Patents by Inventor Edmun C. Seng

Edmun C. Seng 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).

  • Track mis-registration measurement for a disc drive
    Patent number: 6771441
    Abstract: An apparatus and method of predicting functional capability of a data storage device having a plurality of information tracks, comprising performing a DC erase on three adjacent information tracks, writing a predetermined bit pattern on a middle track of the three adjacent information tracks, providing a first signal from the bit pattern to a variable gain amplifier to generate a first value of the variable gain amplifier, performing DC erases on the information tracks adjacent the middle track, reading the bit pattern from the middle track to provide a second signal to the variable gain amplifier to generate a second value of the variable gain amplifier, and operating on the first and second values of the variable gain amplifier to provide a track mis-registration value for use with a predetermined threshold value to determine the functional capability of the data storage device.
    Type: Grant
    Filed: December 21, 2001
    Date of Patent: August 3, 2004
    Assignee: Seagate Technology LLC
    Inventors: KayHee Tang, Xiong Liu, Aik Chuan Lim, Edmun C. Seng, UttHeng Kan, ChoonKiat Lim
  • Track mis-registration measurement for a disc drive
    Publication number: 20030030928
    Abstract: An apparatus and method of predicting functional capability of a data storage device having a plurality of information tracks, comprising performing a DC erase on three adjacent information tracks, writing a predetermined bit pattern on a middle track of the three adjacent information tracks, providing a first signal from the bit pattern to a variable gain amplifier to generate a first value of the variable gain amplifier, performing DC erases on the information tracks adjacent the middle track, reading the bit pattern from the middle track to provide a second signal to the variable gain amplifier to generate a second value of the variable gain amplifier, and operating on the first and second values of the variable gain amplifier to provide a track mis-registration value for use with a predetermined threshold value to determine the functional capability of the data storage device.
    Type: Application
    Filed: December 21, 2001
    Publication date: February 13, 2003
    Applicant: Seagate Technology LLC
    Inventors: KayHee Tang, Xiong Liu, Aik Chuan Lim, Edmun C. Seng, UttHeng Kan, ChoonKiat Lim