Patents by Inventor Yasuo Chito

Yasuo Chito 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).

  • Information reproducing apparatus having a timer for restricting operation thereof and means for overriding said timer when the information reproducing apparatus is operatively coupled to a reproduced information handling apparatus
    Patent number: 4914534
    Abstract: The disclosed information reproducing apparatus reproduces information recorded on a record medium. A timer system restricts the reproducing operation of the apparatus to a predetermined period of time and a control facility controls the timer system on the basis of the coupled state or operating state of a reproduced information handling apparatus arranged to handle reproduced information.
    Type: Grant
    Filed: December 23, 1987
    Date of Patent: April 3, 1990
    Assignee: Canon Kabushiki Kaisha
    Inventor: Yasuo Chito
  • Rotation phase control device
    Patent number: 4695778
    Abstract: A rotation phase control device which synchronizes the rotation phase of the rotor of a motor with a reference signal and which has a steady-state characteristic compensating circuit improves the starting characteristic of the motor by compensating characteristic control apparatus for varying the compensating characteristic of the compensating circuit based on whether or not the rotation phase of the rotor is within a predetermined synchronization range relative to the reference signal.
    Type: Grant
    Filed: January 22, 1985
    Date of Patent: September 22, 1987
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yasuo Chito, Masahiko Ogawa
  • Saw-tooth wave generating circuit
    Patent number: 4626702
    Abstract: A saw-tooth wave generating circuit is formed by providing a constant current source with negative feedback through an operational amplifier. The operational amplifier compares a reference voltage with the voltage across a resistor through which a current of the constant current source is flowing, to produce a control voltage for the constant current source. The saw-tooth wave is generated across a capacitor which is charged by the constant current source and is discharged through a transistor which receives a periodic pulse signal.
    Type: Grant
    Filed: November 27, 1984
    Date of Patent: December 2, 1986
    Assignee: Canon Kabushiki Kaisha
    Inventor: Yasuo Chito