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).
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Patent number: 10446185Abstract: 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: GrantFiled: September 18, 2017Date of Patent: October 15, 2019Assignee: Seagate Technology LLCInventors: Richard P. Michel, Michael J. Link, Anand R. Kharpate, Guofang Xu
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Patent number: 10255931Abstract: 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: GrantFiled: March 5, 2018Date of Patent: April 9, 2019Assignee: Seagate Technology LLCInventors: Jason Charles Jury, Marcus Marrow, Michael J Link, Jason Bellorado
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Publication number: 20190088286Abstract: 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: ApplicationFiled: September 18, 2017Publication date: March 21, 2019Inventors: Richard P. Michel, Michael J. Link, Anand R. Kharpate, Guofang Xu
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Patent number: 10176828Abstract: 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: GrantFiled: July 23, 2018Date of Patent: January 8, 2019Assignee: Oracle International CorporationInventors: Jianhua Li, Michael J. Link
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Publication number: 20180350396Abstract: 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: ApplicationFiled: July 23, 2018Publication date: December 6, 2018Applicant: Oracle International CorporationInventors: Jianhua Li, Michael J. Link
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Patent number: 10056097Abstract: 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: GrantFiled: May 2, 2017Date of Patent: August 21, 2018Assignee: Oracle International CorporationInventors: Jianhua Li, Michael J. Link
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Patent number: 9985775Abstract: 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: GrantFiled: December 6, 2016Date of Patent: May 29, 2018Assignee: SEAGATE TECHNOLOGY LLCInventors: Ara Patapoutian, Belkacem Derras, William Michael Radich, Michael J. Link, Bruce D. Buch
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Patent number: 9928854Abstract: 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: GrantFiled: May 3, 2017Date of Patent: March 27, 2018Assignee: Seagate Technology LLCInventors: Jason Charles Jury, Marcus Marrow, Michael J Link, Jason Bellorado
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Publication number: 20170236533Abstract: 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: ApplicationFiled: May 2, 2017Publication date: August 17, 2017Applicant: Oracle International CorporationInventors: Jianhua LI, Michael J. Link
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Patent number: 9704518Abstract: 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: GrantFiled: March 24, 2016Date of Patent: July 11, 2017Assignee: Oracle International CorporationInventors: Jianhua Li, Michael J. Link
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Patent number: 9613652Abstract: 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: GrantFiled: July 24, 2015Date of Patent: April 4, 2017Assignee: SEAGATE TECHNOLOGY LLCInventors: Michael J. Link, Bruce Douglas Buch, Belkacem Derras
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Publication number: 20170085364Abstract: 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: ApplicationFiled: December 6, 2016Publication date: March 23, 2017Inventors: Ara Patapoutian, Belkacem Derras, William Michael Radich, Michael J. Link, Bruce D. Buch
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Publication number: 20170025147Abstract: 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: ApplicationFiled: July 24, 2015Publication date: January 26, 2017Inventors: Michael J. Link, Bruce Douglas Buch, Belkacem Derras
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Patent number: 9525576Abstract: 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: GrantFiled: July 24, 2015Date of Patent: December 20, 2016Assignee: SEAGATE TECHNOLOGY LLCInventors: Ara Patapoutian, Belkacem Derras, William Michael Radich, Michael J. Link, Bruce Douglas Buch
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Publication number: 20160267926Abstract: 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: ApplicationFiled: March 24, 2016Publication date: September 15, 2016Inventors: Jianhua LI, Michael J. LINK
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Patent number: 9311954Abstract: 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: GrantFiled: March 12, 2015Date of Patent: April 12, 2016Assignee: OPACLE INTERNATIONAL CORPORATIONInventors: Jianhua Li, Michael J. Link
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Patent number: 8913341Abstract: 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: GrantFiled: July 31, 2013Date of Patent: December 16, 2014Assignee: Seagate Technology LLCInventors: Jason C. Jury, Michael J. Link
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Patent number: 7002492Abstract: 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: GrantFiled: July 7, 2004Date of Patent: February 21, 2006Assignee: Seagate Technology LLCInventors: Kinhing P. Tsang, Michael J. Link
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Patent number: 6872347Abstract: 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: GrantFiled: December 29, 2003Date of Patent: March 29, 2005Assignee: College Park Industries, Inc.Inventors: Christopher L. Johnson, Eric L. Robinson, Michael J. Link
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Publication number: 20040140581Abstract: 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: ApplicationFiled: December 29, 2003Publication date: July 22, 2004Inventors: Christopher L. Johnson, Eric L. Robinson, Michael J. Link