Cable apparatus for minimizing skew delay of analog signals and cross-talk from digital signals and method of making same
First Claim
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1. A cable comprising:
- a plurality of first twisted pairs of conductors having a first lay direction and a first lay length, wherein said plurality of first twisted pairs are twisted together in said first lay direction to form a bundle, wherein said plurality comprises at least three; and
a second twisted pair of conductors having a second lay direction and a second lay length, wherein said second lay direction is opposite to said first lay direction and wherein said second lay length is different than said first lay length; and
an outer jacket encompassing said bundle and said second twisted pair, wherein said second twisted pair is laid in parallel and not twisted together with said bundle.
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Abstract
An unshielded twisted pair (UTP) cable having a common electrical length among a plurality of twisted pairs for carrying analog signals and a different lay length and lay direction to an additional twisted pair for carrying digital signals is disclosed. The twisted pairs for carrying the analog signals may be bundled together, with the twisted pair for carrying the digital signal placed alongside the bundled pairs during the final jacketing process, during which the outer insulator is formed around all of the pairs. The bundled pairs may be used for the transmission of analog video signals (e.g., R, G and B), with the remaining pair used for transmission of digital control or digital audio signals.
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Citations
20 Claims
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1. A cable comprising:
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a plurality of first twisted pairs of conductors having a first lay direction and a first lay length, wherein said plurality of first twisted pairs are twisted together in said first lay direction to form a bundle, wherein said plurality comprises at least three; and a second twisted pair of conductors having a second lay direction and a second lay length, wherein said second lay direction is opposite to said first lay direction and wherein said second lay length is different than said first lay length; and an outer jacket encompassing said bundle and said second twisted pair, wherein said second twisted pair is laid in parallel and not twisted together with said bundle. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A UTP cable comprising:
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a bundle of twisted pairs, said bundle comprising; a first twisted pair; a second twisted pair; and a third twisted pair; wherein said first twisted pair, said second twisted pair and said third twisted pair have a common lay length and a common lay direction, and are twisted together in said common lay direction to form said bundle; a fourth twisted pair laid in parallel with and outside a perimeter of said bundle, said fourth twisted pair having a lay length different from said common lay length and a lay direction opposite to said common lay direction. - View Dependent Claims (11, 12, 13)
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14. A method for making a cable comprising:
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twisting together a plurality of twisted pairs into a bundle in a first common lay direction, each of said plurality of twisted pairs having said common lay direction and a common lay length; laying an additional twisted pair in parallel with said bundle, said additional twisted pair having a second lay direction that is opposite to said common lay direction and a second lay length that differs from said common lay length; encompassing said bundle and said additional twisted pair in an outer jacket. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification