Patents by Inventor Noriaki Yokota

Noriaki Yokota 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).

  • Quick response optical disk system providing accurate displacement of a pick-up and method therefor
    Patent number: 5751673
    Abstract: A quick-response optical disk system corrects signals from photodiodes through a differential amplifier to a tracking error signal TE that is further converted to a tracking drive signal TRD and a slide driving signal SLD by a tracking control circuit. The signal TRD through a driving circuit effects a tracking actuator. The signal TRD is also converted to a signal TRDFS by a low-pass filter. The signals SLD and TRDFS are sent through a selector to a microcomputer which drives a slide motor through a slide driving circuit according to the signals SLD and TRDFS.
    Type: Grant
    Filed: January 17, 1996
    Date of Patent: May 12, 1998
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Noriaki Yokota, Kouji Okamura