Patents by Inventor Takesi Adachi

Takesi Adachi 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).

  • Patent number: 4814874
    Abstract: A first surface acoustic wave (SAW) filter has flat characteristics with a pass band which corresponds to a frequency ranging from a picture intermediate frequency to a sound intermediate frequency of the B/G system. A second SAW filter has double-humped characteristics which have pass bands near a sound intermediate frequency in the VHF high-band and UHF band of the L system, and near a sound intermediate frequency in the VHF low-band of the L system. When a tuned frequency of a video tank circuit is switched to a frequency ranging between the picture intermediate frequency of the B/G system and the picture intermediate frequency in the VHF low-band of the L system, a video IC obtains either picture and sound demodulation outputs of the B/G system or a picture demodulation output of the L system from the output of the first SAW filter.
    Type: Grant
    Filed: March 25, 1988
    Date of Patent: March 21, 1989
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Takesi Adachi