Patents by Inventor Eric J. Tree

Eric J. Tree 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 providing a read channel having imbedded channel signal analysis
    Patent number: 7245444
    Abstract: A method and apparatus for providing a read channel having imbedded channel signal analysis is disclosed. The method and apparatus disclosed determines the types of noise present in a read signal and separates different noises out of the read signal. A signal is read from a storage medium and a written signal is removed from the read signal to produce a noise residue signal. The noise residue signal is converted to a power residue signal. The power residue signal is correlated with a Pseudo Random Bit Sequences (PRBS) sequence used to generate the written signal to produce a deconvolved signal. The deconvolved signal is accumulated.
    Type: Grant
    Filed: March 31, 2005
    Date of Patent: July 17, 2007
    Assignee: Hitachi Global Storage Technologies Netherlands B.V.
    Inventors: Richard L. Galbraith, Travis R. Oenning, Eric J. Tree, Bruce A. Wilson