Patents by Inventor AbdelHakim Salem Alhussien

AbdelHakim Salem Alhussien 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).

  • Read threshold voltage adaptation using bit error rates based on decoded data
    Patent number: 9818488
    Abstract: A read threshold voltage for a memory is adjusted based on a bit error rate based on decoded data for a plurality of read threshold voltages. The read threshold voltage can be adjusted by reading the memory at a current read threshold voltage to obtain a read value; applying a hard decision decoder to the read value; determining if the hard decision decoder converges for the read value to a converged word; storing bits corresponding to the converged word as reference bits and, if the hard decision decoder converges, (i) computing a bit error rate for the current read threshold voltage based on the reference bits; (ii) adjusting the current read reference voltage to a new read threshold voltage; and (iii) reading the memory at the new read threshold voltage to obtain a new read value, until a threshold is satisfied; and once the threshold is satisfied, selecting the read threshold voltage based on the bit error rates.
    Type: Grant
    Filed: October 30, 2015
    Date of Patent: November 14, 2017
    Assignee: Seagate Technology LLC
    Inventors: Sundararajan Sankaranarayanan, AbdelHakim Salem Alhussien, Zhengang Chen, Erich F. Haratsch
  • READ THRESHOLD VOLTAGE ADAPTATION USING BIT ERROR RATES BASED ON DECODED DATA
    Publication number: 20170125111
    Abstract: A read threshold voltage for a memory is adjusted based on a bit error rate based on decoded data for a plurality of read threshold voltages. The read threshold voltage can be adjusted by reading the memory at a current read threshold voltage to obtain a read value; applying a hard decision decoder to the read value; determining if the hard decision decoder converges for the read value to a converged word; storing bits corresponding to the converged word as reference bits and, if the hard decision decoder converges, (i) computing a bit error rate for the current read threshold voltage based on the reference bits; (ii) adjusting the current read reference voltage to a new read threshold voltage; and (iii) reading the memory at the new read threshold voltage to obtain a new read value, until a threshold is satisfied; and once the threshold is satisfied, selecting the read threshold voltage based on the bit error rates.
    Type: Application
    Filed: October 30, 2015
    Publication date: May 4, 2017
    Applicant: Seagate Technology LLC
    Inventors: Sundararajan Sankaranarayanan, AbdelHakim Salem Alhussien, Zhengang Chen, Erich F. Haratsch