Patents by Inventor Xiaofei Qiu
Xiaofei Qiu 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: 11965037Abstract: Provided is an anti-HER3 humanized monoclonal antibody. The antibody binds HER3 antigen, has high affinity and biological activity and low immunogenicity, and is stable in structure. The antibody can be used for preparing drugs for preventing or treating HER3-related diseases.Type: GrantFiled: July 17, 2019Date of Patent: April 23, 2024Assignee: SHANGHAI INSTITUTE OF BIOLOGICAL PRODUCTS CO., LTD.Inventors: Aidong Qu, Hongyuan Liang, Fanhong Xu, Aoxiang Li, Lina Wu, Jingye Zhu, Jianhua Qiu, Jin Lu, Lin Zhang, Xin Zhao, Xiaofei Song
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Publication number: 20240067115Abstract: A control circuit includes (i) at least one voltage output end, each said voltage output end being connected to a filter capacitor, (ii) at least one detection circuit disposed in the control circuit, each said detection circuit being connected to one said voltage output end, and (iii) a fault output apparatus which is configured to, when the detection circuit detects that a fault has occurred in the filter capacitor connected to the voltage output end, output corresponding filter capacitor fault indication information. The power supply output apparatus has no need for a redundant capacitor design, and can determine whether a fault has occurred in the filter capacitor on the basis of the duration of charging of the filter capacitor thus ensuring the reliability and stability of the power supply output apparatus.Type: ApplicationFiled: November 11, 2021Publication date: February 29, 2024Inventor: Xiaofei Qiu
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Publication number: 20240067116Abstract: A capacitor charging circuit, comprising: a charging power supply, for outputting a charging voltage; a voltage comparison module, connected to the charging power supply, and configured to output a drive signal indicating charging upon judging that the charging voltage is higher than a preset threshold; a current adjustment module, connected to the voltage comparison module and the charging power supply separately, the charging current adjustment module receiving the drive signal and, upon receiving the drive signal indicating charging, causing the charging power supply to charge the capacitor with a maximum charging current. The present application enables adjustment of the charging current of the charging capacitor according to the power supply voltage, thus increasing the charging speed.Type: ApplicationFiled: January 3, 2022Publication date: February 29, 2024Inventor: Xiaofei Qiu
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Publication number: 20230347844Abstract: An ignition resistance test circuit for an airbag is disclosed. The test circuit includes (i) an ignition resistor, (ii) a current source circuit for providing a test current for testing the ignition resistor, (iii) a current drain circuit for receiving the test current, (iv) a differential amplification circuit for differentially amplifying the voltage at the two ends of the ignition resistor, thus obtaining a voltage drop after differential amplification, and (v) an analogue-to-digital conversion circuit for performing analogue-to-digital conversion of the differentially amplified voltage drop to provide to a control unit, enabling the control unit to determine the resistance value of the ignition resistor based on the voltage drop and the test current. An airbag controller and an airbag is also disclosed.Type: ApplicationFiled: April 26, 2023Publication date: November 2, 2023Inventors: Ruediger Karner, Xiaofei Qiu
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Patent number: 11800608Abstract: A defrosting system includes an RF signal source, one or more electrodes proximate to a cavity within which a load to be defrosted is positioned, a transmission path between the RF signal source and the electrode(s), and an impedance matching network electrically coupled along the transmission path between the output of the RF signal source and the electrode(s). The system also includes measurement circuitry coupled to the transmission path and configured to measure one or more parameters that include voltage, current, forward signal power, reflected signal power, and S11 along the transmission path. A system controller is configured to monitor the measurements, and to modify operation of the system when a rate of change of any of the monitored parameter(s) exceeds a predetermined threshold. The impedance matching network may be a single-ended network or a double-ended network.Type: GrantFiled: September 14, 2018Date of Patent: October 24, 2023Assignee: NXP USA, Inc.Inventors: Minyang Ma, Xiaofei Qiu, Lionel Mongin
