Printed circuit board assembly with ferrite for medical device

• US 9,872,626 B2
• Filed: 11/06/2015
• Issued: 01/23/2018
• Est. Priority Date: 11/07/2014
• Status: Active Grant

• Current Assignee: Welch Allyn Incorporated
• Original Assignee: Welch Allyn Incorporated
• Inventors: Delucia, Paul, Knieriem, Alan S., Babson, David M., Fallat, David M.
• Primary Examiner(s): Cruz, Dimary Lopez
• Assistant Examiner(s): Azam, Muhammed
• Application Number:
  US14/934,783
• Publication Number:
  US 20160135287A1
• Time in Patent Office: 809 Days
• Field of Search: None
• CPC Class Codes: A61B 2560/0204 of power management
• CPC Class Codes: A61B 2562/12 Manufacturing methods specially adapted for producing sensors for in-vivo measurements
• CPC Class Codes: A61B 2562/166 the sensor is mounted on a specially adapted printed circuit board
• CPC Class Codes: A61B 5/002 Monitoring the patient using a local or closed circuit, e.g. in a room or building A61B5/0017 takes precedence
• CPC Class Codes: A61B 5/02055 Simultaneously evaluating both cardiovascular condition and temperature
• CPC Class Codes: A61B 5/02141 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 Class Codes: A61B 5/02233 Occluders specially adapted therefor tourniquets A61B17/132
• CPC Class Codes: A61B 5/0235 Valves specially adapted therefor
• CPC Class Codes: A61B 5/7405 using sound
• CPC Class Codes: A61B 5/742 using visual displays A61B5/339 takes precedence
• CPC Class Codes: A61B 50/13 Trolleys, e.g. carts
• CPC Class Codes: G02F 1/133308 Support structures for LCD panels, e.g. frames or bezels
• CPC Class Codes: G02F 1/13332 Front frames
• CPC Class Codes: G02F 1/133325 Assembling processes
• CPC Class Codes: H02J 7/342 The other DC source being a battery actively interacting with the first one, i.e. battery to battery charging with circuits for polarity protection H02J7/0034
• CPC Class Codes: H05K 1/0216 Reduction of cross-talk, noise or electromagnetic interference grounding H05K1/0215
• CPC Class Codes: H05K 1/0296 Conductive pattern lay-out details not covered by sub groups H05K1/02 - H05K1/0295 H05K1/11 takes precedence; lay-out adapted to mounted component configuration H05K1/18
• CPC Class Codes: H05K 1/183 Components mounted in and supported by recessed areas of the printed circuit board
• CPC Class Codes: H05K 2201/0715 provided by an outer layer of PCB
• CPC Class Codes: H05K 2201/09063 Holes or slots in insulating substrate not used for electrical connections
• CPC Class Codes: H05K 2201/1003 : Non-printed inductor

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.

Claims

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.

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.

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.

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.

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.