Patents by Inventor Juan M. Rivas Davila
Juan M. Rivas Davila 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: 11843312Abstract: An apparatus including direct-current (DC)-alternating-current (AC) inverter circuitry, first and second circuits, and output circuitry. The DC-AC inverter circuitry inverts a DC input signal corresponding to an input voltage to an AC signal. The first circuit and second circuits respectively include inductive isolation circuits driven in response to power from the at least one AC signal, and rectifier circuits that responds to the inductive isolation circuits by outputting first and second rectified signals, where at least one of the first and second rectifier circuits characterized as being limited by a voltage breakdown rating. The output circuitry provides a DC output voltage signal and to cascade a plurality of signals, including the first and second rectified signals, to provide a voltage source that is dependent on the first and second rectified signals and greater than voltage breakdown rating.Type: GrantFiled: December 15, 2021Date of Patent: December 12, 2023Assignee: The Board of Trustees of the Leland Stanford Junior UniversityInventors: Juan M. Rivas-Davila, Lei Gu, Luke C. Raymond, Sanghyeon Park
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Patent number: 11828273Abstract: According to certain aspects, an electric-propulsion thruster is used as part of a base or platform which also includes a power converter, having a plurality of inductors and other electrical components, and a printed circuit board (PCB). The PCB includes a layer at which the other electrical components and printed circuit inductor traces, for the plurality of inductors, are secured. The electric-propulsion thruster includes a housing (e.g., as part of the base or platform) providing a cavity and having at least one structurally-rigid side wall along the cavity, where the PCB is integrated with the electric-propulsion thruster for a compact arrangement which can be used to propel the apparatus. Such a compact design might be used as an important part of thruster spacecraft architecture such as micro-satellites (e.g., CubeSats).Type: GrantFiled: March 23, 2018Date of Patent: November 28, 2023Assignee: The Board of Trustees of the Leland Stanford Junior UniversityInventors: Wei Liang, Luke C. Raymond, Juan M. Rivas Davila, Roderick Boswell, Christine Charles
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Publication number: 20230130908Abstract: In certain examples, methods and semiconductor structures are directed to operation of a piezoelectric-based device (e.g., a DC-DC converter) and such operation may involve selectively switching inputs of the piezoelectric-based device at a modulation frequency and, in response, decoupling of the modulation frequency from output power delivered by the piezoelectric-based device. In some examples, the inputs of the piezoelectric-based device are selectively switched to cause decoupling the modulation frequency from output power delivered by the piezoelectric-based device and/or cause operation of the piezoelectric-based device without spurious mode operation.Type: ApplicationFiled: October 6, 2022Publication date: April 27, 2023Inventors: Eric Stolt, Juan M. Rivas-Davila, Weston D. Braun
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Publication number: 20220247322Abstract: An apparatus including direct-current (DC)-alternating-current (AC) inverter circuitry, first and second circuits, and output circuitry. The DC-AC inverter circuitry inverts a DC input signal corresponding to an input voltage to an AC signal. The first circuit and second circuits respectively include inductive isolation circuits driven in response to power from the at least one AC signal, and rectifier circuits that responds to the inductive isolation circuits by outputting first and second rectified signals, where at least one of the first and second rectifier circuits characterized as being limited by a voltage breakdown rating. The output circuitry provides a DC output voltage signal and to cascade a plurality of signals, including the first and second rectified signals, to provide a voltage source that is dependent on the first and second rectified signals and greater than voltage breakdown rating.Type: ApplicationFiled: December 15, 2021Publication date: August 4, 2022Inventors: Juan M. Rivas-Davila, Lei Gu, Luke C. Raymond, Sanghyeon Park
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Patent number: 11296507Abstract: Improved control of electrical power consumption is provided with “Smart Dim Fuses” (SDF) which can alter their output voltage as provided to the load circuits they are connected to. SDF units can replace conventional circuit breakers in electrical panels. The voltage control capability provided by SDF units can lead to improved control of electrical power consumption, since many loads can smoothly operate at lower power consumption when the voltage they are driven with decreases. SDF units can comply with relevant safety requirements, such as uninterrupted neutral connections between electrical mains and load circuits. SDF units can also provide a current limiting function that can substitute for the protective action of conventional circuit breakers.Type: GrantFiled: July 9, 2018Date of Patent: April 5, 2022Assignee: The Board of Trustees of the Leland Stanford Junior UniversityInventors: Aaron Sargent Goldin, Ram Rajagopal, Claudio Rivetta, Juan M. Rivas Davila
