Inductive structures with reduced emissions and interference
In described examples, an inductive structure includes a power coil and a data coil. The data coil is substantially centered within the power coil. A first portion of the data coil is for conducting current in a first direction. A second portion of the data coil is for conducting current in a second direction opposite the first direction. The first portion of the data coil is connected at a ground node to the second portion of the data coil. The power coil is for: receiving power without data; and outputting the received power without data.
1. A device, comprising:
an inductive structure including a power coil and a data coil, wherein: the data coil is substantially centered within the power coil; a first portion of the data coil is structured to conduct current in a first direction; a second portion of the data coil is structured to conduct current in a second direction opposite the first direction; and the first portion of the data coil is connected at a ground node to the second portion of the data coil;
the power coil being structured to: receive power without data; and output the received power without data by inductive coupling.
2. The device of claim 1 , wherein the power coil is structured to receive power without data from a transmitter.
3. The device of claim 1 , wherein the power coil is structured to output the received power without data by inductive coupling across an isolation barrier.
4. The device of claim 1 , wherein the power coil is a first power coil, and the first power coil is structured to output the received power without data by inductive coupling to a second power coil.
5. The device of claim 1 , wherein the data coil is structured to: receive data; and output the received data by inductive coupling.
6. The device of claim 5 , wherein the data coil is structured to receive data from a transmitter.
7. The device of claim 5 , wherein the data coil is structured to output the received data by inductive coupling across an isolation barrier.
8. The device of claim 5 , wherein the data coil is a first data coil, and the first data coil is structured to output the received data by inductive coupling to a second data coil that is isolated from the ground node.
9. The device of claim 1 , wherein the first and second portions of the data coil are substantially identical to one another, yet reversed from one another.
10. The device of claim 1 , wherein the data coil has a symmetric 8-shape substantially centered within the power coil.
11. A device, comprising:
an inductive structure including a power coil and a data coil, wherein: the data coil is substantially centered within the power coil; a first portion of the data coil is structured to conduct current in a first direction; a second portion of the data coil is structured to conduct current in a second direction opposite the first direction; and the first portion of the data coil is connected at a ground node to the second portion of the data coil;
the power coil being structured to: receive power without data by inductive coupling; and output the received power without data.
12. The device of claim 11 , wherein the power coil is structured to receive power without data by inductive coupling across an isolation barrier.
13. The device of claim 11 , wherein the power coil is a first power coil, and the first power coil is structured to receive power without data by inductive coupling from a second power coil.
14. The device of claim 11 , wherein the power coil is structured to output the received power without data to a receiver.
15. The device of claim 11 , wherein the data coil is structured to: receive data by inductive coupling; and output the received data.
16. The device of claim 15 , wherein the data coil is structured to receive data by inductive coupling across an isolation barrier.
17. The device of claim 15 , wherein the data coil is a first data coil, and the first data coil is structured to receive data by inductive coupling from a second data coil that is isolated from the ground node.
18. The device of claim 15 , wherein the data coil is structured to output the received data to a receiver.
19. The device of claim 11 , wherein the first and second portions of the data coil are substantially identical to one another, yet reversed from one another.
20. The device of claim 11 , wherein the data coil has a symmetric 8-shape substantially centered within the power coil.
21. A device, comprising:
an inductive structure including a power coil and a data coil, wherein: the data coil is substantially centered within the power coil; a first portion of the data coil is structured to conduct current in a first direction; a second portion of the data coil is structured to conduct current in a second direction opposite the first direction; and the first portion of the data coil is connected at a ground node to the second portion of the data coil;
the power coil being structured to: receive power without data from a transmitter; and output the received power without data by inductive coupling across an isolation barrier; and
the data coil being structured to: receive data from the transmitter; and output the received data by inductive coupling across the isolation barrier.
22. The device of claim 21 , wherein the power coil is a first power coil, and the first power coil is structured to output the received power without data by inductive coupling to a second power coil.
23. The device of claim 22 , wherein the data coil is a first data coil, and the first data coil is structured to output the received data by inductive coupling to a second data coil that is isolated from the ground node.
24. The device of claim 21 , wherein the first and second portions of the data coil are substantially identical to one another, yet reversed from one another.
