Patents by Inventor Alexander Stephen

Alexander Stephen has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Determining cable attenuation and loss of signal threshold
    Patent number: 6864689
    Abstract: Attenuation of a pulsed signal traversing a cable is assessed by identifying a pulse in a signal received after traversing the cable and determining first and second reference signal levels in dependence upon characteristics of the pulse. A measurement is made of the slope of the pulse between the first and second reference signal levels (such as 25% and 75% of the peak pulse magnitude), and this measurement is used to determine an indication of the cable attenuation. The cable attenuation may in turn be used to determine a threshold for indicating loss of signal during a measurement operation.
    Type: Grant
    Filed: January 9, 2003
    Date of Patent: March 8, 2005
    Assignee: Agilent Technologies, Inc.
    Inventors: Alexander Stephen, Daya Rasaratnam, Colin Johnstone
  • Determining cable attenuation and loss of signal threshold
    Publication number: 20030137311
    Abstract: Attenuation of a pulsed signal traversing a cable is assessed by identifying a pulse in a signal received after traversing the cable and determining first and second reference signal levels in dependence upon characteristics of the pulse. A measurement is made of the slope of the pulse between the first and second reference signal levels (such as 25% and 75% of the peak pulse magnitude), and this measurement is used to determine an indication of the cable attenuation. The cable attenuation may in turn be used to determine a threshold for indicating loss of signal during a measurement operation.
    Type: Application
    Filed: January 9, 2003
    Publication date: July 24, 2003
    Inventors: Alexander Stephen, Daya Rasaratnam, Colin Johnstone