Patents by Inventor Sudipto Chakraborty
Sudipto Chakraborty 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: 11942796Abstract: A wireless power system includes a phase locked loop (PLL) providing an input signal tuned in frequency, a plurality of dividers coupled to the PLL to divide the frequency of the input signal, a plurality of phase interpolators electrically connected to the plurality of dividers to generate multiple phases based on the input signal, and a plurality of drivers electrically connected to the plurality of phase interpolators to direct a plurality of output signals each having a different frequency to a plurality of sensor clusters, each sensor cluster operating at a different frequency.Type: GrantFiled: February 10, 2021Date of Patent: March 26, 2024Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Sudipto Chakraborty, Rajiv Joshi
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Patent number: 11888445Abstract: A variable capacitor device comprises first and second control paths which are configured to enable differential control using first and second transistors of a same doping type in the first and second control paths, respectively, wherein the first and second transistors are configured as voltage variable resistors for tuning a capacitance of the variable capacitor device.Type: GrantFiled: April 18, 2022Date of Patent: January 30, 2024Assignee: International Business Machines CorporationInventors: Jean-Olivier Plouchart, Sudipto Chakraborty, Daniel Joseph Friedman, Baibhab Chatterjee
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Publication number: 20240010921Abstract: Processes and systems for converting waste plastics include feeding a waste plastic to a melt tank, and in the melt tank, heating the waste plastic to form a molten plastic. The molten plastic is withdrawn from the melt tank and fed to a pyrolysis reactor. In the pyrolysis reactor, the molten plastic is heated to a pyrolysis temperature, producing a pyrolysis oil product and a liquid pitch product. The pyrolysis oil is then separated into a pyrolysis gas fraction, a light pyrolysis oil fraction, a medium pyrolysis oil fraction, and a heavy pyrolysis oil fraction.Type: ApplicationFiled: September 20, 2023Publication date: January 11, 2024Applicant: LUMMUS TECHNOLOGY LLCInventors: Sudipto Chakraborty, Daniel T. Fernald, David Guymon, Ron Herbanek, Richard John Jibb, Johnny Doyle Combs, Boddie Lynn Lindsey
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Patent number: 11795401Abstract: Process and systems for converting waste plastics include feeding a waste plastic to a melt tank, and in the melt tank, heating the waste plastic to form a molten plastic. The molten plastic is withdrawn from the melt tank and fed to a pyrolysis reactor. In the pyrolysis reactor, the molten plastic is heated to a pyrolysis temperature, producing a pyrolysis oil product and a liquid pitch product. The pyrolysis oil is then separated into a pyrolysis gas fraction, a light pyrolysis oil fraction, a medium pyrolysis oil fraction, and a heavy pyrolysis oil fraction.Type: GrantFiled: January 14, 2022Date of Patent: October 24, 2023Assignee: LUMMUS TECHNOLOGY LLCInventors: Sudipto Chakraborty, Daniel T. Fernald, David Lee Guymon, Ron Herbanek, Richard John Jibb, Johnny Doyle Combs, Boddie Lynn Lindsey
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Publication number: 20230332051Abstract: Systems and processes for converting waste plastics and other waste materials to useful end products. The systems integrate a plastics pyrolysis reactor and a liquid phase thermal cracking reactor to advantageously process the waste plastics to form various hydrocarbon products.Type: ApplicationFiled: April 13, 2023Publication date: October 19, 2023Applicant: LUMMUS TECHNOLOGY LLCInventors: Daniel Bruce Gillis, Sudipto Chakraborty, Manoj Roy Som, Liang Chen, Fredy Antonio Cabrales
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Publication number: 20230336123Abstract: A variable capacitor device comprises first and second control paths which are configured to enable differential control using first and second transistors of a same doping type in the first and second control paths, respectively, wherein the first and second transistors are configured as voltage variable resistors for tuning a capacitance of the variable capacitor device.Type: ApplicationFiled: April 18, 2022Publication date: October 19, 2023Inventors: Jean-Olivier Plouchart, Sudipto Chakraborty, Daniel Joseph Friedman, Baibhab Chatterjee
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Publication number: 20230318529Abstract: A variable-gain power amplifying technique includes generating, with a network of one or more reactive components included in an oscillator, a first oscillating signal, and outputting, via one or more taps included in the network of the reactive components, a second oscillating signal. The second oscillating signal has a magnitude that is proportional to and less than the first oscillating signal. The power amplifying technique further includes selecting one of the first and second oscillating signals to use for generating a power-amplified output signal, and amplifying the selected one of the first and second oscillating signals to generate the power-amplified output signal.Type: ApplicationFiled: May 31, 2023Publication date: October 5, 2023Inventor: Sudipto Chakraborty
