Patents by Inventor Rama Venkatasubramanian
Rama Venkatasubramanian 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: 12242852Abstract: A digital data processor includes an instruction memory storing instructions specifying a data processing operation and a data operand field, an instruction decoder coupled to the instruction memory for recalling instructions from the instruction memory and determining the operation and the data operand, and an operational unit coupled to a data register file and to an instruction decoder to perform a data processing operation upon an operand corresponding to an instruction decoded by the instruction decoder and storing results of the data processing operation. The operational unit is configured to perform a table write in response to a look up table initialization instruction by duplicating at least one data element from a source data register to create duplicated data elements, and writing the duplicated data elements to a specified location in a specified number of at least one table and a corresponding location in at least one other table.Type: GrantFiled: July 17, 2023Date of Patent: March 4, 2025Assignee: Texas Instruments IncorporatedInventors: Naveen Bhoria, Dheera Balasubramanian Samudrala, Duc Bui, Rama Venkatasubramanian
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Publication number: 20240312867Abstract: Example superlattice structures and methods for thermoelectric devices are provided. An example structure may include a plurality of superlattice periods. Each superlattice period may include a first material layer disposed adjacent to a second material layer. For each superlattice period, the first material layer may be formed of a first material and the second material layer may be formed of a second material. The plurality of superlattice periods may include a first superlattice period and a second superlattice period. A thickness of a first material layer of the first superlattice period may be different than a thickness of a first material layer of the second superlattice period.Type: ApplicationFiled: January 26, 2024Publication date: September 19, 2024Applicant: The Johns Hopkins UniversityInventors: Rama Venkatasubramanian, Jonathan M. Pierce, Geza Dezsi
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Publication number: 20240312866Abstract: Example superlattice structures and methods for thermoelectric devices are provided. An example structure may include a plurality of superlattice periods. Each superlattice period may include a first material layer disposed adjacent to a second material layer. For each superlattice period, the first material layer may be formed of a first material and the second material layer may be formed of a second material. The plurality of superlattice periods may include a first superlattice period and a second superlattice period. A thickness of a first material layer of the first superlattice period may be different than a thickness of a first material layer of the second superlattice period.Type: ApplicationFiled: January 26, 2024Publication date: September 19, 2024Applicant: The Johns Hopkins UniversityInventors: Rama Venkatasubramanian, Jonathan M. Pierce, Geza Dezsi
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Publication number: 20240162112Abstract: Example superlattice structures and methods for thermoelectric devices are provided. An example structure may include a plurality of superlattice periods. Each superlattice period may include a first material layer disposed adjacent to a second material layer. For each superlattice period, the first material layer may be formed of a first material and the second material layer may be formed of a second material. The plurality of superlattice periods may include a first superlattice period and a second superlattice period. A thickness of a first material layer of the first superlattice period may be different than a thickness of a first material layer of the second superlattice period.Type: ApplicationFiled: January 26, 2024Publication date: May 16, 2024Applicant: The Johns Hopkins UniversityInventors: Rama Venkatasubramanian, Jonathan M. Pierce, Dezsi Geza
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Patent number: 11908769Abstract: Example superlattice structures and methods for thermoelectric devices are provided. An example structure may include a plurality of superlattice periods. Each superlattice period may include a first material layer disposed adjacent to a second material layer. For each superlattice period, the first material layer may be formed of a first material and the second material layer may be formed of a second material. The plurality of superlattice periods may include a first superlattice period and a second superlattice period. A thickness of a first material layer of the first superlattice period may be different than a thickness of a first material layer of the second superlattice period.Type: GrantFiled: December 23, 2020Date of Patent: February 20, 2024Assignee: The Johns Hopkins UniversityInventors: Rama Venkatasubramanian, Jonathan M. Pierce, Geza Dezsi
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Publication number: 20240028338Abstract: A digital data processor includes an instruction memory storing instructions each specifying a data processing operation and at least one data operand field, an instruction decoder coupled to the instruction memory for sequentially recalling instructions from the instruction memory and determining the data processing operation and the at least one data operand, and at least one operational unit coupled to a data register file and to an instruction decoder to perform a data processing operation upon at least one operand corresponding to an instruction decoded by the instruction decoder and storing results of the data processing operation. The operational unit is configured to increment histogram values in response to a histogram instruction by incrementing a bin entry at a specified location in a specified number of at least one histogram.Type: ApplicationFiled: October 2, 2023Publication date: January 25, 2024Inventors: Naveen BHORIA, Duc BUI, Rama VENKATASUBRAMANIAN, Dheera Balasubramanian SAMUDRALA, Alan DAVIS
