Communications plugs and patch cords with mode conversion control circuitry
AssigneeCommonScope, Inc. of North Carolina
InventorsAmid I. Hashim, Richard A. Schumacher
Life of this patent
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Abstract
Patch cords include a communications cable that has first through eighth conductors that are arranged as four twisted pairs and a plug attached thereto. The plug includes a housing that receives the cable, first through eighth plug contacts, and a printed circuit board that includes first through eighth conductive paths that connect the first through eighth conductors to the respective first through eighth plug contacts. The plug further includes a first crosstalk injection circuit between the second conductive path and the sixth conductive path and a second crosstalk injection circuit between the first conductive path and the sixth conductive path.
Claims25
A patch cord comprising:
- a communications cable that includes first through eighth conductors, wherein the fourth and fifth conductors are twisted together to form a first twisted pair, the first and second conductors are twisted together to form a second twisted pair, the third and sixth conductors are twisted together to form a third twisted pair, and the seventh and eighth conductors are twisted together to form a fourth twisted pair;
- and
- a plug that is attached to the communications cable, the plug comprising:
- a housing that receives the communications cable;
- first through eighth plug contacts;
- a printed circuit board that is at least partly within the housing, the printed circuit board including first through eighth conductive paths that connect the first through eighth conductors to the respective first through eighth plug contacts;
- and
- a first crosstalk injection circuit between the second conductive path and the sixth conductive path;
- and
- a second crosstalk injection circuit between the first conductive path and the sixth conductive path.
(canceled)
12-24. (canceled)
An RJ-45 communications plug that has first through eighth conductive paths where the fourth and fifth conductive paths are part of a first differential transmission line, the first and second conductive paths are part of a second differential transmission line, the third and sixth conductive paths are part of a third differential transmission line, and the seventh and eighth conductive paths are part of a fourth differential transmission line, wherein the first, third, fifth and seventh conductive paths are tip conductive paths and the second, fourth, sixth and eighth conductive paths are ring conductive paths, the plug comprising:
- a housing;
- first through eighth plug blades that are at least partially within the housing and that are electrically connected to the respective first through eighth conductive paths, the first through eighth plug blades aligned in a row in numerical order;
- an offending crosstalk circuit that is separate from the plug blades that injects crosstalk between the second and third differential transmission lines, where the offending crosstalk circuit is between a ring conductive path and a tip conductive path;
- and
- a differential-to-common mode crosstalk cancellation circuit that is electrically connected between the second differential transmission line and the third differential transmission line.
An RJ-45 communications plug that has first through eighth conductive paths that are arranged as first through fourth differential transmission lines, the plug comprising:
- a housing;
- first through eighth plug blades that are at least partially within the housing and that are electrically connected to the respective first through eighth conductive paths;
- and
- a capacitor and a resistor electrically coupled in series between two of the first through eighth conductive paths.
(canceled)
Dependencies are inferred from the claim text.