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Skew adjusted data cable

  • US 7,271,343 B2
  • Filed: 02/01/2006
  • Issued: 09/18/2007
  • Est. Priority Date: 07/28/2003
  • Status: Active Grant
First Claim
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1. A cable having a specified characteristic impedance comprising:

  • a plurality of twisted pairs of insulated conductors designated into a first group of twisted pairs and a second group of twisted pairs;

    wherein each twisted pair in the first group of twisted pairs has a first twist lay, a first insulation thickness and a first nominal impedance;

    wherein each twisted pair in the second group of twisted pairs has a second twist lay, a second insulation thickness and a second nominal impedance; and

    wherein a first combination of the first twist lay and the first insulation thickness, and a second combination of the second twist lay and the second insulation thickness are selected such that a difference between the first nominal impedance and the specified characteristic impedance of the cable is greater than about 2 Ohms and less than about 15 Ohms, and a difference between the second nominal impedance and the specified characteristic impedance of the cable is greater than about 2 Ohms and less than about 15 Ohms; and

    wherein the cable has a skew of less than approximately 25 ns per 100 m.

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