Patents by Inventor Vivek Krishnamurthy
Vivek Krishnamurthy 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: 11940824Abstract: Embodiments of the present disclosure describe methods, apparatuses, and systems for hybrid low dropout regulator (LDO) architecture and realization to provide high power supply rejection ratio (PSRR) and high conversion efficiency (CE), and other benefits. The hybrid LDO may be coupled with dual rails for its analog LDO branch and digital LDO respectively to achieve high PSRR and high CE by utilizing the hybrid architecture with several feedback loops. Other embodiments may be described and claimed.Type: GrantFiled: November 20, 2020Date of Patent: March 26, 2024Assignee: Intel CorporationInventors: Xiaosen Liu, Harish Krishnamurthy, Krishnan Ravichandran, Vivek De, Scott Chiu, Claudia Patricia Barrera Gonzalez, Jing Han, Rajasekhara Madhusudan Narayana Bhatla
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Patent number: 11823708Abstract: An external cavity laser of a recording head includes a channel waveguide that delivers light towards a media-facing surface of the recording head. The laser includes an externally mounted part with an active region having a longitudinal axis corresponding to a light propagation direction of the channel waveguide. The externally mounted part has a reflective back facet and anti-reflective front facet. The laser includes a near-field transducer at an end of the channel waveguide proximate the media facing surface. The reflective back facet and the near-field transducer define a resonator of the external cavity laser.Type: GrantFiled: July 29, 2022Date of Patent: November 21, 2023Assignee: Seagate Technology LLCInventors: Vivek Krishnamurthy, Scott Eugene Olson, Tyler Lenn Perry, John Charles Duda
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Patent number: 11774366Abstract: A Surface-Enhanced Raman Spectroscopy (SERS) device to perform accurate label-free long-read DNA sequencing. A Raman sensor has a hot spot defined by plasmonic nanostructures and excited by at least one laser. An immobilized DNA polymerase can be used to pull a DNA template strand to be sequenced through the hot spot.Type: GrantFiled: August 5, 2020Date of Patent: October 3, 2023Assignee: SEAGATE TECHNOLOGY LLCInventors: Gemma Mendonsa, Eric K. Wadleigh, Vivek Krishnamurthy, Riyan A. Mendonsa, Martin G. Blaber, Krishnan Subramanian
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Patent number: 11676043Abstract: A mechanism is provided in a data processing system having a processor and a memory. The memory comprises instructions which are executed by the processor to cause the processor to implement a training system for finding an optimal surface for hierarchical classification task on an ontology. The training system receives a training data set and a hierarchical classification ontology data structure. The training system generates a neural network architecture based on the training data set and the hierarchical classification ontology data structure. The neural network architecture comprises an indicative layer, a parent tier (PT) output and a lower leaf tier (LLT) output. The training system trains the neural network architecture to classify the training data set to leaf nodes at the LLT output and parent nodes at the PT output. The indicative layer in the neural network architecture determines a surface that passes through each path from a root to a leaf node in the hierarchical ontology data structure.Type: GrantFiled: March 4, 2019Date of Patent: June 13, 2023Assignee: International Business Machines CorporationInventors: Pathirage Dinindu Sujan Udayanga Perera, Orna Raz, Ramani Routray, Vivek Krishnamurthy, Sheng Hua Bao, Eitan D. Farchi
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Publication number: 20230110250Abstract: A recording head comprises a write pole extending to an air-bearing surface. A near-field transducer is positioned proximate a first side of the write pole in a down-track direction. A heatsink structure is proximate the near-field transducer and positioned between the near-field transducer and the write pole. The heatsink structure extends beyond the near-field transducer in a cross-track direction and extends in a direction normal to the air-bearing surface.Type: ApplicationFiled: December 14, 2022Publication date: April 13, 2023Inventors: Helene Parwana Habibi, Simon Bance, Martin Liam McGarry, Raul Horacio Andruet, Martin Giles Blaber, Weibin Chen, John Charles Duda, Mark Anthony Gubbins, Erik Jon Hutchinson, Vivek Krishnamurthy, Michael Allen Seigler, Chen Wang
