Patents by Inventor Michael J. Link

Michael J. Link 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).

  • Patent number: 10446185
    Abstract: Systems, devices, and method for phase slip recovery may include reading a plurality of data portions of a data block and positioning a mask over one or more data portions of the data block. The data portions following the mask may be shifted to provide a masked, reframed data block, and then the data block may be attempted to be decoded, which may be repeated until the data block is decoded.
    Type: Grant
    Filed: September 18, 2017
    Date of Patent: October 15, 2019
    Assignee: Seagate Technology LLC
    Inventors: Richard P. Michel, Michael J. Link, Anand R. Kharpate, Guofang Xu
  • Patent number: 10255931
    Abstract: An apparatus may include a circuit configured to generate a set of first ADC samples based on a first signal associated with a first read head position and a failed segment and to generate a set of second ADC samples based on a second signal associated with a second read head position and the failed segment. The circuit may then generate, by a MISO equalizer, a set of equalized ADC samples based on the set of first ADC samples and the set of second ADC samples.
    Type: Grant
    Filed: March 5, 2018
    Date of Patent: April 9, 2019
    Assignee: Seagate Technology LLC
    Inventors: Jason Charles Jury, Marcus Marrow, Michael J Link, Jason Bellorado
  • Publication number: 20190088286
    Abstract: Systems, devices, and method for phase slip recovery may include reading a plurality of data portions of a data block and positioning a mask over one or more data portions of the data block. The data portions following the mask may be shifted to provide a masked, reframed data block, and then the data block may be attempted to be decoded, which may be repeated until the data block is decoded.
    Type: Application
    Filed: September 18, 2017
    Publication date: March 21, 2019
    Inventors: Richard P. Michel, Michael J. Link, Anand R. Kharpate, Guofang Xu
  • Patent number: 10176828
    Abstract: A tape head is provided for use with a tape drive that is configured to receive a length of tape. The tape head includes a head body including at least one head element for performing read and/or write operations on the tape, and a protective layer extending over at least a portion of the head body for inhibiting wear of the head body when the tape is moved with respect to the head body. Furthermore, the protective layer is made of titanium oxide, chromium oxide, zirconium oxide, aluminum oxide, or zinc oxide.
    Type: Grant
    Filed: July 23, 2018
    Date of Patent: January 8, 2019
    Assignee: Oracle International Corporation
    Inventors: Jianhua Li, Michael J. Link
  • Publication number: 20180350396
    Abstract: A tape head is provided for use with a tape drive that is configured to receive a length of tape. The tape head includes a head body including at least one head element for performing read and/or write operations on the tape, and a protective layer extending over at least a portion of the head body for inhibiting wear of the head body when the tape is moved with respect to the head body. Furthermore, the protective layer is made of titanium oxide, chromium oxide, zirconium oxide, aluminum oxide, or zinc oxide.
    Type: Application
    Filed: July 23, 2018
    Publication date: December 6, 2018
    Applicant: Oracle International Corporation
    Inventors: Jianhua Li, Michael J. Link
  • Patent number: 10056097
    Abstract: A tape head is provided for use with a tape drive that is configured to receive a length of tape. The tape head includes a head body including at least one head element for performing read and/or write operations on the tape, and a protective layer extending over at least a portion of the head body for inhibiting wear of the head body when the tape is moved with respect to the head body. Furthermore, the protective layer is made of titanium oxide, chromium oxide, zirconium oxide, aluminum oxide, or zinc oxide.
    Type: Grant
    Filed: May 2, 2017
    Date of Patent: August 21, 2018
    Assignee: Oracle International Corporation
    Inventors: Jianhua Li, Michael J. Link
  • Patent number: 9985775
    Abstract: A phase-locked loop (PLL) filter of a read channel includes a filter portion having an input coupled to delay circuitry having an output. The input of the filter portion is configured to receive a phase error signal. A look-up table is coupled to the filter portion. The look-up table comprises phase coefficients and frequency coefficients associated with a plurality of phase error magnitudes. The look-up table is configured to provide one or both of a selected phase coefficient and a selected frequency coefficient based on a magnitude of the phase error signal. The PLL filter is configured to adjust a bandwidth of the filter portion using one or both of the selected phase coefficient and the selected frequency coefficient. A phase signal indicative of estimated phase disturbance is produced at the output of the delay circuitry.
