Patents by Inventor Nobuaki Matuo

Nobuaki Matuo 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).

  • High frequency dual band output oscillator
    Patent number: 6566969
    Abstract: A voltage control oscillator used in mobile communication systems such as cellular phones and video machines. An oscillation output of the first output oscillation circuits (1a) enters a broad band buffer amplifier circuit (4) through a stage-to-stage coupling capacitor (22) and an oscillation output of the second output oscillation circuit (1b) enters the broad band buffer amplifier circuit (4) through frequency selective filters (3a, 3b) and the stage-to-stage coupling capacitor (22). On/off operation of a control voltage of a switch terminal (2) installed on the first or second output oscillation circuit outputs selectively an oscillation signal from the first or second output oscillation circuit.
    Type: Grant
    Filed: September 13, 2001
    Date of Patent: May 20, 2003
    Assignee: Fujitsu Media Devices Limited
    Inventors: Nobuaki Matuo, Alejandro Puel
  • HIGH FREQUENCY DUAL BAND OUTPUT OSCILLATOR
    Publication number: 20030067363
    Abstract: A voltage control oscillator used in mobile communication systems such as cellular phones and video machines. An oscillation output of the first output oscillation circuit (1b) enters a broad band buffer amplifier circuit (4) through a stage-to-stage coupling capacitor (22) and an oscillation output of the second output oscillation circuit (1b) enters the broad band buffer amplifier circuit (4) through frequency selective filters (3a, 3b) and the stage-to-stage coupling capacitor (22). On/off operation of a control voltage of a switch terminal (2) installed on the first or second output oscillation circuit outputs selectively an oscillation signal from the first or second output oscillation circuit.
    Type: Application
    Filed: September 13, 2001
    Publication date: April 10, 2003
    Inventors: Nobuaki Matuo, Alejandro Puel