High speed data cable using an outer braid to carry a signal
A high speed data cable carries high-speed and auxiliary signals, and includes a raw cable. The raw cable includes coaxial lines which are covered by an outer conductive shield. High-speed signals are carried on the inner conductors of a pair of coaxial lines. Lower speed signals are carried on the galvanically or capacitively coupled shields of a pair of coaxial lines, and/or the outer conductive shield.
1. A method of manufacturing a cable for carrying one or more high-speed differential data signals and one or more auxiliary signals between a source device and a sink device, comprising;
electrically connecting first and second input wires of a dual-shielded cable element adapted to carry high-speed differential data signals with first and second high-speed signal input terminals in an input connector;
electrically connecting first and second output wires of the dual-shielded cable element with first and second high-speed signal output terminals in an output connector; and
electrically connecting an outer conductive shield with a first auxiliary signal input terminal in the input connector and with a first auxiliary signal output terminal in the output connector.
2. The method of claim 1 , wherein the outer conductive shield includes a metallic braid enclosing at least the dual-shielded cable element.
3. The method of claim 1 , wherein the dual shielded cable element is a split dual shielded cable element.
4. The method of claim 3 , further comprising:
mounting a coupling capacitor in the input connector between a first conductive shield of the split dual-shielded cable element and a second conductive shield of the split dual-shielded cable element.
5. The method of claim 4 , wherein the first and the second conductive shields are electrically coupled with respectively power and ground input terminals in the input connector and with respectively power and ground output terminals in the output connector, and wherein the split dual-shielded cable element is adapted to carry a power supply voltage and a ground reference between the source device and the sink device.
6. The method of claim 1 , further comprising:
connecting the outer conductive shield enclosing the dual-shielded cable element with a grounded input connector shell via a first capacitor; and
connecting the outer conductive shield with a grounded output connector shell via a second capacitor.
7. The method of claim 1 , wherein:
the outer conductive shield is adapted to carry a hot plug detect (HPD) signal between the source device and the sink device.
8. The method of claim 1 , further comprising:
electrically coupling the first auxiliary signal input terminal with a ground input terminal in the input connector via a third capacitor.
9. The method of claim 1 , further comprising:
electrically coupling the first auxiliary signal output terminal with a ground output terminal in the output connector via a fourth capacitor.
10. The method of claim 1 , further comprising:
inserting a resistor between the outer conductive shield and the first auxiliary signal input terminal; and
inserting a resistor between the outer conductive shield and the first auxiliary signal output terminal.
11. The method of claim 1 , further comprising:
electrically coupling first and second input wires of a dual-shielded cable element adapted to carry high-speed differential data signals with third and fourth high-speed signal input terminals in the input connector;
electrically coupling first and second output wires of the dual-shielded cable element with third and fourth high-speed signal output terminals in the output connector; and
electrically coupling a joined conductive shield of the dual-shielded cable element, adapted to carry a second auxiliary signal between the source device and the sink device, with a second auxiliary signal input terminal in the input connector and with a second auxiliary signal output terminal in the output connector.
12. The method of claim 1 , wherein:
the cable is adapted to be compliant with an HDMI standard.
13. The method of claim 1 , wherein:
the cable is adapted to be compliant with a DisplayPort standard.