Patents by Inventor Daniel S. Fisher

Daniel S. Fisher 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).

  • Data sector/servo split generator for a disk drive
    Patent number: 6122121
    Abstract: A data sector/servo split generator is disclosed for a disk drive apparatus implementing a zone bit recording format and having an embedded sector servo system where servo sector fields split at least one data field on a surface of a disk in the disk drive apparatus. A first counter is provided to count an amount of time to the beginning of a data field, and a first signal (SECTOR) is generated to indicate when the beginning of a data field is encountered by a read/write head in the disk drive. A second signal (SPLIT.sub.-- VALID) is generated by the data sector/servo split generator if a next data field after the generation of the SECTOR signal is split by a servo sector field. A second counter counts a predetermined number of data bytes transferred between a surface of a disk in said disk drive apparatus and said disk controller, so that a third signal (SPLIT) is generated, the SPLIT.sub.-- VALID signal is generated, when a servo sector is encountered in a data field by the read/write head.
    Type: Grant
    Filed: December 20, 1996
    Date of Patent: September 19, 2000
    Assignee: Seagate Technology, Inc.
    Inventors: Stanton M. Keeler, Daniel S. Fisher, John A. Mount