Patents by Inventor Gerrit Groot Hulze

Gerrit Groot Hulze 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).

  • FM radio receiver
    Patent number: 8185082
    Abstract: A diversity FM radio receiver comprises two tuners for simultaneously tuning to the same FM channel. To avoid disturbances between the local oscillator signals of the tuners and to be able to use standard IF filters, one of the tuners operate with high-side LO injection and the other tuner operates with low-side LO-injection. To equalize the frequencies of the signals to be subjected to the diversity operation the two IF-signals of the tuners are fed to complex mixers with oppositely rotating phases.
    Type: Grant
    Filed: January 22, 2007
    Date of Patent: May 22, 2012
    Assignee: NXP B.V.
    Inventors: Pieter Meijer, Gerrit Groot Hulze, Jacobus C. Sandee
  • FM RADIO RECEIVER
    Publication number: 20090023412
    Abstract: A diversity FM radio receiver comprises two tuners for simultaneously tuning to the same FM channel. To avoid disturbances between the local oscillator signals of the tuners and to be able to use standard IF filters, one of the tuners operate with high-side LO injection and the other tuner operates with low-side LO-injection. To equalize the frequencies of the signals to be subjected to the diversity operation the two IF-signals of the tuners are fed to complex mixers with oppositely rotating phases.
    Type: Application
    Filed: January 22, 2007
    Publication date: January 22, 2009
    Applicant: NXP B.V.
    Inventors: Pieter Meijer, Gerrit Groot Hulze, Jacobus C. Sandee