Patents by Inventor Gary D. Grubbs

Gary D. Grubbs 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).

  • Using a first IF of 43.5 MHZ or less in an FM radio in a television tuner
    Patent number: 5146337
    Abstract: A television receiver includes a single tuner for tuning both television channels and broadcast FM stations. The tuner is operated at a fixed gain setting in FM reception mode. The tuner serves as the first conversion stage of a double conversion FM receiver, wherein the mixer of an FM radio integrated circuit serves as the second conversion stage. The arrangement operates at a specific and non-arbitrary first IF frequency. The FM receiver is also capable of automatically receiving National Weather Service broadcasts on that one of NWS's seven allocated frequencies which is operating in a listener's area. The receiver provides an on-screen display of the currently tuned FM channel number.
    Type: Grant
    Filed: August 6, 1990
    Date of Patent: September 8, 1992
    Assignee: Thomson Consumer Electronics, Inc
    Inventor: Gary D. Grubbs
  • First IF filter with fixed second half-IF trap for use in an FM radio in a television reciever
    Patent number: 5142369
    Abstract: A television receiver includes a single tuner for tuning both television channels and broadcast FM stations. The tuner is operated at a fixed gain setting in FM reception mode. The tuner serves as the first conversion stage of a double conversion FM receiver, wherein the mixer of an FM radio integrated circuit serves as the second conversion stage. The arrangement operates at a specific and non-arbitrary first IF frequency. The FM receiver is also capable of automatically receiving National Weather Service broadcasts on that one of NWS's seven allocated frequencies which is operating in a listener's area. The receiver provides an on-screen display of the currently tuned FM channel number.
    Type: Grant
    Filed: August 6, 1990
    Date of Patent: August 25, 1992
    Assignee: Thomson Consumer Electronics, Inc.
    Inventors: Gary D. Grubbs, Leroy S. Wignot