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Patent number: 11574648Abstract: An apparatus comprises a slider configured for heat-assisted magnetic recording comprising an air bearing surface (ABS). The slider comprises a write pole at or near the ABS, and a near-field transducer (NFT) at or near the ABS and proximate the write pole. A main waveguide is configured to receive light from a laser source and communicate the light to the NFT. An optical power sensor comprises a tap waveguide optically coupled to the main waveguide and comprising a first end and an opposing second end. The optical power sensor also comprises a bolometer optically coupled to the tap waveguide and configured to receive a portion of the light extracted from the main waveguide by the tap waveguide.Type: GrantFiled: August 12, 2021Date of Patent: February 7, 2023Assignee: Seagate Technology LLCInventors: Chubing Peng, Vivek Krishnamurthy, Nils Jan Gokemeijer
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Patent number: 11538496Abstract: A recording head comprises a write pole extending to an air-bearing surface. A near-field transducer is positioned proximate a first side of the write pole in a down-track direction. A heatsink structure is proximate the near-field transducer and positioned between the near-field transducer and the write pole. The heatsink structure extends beyond the near-field transducer in a cross-track direction and extends in a direction normal to the air-bearing surface.Type: GrantFiled: May 13, 2021Date of Patent: December 27, 2022Assignee: Seagate Technology LLCInventors: Helene Parwana Habibi, Simon Bance, Martin Liam McGarry, Raul Horacio Andruet, Martin Giles Blaber, Weibin Chen, John Charles Duda, Mark Anthony Gubbins, Erik Jon Hutchinson, Vivek Krishnamurthy, Michael Allen Seigler, Chen Wang
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Patent number: 11437068Abstract: A recording head includes an external cavity laser with an externally mounted part having an active region. The external cavity laser also includes a channel waveguide that delivers light towards a media-facing surface. A near-field transducer functions as a reflector, either alone or in combination with a Bragg grating in the channel waveguide. A reflective back facet of the externally mounted part and the reflector define a resonator of the external cavity laser.Type: GrantFiled: July 30, 2020Date of Patent: September 6, 2022Assignee: Seagate Technology LLCInventors: Vivek Krishnamurthy, Scott Eugene Olson, Tyler Lenn Perry, John Charles Duda
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Publication number: 20220267843Abstract: An integrated on-chip system and methods for real-time molecular sequencing. The system has a semiconductor chip and a laser. The semiconductor chip has integrated therein a main waveguide, a plurality of branch waveguides optically connected to the main waveguide, a plurality of nanochannels each having a fluid inlet and a fluid outlet, a plurality of molecule traps, a molecule trap at an intersection of a branch waveguide and a nanochannel, and a plurality of photodetectors operably connected to the plurality of molecule traps, one photodetector for a molecule trap, the photodetector to detect a spectral signature from a molecule in the molecule trap. The laser is optically connected to the main waveguide.Type: ApplicationFiled: February 22, 2022Publication date: August 25, 2022Inventor: Vivek KRISHNAMURTHY
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Publication number: 20220068301Abstract: An apparatus comprises a slider configured for heat-assisted magnetic recording comprising an air bearing surface (ABS). The slider comprises a write pole at or near the ABS, and a near-field transducer (NFT) at or near the ABS and proximate the write pole. A main waveguide is configured to receive light from a laser source and communicate the light to the NFT. An optical power sensor comprises a tap waveguide optically coupled to the main waveguide and comprising a first end and an opposing second end. The optical power sensor also comprises a bolometer optically coupled to the tap waveguide and configured to receive a portion of the light extracted from the main waveguide by the tap waveguide.Type: ApplicationFiled: August 12, 2021Publication date: March 3, 2022Inventors: Chubing Peng, Vivek Krishnamurthy, Nils Jan Gokemeijer
