Patents by Inventor Bill Foland

Bill Foland 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).

  • Synchronous read channel employing discrete timing recovery, transition detector, and sequence detector
    Patent number: 5812334
    Abstract: A synchronous read channel having a single chip integrated circuit digital portion which provides digital gain control, timing recovery, equalization, digital peak detection, sequence detection, RLL(1,7) encoding and decoding, error-tolerant synchronization and channel quality measurement is disclosed. The integrated circuit accommodates both center sampling and side sampling, and has a high degree of programmability of various pulse shaping and recovery parameters and the ability to provide decoded data using sequence detection or digital peak detection. These characteristics, together with the error-tolerant sync mark detection and the ability to recover data when the sync mark is obliterated, allow a wide variety of retry and recovery strategies to maximize the possibility of data recovery.
    Type: Grant
    Filed: March 16, 1994
    Date of Patent: September 22, 1998
    Assignee: Cirrus Logic, Inc.
    Inventors: Richard T. Behrens, Kent D. Anderson, Alan Armstrong, Trent Dudley, Bill Foland, Neal Glover, Larry King
  • Synchronous read channel
    Patent number: 5424881
    Abstract: A synchronous read channel having a single chip integrated circuit digital portion which provides digital gain control, timing recovery, equalization, digital peak detection, sequence detection, RLL(1,7) encoding and decoding, error-tolerant synchronization and channel quality measurement is disclosed. The integrated circuit accommodates both center sampling and side sampling, and has a high degree of programmability of various pulse shaping and recovery parameters and the ability to provide decoded data using sequence detection or digital peak detection. These characteristics, together with the error-tolerant sync mark detection and the ability to recover data when the sync mark is obliterated, allow a wide variety of retry and recovery strategies to maximize the possibility of data recovery.
    Type: Grant
    Filed: February 1, 1993
    Date of Patent: June 13, 1995
    Assignee: Cirrus Logic, Inc.
    Inventors: Richard T. Behrens, Kent D. Anderson, Alan Armstrong, Trent Dudley, Bill Foland, Neal Glover, Larry King