the fourth circle are located on a second metal layer,
wherein an end of a first portion of the second circle and an end of a first portion of the fourth circle form a first input and output terminal on the second metal layer, and an end of a second portion of the second circle and an end of a second portion of the fourth circle form a second input and output terminal on the second metal layer.

### Claim 2 (depends on 1)

The integrated circuit of claim 1, wherein part of the first coil is substantially in parallel with part of the second coil at the junction.

### Claim 3 (depends on 1)

The integrated circuit of claim 1, wherein the first coil comprises:
the first circle, comprising a first portion and a second portion; and
the second circle, comprising the first portion and the second portion;
wherein the first circle is partially overlapped with the second circle in a vertical direction, and the first portion of the first circle is coupled to the first portion of the second circle, and the second portion of the first circle is coupled to the second portion of the second circle.

### Claim 4 (depends on 3)

The integrated circuit of claim 3, wherein the first circle is disposed below the second circle or above the second circle.

### Claim 5 (depends on 3)

The integrated circuit of claim 3, wherein the first circle and the second circle are located on different metal layers.

### Claim 6 (depends on 3)

The integrated circuit of claim 3, wherein the second coil comprises:
the third circle, comprising a first portion and a second portion; and
the fourth circle, comprising the first portion and the second portion;
wherein the third circle is partially overlapped with the fourth circle in a vertical direction, and the first portion of the third circle is coupled to the first portion of the fourth circle, and the second portion of the third circle is coupled to the second portion of the fourth circle.

### Claim 7 (depends on 6)

The integrated circuit of claim 6, wherein the third circle is disposed below the fourth circle or above the fourth circle.

### Claim 8 (depends on 6)

The integrated circuit of claim 6, wherein the third circle and the fourth circle are located on different metal layers.

### Claim 9 (depends on 6)

The integrated circuit of claim 6, wherein the first circle and the third circle are located on a same metal layer.

### Claim 10 (depends on 6)

The integrated circuit of claim 6, wherein the second circle and the fourth circle are located on a same metal layer.

### Claim 11 (depends on 6)

The integrated circuit of claim 6, wherein the first portion of the first circle is coupled to the first portion of the third circle at one side of the first coil same as the junction, and the second portion of the first circle is coupled to the second portion of the third circle at one side of the first coil same as the junction.

### Claim 12 (depends on 6)

The integrated circuit of claim 6, wherein the first portion of the second circle is coupled to the first portion of the fourth circle at one side of the first coil same as the junction, and the second portion of the second circle is coupled to the second portion of the fourth circle at one side of the second coil same as the junction.

### Claim 13 (depends on 1)

The integrated circuit of claim 1, wherein the first input and output terminal is disposed on one side opposite to the junction in the first coil.

### Claim 14 (depends on 1)

The integrated circuit of claim 1, wherein the second input and output terminal is disposed on one side opposite to the junction in the second coil.

### Claim 15 (depends on 6)

The integrated circuit of claim 6, further comprising:
a first center-tapped terminal disposed on one side opposite to the junction in the first coil.

### Claim 16 (depends on 15)

The integrated circuit of claim 15, wherein the first center-tapped terminal and the first circle are located on a same metal layer.

### Claim 17 (depends on 16)

The integrated circuit of claim 16, further comprising:
a second center-tapped terminal disposed on one side opposite to the junction in the second coil.

### Claim 18 (depends on 17)

The integrated circuit of claim 17, wherein the second center-tapped terminal and the third circle are located on a same metal layer.