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Patent number: 11632829Abstract: A defrosting system includes an RF signal source, an electrode proximate to a cavity within which a load to be defrosted is positioned, and a transmission path between the RF signal source and the electrode. The system also includes power detection circuitry coupled to the transmission path and configured repeatedly to take forward and reflected RF power measurements along the transmission path. A system controller repeatedly determines, based on the forward and reflected RF power measurements, a calculated rate of change, and repeatedly compares the calculated rate of change to a threshold rate of change. When the calculated rate of change compares favorably with the threshold rate of change, the RF signal source continues to provide the RF signal to the electrode until a determination is made that the defrosting operation is completed, at which time the RF signal source ceases to provide the RF signal to the electrode.Type: GrantFiled: March 7, 2020Date of Patent: April 18, 2023Assignee: NXP USA, Inc.Inventors: James Eric Scott, Jérémie Simon, Xiaofei Qiu, Lionel Mongin, Pierre Marie Jean Piel
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Patent number: 11382190Abstract: A defrosting system includes an RF signal source, two electrodes proximate to a cavity within which a load to be defrosted is positioned, a transmission path between the RF signal source and the electrodes, and an impedance matching network electrically coupled along the transmission path between the output of the RF signal source and the electrodes. The system also includes power detection circuitry coupled to the transmission path and configured to detect reflected signal power along the transmission path. A system controller is configured to modify, based on the reflected signal power, a value of a variable passive component of the impedance matching network to reduce the reflected signal power. The impedance matching network may be a single-ended network or a double-ended network.Type: GrantFiled: March 16, 2018Date of Patent: July 5, 2022Assignee: NXP USA, Inc.Inventors: Pierre Marie Jean Piel, Lionel Mongin, Jérémie Simon, James Eric Scott, Xiaofei Qiu
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Patent number: 11039512Abstract: A defrosting system includes an RF signal source, an electrode proximate to a cavity within which a load to be defrosted is positioned, a transmission path between the RF signal source and the electrode, and an impedance matching network electrically coupled along the transmission path between the output of the RF signal source and the electrode. The system also includes power detection circuitry coupled to the transmission path and configured to detect reflected signal power along the transmission path. A system controller is configured to modify, based on the reflected signal power, an inductance value of the impedance matching network to reduce a ratio of the reflected signal power to the forward signal power. The impedance matching network includes a plurality of fixed-value, lumped inductors positioned within a fixed inductor area.Type: GrantFiled: March 10, 2017Date of Patent: June 15, 2021Assignee: NXP USA, Inc.Inventors: Xiaofei Qiu, James Eric Scott, Lionel Mongin, Jérémie Simon, Pierre Marie Jean Piel
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Patent number: 10952289Abstract: A defrosting system includes an RF signal source, one or more electrodes proximate to a cavity within which a load to be defrosted is positioned, a transmission path between the RF signal source and the electrode(s), and an impedance matching network electrically coupled along the transmission path between the RF signal source output and the electrode(s). A system controller is configured to modify, based on the reflected signal power, values of variable passive components of the impedance matching network to reduce the reflected signal power. The system controller may be configured to estimate the mass of the load by comparing component value(s) of one or more variable passive components of the impedance matching network with a component value table stored in memory, where stored mass values correspond to the stored component values. Desired signal parameters for the RF signal may be determined based on the estimated mass of the load.Type: GrantFiled: September 10, 2018Date of Patent: March 16, 2021Assignee: NXP USA, Inc.Inventors: Xiaofei Qiu, Lionel Mongin, James Eric Scott, Pierre Marie Jean Piel
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Patent number: 10785834Abstract: A radio frequency (RF) heating and defrosting apparatus may include an electrode which, when supplied with RF signal energy, may responsively radiate electromagnetic energy into a cavity of the RF heating and defrosting apparatus. This radiated electromagnetic energy may cause a thermal increase of a load in the cavity. A capacitor may be formed from a portion of the electrode and a conductive plate disposed adjacent to the electrode. The conductive plate may be coupled to a ground reference structure. Dielectric material(s) having a low dielectric constant may be disposed directly between the electrode and the conductive plate.Type: GrantFiled: December 15, 2017Date of Patent: September 22, 2020Assignee: NXP USA, Inc.Inventors: Lionel Mongin, Pierre Marie Jean Piel, Xiaofei Qiu