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Publication number: 20240020125Abstract: A digital data processor includes a multi-stage butterfly network, which is configured to, in response to a look up table read instruction, receive look up table data from an intermediate register, reorder the look up table data based on control signals comprising look up table configuration register data, and write the reordered look up table data to a destination register specified by the look up table read instruction.Type: ApplicationFiled: September 29, 2023Publication date: January 18, 2024Inventors: Naveen BHORIA, Duc BUI, Dheera Balasubramanian SAMUDRALA, Rama VENKATASUBRAMANIAN
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Publication number: 20230359462Abstract: A digital data processor includes an instruction memory storing instructions specifying a data processing operation and a data operand field, an instruction decoder coupled to the instruction memory for recalling instructions from the instruction memory and determining the operation and the data operand, and an operational unit coupled to a data register file and to an instruction decoder to perform a data processing operation upon an operand corresponding to an instruction decoded by the instruction decoder and storing results of the data processing operation. The operational unit is configured to perform a table write in response to a look up table initialization instruction by duplicating at least one data element from a source data register to create duplicated data elements, and writing the duplicated data elements to a specified location in a specified number of at least one table and a corresponding location in at least one other table.Type: ApplicationFiled: July 17, 2023Publication date: November 9, 2023Inventors: Naveen Bhoria, Dheera Balasubramanian Samudrala, Duc Bui, Rama Venkatasubramanian
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Patent number: 11803382Abstract: A digital data processor includes a multi-stage butterfly network, which is configured to, in response to a look up table read instruction, receive look up table data from an intermediate register, reorder the look up table data based on control signals comprising look up table configuration register data, and write the reordered look up table data to a destination register specified by the look up table read instruction.Type: GrantFiled: September 2, 2022Date of Patent: October 31, 2023Assignee: Texas Instruments IncorporatedInventors: Naveen Bhoria, Duc Bui, Dheera Balasubramanian Samudrala, Rama Venkatasubramanian
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Patent number: 11775302Abstract: A digital data processor includes an instruction memory storing instructions each specifying a data processing operation and at least one data operand field, an instruction decoder coupled to the instruction memory for sequentially recalling instructions from the instruction memory and determining the data processing operation and the at least one data operand, and at least one operational unit coupled to a data register file and to an instruction decoder to perform a data processing operation upon at least one operand corresponding to an instruction decoded by the instruction decoder and storing results of the data processing operation. The operational unit is configured to increment histogram values in response to a histogram instruction by incrementing a bin entry at a specified location in a specified number of at least one histogram.Type: GrantFiled: October 25, 2021Date of Patent: October 3, 2023Assignee: Texas Instruments IncorporatedInventors: Naveen Bhoria, Duc Bui, Rama Venkatasubramanian, Dheera Balasubramanian Samudrala, Alan Davis
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Patent number: 11709677Abstract: A digital data processor includes an instruction memory storing instructions specifying a data processing operation and a data operand field, an instruction decoder coupled to the instruction memory for recalling instructions from the instruction memory and determining the operation and the data operand, and an operational unit coupled to a data register file and to an instruction decoder to perform a data processing operation upon an operand corresponding to an instruction decoded by the instruction decoder and storing results of the data processing operation. The operational unit is configured to perform a table write in response to a look up table initialization instruction by duplicating at least one data element from a source data register to create duplicated data elements, and writing the duplicated data elements to a specified location in a specified number of at least one table and a corresponding location in at least one other table.Type: GrantFiled: January 18, 2022Date of Patent: July 25, 2023Assignee: Texas Instruments IncorporatedInventors: Naveen Bhoria, Dheera Balasubramanian Samudrala, Duc Bui, Rama Venkatasubramanian
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Patent number: 11701653Abstract: A microfluidic apparatus is provided that includes a thermoelectrically-activated pixel array, a microfluidic chip, and control circuitry. The pixel array may include a plurality of thermal pixels, with each thermal pixel including a thermoelectric device. The microfluidic chip may include a microfluidic channel disposed adjacent to the thermal pixels such that thermal energy generated by the thermal pixels is received by the microfluidic channel to form a localized spot within the microfluidic channel corresponding to each thermal pixel. The control circuitry may be electrically coupled to each of the thermal pixels and configured to control the thermal energy being generated by each thermal pixel to control a temperature at each localized spot within the microfluidic channel.Type: GrantFiled: October 17, 2018Date of Patent: July 18, 2023Assignee: The Johns Hopkins UniversityInventors: Konstantinos Gerasopoulos, Rama Venkatasubramanian, Mekbib Astatke
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Publication number: 20230106799Abstract: A thermotactile stimulation prosthesis includes a prosthesis extremity having a prosthesis interface configured for attachment to a human limb, and a thermoelectric actuator array coupled to the prosthesis interface and configured to establish a noninvasive thermoneural human-machine interface capable of providing sensations of temperature to the human limb.Type: ApplicationFiled: November 30, 2022Publication date: April 6, 2023Inventors: Rama Venkatasubramanian, Luke E. Osborn, Robert S. Armiger, Meiyong Himmtann, Jonathan M. Pierce
