Electrical connectors – Electromagnetic or electrostatic shield – Multi-part shield body
Reexamination Certificate
2002-05-24
2003-11-25
Gushi, Ross (Department: 2833)
Electrical connectors
Electromagnetic or electrostatic shield
Multi-part shield body
C439S941000
Reexamination Certificate
active
06652318
ABSTRACT:
FIELD OF THE INVENTION
The invention relates in general to electrical connectors. More particularly, the invention relates to methods and apparatuses for reducing cross-talk in high speed electrical connectors.
BACKGROUND OF THE INVENTION
Electrical connectors provide signal connections between electronic devices using signal contacts. Often, the signal contacts are so closely spaced that undesirable cross-talk occurs between nearby signal contacts. Cross-talk occurs when one signal contact induces electrical interference in a nearby signal contact thereby compromising signal integrity. With electronic device miniaturization and high speed electronic communications becoming more prevalent, the reduction of cross-talk becomes a significant factor in connector design.
One method for reducing cross-talk is to provide separate shields within the connector. In this manner, the shields act to block the cross-talk from affecting nearby signal contacts. With connector space being a premium, however, shields take up valuable space within the connector that could otherwise be used for more signal contacts. Shields also reduce characteristic impedance of adjacent differential pairs, often making it difficult to achieve the desired characteristic impedance in high density connectors. In addition to spacing and impedance issues, manufacturing and inserting the connector shields increases the overall manufacturing costs associated with the connectors. Therefore, a need exists for a high speed electrical connector (one that operates above 1 Gb/s) that reduces the occurrence of cross-talk without the need for separate shielding plates.
BRIEF SUMMARY OF THE INVENTION
The invention satisfies the aforementioned need by providing a high speed connector (operating above 1 Gb/s) that prevents the incidence of multi-active cross-talk. In this manner, and in one embodiment of the invention, the differential pairs and ground contacts are arranged within the connector in such a manner so as to reduce undesirable multi-active cross-talk that occurs between the differential pairs.
In particular, and in one embodiment of the invention, a high speed electrical connector for connecting a plurality of electrical devices is disclosed. Specifically, the connector includes a connector housing and a plurality of columns of differential contact pairs disposed within the housing, each differential contact pair includes a first signal contact for transmitting a signal having a first polarity and a second signal contact for transmitting a signal having a second polarity, opposite to said first polarity. The connector also includes a plurality of ground contacts wherein a ground contact is disposed between each differential contact pair within each column of differential contact pairs and wherein each column of differential contact pairs and ground contacts is offset from an adjacent column such that multi-active cross-talk is reduced with respect to each differential contact pair.
REFERENCES:
patent: 3669054 (1972-06-01), Desso et al.
patent: 3748633 (1973-07-01), Lundergan
patent: 4260212 (1981-04-01), Ritchie et al.
patent: 4288139 (1981-09-01), Cobaugh et al.
patent: 4776803 (1988-10-01), Pretchel et al.
patent: 5077893 (1992-01-01), Mosquera et al.
patent: 5174770 (1992-12-01), Sasaki et al.
patent: 5274918 (1994-01-01), Reed
patent: 5590463 (1997-01-01), Feldman et al.
patent: 5609502 (1997-03-01), Thumma
patent: 5741144 (1998-04-01), Elco et al.
patent: 5795191 (1998-08-01), Preputnick et al.
patent: 5961355 (1999-10-01), Morlion et al.
patent: 6068520 (2000-05-01), Winings et al.
patent: 6123554 (2000-09-01), Ortega et al.
patent: 6125535 (2000-10-01), Chiou et al.
patent: 6146157 (2000-11-01), Lenoir et al.
patent: 6146203 (2000-11-01), Elco et al.
patent: 6190213 (2001-02-01), Reichart et al.
patent: 6212755 (2001-04-01), Shimada et al.
patent: 6219913 (2001-04-01), Uchiyama
patent: 6220896 (2001-04-01), Bertoncini et al.
patent: 6269539 (2001-08-01), Takahashi et al.
patent: 6328602 (2001-12-01), Yamasaki et al.
patent: 6347952 (2002-02-01), Kline et al.
patent: 6363607 (2002-04-01), Chen et al.
patent: 6379188 (2002-04-01), Cohen et al.
patent: 6409543 (2002-06-01), Astbury, Jr. et al.
patent: 6431914 (2002-08-01), Billman
patent: 6435914 (2002-08-01), Billman
patent: 6461202 (2002-10-01), Kline
patent: 6471548 (2002-10-01), Bertoncini et al.
patent: 6554647 (2003-04-01), Cohen et al.
Sercu Stefaan Hendrik Josef
Shuey Joseph B.
Smith Stephen B.
Winings Clifford L.
FCI Americas Technology Inc.
Gushi Ross
Woodcock & Washburn LLP
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