    Type: Grant
    Filed: December 6, 2016
    Date of Patent: May 29, 2018
    Assignee: SEAGATE TECHNOLOGY LLC
    Inventors: Ara Patapoutian, Belkacem Derras, William Michael Radich, Michael J. Link, Bruce D. Buch
  • Patent number: 9928854
    Abstract: An apparatus may include a circuit configured to generate a set of first ADC samples based on a first signal associated with a first read head position and a failed segment and to generate a set of second ADC samples based on a second signal associated with a second read head position and the failed segment. The circuit may then generate, by a MISO equalizer, a set of equalized ADC samples based on the set of first ADC samples and the set of second ADC samples.
    Type: Grant
    Filed: May 3, 2017
    Date of Patent: March 27, 2018
    Assignee: Seagate Technology LLC
    Inventors: Jason Charles Jury, Marcus Marrow, Michael J Link, Jason Bellorado
  • Publication number: 20170236533
    Abstract: A tape head is provided for use with a tape drive that is configured to receive a length of tape. The tape head includes a head body including at least one head element for performing read and/or write operations on the tape, and a protective layer extending over at least a portion of the head body for inhibiting wear of the head body when the tape is moved with respect to the head body. Furthermore, the protective layer is made of titanium oxide, chromium oxide, zirconium oxide, aluminum oxide, or zinc oxide.
    Type: Application
    Filed: May 2, 2017
    Publication date: August 17, 2017
    Applicant: Oracle International Corporation
    Inventors: Jianhua LI, Michael J. Link
  • Patent number: 9704518
    Abstract: A tape head is provided for use with a tape drive that is configured to receive a length of tape. The tape head includes a head body including at least one head element for performing read and/or write operations on the tape, and a protective layer extending over at least a portion of the head body for inhibiting wear of the head body when the tape is moved with respect to the head body. Furthermore, the protective layer is made of titanium oxide, chromium oxide, zirconium oxide, aluminum oxide, or zinc oxide.
    Type: Grant
    Filed: March 24, 2016
    Date of Patent: July 11, 2017
    Assignee: Oracle International Corporation
    Inventors: Jianhua Li, Michael J. Link
  • Patent number: 9613652
    Abstract: A recording head is configured to write and read data sectors to and from a recording medium, such as a heat-assisted recording medium. A read channel is coupled to the recording head. Phase-locked loop (PLL) circuitry of the read channel is configured to detect a change in a phase error at a location of the data sector. The phase error change may be indicative of a mode-hop that occurred while writing the data sector to the medium. The PLL circuitry is configured to determine a phase offset using the phase error. A controller is configured to effect re-reading of the data sector location using the phase offset to recover the data sector location.
    Type: Grant
    Filed: July 24, 2015
    Date of Patent: April 4, 2017
    Assignee: SEAGATE TECHNOLOGY LLC
    Inventors: Michael J. Link, Bruce Douglas Buch, Belkacem Derras
  • Publication number: 20170085364
    Abstract: A phase-locked loop (PLL) filter of a read channel includes a filter portion having an input coupled to delay circuitry having an output. The input of the filter portion is configured to receive a phase error signal. A look-up table is coupled to the filter portion. The look-up table comprises phase coefficients and frequency coefficients associated with a plurality of phase error magnitudes. The look-up table is configured to provide one or both of a selected phase coefficient and a selected frequency coefficient based on a magnitude of the phase error signal. The PLL filter is configured to adjust a bandwidth of the filter portion using one or both of the selected phase coefficient and the selected frequency coefficient. A phase signal indicative of estimated phase disturbance is produced at the output of the delay circuitry.
    Type: Application
    Filed: December 6, 2016
    Publication date: March 23, 2017
    Inventors: Ara Patapoutian, Belkacem Derras, William Michael Radich, Michael J. Link, Bruce D. Buch
  • Publication number: 20170025147
    Abstract: A recording head is configured to write and read data sectors to and from a recording medium, such as a heat-assisted recording medium. A read channel is coupled to the recording head. Phase-locked loop (PLL) circuitry of the read channel is configured to detect a change in a phase error at a location of the data sector. The phase error change may be indicative of a mode-hop that occurred while writing the data sector to the medium. The PLL circuitry is configured to determine a phase offset using the phase error. A controller is configured to effect re-reading of the data sector location using the phase offset to recover the data sector location.
