Patents by Inventor Yoshio Onigata

Yoshio Onigata 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).

  • Tracking error correction for optical head in different modes of operation
    Patent number: 5508991
    Abstract: An offset pulse having a polarity opposite to that of a large tracking error pulse that occurs in response to an operation mode changeover is added to a tracking error signal. The offset pulse has a duration starting immediately before the operation mode changeover and partially overlaps with the tracking error pulse. The offset pulse is generated so as to rise at a timing that is determined based on a wobble signal extracted from the tracking error signal.
    Type: Grant
    Filed: June 9, 1994
    Date of Patent: April 16, 1996
    Assignee: Pioneer Electronic Corporation
    Inventors: Yoshio Onigata, Hiroaki Tsuboi
  • Apparatus for maintaining rotational speed in disk reproducing device
    Patent number: 4390977
    Abstract: In a disc reading device wherein the rotating speed is normally controlled by detecting the synchronizing signal part of a reproduced signal, a second speed control circuit is included for measuring the speed of the disc and controlling the speed to a desired value independently of the detected synchronizing signals. When signal drop-out or the like occurs, the second speed control circuit takes over.
    Type: Grant
    Filed: November 13, 1981
    Date of Patent: June 28, 1983
    Assignee: Universal Pioneer Corporation
    Inventors: Yoshio Onigata, Tsutomu Fukui, Kazuo Yajika