Device for reducing crosstalk

• US 7,476,131 B2
• Filed: 09/29/2006
• Issued: 01/13/2009
• Est. Priority Date: 09/29/2006
• Status: Active Grant

• Current Assignee: Covidien LP (Medtronic Plc)
• Original Assignee: Nellcor Puritan Bennett LLC (Medtronic Plc)
• Inventors: Mannheimer, Paul D., Chew, Bradford B., Sawatari, Ken
• Primary Examiner(s): Prasad; Chandrika
• Application Number:
  US11/540,376
• Publication Number:
  US 20080081508A1
• Time in Patent Office: 837 Days
• Field of Search: 439/676, 439/418, 439/76.1, 600/323, 600/325, 600/344
• US Class Current: 439/676
• CPC Class Codes: A61B 2562/222 Electrical cables or leads therefor, e.g. coaxial cables or ribbon cables
• CPC Class Codes: A61B 5/1455 using optical sensors, e.g. spectral photometrical oximeters
• CPC Class Codes: H01R 13/6461 Means for preventing cross-talk
• CPC Class Codes: H01R 13/65915 Twisted pair of conductors surrounded by shield
• CPC Class Codes: H01R 13/6658 on printed circuit board H01R13/6666 - H01R13/6691 take precedence

Abstract

A device and method for reducing crosstalk between wires is provided. The method includes spatially separating first and second sets of wires. A device is disposed relative to the first and second sets of wires to maintain the spatial separation. The method also comprises coupling pins to the first and second sets of wires. Additionally, the method includes covering the device with a connector housing.

Claims

1. A pulse oximetry cable assembly comprising:

a cable having a first pair of wires and a second pair of wires, wherein the first and second pairs of wires are surrounded by an outer shield and the second pair of wires are surrounded by an inner shield; and

an insulative piece, wherein the insulative piece comprises a printed circuit board configured to maintain spatial separation between the first and second pairs of wires, the insulative piece comprising;

a first side and a second side, wherein the first pair of wires are coupled to conductive members located on the first side of the insulative piece and the second pair of wires are coupled to conductive members located on the second side of the insulative piece, the conductive members comprising solder pads and traces coupled to the solder pads, wherein the traces and solder pads are configured to spatially separate the first pair of wires from the second pair of wires, the traces being configured to route emitter signals carried on the first pair of wires away from detector signals carried on the second pair of wires; and

inner shield traces and outer shield traces, wherein the inner shield is coupled to the inner shield traces and the outer shield is coupled to outer shield traces, the inner shield traces being configured to encompass detector contacts on the printed circuit board and the outer shield traces being configured to encompass emitter contacts on the printed circuit board.

2. The cable assembly of claim 1, wherein the insulative piece supports a conductive piece, the conductive piece being electrically grounded and positioned in between the first and second pairs of wires.

3. The cable assembly of claim 1, comprising a sensor coupled to the first and second pairs of wires.

4. The cable assembly according to claim 1, comprising a connector for coupling the cable assembly to a pulse oximeter.

10. The pulse oximetry cable assembly of claim 1 comprising a connector housing formed over the insulative piece.

5. A device for reducing crosstalk comprising:

a multi-surface printed circuit board comprising;

a first surface having a first plurality of contacts, wherein a pair of emitter wires are coupled to the first surface and electrically coupled with two adjacent contacts on the first surface; and

a second surface having a second plurality of contacts, wherein a pair of detector wires are coupled to the second surface and one wire of the pair of detector wires is electrically coupled to one of the second plurality of contacts on the second surface.

6. The device of claim 5, wherein one contact of the first plurality of contacts on the first surface is electrically coupled to another wire of the pair of detector wires.

7. The device of claim 5, wherein the first surface comprises an outer shield trace configured to surround the two adjacent contacts electrically coupled with the pair of emitter wires, wherein the outer shield trace is electrically coupled to an outer shield that surrounds the pairs of emitter and detector wires in a cable.

8. The device of claim 6, wherein the first surface comprises an inner shield trace configured to surround the one contact of the first plurality of contacts on the first surface electrically coupled to one wire of the pair of detector wires, wherein the inner shield trace is electrically coupled to an inner shield that surrounds the pair of detector wires in a cable.

9. The device of claim 8, wherein the second surface comprises an inner shield trace which is electrically coupled to the inner shield trace of the first surface, the inner shield trace of the second surface being configured to surround the one contact of the second plurality of contacts electrically coupled to one wire of the pair of detector wires.