Patents by Inventor Jialei Xu
Jialei Xu 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: 11977201Abstract: The invention discloses an integrated detection method of electromagnetic searching, locating and tracking for subsea cables. After being launched into water, the cable-tracking AUV carries out primary Z-shaped reciprocating sailing to search the electromagnetic signal of the target subsea cable, when the electromagnetic signal reaches a preset threshold value, the AUV executes the cable-tracking detection. In the tracking process, if the target electromagnetic signal intensity is lower than the preset threshold, it is determined that subsea cable tracking is lost. At this time, the secondary Z-shaped cable-researching route planning and tracking are performed based on the lost point. In the process that the AUV autonomously tracks and detects the subsea cable, relative locating between AUV and subsea cable is performed based on the electromagnetic signal radiated by the subsea cable, and autonomous tracking control under the guidance of the electromagnetic locating signal is performed.Type: GrantFiled: June 10, 2022Date of Patent: May 7, 2024Assignee: HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGYInventors: Xianbo Xiang, Jialei Zhang, Shaolong Yang, Qin Zhang, Gong Xiang, Guohua Xu
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METHOD FOR PREPARING REFRACTORY MATERIAL FROM WASTE BATTERY RESIDUES, AND USE OF REFRACTORY MATERIAL
Publication number: 20240055682Abstract: A method for preparing a refractory material from waste battery residues. The method comprises the following steps: (1) disassembling waste batteries, then sorting same to obtain positive and negative electrode powders, leaching the positive and negative electrode powders with an acid, filtering same to obtain a graphite slag, and then subjecting the filtrate to copper removal, followed by the addition of an alkali for a precipitation reaction, wherein the resulting precipitate is an iron-aluminum slag; (2) wrapping the graphite slag obtained in step (1) with wet clay to form an inner core material, then mixing wet clay with the iron-aluminum slag, wrapping the inner core material with same, and aging the wrapped inner core material to obtain a blank; (3) pre-sintering, calcining and cooling the blank prepared in step (2) to obtain a fired product; and (4) washing and drying the fired product to obtain the refractory material.Type: ApplicationFiled: August 11, 2022Publication date: February 15, 2024Applicants: GUANGDONG BRUNP RECYCLING TECHNOLOGY CO., LTD., HUNAN BRUNP RECYCLING TECHNOLOGY CO., LTD., HUNAN BRUNP EV RECYCLING CO., LTD.Inventors: Haijun YU, Jiangdong CHEN, Yinghao XIE, Jialei XU, Benben WU, Changdong LI -
Patent number: 11557964Abstract: An apparatus is disclosed for operating a charge pump in a high-efficiency low-ripple burst mode. In an example aspect, the apparatus includes a charge pump with a flying capacitor, a switching circuit, and a burst-mode controller. The switching circuit is coupled to the flying capacitor and configured to selectively: be in a burst configuration to charge and discharge the flying capacitor based on a clock signal; or be in a pulse-skipping configuration. The burst-mode controller is coupled to the switching circuit and configured to trigger the switching circuit to transition from the pulse-skipping configuration to the burst configuration at a time that occurs between rising edges of the clock signal. The burst-mode controller is also configured to cause charging of the flying capacitor to occur for approximately half a period of the clock signal responsive to triggering the switching circuit to transition from the pulse-skipping configuration to the burst configuration.Type: GrantFiled: May 28, 2021Date of Patent: January 17, 2023Assignee: QUALCOMM IncorporatedInventors: Stuart Pullen, Jialei Xu, Chunping Song, Ta-Tung Yen
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Publication number: 20210376719Abstract: An apparatus is disclosed for operating a charge pump in a high-efficiency low-ripple burst mode. In an example aspect, the apparatus includes a charge pump with a flying capacitor, a switching circuit, and a burst-mode controller. The switching circuit is coupled to the flying capacitor and configured to selectively: be in a burst configuration to charge and discharge the flying capacitor based on a clock signal; or be in a pulse-skipping configuration. The burst-mode controller is coupled to the switching circuit and configured to trigger the switching circuit to transition from the pulse-skipping configuration to the burst configuration at a time that occurs between rising edges of the clock signal. The burst-mode controller is also configured to cause charging of the flying capacitor to occur for approximately half a period of the clock signal responsive to triggering the switching circuit to transition from the pulse-skipping configuration to the burst configuration.Type: ApplicationFiled: May 28, 2021Publication date: December 2, 2021Inventors: Stuart Pullen, Jialei Xu, Chunping Song, Ta-Tung Yen
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Patent number: 10812034Abstract: In an actuator driver array, each actuator driver includes a transition stage to initiate a state change of a driver output signal, a static stage to maintain the state change, and an isolation resistor to couple the driver output signal to an output node of the actuator driver during a static mode. In an array of pad capacitors, each pad capacitor has: a first terminal at a connector pad communicatively coupled to the output node; and a second terminal coupled to an RF ground rail. The isolation resistor and the pad capacitor form a low-pass filter to filter RF harmonics from a respective actuator driver to respective actuator circuitry, and to filter RF energy generated outside of the respective actuator driver to its output node. In an RF actuator array, a state of each element is controllable by a corresponding actuator driver in the actuator driver array.Type: GrantFiled: September 16, 2019Date of Patent: October 20, 2020Assignee: TEXAS INSTRUMENTS INCORPORATEDInventors: Michael John Shay, Jialei Xu, Randy A. Chappel
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Publication number: 20200014357Abstract: In an actuator driver array, each actuator driver includes a transition stage to initiate a state change of a driver output signal, a static stage to maintain the state change, and an isolation resistor to couple the driver output signal to an output node of the actuator driver during a static mode. In an array of pad capacitors, each pad capacitor has: a first terminal at a connector pad communicatively coupled to the output node; and a second terminal coupled to an RF ground rail. The isolation resistor and the pad capacitor form a low-pass filter to filter RF harmonics from a respective actuator driver to respective actuator circuitry, and to filter RF energy generated outside of the respective actuator driver to its output node. In an RF actuator array, a state of each element is controllable by a corresponding actuator driver in the actuator driver array.Type: ApplicationFiled: September 16, 2019Publication date: January 9, 2020Inventors: Michael John Shay, Jialei Xu, Randy A. Chappel
