Patents by Inventor Dmitry Varsanofiev

Dmitry Varsanofiev 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).

  • Histograms of processed noise samples for measuring error rate of a PRML data detection channel
    Patent number: 5490091
    Abstract: A method and apparatus for measuring the error rate of a magnetic recording device, such as a hard disk storing a set of data. The apparatus has a partial response maximum likelihood data detecting channel (PRML channel) which differs from a conventional PRML channel by including a noise processing unit (66) which is connected between the output of an A/D converter (54) and the input of a sequence detector (60), and a histogrammer (70), which is connected to the output of a noise processing unit. The method consists of estimating a sequence of noise samples received from the output of the A/D converter (54), processing the sequence of noise samples according to a plurality of predetermined sets of processing coefficients, accumulating a plurality of histograms of segregated processed noise samples, and processing the plurality of histograms so as to determine a dependence of a number of errors on a preselected criterion which characterizes a signal-to-noise ratio of the PRML channel.
    Type: Grant
    Filed: March 1, 1994
    Date of Patent: February 6, 1996
    Assignee: Guzik Technical Enterprises, Inc.
    Inventors: Andrew Kogan, Alexander Taratorin, Alexander Tesler, Dmitry Varsanofiev