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Publication number: 20210366515Abstract: A recording head comprises a write pole extending to an air-bearing surface. A near-field transducer is positioned proximate a first side of the write pole in a down-track direction. A heatsink structure is proximate the near-field transducer and positioned between the near-field transducer and the write pole. The heatsink structure extends beyond the near-field transducer in a cross-track direction and extends in a direction normal to the air-bearing surface.Type: ApplicationFiled: May 13, 2021Publication date: November 25, 2021Inventors: Helene Parwana Habibi, Simon Bance, Martin Liam McGarry, Raul Horacio Andruet, Martin Giles Blaber, Weibin Chen, John Charles Duda, Mark Anthony Gubbins, Erik Jon Hutchinson, Vivek Krishnamurthy, Michael Allen Seigler, Chen Wang
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Patent number: 11120824Abstract: An apparatus comprises a slider configured for heat-assisted magnetic recording comprising an air bearing surface (ABS). The slider comprises a write pole at or near the ABS, and a near-field transducer (NFT) at or near the ABS and proximate the write pole. A main waveguide is configured to receive light from a laser source and communicate the light to the NFT. An optical power sensor comprises a tap waveguide optically coupled to the main waveguide and comprising a first end and an opposing second end. The optical power sensor also comprises a bolometer optically coupled to the tap waveguide and configured to receive a portion of the light extracted from the main waveguide by the tap waveguide.Type: GrantFiled: August 26, 2020Date of Patent: September 14, 2021Assignee: Seagate Technology LLCInventors: Chubing Peng, Vivek Krishnamurthy, Nils Jan Gokemeijer
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Publication number: 20210148828Abstract: A Surface-Enhanced Raman Spectroscopy (SERS) device to perform accurate label-free long-read DNA sequencing. A Raman sensor has a hot spot defined by plasmonic nanostructures and excited by at least one laser. An immobilized DNA polymerase can be used to pull a DNA template strand to be sequenced through the hot spot.Type: ApplicationFiled: August 5, 2020Publication date: May 20, 2021Inventors: Gemma Mendonsa, Eric K. Wadleigh, Vivek Krishnamurthy, Riyan A. Mendonsa, Martin G. Blaber, Krishnan Subramanian
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Patent number: 11011201Abstract: A recording head comprises a write pole extending to an air-bearing surface. A near-field transducer is positioned proximate a first side of the write pole in a down-track direction. A heatsink structure is proximate the near-field transducer and positioned between the near-field transducer and the write pole. The heatsink structure extends beyond the near-field transducer in a cross-track direction and extends in a direction normal to the air-bearing surface.Type: GrantFiled: July 24, 2019Date of Patent: May 18, 2021Assignee: Seagate Technology LLCInventors: Helene Parwana Habibi, Simon Bance, Martin Liam McGarry, Raul Horacio Andruet, Martin Giles Blaber, Weibin Chen, John Charles Duda, Mark Anthony Gubbins, Erik Jon Hutchinson, Vivek Krishnamurthy, Michael Allen Seigler, Chen Wang
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Publication number: 20210027809Abstract: A recording head comprises a write pole extending to an air-bearing surface. A near-field transducer is positioned proximate a first side of the write pole in a down-track direction. A heatsink structure is proximate the near-field transducer and positioned between the near-field transducer and the write pole. The heatsink structure extends beyond the near-field transducer in a cross-track direction and extends in a direction normal to the air-bearing surface.Type: ApplicationFiled: July 24, 2019Publication date: January 28, 2021Inventors: Helene Parwana Habibi, Simon Bance, Martin Liam McGarry, Raul Horacio Andruet, Martin Giles Blaber, Weibin Chen, John Charles Duda, Mark Anthony Gubbins, Erik Jon Hutchinson, Vivek Krishnamurthy, Michael Allen Seigler, Chen Wang
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Patent number: 10817669Abstract: A method, a system, and a computer program product are provided. A training set of adverse event text fragments assigned to medical codes is analyzed to determine first text fragments having frequently occurring medical code assignments and second text fragments having infrequently occurring medical code assignments. The training set is modified to undersample the first text fragments and to oversample the second text fragments such that the text fragments of the modified training set correspond to a substantially uniform assignment of the medical codes. At least one machine learning model is generated and trained with the modified training set. Some parameters of the at least one machine learning model are updated based on errors detected during the training. After completing the training, an adverse event text fragment is applied to the at least one machine learning model to assign at least one medical code.Type: GrantFiled: January 14, 2019Date of Patent: October 27, 2020Assignee: International Business Machines CorporationInventors: Cartic Ramakrishnan, Pathirage D. S. U. Perera, Sheng Hua Bao, Vivek Krishnamurthy
