John M Dunham

US Patent:

6827611, Dec 7, 2004

Filed:

Jun 18, 2003

Appl. No.:

10/464166

Inventors:

Jason J. Payne - Nashua NH
Thomas S. Cohen - New Boston NH
John R. Dunham - Nashua NH
Mark W. Gailus - Somerville MA
Philip T. Stokoe - Attleboro MA

Assignee:

Teradyne, Inc. - Boston MA

International Classification:

H01R 13648

US Classification:

439608, 439609

Abstract:

A shielded electrical connector in which multi-beam contacts are used to improve performance of the connector. The beams are positioned to create multiple current paths through a shield member, thereby increasing the effectiveness of the shield. These contacts are used in a connector that has individual shield strips running in parallel with signal conductors. Multiple contact tails are also used to create multiple current paths. Projections from the shield strips shield adjacent signal contacts and the contact portions are positioned to increase current flow through the projections. Structures to allow beam-type contacts to be formed in a small space are also disclosed. The contact structure also reduces the impedance of the ground path.

US Patent:

6872085, Mar 29, 2005

Filed:

Sep 30, 2003

Appl. No.:

10/675087

Inventors:

Thomas S. Cohen - New Boston NH, US
Marc B. Cartier - Dover NH, US
John R. Dunham - Nashua NH, US
Jason J. Payne - Nashua NH, US

Assignee:

Teradyne, Inc. - Boston MA

International Classification:

H01R004/66

US Classification:

439108, 439608, 439947

Abstract:

There is disclosed an electrical connector assembly having a first electrical connector mateable to a second electrical connector. In one embodiment, the first electrical connector includes a plurality of wafers, with each wafer having an insulative housing, a plurality of signal conductors and a shield plate. A portion of the shield plate is exposed so that a conductive member can electrically connect the shield plates of the wafers at the exposed portion of the shield plate. In one embodiment, the second electrical connector includes an insulative housing, and a plurality of signal conductors and ground conductors in a plurality of rows. Each row corresponds to a wafer of the first electrical connector. Each signal conductor has a contact tail and each ground conductors has two contact tails. The signal conductors and the ground conductors are positioned adjacent to one another so that for each signal conductor contact tail, there are ground conductor contact tails adjacent either side of the signal conductor contact tail.

US Patent:

7074086, Jul 11, 2006

Filed:

Sep 3, 2003

Appl. No.:

10/675647

Inventors:

Thomas S. Cohen - New Boston NH, US
Marc B. Cartier - Dover NH, US
John R. Dunham - Nashua NH, US
Jason J. Payne - Nashua NH, US

Assignee:

Amphenol Corporation - Wallingford CT

International Classification:

H01R 13/58

US Classification:

439608

Abstract:

In one embodiment of the invention, there is disclosed an electrical connector connectable to a printed circuit board, the electrical connector having an insulative housing including side walls and a base. The electrical connector also includes signal conductors and ground conductors. Each of the signal conductors and ground conductors has a first contact end connectable to the printed circuit board, a second contact end, and an intermediate portion therebetween that is disposed in the base of the insulative housing. The signal conductors and the ground conductors are arranged in a plurality of rows, with each row having signal conductors and ground conductors. For each of the plurality of rows, there is a corresponding ground strip positioned adjacent thereto disposed in the base of the insulative housing. And the ground strip is electrically connected to the ground conductors of the row.

US Patent:

7094102, Aug 22, 2006

Filed:

Jul 1, 2005

Appl. No.:

11/173926

Inventors:

Thomas S. Cohen - New Boston NH, US
Mark W. Gallus - Somerville MA, US
John R. Dunham - Nashua NH, US

Assignee:

Amphenol Corporation - Wallingford CT

International Classification:

H01R 13/648

US Classification:

439608

Abstract:

A differential connector has a plurality of rows. Each row includes a plurality of signal conductors provided as differential pairs. Each signal conductor has a first contact end connectable to a printed circuit board, a second contact end, and an intermediate portion having a first width. For each differential pair, one first contact end lies along a first line parallel to the plurality of rows and the other first contact end lies along a second line parallel to and spaced from the first line. The differential connector further includes a plurality of ground conductors, with each ground conductor corresponding to a differential pair. Each ground conductor has a first contact end connectable to the printed circuit board, a second contact end, and an intermediate portion having a second width that is at least twice the first width.

