IEEE 1394 active wall disconnect and aircraft qualified cable

Details IEEE 1394 active wall disconnect and aircraft qualified cable IEEE 1394 active wall disconnect and aircraft qualified cable

1996-09-16

1999-08-31

Kincaid, Kristine

Electricity: conductors and insulators

Anti-inductive structures

Conductor transposition

174 36, 174102R, H01B 1102

Patent

active

059456310

ABSTRACT:
An IEEE 1394 cable includes two individually shielded twisted data pairs of wires, carrying differential signals TPA and TPB, and two power conductors, carrying power signals VP and VG. The two twisted data pairs of wires are each individually shielded by a braided shield. The cable also includes an overall braided shield and a no smoke, no halogen, flame retardant jacket. Preferably, the cable has a length of 4.5 meters and includes 26 gauge wire for the two twisted data pairs. Longer, alternate embodiments of the cable incorporate heavier gauge wire for the two twisted data pairs. Preferably, the gauge wire used for the two power conductors is constant for the different lengths of cable. An active disconnect is used to provide an active repeater between IEEE 1394 cables. The active disconnect provides ports, into which cables are connected, and a physical connection including electronics necessary to form an active node on the IEEE 1394 serial bus. The active disconnect receives signals from one port and resynchronizes, encodes and transmits those signals out of the other ports. The active disconnect draws power from the power conductors of the IEEE 1394 cables which are coupled to it.

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"1394 200 Mb/s PHYsical Layer Transceiver," IBM Microelectronics, Product Data Sheet and Application Notes, Version 1.4, Mar. 14, 1996.
"IEEE 1394-1995 Triple Cable Transceiver/Arbiter," Texas Instruments TSB21LV03, Product Review, Revision 0.99, Mar. 19, 1996.
"P1394 Standard for a High Performance Serial Bus," IEEE Standard 1394 (Draft), P1394 Draft 8.0v2, Jul. 7, 1995.

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