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Publication number: 20200285943Abstract: A mechanism is provided in a data processing system having a processor and a memory. The memory comprises instructions which are executed by the processor to cause the processor to implement a training system for finding an optimal surface for hierarchical classification task on an ontology. The training system receives a training data set and a hierarchical classification ontology data structure. The training system generates a neural network architecture based on the training data set and the hierarchical classification ontology data structure. The neural network architecture comprises an indicative layer, a parent tier (PT) output and a lower leaf tier (LLT) output. The training system trains the neural network architecture to classify the training data set to leaf nodes at the LLT output and parent nodes at the PT output. The indicative layer in the neural network architecture determines a surface that passes through each path from a root to a leaf node in the hierarchical ontology data structure.Type: ApplicationFiled: March 4, 2019Publication date: September 10, 2020Inventors: Pathirage Dinindu Sujan Udayanga Perera, Orna Raz, Ramani Routray, Vivek Krishnamurthy, Sheng Hua Bao, Eitan D. Farchi
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Publication number: 20200226218Abstract: A method, a system, and a computer program product are provided. A training set of adverse event text fragments assigned to medical codes is analyzed to determine first text fragments having frequently occurring medical code assignments and second text fragments having infrequently occurring medical code assignments. The training set is modified to undersample the first text fragments and to oversample the second text fragments such that the text fragments of the modified training set correspond to a substantially uniform assignment of the medical codes. At least one machine learning model is generated and trained with the modified training set. Some parameters of the at least one machine learning model are updated based on errors detected during the training. After completing the training, an adverse event text fragment is applied to the at least one machine learning model to assign at least one medical code.Type: ApplicationFiled: January 14, 2019Publication date: July 16, 2020Inventors: Cartic Ramakrishnan, Pathirage D.S.U. Perera, Sheng Hua Bao, Vivek Krishnamurthy
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Patent number: 10714137Abstract: A recording head includes a waveguide core layer that delivers light from a light source to a region proximate a magnetic write pole. A near-field transducer that is formed of a thin metal film is deposited over the waveguide core layer. The near-field transducer includes an enlarged part with two straight edges facing a media-facing surface and at obtuse angles relative to the media-facing surface. A peg extends from the enlarged part towards the media-facing surface. The near-field transducer includes a metal aperture plate at the media-facing surface. The metal aperture plate surrounds at least three sides of the end of the peg.Type: GrantFiled: March 14, 2019Date of Patent: July 14, 2020Assignee: Seagate Technology LLCInventors: Vivek Krishnamurthy, TaeWoo Lee, Michael Allen Seigler, Peng Zhang, Martin Giles Blaber
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Patent number: 10186292Abstract: A recording head has a waveguide core layer that delivers light from a light source to a region proximate a magnetic write pole. A near-field transducer is formed of a thin film of Rh or Ir deposited over the waveguide core layer. The near-field transducer includes an enlarged part with two straight edges facing a media-facing surface and at obtuse angles relative to the media-facing surface. A peg extends from the enlarged part towards the media-facing surface. The waveguide core layer has a terminating end with terminating edges that align with the two straight edges of the near-field transducer.Type: GrantFiled: April 30, 2018Date of Patent: January 22, 2019Assignee: Seagate Technology LLCInventors: Vivek Krishnamurthy, Tae-Woo Lee, Michael Allen Seigler, Peng Zhang