Patents by Inventor Joseph P. Tatman

Joseph P. Tatman 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).

  • Method and apparatus for detecting wobble defects in optical recording system
    Patent number: 8526279
    Abstract: Aspects of the disclosure provide an apparatus. The apparatus includes a pick-up unit, such as an optical pick-up unit, a wobble channel and a defect detector. The pick-up unit generates a push-pull signal corresponding to a wobbled track of a storage medium. The wobble channel includes circuits to receive the push-pull signal, obtain a wobble signal from the push-pull signal, and calculate a wobble amplitude metric based on the wobble signal. The defect detector compares the wobble amplitude metric to a threshold to detect wobble defects.
    Type: Grant
    Filed: November 15, 2012
    Date of Patent: September 3, 2013
    Assignee: Marvell International Ltd.
    Inventors: Mats Oberg, Joseph P. Tatman
  • Method and apparatus for detecting wobble defects in optical recording system
    Patent number: 8315136
    Abstract: Aspects of the disclosure provide an apparatus. The apparatus includes a pick-up unit, such as an optical pick-up unit, a wobble channel and a defect detector. The pick-up unit generates a push-pull signal corresponding to a wobbled track of a storage medium. The wobble channel includes circuits to receive the push-pull signal, obtain a wobble signal from the push-pull signal, and calculate a wobble amplitude metric based on the wobble signal. The defect detector compares the wobble amplitude metric to a threshold to detect wobble defects.
    Type: Grant
    Filed: December 5, 2011
    Date of Patent: November 20, 2012
    Assignee: Marvell International Ltd.
    Inventors: Mats Oberg, Joseph P. Tatman
  • Method and apparatus for detecting wobble defects in optical recording system
    Patent number: 8072854
    Abstract: Aspects of the disclosure provide an apparatus. The apparatus includes a pick-up unit, such as an optical pick-up unit, a wobble channel and a defect detector. The pick-up unit generates a push-pull signal corresponding to a wobbled track of a storage medium. The wobble channel includes circuits to receive the push-pull signal, obtain a wobble signal from the push-pull signal, and calculate a wobble amplitude metric based on the wobble signal. The defect detector compares the wobble amplitude metric to a threshold to detect wobble defects.
    Type: Grant
    Filed: February 26, 2010
    Date of Patent: December 6, 2011
    Assignee: Marvell International, Ltd.
    Inventors: Mats Oberg, Joseph P. Tatman