Patents by Inventor David James Frank
David James Frank 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: 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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Publication number: 20230208402Abstract: 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: ApplicationFiled: July 29, 2022Publication date: June 29, 2023Inventors: Sudipto Chakraborty, John Francis Bulzacchelli, David James Frank
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Patent number: 11683026Abstract: Techniques are provided for calibrating signal currents in a radio frequency signal generator system, such as an arbitrary waveform generator system. A device comprises a current measurement circuit and a current imbalance correction circuit. The current measurement circuit is configured, during a calibration process, to measure a first current in a first signal path of a radio frequency signal generator, and to measure a second current in a second signal path of the radio frequency signal generator. The current imbalance correction circuit is configured to adjust a current level in at least one of the first signal path and the second signal path of the radio frequency signal generator to correct for an imbalance between the measured first current and the measured second current.Type: GrantFiled: August 30, 2022Date of Patent: June 20, 2023Assignee: International Business Machines CorporationInventors: Sudipto Chakraborty, John Francis Bulzacchelli, Andrew D. Davies, Daniel Joseph Friedman, David James Frank
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Patent number: 11678591Abstract: Devices, systems, methods, and/or computer-implemented methods that can facilitate a qubit device comprising a vacuum encapsulated Josephson junction are provided. According to an embodiment, a device can comprise a substrate having an encapsulated vacuum cavity provided on the substrate. The device can further comprise one or more superconducting components of a superconducting circuit provided inside the encapsulated vacuum cavity.Type: GrantFiled: September 29, 2020Date of Patent: June 13, 2023Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Isaac Lauer, Karthik Balakrishnan, Jeffrey Sleight, David James Frank
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Publication number: 20230170889Abstract: One or more systems, devices, methods of use and/or methods of fabrication provided herein relate to a quantum computing device that can operated to have 1st order insensitivity to flux noise. According to one embodiment, a device comprises a flux tunable qubit capacitively coupled to a flux tunable bus. According to another embodiment, a device comprises a flux tunable qubit capacitively coupled to a flux tunable bus, wherein the flux tunable bus is capacitively coupled a fixed frequency qubit.Type: ApplicationFiled: November 30, 2021Publication date: June 1, 2023Inventors: Devin Underwood, Jiri Stehlik, David James Frank, Timothy Phung, David Zajac
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Patent number: 11641188Abstract: One or more systems, devices and/or methods of use provided herein relate to a device that can facilitate 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 analog outputs of the DAC and the upconverting mixer can be represented as currents, and the DAC can generate a baseband signal. In one or more embodiments, a current source and a diode-connected transistor can be arranged in parallel in the current-mode signal path between a baseband filter and an output stage comprising the upconverting mixer. The device and/or system can be a radio frequency DAC. The diode-connected transistor can be programmable to vary gain and/or can be directly connected to the output stage absent a turnaround current mirror connected therebetween.Type: GrantFiled: December 29, 2021Date of Patent: May 2, 2023Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Sudipto Chakraborty, John Francis Bulzacchelli, David James Frank
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Patent number: 11604862Abstract: Embodiments herein disclose computer-implemented methods, computer program products and computer systems for authenticating a user. The computer-implemented method may include receiving biographical data corresponding to a user. A change rate may be determined based on user biographical data. The computer-implemented method may include receiving first biometric data having a time-varying characteristic from the user at a first time and receiving second biometric data having the time-varying characteristic from the user at a second time that is later in time than the first time. Further, the computer-implemented method may include determining third biometric data based at least on the first biometric data, the second time, and the time-varying characteristic, and authenticating the user if the third biometric data is within a predetermined threshold of the second biometric data at the second time.Type: GrantFiled: August 18, 2020Date of Patent: March 14, 2023Assignee: International Business Machines CorporationInventors: Guy M. Cohen, Lior Horesh, Raya Horesh, David James Frank