25. The device of claim 21 , wherein the data coil has a symmetric 8-shape substantially centered within the power coil.
26. A device, comprising:
an inductive structure including a power coil and a data coil, wherein: the data coil is substantially centered within the power coil; a first portion of the data coil is structured to conduct current in a first direction; a second portion of the data coil is structured to conduct current in a second direction opposite the first direction; and the first portion of the data coil is connected at a ground node to the second portion of the data coil;
the power coil being structured to: receive power without data by inductive coupling across an isolation barrier; and output the received power without data to a receiver; and
the data coil being structured to: receive data by inductive coupling across the isolation barrier; and output the received data to the receiver.
27. The device of claim 26 , wherein the power coil is a first power coil, and the first power coil is structured to receive power without data by inductive coupling from a second power coil.
28. The device of claim 27 , wherein the data coil is a first data coil, and the first data coil is structured to receive data by inductive coupling from a second data coil that is isolated from the ground node.
29. The device of claim 26 , wherein the first and second portions of the data coil are substantially identical to one another, yet reversed from one another.
30. The device of claim 26 , wherein the data coil has a symmetric 8-shape substantially centered within the power coil.
31. A method, comprising:
conducting current in a first direction through a first portion of a data coil of an inductive structure, wherein the inductive structure includes a power coil within which the data coil is substantially centered;
conducting current in a second direction through a second portion of the data coil, wherein: the second direction is opposite the first direction; and the first portion of the data coil is connected at a ground node to the second portion of the data coil; and
with the power coil, receiving power without data, and outputting the received power without data by inductive coupling.
32. The method of claim 31 , wherein receiving power without data includes: receiving power without data from a transmitter.
33. The method of claim 31 , wherein outputting the received power without data by inductive coupling includes: outputting the received power without data by inductive coupling across an isolation barrier.
34. The method of claim 31 , wherein the power coil is a first power coil, and outputting the received power without data by inductive coupling includes: outputting the received power without data by inductive coupling to a second power coil.
35. The method of claim 31 , and comprising:
with the data coil, receiving data, and outputting the received data by inductive coupling.
36. The method of claim 35 , wherein receiving data includes: receiving data from a transmitter.
37. The method of claim 35 , wherein outputting the received data by inductive coupling includes: outputting the received data by inductive coupling across an isolation barrier.
38. The method of claim 35 , wherein the data coil is a first data coil, and outputting the received data by inductive coupling includes: outputting the received data by inductive coupling to a second data coil that is isolated from the ground node.
39. The method of claim 31 , wherein the first and second portions of the data coil are substantially identical to one another, yet reversed from one another.
40. The method of claim 31 , wherein the data coil has a symmetric 8-shape substantially centered within the power coil.
41. A method, comprising:
conducting current in a first direction through a first portion of a data coil of an inductive structure, wherein the inductive structure includes a power coil within which the data coil is substantially centered;
conducting current in a second direction through a second portion of the data coil, wherein: the second direction is opposite the first direction; and the first portion of the data coil is connected at a ground node to the second portion of the data coil; and
with the power coil, receiving power without data by inductive coupling, and outputting the received power without data.
42. The method of claim 41 , wherein receiving power without data by inductive coupling includes: receiving power without data by inductive coupling across an isolation barrier.
43. The method of claim 41 , wherein the power coil is a first power coil, and receiving power without data by inductive coupling includes: receiving power without data by inductive coupling from a second power coil.
44. The method of claim 41 , wherein outputting the received power without data includes: outputting the received power without data to a receiver.
45. The method of claim 41 , and comprising:
with the data coil, receiving data by inductive coupling, and outputting the received data.
46. The method of claim 45 , wherein receiving data by inductive coupling includes: receiving data by inductive coupling across an isolation barrier.
47. The method of claim 45 , wherein the data coil is a first data coil, and receiving data by inductive coupling includes: receiving data by inductive coupling from a second data coil that is isolated from the ground node.
48. The method of claim 45 , wherein outputting the received data includes: outputting the received data to a receiver.
49. The method of claim 41 , wherein the first and second portions of the data coil are substantially identical to one another, yet reversed from one another.
50. The method of claim 41 , wherein the data coil has a symmetric 8-shape substantially centered within the power coil.