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Patent number: 11228252Abstract: An apparatus including direct-current (DC)-alternating-current (AC) inverter circuitry, first and second circuits, and output circuitry. The DC-AC inverter circuitry inverts a DC input signal corresponding to an input voltage to an AC signal. The first circuit and second circuits respectively include inductive isolation circuits driven in response to power from the at least one AC signal, and rectifier circuits that responds to the inductive isolation circuits by outputting first and second rectified signals, where at least one of the first and second rectifier circuits characterized as being limited by a voltage breakdown rating. The output circuitry provides a DC output voltage signal and to cascade a plurality of signals, including the first and second rectified signals, to provide a voltage source that is dependent on the first and second rectified signals and greater than voltage breakdown rating.Type: GrantFiled: March 7, 2019Date of Patent: January 18, 2022Assignee: The Board of Trustees of the Leland Stanford Junior UniversityInventors: Juan M. Rivas-Davila, Lei Gu, Luke C. Raymond, Sanghyeon Park
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Patent number: 11031179Abstract: Precision fabrication of 3D objects is used for fabricating passive electrical components. A 3D scaffold is fabricated and then electrically conductive and/or insulating layers are deposited on the scaffold to form the electrical component.Type: GrantFiled: September 2, 2015Date of Patent: June 8, 2021Assignee: The Board of Trustees of the Leland Stanford Junior UniversityInventors: Juan M. Rivas Davila, Wei Liang, Luke C. Raymond
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Patent number: 10998823Abstract: A resonant DC-DC converter for generating high voltage MHz bi-polar DC pulses includes a left multi-level resonant rectifier bank [100] connected to a positive electrode [104] and coupled via capacitive isolation to a left RF amplifier terminal [128]; a right multi-level resonant rectifier bank [102] connected to a negative electrode [106] and coupled via capacitive isolation to a right RF amplifier terminal [130]. Each multi-level resonant rectifier bank comprises multiple resonant rectifier stages [112-122], where each stage comprises two capacitors for capacitively isolating the stage, an output capacitor, a MOSFET switch connected to an adjacent MOSFET switch of an adjacent stage, and a gating resonant circuit connected to the MOSFET switch, whereby MOSFET switches in the banks can be passively controlled by RF signals from a left RF amplifier and a right RF amplifier.Type: GrantFiled: June 26, 2017Date of Patent: May 4, 2021Assignee: The Board of Trustees of the Leland Stanford Junior UniversityInventors: Luke C. Raymond, Wei Liang, Kawin Surakitbovorn, Juan M. Rivas Davila
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Publication number: 20210075333Abstract: An apparatus including direct-current (DC)-alternating-current (AC) inverter circuitry, first and second circuits, and output circuitry. The DC-AC inverter circuitry inverts a DC input signal corresponding to an input voltage to an AC signal. The first circuit and second circuits respectively include inductive isolation circuits driven in response to power from the at least one AC signal, and rectifier circuits that responds to the inductive isolation circuits by outputting first and second rectified signals, where at least one of the first and second rectifier circuits characterized as being limited by a voltage breakdown rating. The output circuitry provides a DC output voltage signal and to cascade a plurality of signals, including the first and second rectified signals, to provide a voltage source that is dependent on the first and second rectified signals and greater than voltage breakdown rating.Type: ApplicationFiled: March 7, 2019Publication date: March 11, 2021Inventors: Juan M. Rivas-Davila, Lei Gu, Luke C. Raymond, Sanghyeon Park
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Publication number: 20200378372Abstract: According to certain aspects, an electric-propulsion thruster is used as part of a base or platform which also includes a power converter, having a plurality of inductors and other electrical components, and a printed circuit board (PCB). The PCB includes a layer at which the other electrical components and printed circuit inductor traces, for the plurality of inductors, are secured. The electric-propulsion thruster includes a housing (e.g., as part of the base or platform) providing a cavity and having at least one structurally-rigid side wall along the cavity, where the PCB is integrated with the electric-propulsion thruster for a compact arrangement which can be used to propel the apparatus. Such a compact design might be used as an important part of thruster spacecraft architecture such as micro-satellites (e.g., CubeSats).Type: ApplicationFiled: March 23, 2018Publication date: December 3, 2020Inventors: Wei Liang, Luke C. Raymond, Juan M. Rivas Davila, Roderick Boswell, Christine Charles