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Patent number: 11539347Abstract: A radio frequency (RF) transmission circuit includes an input stage, a current-mode mixer coupled to an output of the input stage, an attenuator coupled to an output of the current-mode mixer, and a matching network coupled to an output of the attenuator. The input stage, current-mode mixer, attenuator, and the matching network are configured in a series stack.Type: GrantFiled: September 3, 2021Date of Patent: December 27, 2022Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Sudipto Chakraborty, John Francis Bulzacchelli, David James Frank, Andrew D. Davies
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Publication number: 20220407460Abstract: A current mode end-to-end signal path includes, a digital to analog converter (DAC), operating in current mode and an upconverting mixer, operating in current mode and operatively coupled to the DAC, wherein analog inputs and analog outputs of the DAC and the upconverting mixer are represented as currents, and the DAC generates a baseband signal.Type: ApplicationFiled: June 22, 2021Publication date: December 22, 2022Inventors: Sudipto Chakraborty, David James Frank, John Francis Bulzacchelli, Rajiv Joshi, Daniel Joseph Friedman
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Publication number: 20220102613Abstract: Devices, systems, methods, and/or computer-implemented methods that can facilitate a qubit device comprising a superconducting circuit provided on an encapsulated vacuum cavity are provided. According to an embodiment, a device can comprise a substrate having an encapsulated vacuum cavity provided on the substrate. The device can further comprise a superconducting circuit provided on the encapsulated vacuum cavity.Type: ApplicationFiled: September 29, 2020Publication date: March 31, 2022Inventors: Isaac Lauer, Karthik Balakrishnan, Jeffrey Sleight, David James Frank
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Publication number: 20220102612Abstract: Devices, systems, methods, and/or computer-implemented methods that can facilitate a qubit device comprising a vacuum encapsulated Josephson junction are provided. According to an embodiment, a device can comprise a substrate having an encapsulated vacuum cavity provided on the substrate. The device can further comprise one or more superconducting components of a superconducting circuit provided inside the encapsulated vacuum cavity.Type: ApplicationFiled: September 29, 2020Publication date: March 31, 2022Inventors: Isaac Lauer, Karthik Balakrishnan, Jeffrey Sleight, David James Frank
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Publication number: 20220058248Abstract: Embodiments herein disclose computer-implemented methods, computer program products and computer systems for authenticating a user. The computer-implemented method may include receiving biographical data corresponding to a user. A change rate may be determined based on user biographical data. The computer-implemented method may include receiving first biometric data having a time-varying characteristic from the user at a first time and receiving second biometric data having the time-varying characteristic from the user at a second time that is later in time than the first time. Further, the computer-implemented method may include determining third biometric data based at least on the first biometric data, the second time, and the time-varying characteristic, and authenticating the user if the third biometric data is within a predetermined threshold of the second biometric data at the second time.Type: ApplicationFiled: August 18, 2020Publication date: February 24, 2022Inventors: Guy M. Cohen, Lior Horesh, Raya Horesh, David James Frank
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Publication number: 20170154125Abstract: A method, device or system can include a key-word generator receiving contextual input, parsing the contextual input and generating a plurality of suggestions based on the contextual input, and a display receiving the plurality of suggestions from the key-word generator. The device or system can also include an autocomplete suggestion generator that receives the plurality of suggestions generated by the key-word generator, a search input, a second set of suggestions generated using another method than the key-word generator to provide autocomplete suggestions displayed on the display.Type: ApplicationFiled: November 30, 2015Publication date: June 1, 2017Inventors: Karthik Balakrishnan, David James Frank, Linder Barry Paul
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Patent number: 8716091Abstract: A method for fabricating an upside-down p-FET includes: fully etching source and drain regions in a donor substrate by etching a silicon-on-insulator layer through buried oxide and partially etching the silicon substrate; refilling a bottom and sidewall surfaces of the etched source and drain regions with epitaxial silicide/germanide to form e-SiGe source and drain regions; capping the source and drain regions with self-aligning silicide/germanide; providing a silicide layer formed over the gate conductor line; providing a first stress liner over the gate and the e-SiGe source and drain regions; depositing a planarized dielectric over the self-aligning silicide/germanide; inverting the donor substrate; bonding the donor substrate to a host wafer; and selectively exposing the buried oxide and the e-SiGe source and drain regions by removing the donor wafer.Type: GrantFiled: March 30, 2010Date of Patent: May 6, 2014Assignee: International Business Machines CorporationInventors: Guy Cohen, David James Frank, Isaac Lauer