Patents Represented by Attorney Christopher Lynt
  • Patent number: 6043942
    Abstract: A method and apparatus for write precompensation in a direct access storage device are provided. A data write encoder generates a data signal to be written. A write precompensation delay circuit is coupled to the data encoder for receiving and delaying the data signal. The write precompensation delay circuit includes a first delay path and a second delay path in parallel with the first delay path. The first delay path and the second delay path have different delay values. In one arrangement, both the first delay path and the second delay path include a plurality of delay cells connected together in a chain. The delay cells of the first delay path have a first predetermined delay value and the delay cells of the second delay path have a second predetermined delay value. A ratio of the second predetermined delay value to the first predetermined value is set equal to one of approximately 3/2, 4/3, 5/4, 6/5, or 7/6.
    Type: Grant
    Filed: October 9, 1997
    Date of Patent: March 28, 2000
    Assignee: International Business Machines Corporation
    Inventors: Earl Albert Cunningham, Peter J. Windler