Printed circuit board assembly with ferrite for medical device

Patent metadata

Field	Value
Publication number	US-9872626-B2
Application number	US-201514934783-A
Country	US
Kind code	B2
Filing date	Nov 6, 2015
Priority date	Nov 7, 2014
Publication date	Jan 23, 2018
Grant date	Jan 23, 2018

Abstract

A printed circuit board assembly includes a printed circuit board and a ferrite. The printed circuit board has a substantially planar top surface and a substantially planar bottom surface. The ferrite has an annular cross section that defines a channel. The ferrite is positioned on the printed circuit board such that a portion of the plurality of traces passes through the channel.

First claim

What is claimed is:

1. A printed circuit board assembly, comprising:
a printed circuit board, comprising:
a plurality of traces;
two slots defining a tongue portion of the printed circuit board;
a substantially planar top surface; and
a substantially planar bottom surface; and

a ferrite having an annular cross section defining a channel,
wherein the ferrite extends through the two slots and is positioned on and surrounds at least part of the tongue portion of the printed circuit board, such that a portion of the plurality of traces passes through the channel of the ferrite.

2. The printed circuit board assembly of claim 1 , wherein the annular cross section is formed by two separate pieces that are joined together.

3. The printed circuit board assembly of claim 1 , wherein the annular cross section is substantially rectangular.

4. A medical device, comprising:
a housing; and
a printed circuit board assembly supported by the housing, the printed circuit board assembly comprising:
a printed circuit board including a plurality of traces and two slots defining a tongue portion,
wherein the printed circuit board has a substantially planar top surface and a substantially planar bottom surface; and
wherein at least some of the plurality of traces carry sensitive signals;

a ferrite extending through the two slots and surrounding at least part of the tongue portion, the ferrite having an annular cross section, the annular cross section defining a channel,
wherein the ferrite is positioned on the tongue portion such that a portion of the plurality of traces passes through the channel.

5. The printed circuit board assembly of claim 1 , further comprising a connector assembly
positioned on a distal end of the tongue portion,
wherein the ferrite is positioned on the distal end of the tongue portion.

6. The printed circuit board assembly of claim 5 , wherein at least some of the plurality of traces carry a sensitive signal, and
wherein, when the plurality of traces pass through the channel, the plurality of traces are positioned between the substantially planar top surface and the substantially planar bottom surface of the printed circuit board.

7. The printed circuit board assembly of claim 6 , wherein the sensitive signal includes vital signs data.

8. The printed circuit board assembly of claim 7 , wherein the connector assembly is configured to receive vital signs data from an external device.

9. The printed circuit board assembly of claim 1 , further comprising a plurality of mounting elements configured to mate with a plurality of complementary mounting elements positioned on a medical device main assembly.

10. A medical device, comprising:
a printed circuit board assembly in communication, the printed circuit board assembly comprising:
a printed circuit board including a plurality of traces, a tongue portion defined by two slots in the printed circuit board, a substantially planar top surface and a substantially planar bottom surface; and
a ferrite extending through the two slots and surrounding at least part of the tongue portion, the ferrite having a first portion positioned on the substantially planar top surface and a second portion positioned on the substantially planar bottom surface,
wherein the ferrite is positioned on the tongue portion of the printed circuit board such that a portion of the plurality of traces passes between the first portion and the second portion.

11. The medical device of claim 10 , wherein the first portion of the ferrite is integral with the second portion of the ferrite.

12. The medical device of claim 11 , wherein the ferrite has an annular cross section.

13. The medical device of claim 12 , wherein a cross section of the ferrite is substantially rectangular annular, an inner surface of the ferrite defining a channel;
wherein the plurality of traces carry a sensitive signal, and
wherein, when the plurality of traces pass through the channel, the plurality of traces are positioned between the substantially planar top surface and the substantially planar bottom surface of the printed circuit board.

14. The medical device of claim 13 , further comprising a connector assembly
positioned on a distal end of the tongue portion,
wherein the ferrite is positioned on the distal end of the tongue portion adjacent to the connector assembly.

15. The medical device of claim 14 , wherein the sensitive signal includes vital sign data; and
wherein the connector assembly is configured to receive vital signs data from an external device.

16. The medical device of claim 15 , further comprising a plurality of mounting elements configured to mate with a plurality of complementary mounting elements positioned on a main assembly board.

17. The medical device of claim 4 , further comprising a connector assembly
positioned on a distal end of the tongue portion;
wherein the ferrite is positioned on the distal end of the tongue portion;
wherein the annular cross section is substantially rectangular;
wherein at least some of the plurality of traces carry a sensitive signal including vital signs data, and
wherein, when the plurality of traces pass through the channel of the ferrite, the plurality of traces do not transition from their electrical shielding.

18. The medical device of claim 17 , wherein the connector assembly is configured to connect to a cable connected to a vital signs device.

19. The medical device of claim 18 , further comprising a plurality of mounting elements configured to mate with a plurality of complementary mounting elements positioned on a medical device main assembly.

Assignees

• Welch Allyn Inc

Inventors

• Delucia Paul
• Knieriem Alan S
• Babson David M
• Fallat David M

Classifications

• H02J7/342

  The other DC source being a battery actively interacting with the first one, i.e. battery to battery charging (with circuits for polarity protection H02J7/68) · CPC title

• H05K1/183

  associated with components mounted in and supported by recessed areas of the PCBs · CPC title

• A61B5/02141 Primary

  Details of apparatus construction, e.g. pump units or housings therefor, cuff pressurising systems, arrangements of fluid conduits or circuits (A61B5/02233, A61B5/0235 take precedence) · CPC title

• A61B5/7405

  using sound · CPC title

• H05K2201/1003

  Non-printed inductor · CPC title