Patents by Inventor Hirohide Niimi

Hirohide Niimi 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).

  • Channel search and selection system for television receiver
    Patent number: 4361908
    Abstract: A channel search and selection system for a televison receiver, using a voltage synthesizer system, comprises a channel selection voltage generator for producing a continuously changing control voltage, an electronic tuner which receives this control voltage and a television signal of a channel corresponding to the control voltage to convert the television signal to an intermediate frequency signal, an amplifier for receiving and amplifying the intermediate frequency signal, and a frequency discriminator for receiving the amplified intermediate frequency signal and producing an output voltage according to the degree of deviation of the intermediate frequency signal from a predetermined frequency. This output voltage is fed to the channel selection voltage generator circuit for controlling the control voltage.
    Type: Grant
    Filed: December 8, 1980
    Date of Patent: November 30, 1982
    Assignee: Hitachi, Ltd.
    Inventor: Hirohide Niimi