Patents by Inventor Vivian Therese Lund

Vivian Therese Lund 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).

  • Methods and filter for isolating upstream ingress noise in a bi-directional cable system
    Patent number: 5742713
    Abstract: An upstream ingress filter (300) for isolating upstream ingress noise on a bi-directional cable system having an upstream band and a downstream band for carrying upstream signals and downstream signals, respectively. The upstream ingress filter (300) includes a DC switching element (310) for changing the DC voltage on the cable system at said cable access unit and a switchable notch filter (340) that switches ON and OFF in response to the DC switching element. The notch filter isolates upstream ingress noise by attenuating upstream signals in the upstream band when the upstream ingress filter is ON. Both the DC switching element (310) and the notch filter (340) are connected in parallel to the cable (301).
    Type: Grant
    Filed: October 23, 1996
    Date of Patent: April 21, 1998
    Assignee: Motorola, Inc.
    Inventors: Stuart Baker Sanders, Vivian Therese Lund
  • Methods and filter for isolating upstream ingress noise in a bi-directional cable system
    Patent number: 5737461
    Abstract: An upstream ingress filter (300) for isolating upstream ingress noise on a bi-directional cable system having an upstream band and a downstream band for carrying upstream signals and downstream signals, respectively. The upstream ingress filter (300) includes a DC switching element (310) for changing the DC voltage on the cable system at said cable access unit and a switchable notch filter (340) that switches ON and OFF in response to the DC switching element. The notch filter isolates upstream ingress noise by attenuating upstream signals in the upstream band when the upstream ingress filter is ON. Both the DC switching element (310) and the notch filter (340) are connected in parallel to the cable (301).
    Type: Grant
    Filed: May 9, 1996
    Date of Patent: April 7, 1998
    Assignee: Motorola, Inc.
    Inventors: Stuart Baker Sanders, Vivian Therese Lund