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Publication number: 20200214094Abstract: A defrosting system includes an RF signal source, an electrode proximate to a cavity within which a load to be defrosted is positioned, and a transmission path between the RF signal source and the electrode. The system also includes power detection circuitry coupled to the transmission path and configured repeatedly to take forward and reflected RF power measurements along the transmission path. A system controller repeatedly determines, based on the forward and reflected RF power measurements, a calculated rate of change, and repeatedly compares the calculated rate of change to a threshold rate of change. When the calculated rate of change compares favorably with the threshold rate of change, the RF signal source continues to provide the RF signal to the electrode until a determination is made that the defrosting operation is completed, at which time the RF signal source ceases to provide the RF signal to the electrode.Type: ApplicationFiled: March 7, 2020Publication date: July 2, 2020Inventors: James Eric Scott, Jérémie Simon, Xiaofei Qiu, Lionel Mongin, Pierre Marie Jean Piel
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Patent number: 10616963Abstract: A defrosting system includes an RF signal source, an electrode proximate to a cavity within which a load to be defrosted is positioned, and a transmission path between the RF signal source and the electrode. The system also includes power detection circuitry coupled to the transmission path and configured repeatedly to take forward and reflected RF power measurements along the transmission path. A system controller repeatedly determines, based on the forward and reflected RF power measurements, a calculated rate of change, and repeatedly compares the calculated rate of change to a threshold rate of change. When the calculated rate of change compares favorably with the threshold rate of change, the RF signal source continues to provide the RF signal to the electrode until a determination is made that the defrosting operation is completed, at which time the RF signal source ceases to provide the RF signal to the electrode.Type: GrantFiled: March 9, 2017Date of Patent: April 7, 2020Assignee: NXP USA, Inc.Inventors: James Eric Scott, Jérémie Simon, Xiaofei Qiu, Lionel Mongin, Pierre Marie Jean Piel
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Publication number: 20200092957Abstract: A defrosting system includes an RF signal source, one or more electrodes proximate to a cavity within which a load to be defrosted is positioned, a transmission path between the RF signal source and the electrode(s), and an impedance matching network electrically coupled along the transmission path between the output of the RF signal source and the electrode(s). The system also includes measurement circuitry coupled to the transmission path and configured to measure one or more parameters that include voltage, current, forward signal power, reflected signal power, and S11 along the transmission path. A system controller is configured to monitor the measurements, and to modify operation of the system when a rate of change of any of the monitored parameter(s) exceeds a predetermined threshold. The impedance matching network may be a single-ended network or a double-ended network.Type: ApplicationFiled: September 14, 2018Publication date: March 19, 2020Inventors: Minyang MA, Xiaofei QIU, Lionel MONGIN
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Publication number: 20200084844Abstract: A defrosting system includes an RF signal source, one or more electrodes proximate to a cavity within which a load to be defrosted is positioned, a transmission path between the RF signal source and the electrode(s), and an impedance matching network electrically coupled along the transmission path between the RF signal source output and the electrode(s). A system controller is configured to modify, based on the reflected signal power, values of variable passive components of the impedance matching network to reduce the reflected signal power. The system controller may be configured to estimate the mass of the load by comparing component value(s) of one or more variable passive components of the impedance matching network with a component value table stored in memory, where stored mass values correspond to the stored component values. Desired signal parameters for the RF signal may be determined based on the estimated mass of the load.Type: ApplicationFiled: September 10, 2018Publication date: March 12, 2020Inventors: Xiaofei QIU, Lionel MONGIN, James Eric SCOTT, Pierre Marie Jean PIEL