US Patent:

7278886, Oct 9, 2007

Filed:

Aug 14, 2006

Appl. No.:

11/503115

Inventors:

Thomas S. Cohen - New Boston NH, US
Mark W. Gailus - Somerville MA, US
John R. Dunham - Nashua NH, US

Assignee:

Amphenol Corporation - Wallingford CT

International Classification:

H01R 13/648

US Classification:

439608

Abstract:

A differential connector has a plurality of rows. Each row includes a plurality of signal conductors provided as differential pairs. Each signal conductor has a first contact end connectable to a printed circuit board, a second contact end, and an intermediate portion having a first width. For each differential pair, one first contact end lies along a first line parallel to the plurality of rows and the other first contact end lies along a second line parallel to and spaced from the first line. The differential connector further includes a plurality of ground conductors, with each ground conductor corresponding to a differential pair. Each ground conductor has a first contact end connectable to the printed circuit board, a second contact end, and an intermediate portion having a second width that is at least twice the first width.

US Patent:

7544096, Jun 9, 2009

Filed:

Sep 24, 2007

Appl. No.:

11/902552

Inventors:

Thomas S. Cohen - New Boston NH, US
Mark W. Gallus - Somerville MA, US
John R. Dunham - Nashua NH, US

Assignee:

Amphenol Corporation - Wallingford CT

International Classification:

H01R 13/648

US Classification:

439608

Abstract:

A differential connector has a plurality of rows. Each row includes a plurality of signal conductors provided as differential pairs. Each signal conductor has a first contact end connectable to a printed circuit board, a second contact end, and an intermediate portion having a first width. For each differential pair, one first contact end lies along a first line parallel to the plurality of rows and the other first contact end lies along a second line parallel to and spaced from the first line. The differential connector further includes a plurality of ground conductors, with each ground conductor corresponding to a differential pair. Each ground conductor has a first contact end connectable to the printed circuit board, a second contact end, and an intermediate portion having a second width that is at least twice the first width.

US Patent:

8298015, Oct 30, 2012

Filed:

Oct 10, 2008

Appl. No.:

12/249608

Inventors:

Thomas S. Cohen - New Boston NH, US
Brian P. Kirk - Amherst NH, US
John R. Dunham - Windham NH, US

Assignee:

Amphenol Corporation - Wallingford CT

International Classification:

H01R 13/648

US Classification:

4396071, 439856

Abstract:

An electrical connector provides shielded signal pathways. The electrical connector includes a shield plate, a first finger that extends from an edge of the shield plate, and a second finger that extends from the edged of the shield and that is adjacent to the first finger. A channel is formed between the first finger and the second finger. A coupling is placed within the channel adjacent the first finger. The coupling includes a contact, a first connecting arm extending from a first end of the contact to a first portion of the first finger, and a second connecting arm extending from a second end of the contact to a second portion of the first finger. The first connecting arm and the second connecting arm provide at least two current paths from the contact to the first finger.

US Patent:

20210257788, Aug 19, 2021

Filed:

Jan 27, 2021

Appl. No.:

17/159855

Inventors:

- Wallingford CT, US
John Robert Dunham - Windham NH, US
Mark W. Gailus - Concord MA, US
David Levine - Amherst NH, US
Allan Astbury - Milford NH, US
Vysakh Sivarajan - Nashua NH, US
Daniel B. Provencher - Nashua NH, US
Eric Leo - Nashua NH, US

Assignee:

Amphenol Corporation - Wallingford CT

International Classification:

H01R 13/6587
H01R 13/6471
H01R 12/71
H01R 12/51

Abstract:

An electrical interconnect for passing high speed signals through an electronic system with a high density of signals and high signal integrity. The interconnect includes an electrical connector and a transition portion of a printed circuit board to which the connector is mounted. Signal conductors are connected to pads on the surface of the PCB using edge-to-pad mounting. The pads align with intermediate portions of the signal conductors such that transitions within the connector that could degrade signal integrity are avoided. The signal conductors may be positioned as individually shielded broadside coupled pairs extending in rows within the connector. Surface traces on the PCB connect the pads to signal vias aligned for vertical routing out of the connector footprint. Ground planes underlying the surface traces facilitate a transition from the signal paths in the connector to those in the PCB with low mode conversion avoiding resonances in the connector shields.