    Type: Application
    Filed: July 24, 2015
    Publication date: January 26, 2017
    Inventors: Michael J. Link, Bruce Douglas Buch, Belkacem Derras
  • Patent number: 9525576
    Abstract: A phase-locked loop (PLL) filter of a read channel includes a filter portion having an input coupled to delay circuitry having an output. The input of the filter portion is configured to receive a phase error signal. A look-up table is coupled to the filter portion. The look-up table comprises phase coefficients and frequency coefficients associated with a plurality of phase error magnitudes. The look-up table is configured to provide one or both of a selected phase coefficient and a selected frequency coefficient based on a magnitude of the phase error signal. The PLL filter is configured to adjust a bandwidth of the filter portion using one or both of the selected phase coefficient and the selected frequency coefficient. A phase signal indicative of estimated phase disturbance is produced at the output of the delay circuitry.
    Type: Grant
    Filed: July 24, 2015
    Date of Patent: December 20, 2016
    Assignee: SEAGATE TECHNOLOGY LLC
    Inventors: Ara Patapoutian, Belkacem Derras, William Michael Radich, Michael J. Link, Bruce Douglas Buch
  • Publication number: 20160267926
    Abstract: A tape head is provided for use with a tape drive that is configured to receive a length of tape. The tape head includes a head body including at least one head element for performing read and/or write operations on the tape, and a protective layer extending over at least a portion of the head body for inhibiting wear of the head body when the tape is moved with respect to the head body. Furthermore, the protective layer is made of titanium oxide, chromium oxide, zirconium oxide, aluminum oxide, or zinc oxide.
    Type: Application
    Filed: March 24, 2016
    Publication date: September 15, 2016
    Inventors: Jianhua LI, Michael J. LINK
  • Patent number: 9311954
    Abstract: A tape head is provided for use with a tape drive that is configured to receive a length of tape. The tape head includes a head body including at least one head element for performing read and/or write operations on the tape, and a protective layer extending over at least a portion of the head body for inhibiting wear of the head body when the tape is moved with respect to the head body. Furthermore, the protective layer is made of titanium oxide, chromium oxide, zirconium oxide, aluminum oxide, or zinc oxide.
    Type: Grant
    Filed: March 12, 2015
    Date of Patent: April 12, 2016
    Assignee: OPACLE INTERNATIONAL CORPORATION
    Inventors: Jianhua Li, Michael J. Link
  • Patent number: 8913341
    Abstract: Multiple signals are read, respectively, from multiple different cross-track positions of a track of a magnetic medium. Weighting coefficients for each of the multiple signals are determined. The weighting coefficients are applied to the respective signals to form weighted signals. The weighted signals are combined and the combined signal is used to recover data stored in the track.
    Type: Grant
    Filed: July 31, 2013
    Date of Patent: December 16, 2014
    Assignee: Seagate Technology LLC
    Inventors: Jason C. Jury, Michael J. Link
  • Patent number: 7002492
    Abstract: A method and apparatus are provided for encoding successive data words into respective code words. Each data word is mapped into data segments that are constrained to a first number of bit patterns, which is less than a second number of bit patterns that satisfy a first constraint. The data segments are encoded into intermediate code word segments selected from a first set of the bit patterns that satisfy the first constraint, wherein at least some of the bit patterns in the first set violate a second constraint. The intermediate code word segments are encoded into respective code word segments by encoding the intermediate code word segments that violate the second constraint with code word segments selected from a second, different set of the bit patterns that satisfy the first constraint and the second constraint.
    Type: Grant
    Filed: July 7, 2004
    Date of Patent: February 21, 2006
    Assignee: Seagate Technology LLC
    Inventors: Kinhing P. Tsang, Michael J. Link
  • Patent number: 6872347
    Abstract: An ankle block for a leg prosthesis comprising an insert having a body with an upper mounting surface and a bottom interface surface opposite from the upper mounting surface. The insert body defines a central coaxial hole therethrough. An over mold is formed about an exterior of the body and extends upwardly therefrom defining a central cavity above the insert and above the upper mounting surface.
    Type: Grant
    Filed: December 29, 2003
    Date of Patent: March 29, 2005
    Assignee: College Park Industries, Inc.
    Inventors: Christopher L. Johnson, Eric L. Robinson, Michael J. Link
  • Publication number: 20040140581
    Abstract: An ankle block for a leg prosthesis comprising an insert having a body with an upper mounting surface and a bottom interface surface opposite from the upper mounting surface. The insert body defines a central coaxial hole therethrough. An over mold is formed about an exterior of the body and extends upwardly therefrom defining a central cavity above the insert and above the upper mounting surface.
    Type: Application
    Filed: December 29, 2003
    Publication date: July 22, 2004
    Inventors: Christopher L. Johnson, Eric L. Robinson, Michael J. Link