Quad cable construction for IEEE 1394 data transmission
First Claim
1. A system comprising a quad cable greater than 4.5 meters in length for use within an IEEE 1394 serial bus network, the cable comprising:
- a. a first pair of differential conductors arranged parallel to each other over a length of the quad cable;
b. a second pair of differential conductors arranged parallel to each other over the length of the quad cable;
c. an inner braided shield formed around the first and second pair of differential conductors;
d. an outer braided shield formed around the first and second pair of differential conductors and the inner braided shield;
e. a shield separator positioned between the inner braided shield and the outer braided shield for maintaining electrical isolation between the inner braided shield and the outer braided shield; and
f. a flame retardant jacket formed around the outer braided shield.
1 Assignment
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Accused Products
Abstract
A quad cable includes four conductors arranged as two differential pairs for carrying the differential signals TPA and TPB. Preferably, the quad cable is used to transmit data signals between devices within an IEEE 1394 network. The two differential conductor pairs are included, with filler material, within a braided inner shield. A shield separator is formed outside of the braided inner shield. A braided outer shield is formed outside of the shield separator. The shield separator provides electrical isolation between the inner and outer shields. A cable jacket is formed outside of the braided outer shield to encase the cable. Each end of the cable includes a cable connector having a plurality of pins for coupling to a receiving connector. The four conductors and the inner shield are each coupled to a respective pin within each cable connector. When coupled to a receiving connector, the outer shield is coupled to a housing of the connector. Within unit electronics at the port housing the receiving connector, a capacitor is preferably coupled between the inner shield and the outer shield. Preferably, the quad cable has a length of 4.5 meters and includes 24 gauge wire for the conductors. Longer, alternate embodiments of the cable incorporate heavier gauge wire for the conductors. Preferably, DC power conductors are not included within the quad cable, but are provided within a separate cable or by each active local device. Alternatively, the DC power conductors are included beside the quad cable within an overall cable jacket.
187 Citations
39 Claims
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1. A system comprising a quad cable greater than 4.5 meters in length for use within an IEEE 1394 serial bus network, the cable comprising:
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a. a first pair of differential conductors arranged parallel to each other over a length of the quad cable;
b. a second pair of differential conductors arranged parallel to each other over the length of the quad cable;
c. an inner braided shield formed around the first and second pair of differential conductors;
d. an outer braided shield formed around the first and second pair of differential conductors and the inner braided shield;
e. a shield separator positioned between the inner braided shield and the outer braided shield for maintaining electrical isolation between the inner braided shield and the outer braided shield; and
f. a flame retardant jacket formed around the outer braided shield. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A system comprising an IEEE 1394 quad cable greater than 4.5 meters in length, the cable comprising:
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a. a first pair of differential conductors arranged parallel to each other over a length of the quad cable for carrying differential signals between IEEE 1394 devices; and
b. a second pair of differential conductors arranged parallel to each other over the length of the quad cable for carrying differential signals between IEEE 1394 devices. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A system comprising a quad cable greater than 4.5 meters in length for use within an IEEE 1394 serial bus network, the cable comprising:
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a. a first pair of differential conductors arranged parallel to each other over a length of the quad cable;
b. a second pair of differential conductors arranged parallel to each other over the length of the quad cable;
c. an inner braided shield formed around the first and second pair of differential conductors;
d. an outer braided shield formed around the first and second pair of differential conductors and the inner braided shield; and
e. a jacket formed around the outer braided shield. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28)
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29. An IEEE 1394 system with a quad cable having a length greater than 4.5 meters, the cable comprising:
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a. a first pair of differential conductors arranged parallel to each other over a length of the quad cable for carrying differential signals between IEEE 1394 devices; and
b. a second pair of differential conductors arranged parallel to each other over the length of the cable for carrying differential signals between IEEE 1394 devices;
wherein, each differential conductor from the first pair of differential conductors are positioned opposite of each other through a center of the cable and each differential conductor from the second pair of differential conductors are positioned opposite of each other through the center of the cable. - View Dependent Claims (30, 31, 32, 33, 34, 35)
a. an inner braided shield;
b. an outer braided shield; and
c. a shield separator positioned between the inner braided shield and the outer braided shield for providing electrical separation.
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31. The IEEE 1394 s stem of claim 30, further comprising a receiver connector comprising a connector housing, wherein the inner braided shield and the outer braided shield are coupled to ground through the connector housing.
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32. The IEEE 1394 system of claim 31, wherein the receiver connector further comprises a capacitor through which the inner braided shield and the outer braided shield are AC coupled.
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33. The IEEE 1394 system of claim 30, further comprising receiving pins attached to each differential conductor of the first pair of differential conductors and the second pair of differential conductors for providing a connection of the cable to an IEEE 1394 Serial Bus.
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34. The IEEE 1394 system of claim 30, wherein the shield separator comprises aluminum.
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35. The IEEE 1394 system of claim 34, wherein the shield separator comprises an aluminum layer.
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36. An IEEE 1394 standard compliant cable having a length greater than 4.5 meters comprising:
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a. a first pair of wires for carrying a first differential signal, wherein the first pair of wires comprise a wire of a diameter of at least 26 American Wire Gauge;
b. a second pair of wires for carrying a second differential signal, wherein the second pair of wires comprise a wire of a diameter of at least 26 American Wire Gauge;
c. a first internal braided shield formed around the first and the second pair of wires;
d. a second internal braided shield formed around the first internal braided shield;
e. a separator layer between the first and the second internal braided shield; and
f. a flame retardant jacket formed around the second internal braided shield. - View Dependent Claims (37, 38, 39)
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Specification