Patents by Inventor Gilbert E. Russell

Gilbert E. Russell 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).

  • Digital color modulator
    Patent number: 4464676
    Abstract: An interface circuit for converting a digital signal representing a dot-by-dot color video signal into a NTSC signal compatible with a television antenna input precompensates the digital for limitations in typical NTSC receivers. Various methods and circuits for precompensating the luminance amplitude, chrominance and chrominance amplitude content of the digital signal result in perceivably improved contrast and color purity.
    Type: Grant
    Filed: August 3, 1982
    Date of Patent: August 7, 1984
    Assignee: National Semiconductor Corporation
    Inventors: Gilbert E. Russell, Hee Wong
  • Digital color modulator
    Patent number: 4419689
    Abstract: An interface circuit for converting a digital signal representing a dot-by-dot color video signal into a NTSC signal compatible with a television antenna input precompensates the digital for limitations in typical NTSC receivers. Various methods and circuits for precompensating the luminance amplitude, chrominance and chrominance amplitude content of the digital signal result in perceivably improved contrast and color purity.
    Type: Grant
    Filed: August 3, 1982
    Date of Patent: December 6, 1983
    Assignee: National Semiconductor Corporation
    Inventors: Gilbert E. Russell, Hee Wong
  • Digital color modulator
    Patent number: 4390893
    Abstract: An interface circuit for converting a digital signal representing a dot-by-dot color video signal into a NTSC signal compatible with a television antenna input precompensates the digital for limitations in typical NTSC receivers. Various methods and circuits for precompensating the luminance amplitude, chrominance and chrominance amplitude content of the digital signal result in perceivably improved contrast and color purity.
    Type: Grant
    Filed: December 15, 1980
    Date of Patent: June 28, 1983
    Assignee: National Semiconductor Corporation
    Inventors: Gilbert E. Russell, Hee Wong