摘要:
Various techniques are described to terminate a differential wire pair using combinations of CMCs, transformers, autotransformers, differential mode chokes (DMCs), and AC-coupling capacitors. The techniques improve the AC common mode insertion loss without attenuating the differential data signals, while easing the requirements of the CMC. In one example, an autotransformer, having a first winding, a second winding, and a center tap, is connected across a PHY, where the center tap provides a low impedance to ground for attenuating common mode noise. A CMC is coupled across the autotransformer and a pair of wires carrying differential data, where the CMC greatly attenuates common mode noise. The requirements of the CMC are reduced due to the autotransformer.
摘要:
Patch cords include a communications cable that has a first conductor and a second conductor that form a first differential pair, and a third conductor and a fourth conductor that form a second differential pair and a plug that is attached to the communications cable. The plug includes a housing that receives the communications cable, first through fourth plug contacts that are within the housing, and a printed circuit board. The printed circuit board includes first through fourth conductive paths that connect the respective first through fourth conductors to respective ones of the first through fourth plug contacts. The plug further includes a first conductive shield that extends above a top surface of the printed circuit board that is disposed between the first differential pair and the second differential pair.
摘要:
A modular connector plug includes controlled capacitances to compensate for near end cross talk at the connector interface created by interaction of signals having signal frequencies in a data transmission bandwidth. A printed circuit board (PCB) is configured to receive cable pairs, and a connector assembly includes first and fourth plug contacts corresponding to the first cable pair and second and third plug contacts corresponding to the second cable pair. First ends of each contact are connected to the PCB, and second ends extend in parallel with each other and transversely to the PCB length, collectively defining a contact interface proximate the contact end. Each contact has a maximum width at the contact interface, with at least one plug contact having a maximum width greater than the maximum width of another plug contact. Each contact accordingly defines an electrode of a compensating capacitance formed between adjacent pairs of plug contacts.
摘要:
A method and apparatus for providing a tracer function for networked cable systems used for data or power transmission. A self contained and self powered indicator circuit is described that enables tracing the location of both ends of a networked cable.
摘要:
A twisted pair communications device and associated twisted pair communications system are disclosed. One twisted pair communications device includes a plurality of twisted pair connectors each associated with a different twisted pair communication channel, and a multi-channel connector communicatively connected to each of the plurality of twisted pair connectors. The multi-channel connector is configured to transmit and receive communication signals associated with each of the twisted pair communication channels on a multi-channel twisted pair cable and includes a plurality of wire pairs disposed in a plurality of rows within the connector. Fewer than all of the plurality of wire pairs are communicatively connected to twisted pair connectors, and wherein unassociated wire pairs in the multi-channel connector separate at least two groups of wire pairs associated with different twisted pair communication channels.
摘要:
The present invention relates to data cable and methods of installing/building data cable. The cable disclosed herein is indoor/outdoor and can be configured as 4-twisted pair, or any of the numerous other types of data cable. In one embodiment, we disclose an electrical data cable comprising a plurality of insulated wires wherein the plurality of insulated wires is coupled for a first portion of the length of the data cable so as to form at least one twisted pair of wires; the plurality of insulated wires is configured in a flat, planar arrangement for a second portion of the data cable; and the plurality of insulated wires is coupled for a third portion of the length of the data cable so as to form at least one twisted pair of wires. In an alternate method, we disclose a method of attaching a connector to the electrical data cable comprising the steps of cutting the data cable at the untwisted segment and attaching a connector to the plurality of insulated wires in the untwisted segment.
摘要:
Patch cords include a communications cable that has a first conductor and a second conductor that form a first differential pair, and a third conductor and a fourth conductor that form a second differential pair and a plug that is attached to the communications cable. The plug includes a housing that receives the communications cable, first through fourth plug contacts that are within the housing, and a printed circuit board. The printed circuit board includes first through fourth conductive paths that connect the respective first through fourth conductors to respective ones of the first through fourth plug contacts. The plug further includes a first conductive shield that extends above a top surface of the printed circuit board that is disposed between the first differential pair and the second differential pair.
摘要:
An electrical connector (100) includes an insulative body (1) comprising a rear part (11), a front widened tongue (121), and a front narrowed tongue (122), a plurality of contacts (2) received in the insulative body, a metallic shell (3) enclosing the insulative body, a spacer (5) assembled to the insulative body for supporting the contacts, and a cable connected with the contacts and comprising two STP (Shielded Twisted Pair) wires (62) for high speed signal transmission, each of the two STP wires having a front section without aluminum foil. The metallic shell comprises a front shell (32) and a rear shell (33) assembled with each other, the rear shell defines a vertical blade (335) bent downwards from a top wall thereof, and the vertical blade extends downwards and is located between the front sections of the STP wires.
摘要:
High speed connector inserts and cables having improved heat conduction, high strength, and may be manufactured in a reliable manner. One example may provide a connector insert having several paths by which heat may be removed from circuitry in the cable insert. In one example, heat may be removed from one or more circuits by forming a thermal path between a circuit and a shield of the connector insert. Another path may include one or more pads on a side of an integrated circuit board that are soldered directly to the shield. A braiding surrounding a cable may be soldered or otherwise thermally connected to the shield. Another example may provide a cable having a braiding that includes one or more types of fibers, such as aramid fibers. Another example may provide for increased manufacturability by using a wire comb and a solder bar.
摘要:
A plug for an electrical plug-type connector includes a plurality of plug contacts, which are electrically connected or connectable to a corresponding number of connecting elements, for example insulation displacement contacts, clamping contacts or possibly also soldered joints, each for connecting one electrical cable core. Per plug contact, one conductor is formed as a conductor track which is grown three-dimensionally on the surface of a plug body in the form of a cast plastics part and adheres there, and which both forms the plug contact and electrically connects the plug contact to the connecting element.