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Patent number: 10412795Abstract: A device includes an output circuit that includes an input port at which a signal is received, an output port at which an impedance-adjusted representation of the signal is provided, and a set of bond wires connecting the input and output ports. The device further includes first and second couplers, each including a respective coupling bond wire along the set of bond wires for inductive coupling with the set of bond wires. The first coupler is oriented relative to the distributed-element output circuit to measure forward power provided by the impedance-adjusted representation of the signal via the output port. The second coupler is oriented relative to the output circuit to measure reflected power received via the output port.Type: GrantFiled: April 28, 2017Date of Patent: September 10, 2019Assignee: NXP USA, Inc.Inventors: Xiaofei Qiu, Lionel Mongin, Pierre Piel
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Publication number: 20190191501Abstract: A defrosting system includes an RF signal source, two electrodes proximate to a cavity within which a load to be defrosted is positioned, a transmission path between the RF signal source and the electrodes, and an impedance matching network electrically coupled along the transmission path between the output of the RF signal source and the electrodes. The system also includes power detection circuitry coupled to the transmission path and configured to detect reflected signal power along the transmission path. A system controller is configured to modify, based on the reflected signal power, a value of a variable passive component of the impedance matching network to reduce the reflected signal power. The impedance matching network may be a single-ended network or a double-ended network.Type: ApplicationFiled: March 16, 2018Publication date: June 20, 2019Inventors: Pierre Marie Jean PIEL, Lionel MONGIN, Jérémie SIMON, James Eric SCOTT, Xiaofei QIU
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Publication number: 20190191500Abstract: A radio frequency (RF) heating and defrosting apparatus may include an electrode which, when supplied with RF signal energy, may responsively radiate electromagnetic energy into a cavity of the RF heating and defrosting apparatus. This radiated electromagnetic energy may cause a thermal increase of a load in the cavity. A capacitor may be formed from a portion of the electrode and a conductive plate disposed adjacent to the electrode. The conductive plate may be coupled to a ground reference structure. Dielectric material(s) having a low dielectric constant may be disposed directly between the electrode and the conductive plate.Type: ApplicationFiled: December 15, 2017Publication date: June 20, 2019Inventors: Lionel MONGIN, Pierre Marie Jean PIEL, Xiaofei QIU
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Publication number: 20180317288Abstract: A device includes an output circuit that includes an input port at which a signal is received, an output port at which an impedance-adjusted representation of the signal is provided, and a set of bond wires connecting the input and output ports. The device further includes first and second couplers, each including a respective coupling bond wire along the set of bond wires for inductive coupling with the set of bond wires. The first coupler is oriented relative to the distributed-element output circuit to measure forward power provided by the impedance-adjusted representation of the signal via the output port. The second coupler is oriented relative to the output circuit to measure reflected power received via the output port.Type: ApplicationFiled: April 28, 2017Publication date: November 1, 2018Inventors: Xiaofei Qiu, Lionel Mongin, Pierre Piel
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Publication number: 20180042074Abstract: A defrosting system includes an RF signal source, an electrode proximate to a cavity within which a load to be defrosted is positioned, a transmission path between the RF signal source and the electrode, and an impedance matching network electrically coupled along the transmission path between the output of the RF signal source and the electrode. The system also includes power detection circuitry coupled to the transmission path and configured to detect reflected signal power along the transmission path. A system controller is configured to modify, based on the reflected signal power, an inductance value of the impedance matching network to reduce a ratio of the reflected signal power to the forward signal power. The impedance matching network includes a plurality of fixed-value, lumped inductors positioned within a fixed inductor area.Type: ApplicationFiled: March 10, 2017Publication date: February 8, 2018Inventors: Xiaofei Qiu, James Eric Scott, Lionel Mongin, Jérémie Simon, Pierre Marie Jean Piel
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Patent number: D1020410Type: GrantFiled: November 26, 2021Date of Patent: April 2, 2024Assignee: SHENZHEN ZHENGLING TECHNOLOGY CO., LTD.Inventors: Xiaofei Qiu, Zhicheng Xie