Patents by Inventor Shizuo Ida

Shizuo Ida 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).

  • Head driver
    Patent number: 5067032
    Abstract: A charging/discharging circuit charges a capacitor in response to a first level of a control signal, while discharging the capacitor in response to a second level. A voltage-current conversion circuit converts charging voltage of the capacitor into current which is responsive to the level of the charging voltage. A current supply circuit supplies output current from the voltage-current conversion circuit to a coil head. Thus, no abrupt change is caused in current flowing through the coil head in switching of the control signal.
    Type: Grant
    Filed: May 17, 1989
    Date of Patent: November 19, 1991
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventor: Shizuo Ida