Patents by Inventor Mitsumasa Yoda

Mitsumasa Yoda 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).

  • Television tuner suitable for demodulation of both analog signals and digital signals
    Patent number: 7123309
    Abstract: There are provided a mixer for subjecting entered digital television signals or analog television signals to frequency conversion into an intermediate frequency band and an intermediate frequency tuning circuit so configured as to enable tuning frequency to be switched in the intermediate frequency band and provided at a stage immediately following the mixer, and the intermediate frequency tuning circuit is tuned to a first frequency substantially at a center of the intermediate frequency band when digital television signals are entered into the mixer or to a second frequency, which is higher than the first frequency when analog television signals are entered.
    Type: Grant
    Filed: July 7, 2003
    Date of Patent: October 17, 2006
    Assignee: Alps Electric Co., Ltd.
    Inventor: Mitsumasa Yoda
  • Television tuner suitable for demodulation of both analog signals and digital signals
    Publication number: 20040105035
    Abstract: There are provided a mixer for subjecting entered digital television signals or analog television signals to frequency conversion into an intermediate frequency band and an intermediate frequency tuning circuit so configured as to enable tuning frequency to be switched in the intermediate frequency band and provided at a stage immediately following the mixer, and the intermediate frequency tuning circuit is tuned to a first frequency substantially at a center of the intermediate frequency band when digital television signals are entered into. the mixer or to a second frequency, which is higher than the first frequency when analog television signals are entered.
    Type: Application
    Filed: July 7, 2003
    Publication date: June 3, 2004
    Applicant: Alps Electric Co., Ltd.
    Inventor: Mitsumasa Yoda