Patents by Inventor Ralph J. Hilla, Jr.

Ralph J. Hilla, Jr. 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).

  • System for improving accuracy of servo pattern timing reference in a disc drive
    Patent number: 6775083
    Abstract: It is generally believed that, the more pure the servo pattern timing reference, the better. A system writes a servo clock track on a disc in a disc drive. The clock track is written on the disc and the servo system is configured to reduce a splice error in a timing signal based on the clock track. The system is also configured to reduce phase-locked oscillator (PLO) jitter in the timing signal. In one embodiment, the splice error and PLO jitter are both measured using a single phase measurement circuit.
    Type: Grant
    Filed: November 26, 2001
    Date of Patent: August 10, 2004
    Assignee: Seagate Technology LLC
    Inventors: Ralph J. Hilla, Jr., Michael A. Zenner