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Publication number: 20220413863Abstract: A digital data processor includes a multi-stage butterfly network, which is configured to, in response to a look up table read instruction, receive look up table data from an intermediate register, reorder the look up table data based on control signals comprising look up table configuration register data, and write the reordered look up table data to a destination register specified by the look up table read instruction.Type: ApplicationFiled: September 2, 2022Publication date: December 29, 2022Inventors: Naveen BHORIA, Duc BUI, Dheera Balasubramanian SAMUDRALA, Rama VENKATASUBRAMANIAN
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Publication number: 20220416144Abstract: Systems, apparatuses, and methods are provided for scalable manufacturing of thermoelectric device modules for multiple uses on a single substrate. An example method can include disposing thermoelectric structures on a substrate, the substrate having a first substrate material, and the thermoelectric structures having a thermoelectric material disposed on a second substrate material. The example method can further include removing the second substrate material from each of the thermoelectric structures. The example method can further include forming electrical contacts on a top surface of each respective one of the thermoelectric structures. The example method can further include forming top headers over subsets of the electrical contacts. The example method can further include forming thermoelectric device modules, each of the thermoelectric device modules having at least a pair of the thermoelectric structures and at least one of the top headers.Type: ApplicationFiled: January 14, 2022Publication date: December 29, 2022Inventor: Rama Venkatasubramanian
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Patent number: 11532778Abstract: A fast-rate thermoelectric device control system includes a fast-rate thermoelectric device, a sensor, and a controller. The fast-rate thermoelectric device includes a thermoelectric actuator array disposed on a wafer, and the thermoelectric actuator array includes a thin-film thermoelectric (TFTE) actuator that generates a heating and/or a cooling effect in response to an electrical current. The sensor is configured to measure a temperature associated with the heating or cooling effect and output a feedback signal indicative of the measured temperature. The controller is in communication with the fast-rate thermoelectric device and the sensor, and is configured to control the electrical current based on the feedback signal.Type: GrantFiled: December 7, 2021Date of Patent: December 20, 2022Assignee: The Johns Hopkins UniversityInventors: Rama Venkatasubramanian, Luke E. Osborn, Robert S. Armiger, Meiyong Himmtann, Jonathan M. Pierce
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Publication number: 20220285571Abstract: Systems, apparatuses, and methods are provided for manufacturing nano-engineered thin-film thermoelectric (NETT) devices for photovoltaic applications, such as NETT converters that harness the coldness of space for satellite applications or for integration with terrestrial PV. An example method can include mounting a thin-film thermoelectric device to a photovoltaic device. The example method can further include mounting a heat sink device to the thin-film thermoelectric device. The example method can further include mounting a radiator device or heat exchanger device to the heat sink device.Type: ApplicationFiled: March 4, 2022Publication date: September 8, 2022Inventors: Rama Venkatasubramanian, Meiyong Himmtann, Priyadharshini Gajendiran, Jonathan M. Pierce, Nathan J. Fairbanks, Richard J. Ung, Jacob L. Ballard, Jeffrey P. Maranchi
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Patent number: 11436015Abstract: A digital data processor includes a multi-stage butterfly network, which is configured to, in response to a look up table read instruction, receive look up table data from an intermediate register, reorder the look up table data based on control signals comprising look up table configuration register data, and write the reordered look up table data to a destination register specified by the look up table read instruction.Type: GrantFiled: September 13, 2019Date of Patent: September 6, 2022Assignee: Texas Instmments IncorporatedInventors: Naveen Bhoria, Duc Bui, Dheera Balasubramanian Samudrala, Rama Venkatasubramanian
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Patent number: 11408937Abstract: In described examples, a latch includes active feedback circuitry for latching input information. A comparison of logic states between input and output states at selected times can determine whether, for example, the latch has correctly retained latch data. The latch can optionally be included within a scan chain, provide asynchronous latch error notifications, and/or synchronous notifications indicating where in the scan chain a latch error occurred.Type: GrantFiled: August 18, 2020Date of Patent: August 9, 2022Assignee: TEXAS INSTRUMENTS INCORPORATEDInventors: Jose Flores, Rama Venkatasubramanian
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Publication number: 20220137970Abstract: A digital data processor includes an instruction memory storing instructions specifying a data processing operation and a data operand field, an instruction decoder coupled to the instruction memory for recalling instructions from the instruction memory and determining the operation and the data operand, and an operational unit coupled to a data register file and to an instruction decoder to perform a data processing operation upon an operand corresponding to an instruction decoded by the instruction decoder and storing results of the data processing operation. The operational unit is configured to perform a table write in response to a look up table initialization instruction by duplicating at least one data element from a source data register to create duplicated data elements, and writing the duplicated data elements to a specified location in a specified number of at least one table and a corresponding location in at least one other table.Type: ApplicationFiled: January 18, 2022Publication date: May 5, 2022Inventors: Naveen Bhoria, Dheera Balasubramanian Samudrala, Duc Bui, Rama Venkatasubramanian