# US 10,320,448 B2 · Inductive structures with improved common mode transient immunity

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 10,320,448 B2
- Document ID: US10320448B2
- Status: Granted
- Kind: B2
- Application number: 15/850,572
- Filed: 2017-12-21
- Published: 2018-04-26
- Granted: 2019-06-11
- Earliest claimed: 2013-07-01
- Assignees: Texas Instruments Incorporated
- Applicants: Texas Instruments Incorporated
- Inventors: Rajaram Subramonian; Gianpaolo Lisi; Swaminathan Sankaran; Bradley Allen Kramer; Gerard Socci
- Web page: https://patentgrep.com/patent/US10320448B2

## CPC

- H04B 5/79: for data transfer in combination with power transfer
- H04B 5/263: {Multiple coils at either side}
- H04B: TRANSMISSION

## Abstract

In described examples, an inductive structure includes first and second inductive coils to conduct respective first and second common mode currents induced by a common mode transient between: a first ground coupled to a connection between the first and second inductive coils; and a galvanically isolated second ground.

## Claims

### Claim 1

An inductive structure, comprising:
first and second inductive coils forming an inductive data coil, the first and second inductive coils being arranged to conduct respective first and second common mode currents induced by a common mode transient between: a first ground coupled to a connection between the first and second inductive coils; and a galvanically isolated second ground; and
an inductive power coil around the inductive data coil.

### Claim 2 (depends on 1)

The inductive structure of claim 1, wherein the connection between the first and second inductive coils is a center tap.

### Claim 3 (depends on 1)

The inductive structure of claim 1, wherein the first inductive coil is arranged to conduct the first common mode current in a first direction, and the second inductive coil is arranged to conduct the second common mode current in a second direction.

### Claim 4 (depends on 3)

The inductive structure of claim 3, wherein the second direction is opposite the first direction.

### Claim 5 (depends on 1)

The inductive structure of claim 1, wherein the first and second inductive coils are reversed from one another.

### Claim 6 (depends on 1)

The inductive structure of claim 1, wherein the first and second inductive coils are identical to one another.

### Claim 7 (depends on 1)

The inductive structure of claim 1, wherein the first and second inductive coils are arranged to symmetrically conduct the respective first and second common mode currents.

### Claim 8 (depends on 1)

The inductive structure of claim 1, wherein the first and second common mode currents are capacitively induced by the common mode transient.

### Claim 9 (depends on 1)

The inductive structure of claim 1, wherein the first and second common mode currents are opposite in polarity.

### Claim 10 (depends on 1)

The inductive structure of claim 1, wherein the first and second common mode currents have a same magnitude.

### Claim 11 (depends on 1)

The inductive structure of claim 1, wherein the inductive data coil is arranged to output data by inductive coupling.

### Claim 12 (depends on 1)

The inductive structure of claim 1, wherein the inductive data coil is arranged to receive data by inductive coupling.

### Claim 13

An inductive structure, comprising:
first and second inductive coils forming an inductive data coil, the first and second inductive coils being arranged to conduct respective first and second common mode currents in opposite directions, the first and second common mode currents being capacitively induced by a common mode transient between: a first ground coupled to a connection between the first and second inductive coils; and a galvanically isolated second ground; and
an inductive power coil around the inductive data coil.

### Claim 14 (depends on 13)

The inductive structure of claim 13, wherein the connection between the first and second inductive coils is a center tap.

### Claim 15 (depends on 13)

The inductive structure of claim 13, wherein the first and second inductive coils are reversed from one another.

### Claim 16 (depends on 13)

The inductive structure of claim 13, wherein the first and second inductive coils are arranged to symmetrically conduct the respective first and second common mode currents.

### Claim 17 (depends on 13)

The inductive structure of claim 13, wherein the first and second common mode currents are opposite in polarity.

### Claim 18 (depends on 17)

The inductive structure of claim 17, wherein the first and second common mode currents have a same magnitude.

### Claim 19 (depends on 13)

The inductive structure of claim 13, wherein the inductive data coil is arranged to output data by inductive coupling.

### Claim 20 (depends on 13)

The inductive structure of claim 13, wherein the inductive data coil is arranged to receive data by inductive coupling.