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Publication number: 20230317149Abstract: An apparatus includes a memory array. The array in turn includes a plurality of word lines, a plurality of bit line pairs intersecting the plurality of word lines at a plurality of cell locations, and a plurality of memory cells, coupled to the plurality of word lines and the plurality of bit line pairs, and located at the plurality of cell locations. A plurality of word line drivers are coupled to the plurality of word lines, a dynamic voltage boost is coupled to the memory array, and a controller is coupled to the plurality of word line drivers and the dynamic voltage boost. The controller is configured to cause the dynamic voltage boost to boost the cells during a multiply accumulate operation.Type: ApplicationFiled: March 31, 2022Publication date: October 5, 2023Inventors: Rajiv Joshi, Sudipto Chakraborty
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Patent number: 11777496Abstract: A device comprises a voltage-mode filter circuit, a current-mode output circuit, and a regulation circuit. The voltage-mode filter circuit is configured to generate a voltage signal on an output terminal thereof. The current-mode output circuit comprises an input transistor which comprises a gate terminal coupled to the output terminal of the voltage-mode filter circuit, and a source terminal coupled to a regulated node. The regulation circuit is configured to adjust a voltage level on the regulated node to maintain a constant gate-source bias voltage for the input transistor to generate a current for biasing the current-mode output circuit.Type: GrantFiled: August 22, 2022Date of Patent: October 3, 2023Assignee: International Business Machines CorporationInventors: Sudipto Chakraborty, John Francis Bulzacchelli, Daniel Joseph Friedman
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Patent number: 11774478Abstract: Systems, devices, computer-implemented methods, and/or computer program products that facilitate low power, wideband multitone generation. In one example, a multitone generator device can comprise a controller operatively coupled to first and second digital-to-analog converters (DACs). The controller can apply different delays of a sampling signal to the first and second DACs to facilitate sideband suppression of signals output by the first and second DACs. One aspect of such a multitone generator device is that the multitone generator device can facilitate low power, wideband multitone generation.Type: GrantFiled: August 20, 2021Date of Patent: October 3, 2023Assignee: International Business Machines CorporationInventors: Sudipto Chakraborty, George Russell Zettles, IV, Daniel Ramirez
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Publication number: 20230291390Abstract: One or more systems, devices and/or methods of use provided herein relate to a baseband filter that can be used in a current-mode end-to-end signal path. The current-mode end-to-end signal path can include a digital to analog converter (DAC) operating in current-mode and an upconverting mixer, operating in current-mode and operatively coupled to the DAC. In one or more embodiments, a device used in the signal path can comprise a baseband filter that receives an input current and outputs an output current. The baseband filter can comprise a feedback loop component having an active circuit branch and a passive circuit branch coupled in a loop. A mirroring device can be coupled to the feedback loop component and can provide an output of the device. Selectively activating the mirroring device can vary gain, such as of the mirroring device.Type: ApplicationFiled: May 17, 2023Publication date: September 14, 2023Inventors: Sudipto Chakraborty, Raymond Richetta, John Francis Bulzacchelli
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Patent number: 11757431Abstract: One or more systems, devices and/or methods of use provided herein relate to a device that can support a signal generation. A current-mode end-to-end signal path can include a digital to analog converter (DAC) operating in current-mode and an upconverting mixer, operating in current-mode and operatively coupled to the DAC. Analog inputs and outputs of the DAC and upconverting mixer can be represented as currents, and the DAC can generate a baseband signal. The DAC and upconverting mixer each can comprise switching transistors of the same type, such as p-type metal-oxide semiconductor (PMOS) switching transistors. In one or more embodiments, a current source and a diode-connected transistor can be arranged in parallel in the current-mode signal path, and the current source passes a static current, while the diode-connected transistor passes both a static current and a dynamic current.Type: GrantFiled: July 29, 2022Date of Patent: September 12, 2023Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Sudipto Chakraborty, John Francis Bulzacchelli, David James Frank
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Patent number: 11736095Abstract: A clock driver circuit for low powered clock driving may include: a multiple phase divider; a buffer supplying at least one of multiple phases to the multiple phase divider at a center frequency that is an integer multiple of an input frequency; and wherein the multiple phase divider and the buffer share a same current from a supply rail.Type: GrantFiled: November 15, 2022Date of Patent: August 22, 2023Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Daniel Ramirez, Sudipto Chakraborty