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Patent number: 10855186Abstract: Resonant power converters that replace the conventional impedance matching stage with series or parallel connections between resonant inverters and resonant rectifiers are provided. Two or more resonant rectifiers can be connected in series or in parallel to the resonant inverter to provide impedance matching. Similarly, two or more resonant inverters can be connected in series or in parallel to the resonant rectifier to provide impedance matching. Electrical isolation of DC voltage between input and output is provided using only capacitors.Type: GrantFiled: February 11, 2019Date of Patent: December 1, 2020Assignee: The Board of Trustees of the Leland Stanford Junior UniversityInventors: Luke C. Raymond, Wei Liang, Juan M. Rivas Davila
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Publication number: 20200313560Abstract: A resonant DC-DC converter for generating high voltage MHz bi-polar DC pulses includes a left multi-level resonant rectifier bank [100] connected to a positive electrode [104] and coupled via capacitive isolation to a left RF amplifier terminal [128]; a right multi-level resonant rectifier bank [102] connected to a negative electrode [106] and coupled via capacitive isolation to a right RF amplifier terminal [130]. Each multi-level resonant rectifier bank comprises multiple resonant rectifier stages [112-122], where each stage comprises two capacitors for capacitively isolating the stage, an output capacitor, a MOSFET switch connected to an adjacent MOSFET switch of an adjacent stage, and a gating resonant circuit connected to the MOSFET switch, whereby MOSFET switches in the banks can be passively controlled by RF signals from a left RF amplifier and a right RF amplifier.Type: ApplicationFiled: June 26, 2017Publication date: October 1, 2020Inventors: Luke C. Raymond, Wei Liang, Kawin Surakitbovorn, Juan M. Rivas Davila
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Publication number: 20190334441Abstract: Resonant power converters that replace the conventional impedance matching stage with series or parallel connections between resonant inverters and resonant rectifiers are provided. Two or more resonant rectifiers can be connected in series or in parallel to the resonant inverter to provide impedance matching. Similarly, two or more resonant inverters can be connected in series or in parallel to the resonant rectifier to provide impedance matching. Electrical isolation of DC voltage between input and output is provided using only capacitors.Type: ApplicationFiled: February 11, 2019Publication date: October 31, 2019Inventors: Luke C. Raymond, Wei Liang, Juan M. Rivas Davila
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Patent number: 10218276Abstract: Resonant power converters that replace the conventional impedance matching stage with series or parallel connections between resonant inverters and resonant rectifiers are provided. Two or more resonant rectifiers can be connected in series or in parallel to the resonant inverter to provide impedance matching. Similarly, two or more resonant inverters can be connected in series or in parallel to the resonant rectifier to provide impedance matching. Electrical isolation of DC voltage between input and output is provided using only capacitors.Type: GrantFiled: June 30, 2016Date of Patent: February 26, 2019Assignee: The Board of Trustees of the Leland Stanford Junior UniversityInventors: Luke C. Raymond, Wei Liang, Juan M. Rivas Davila
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Publication number: 20190013670Abstract: Improved control of electrical power consumption is provided with “Smart Dim Fuses” (SDF) which can alter their output voltage as provided to the load circuits they are connected to. SDF units can replace conventional circuit breakers in electrical panels. The voltage control capability provided by SDF units can lead to improved control of electrical power consumption, since many loads can smoothly operate at lower power consumption when the voltage they are driven with decreases. SDF units can comply with relevant safety requirements, such as uninterrupted neutral connections between electrical mains and load circuits. SDF units can also provide a current limiting function that can substitute for the protective action of conventional circuit breakers.Type: ApplicationFiled: July 9, 2018Publication date: January 10, 2019Inventors: Aaron Sargent Goldin, Ram Rajagopal, Claudio Rivetta, Juan M. Rivas Davila
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Publication number: 20170287633Abstract: Precision fabrication of 3D objects is used for fabricating passive electrical components. A 3D scaffold is fabricated and then electrically conductive and/or insulating layers are deposited on the scaffold to form the electrical component.Type: ApplicationFiled: September 2, 2015Publication date: October 5, 2017Inventors: Juan M. Rivas Davila, Wei Liang, Luke C. Raymond
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Publication number: 20170012535Abstract: Resonant power converters that replace the conventional impedance matching stage with series or parallel connections between resonant inverters and resonant rectifiers are provided. Two or more resonant rectifiers can be connected in series or in parallel to the resonant inverter to provide impedance matching. Similarly, two or more resonant inverters can be connected in series or in parallel to the resonant rectifier to provide impedance matching. Electrical isolation of DC voltage between input and output is provided using only capacitors.Type: ApplicationFiled: June 30, 2016Publication date: January 12, 2017Inventors: Luke C. Raymond, Wei Liang, Juan M. Rivas Davila