Patents by Inventor Minoru Ogita

Minoru Ogita 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).

  • Pilot signal extracting circuitry
    Patent number: 4002991
    Abstract: A pilot signal extracting circuitry designed to extract, from a composite signal consisting of plural signals modulated by a suppressed carrier modulation system, a pilot signal for controlling the generation of a carrierwave which is used for the demodulation of the composite signal.The pilot signal extracting circuitry comprises: a circuit for generating a signal synchronous with the pilot signal contained in the composite signal; a synchronous detector circuit for receiving, as the inputs, the composite signal and the synchronous signal, and for thereby generating a DC voltage having an value proportional to the level of the pilot signal contained in the composite signal; and a pulse-forming circuit for receiving, as the inputs, the DC voltage and the synchronous signal, and for thereby forming a pulse, i.e. the extracted pilot signal, which is synchronous with the synchronous signal and which has an amplitude proportional to the value of the DC voltage.
    Type: Grant
    Filed: January 2, 1976
    Date of Patent: January 11, 1977
    Assignee: Nippon Gakki Seizo Kabushiki Kaisha
    Inventor: Minoru Ogita
  • Ceramic filter circuit
    Patent number: 3939442
    Abstract: Reactance networks are connected just before and just after the ceramic filter element to adjust the linearity of the phase characteristic thereof, thereby reducing distortion.
    Type: Grant
    Filed: August 23, 1973
    Date of Patent: February 17, 1976
    Assignee: Nippon Gakki Seizo Kabushiki Kaisha
    Inventor: Minoru Ogita