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Patent number: 11736091Abstract: One or more systems, devices and/or methods of use provided herein relate to a baseband filter that can be used in a current-mode end-to-end signal path. The current-mode end-to-end signal path can include a digital to analog converter (DAC) operating in current-mode and an upconverting mixer, operating in current-mode and operatively coupled to the DAC. In one or more embodiments, a device used in the signal path can comprise a baseband filter that receives an input current and outputs an output current. The baseband filter can comprise a feedback loop component having an active circuit branch and a passive circuit branch coupled in a loop. A mirroring device can be coupled to the feedback loop component and can provide an output of the device. Selectively activating the mirroring device can vary gain, such as of the mirroring device.Type: GrantFiled: December 20, 2021Date of Patent: August 22, 2023Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Sudipto Chakraborty, Raymond Richetta, John Francis Bulzacchelli
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Patent number: 11728836Abstract: A wireless wake-up receiver includes multiple signal chains each signal chain being coupled to continuously receive a signal from a respective antenna and to provide a respective detected pattern at a signal chain output. Each signal chain includes a first path having a mixer-first architecture and operates in a bandpass-mode using differential signals. The wireless wake-up receiver also includes a digital correlator operable to receive the respective detected patterns and to determine whether one of the respective detected patterns is equal to a desired pattern.Type: GrantFiled: May 9, 2022Date of Patent: August 15, 2023Assignee: Texas Instmments IncorporatedInventors: Sudipto Chakraborty, Jens Graul, Ram Pratap Aditham
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Patent number: 11720735Abstract: Using a flat shell for an accelerator card includes reading a flat shell from one or more computer readable storage media using computer hardware, wherein the flat shell is a synthesized, unplaced, and unrouted top-level circuit design specifying platform circuitry. A kernel specifying user circuitry is synthesized using the computer hardware. The kernel is obtained from the one or more computer readable storage media. The synthesized kernel is linked, using the computer hardware, to the flat shell forming a unified circuit design. The unified circuit design is placed and routed, using the computer hardware, to generate a placed and routed circuit design specifying the platform circuitry and the user circuitry for implementation in an integrated circuit.Type: GrantFiled: August 20, 2021Date of Patent: August 8, 2023Assignee: Xilinx, Inc.Inventors: Sebastian Turullols, Kyle Corbett, Sudipto Chakraborty, Siva Santosh Kumar Pyla, Ravinder Sharma, Kaustuv Manji, Jayaram Pvss, Stephen P. Rozum, Ch Vamshi Krishna, Susheel Puthana
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Publication number: 20230227729Abstract: A system for converting waste plastic material to petrochemicals. The system including a feed inlet and distributor zone, a raked film reaction section located below the feed inlet and distributor zone, and a stirred tank reaction section located below the raked film reaction section.Type: ApplicationFiled: January 13, 2023Publication date: July 20, 2023Applicant: LUMMUS TECHNOLOGY LLCInventors: David Lee Guymon, Daniel T. Fernald, Ron Herbanek, Richard John Jibb, Sudipto Chakraborty, Johnny Doyle Combs, Boddie Lynn Lindsey, Zachary Alan Mays
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Publication number: 20230227731Abstract: Systems and processes for pyrolyzing waste plastics, including, in one or more heating stages, heating a waste plastic from an initial temperature to a peak pyrolysis temperature, and, in a final pyrolysis stage, providing heat input sufficient to maintain a temperature of the waste plastic at a pyrolysis reaction temperature less than the peak pyrolysis temperature and maintaining the waste plastic at the pyrolysis reaction temperature for a time period to convert a portion of the waste plastic to a pyrolyzed product and a pitch. The process further includes recovering the pyrolyzed product and recovering the pitch.Type: ApplicationFiled: January 12, 2023Publication date: July 20, 2023Applicant: LUMMUS TECHNOLOGY LLCInventors: Sudipto Chakraborty, Liang Chen, Te-Chun Chu, Manoj Som, David Lee Guymon, Daniel T. Fernald, Richard John Jibb, Ron Herbanek
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Patent number: 11705863Abstract: An integrated circuit includes an oscillator and a power amplifier. The oscillator includes a first node, a second node, and a network of one or more reactive components coupled between the first node and the second node. The power amplifier includes a first input coupled to the first output of the oscillator, a second input coupled to the second output of the oscillator, and an output. The power amplifier includes a coarse gain control circuit, a first amplifier stage, and a second amplifier stage.Type: GrantFiled: January 12, 2022Date of Patent: July 18, 2023Assignee: TEXAS INSTRUMENTS INCORPORATEDInventor: Sudipto Chakraborty
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Patent number: 11706075Abstract: Transmitters and methods of transmitting a polar-modulated signal include a driver to output a polar-modulated signal according to a phase-modulation signal and an amplitude-modulation signal. A voltage regulator is connected to the driver, with the amplitude-modulation signal controlling an input of the voltage regulator and with the amplitude-modulation signal further being combined with an output of the voltage regulator to control an amplitude of the output of the driver to compensate for bandwidth cutoff noise in the voltage regulator.Type: GrantFiled: March 12, 2021Date of Patent: July 18, 2023Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Sudipto Chakraborty, Rajiv Joshi