Magnetic coupling device and communication system

Patent metadata

Field	Value
Publication number	US-2021006298-A1
Application number	US-202017023767-A
Country	US
Kind code	A1
Filing date	Sep 17, 2020
Priority date	Sep 7, 2018
Publication date	Jan 7, 2021
Grant date	—

Abstract

According to one embodiment, there is provided a magnetic coupling device including a first coil, a second coil, a third coil, a fourth coil, a first constant-potential node and a second constant-potential node. The second coil is electrically connected with one end of the first coil and wound in a direction opposite to a direction in which the first coil is wound. The third coil faces the first coil. The fourth coil faces the second coil. The first constant-potential node is electrically connected with one end of the third coil. The second constant-potential node is electrically connected with one end of the fourth coil.

First claim

1 - 20 . (canceled)

21 . A magnetic coupling device comprising:
a first coil; a second coil electrically connected with the first coil at each most outer point, the second coil being arranged substantially on a same plane as the first coil, the first coil and the second coil forming an 8-shaped coil, the first coil being wound from a most inner point to the most outer point along a first rotation direction, the second coil being wound from the most outer point to a most inner point along a second rotation direction when seen from a direction perpendicular to the plane, the second rotation direction being opposite to the first rotation direction; a third coil facing the first coil; a fourth coil facing the second coil; a first constant-potential node electrically connected with a first end of the third coil; and a second constant-potential node electrically connected with a first end of the fourth coil.

22 . The magnetic coupling device according to claim 21 , wherein
the third coil is wound from a most inner point to a most outer point along the first rotation direction when seen from the direction perpendicular to the plane, and the fourth coil is wound from a most inner point to a most outer point along the first rotation direction when seen from the direction perpendicular to the plane.

23 . The magnetic coupling device according to claim 21 , wherein
the third coil is wound from a most inner point to a most outer point along the first rotation direction when seen from the direction perpendicular to the plane, and the fourth coil is wound from a most inner point to a most outer point along a third rotation direction when seen from the direction perpendicular to the plane, the third rotation direction being opposite to the first rotation direction.

24 . The magnetic coupling device according to claim 21 , further comprising:
a pair of a first input node and a second input node; a first capacitor element electrically connected between the first input node and a second end of the third coil; and a second capacitor element electrically connected between the second input node and a second end of the fourth coil.

25 . The magnetic coupling device according to claim 21 , further comprising:
a pair of a first output node and a second output node; a first capacitor element electrically connected between the first output node and a second end of the third coil; and a second capacitor element electrically connected between the second output node and a second end of the fourth coil.

26 . The magnetic coupling device according to claim 21 , wherein
the first constant-potential node and the second constant-potential node have potentials equal to each other.

27 . The magnetic coupling device according to claim 21 , wherein
the first constant-potential node and the second constant-potential node have potentials different from each other.

28 . The magnetic coupling device according to claim 22 , further comprising:
a pair of a first input node and a second input node; a first capacitor element electrically connected between the first input node and a second end of the third coil; and a second capacitor element electrically connected between the second input node and a second end of the fourth coil.

29 . The magnetic coupling device according to claim 22 , further comprising:
a pair of a first output node and a second output node; a first capacitor element electrically connected between the first output node and a second end of the third coil; and a second capacitor element electrically connected between the second output node and a second end of the fourth coil.

30 . The magnetic coupling device according to claim 22 , wherein
the first constant-potential node and the second constant-potential node have potentials equal to each other.

31 . The magnetic coupling device according to claim 22 , wherein
the first constant-potential node and the second constant-potential node have potentials different from each other.

32 . The magnetic coupling device according to claim 23 , further comprising:
a pair of a first input node and a second input node; a first capacitor element electrically connected between the first input node and a second end of the third coil; and a second capacitor element electrically connected between the second input node and a second end of the fourth coil.

33 . The magnetic coupling device according to claim 23 , wherein
the first constant-potential node and the second constant-potential node have potentials equal to each other.

34 . The magnetic coupling device according to claim 23 , wherein
the first constant-potential node and the second constant-potential node have potentials different from each other.

35 . A communication system comprising:
a transmission circuit; and the magnetic coupling device according to claim 24 , wherein the first input node and the second input node are electrically connected to the transmission circuit.

36 . A communication system comprising:
a transmission circuit; and the magnetic coupling device according to claim 28 , wherein the first input node and the second input node are electrically connected to the transmission circuit, and the transmission circuit is a differential driver circuit to transmit differential signals to the first input node and the second input node.

37 . A communication system comprising:
a transmission circuit; and the magnetic coupling device according to claim 32 , wherein the first input node and the second input node both electrically connected to the transmission circuit, and the transmission circuit is an in-phase driver circuit or a single-phase driver circuit to transmit in-phase signals or single-phase signals to the first input node and the second input node.

38 . A communication system comprising:
a reception circuit; and the magnetic coupling device according to claim 25 , wherein the first output node and the second output node are electrically connected to the reception circuit.

39 . A communication system comprising:
a reception circuit; and the magnetic coupling device according to claim 29 , wherein the first output node and the second output node both electrically connected to the reception circuit, and the reception circuit is a differential receiver circuit to receive differential signals from the first output node and the second output node.

40 . A communication system comprising:
a transmission circuit; a reception circuit; and the magnetic coupling device according to claim 21 electrically connected between the transmission circuit and to the reception circuit.

Assignees

• Toshiba Kk
• Toshiba Electronic Devices & Storage Corp

Inventors

• Uo Toyoaki
• Suzuki Tsuneo
• Ishihara Hiroaki

Classifications

• H03H7/00

  Multiple-port networks comprising only passive electrical elements as network components · CPC title

• H04B5/0087 Primary

  Electricity · mapped topic

• H04B5/263 Primary

  Multiple coils at either side · CPC title

• H04B5/48

  Transceivers · CPC title

• H01F2027/2809

  on stacked layers · CPC title