Patents by Inventor Sonneville, Pierre R.

Sonneville, Pierre R. 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).

  • Patent number: 5031166
    Abstract: An optical disk recording system including a record medium is disclosed for providing an accurate track crossing count and an accurate track following signal. A first embodiment utilizes off-centered wobbled areas located in the headers of the record medium. The high frequency content of a first signal is combined with the low frequency content of a second signal, which is generated using the wobbled areas. In another embodiment, light-reflective discontinuities are provided in the header areas of the record medium. A qualifier and an AGC are utilized in providing a corrected track following signal. In still another embodiment, reflective discontinuities are located in the servo areas of the record medium. In such an embodiment, it is preferred that there be a fixed gain adjustment to a radial push-pull signal.
    Type: Grant
    Filed: September 21, 1989
    Date of Patent: July 9, 1991
    Assignee: Laser Magnetic Storage International Company
    Inventors: Kurt W. Getreuer, Johannes J. Verboom, Sonneville, Pierre R.