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Patent number: 10523042Abstract: Certain aspects of the present disclosure generally relate to reducing the size of parallel charging circuits for charging a battery in a portable device, while still effectively providing input current sensing and reverse current blocking capabilities. One example battery charging circuit generally includes: (1) a first charging circuit comprising a first charging output connectable to a battery and a first converter to provide power to the first charging output; and (2) a second charging circuit comprising a second charging output connectable to the battery, a second converter to provide power to the second charging output, a first transistor coupled between an output of the second converter and the second charging output, and a current-sensing circuit coupled to the output of the second converter to sense a current through the first transistor.Type: GrantFiled: September 22, 2017Date of Patent: December 31, 2019Assignee: QUALCOMM IncorporatedInventors: Chunping Song, Jialei Xu, Stuart Pullen, Steve Hawley, Neal Horovitz, Shashank Prakash Mane
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Patent number: 10418961Abstract: In an actuator driver array, each actuator driver includes a transition stage to initiate a state change of a driver output signal, a static stage to maintain the state change, and an isolation resistor to couple the driver output signal to an output node of the actuator driver during a static mode. In an array of pad capacitors, each pad capacitor has: a first terminal at a connector pad communicatively coupled to the output node; and a second terminal coupled to an RF ground rail. The isolation resistor and the pad capacitor form a low-pass filter to filter RF harmonics from a respective actuator driver to respective actuator circuitry, and to filter RF energy generated outside of the respective actuator driver to its output node. In an RF actuator array, a state of each element is controllable by a corresponding actuator driver in the actuator driver array.Type: GrantFiled: November 10, 2017Date of Patent: September 17, 2019Assignee: TEXAS INSTRUMENTS INCORPORATEDInventors: Michael John Shay, Jialei Xu, Randy A. Chappel
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Patent number: 10270342Abstract: Certain aspects of the present disclosure provide methods and apparatus for current sensing and error correction, or at least adjustment, for a switching regulator. One example current-sensing circuit generally includes a first amplifier, a buffer, a low-pass filter, a first switch coupled between an output of the first amplifier and an input of the buffer, a second switch coupled between the output of the first amplifier and an input of the low-pass filter, a third switch coupled between an output of the buffer and the input of the low-pass filter, and a fourth switch coupled between the input of the low-pass filter and a reference node for the circuit.Type: GrantFiled: May 8, 2018Date of Patent: April 23, 2019Assignee: QUALCOMM IncorporatedInventors: Stuart Pullen, Michael Bui, Chunping Song, Jialei Xu
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Publication number: 20180331624Abstract: Certain aspects of the present disclosure provide methods and apparatus for current sensing and error correction, or at least adjustment, for a switching regulator. One example current-sensing circuit generally includes a first amplifier, a buffer, a low-pass filter, a first switch coupled between an output of the first amplifier and an input of the buffer, a second switch coupled between the output of the first amplifier and an input of the low-pass filter, a third switch coupled between an output of the buffer and the input of the low-pass filter, and a fourth switch coupled between the input of the low-pass filter and a reference node for the circuit.Type: ApplicationFiled: May 8, 2018Publication date: November 15, 2018Inventors: Stuart PULLEN, Michael BUI, Chunping SONG, Jialei XU
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Publication number: 20180331564Abstract: Certain aspects of the present disclosure generally relate to reducing the size of parallel charging circuits for charging a battery in a portable device, while still effectively providing input current sensing and reverse current blocking capabilities. One example battery charging circuit generally includes: (1) a first charging circuit comprising a first charging output connectable to a battery and a first converter to provide power to the first charging output; and (2) a second charging circuit comprising a second charging output connectable to the battery, a second converter to provide power to the second charging output, a first transistor coupled between an output of the second converter and the second charging output, and a current-sensing circuit coupled to the output of the second converter to sense a current through the first transistor.Type: ApplicationFiled: September 22, 2017Publication date: November 15, 2018Inventors: Chunping SONG, Jialei XU, Stuart PULLEN, Steve HAWLEY, Neal HOROVITZ, Shashank Prakash MANE
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Patent number: 10033271Abstract: In described examples, a multi-stage charge pump includes first, second and third charge pump stages connected in series. Each of the first, second and third charge pump stages includes a charge pump circuit of a first type that increases an input signal of a respective charge pump circuit by up to a given amount. The multi-stage charge pump also includes a level shifter that swings a level clock signal between a voltage of an output signal of the third charge pump stage and one of an offset voltage and ground. The multi-stage charge pump further includes a charge pump circuit of a second type that increases the voltage of the output of the third charge pump stage by up to another amount and provides an output and the other amount is set by the level shifter. Also, the multi-stage charge pump includes a charge pump circuit of a third type.Type: GrantFiled: December 30, 2016Date of Patent: July 24, 2018Assignee: TEXAS INSTRUMENTS INCORPORATEDInventors: Michael John Shay, Jialei Xu
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Publication number: 20180191243Abstract: In described examples, a multi-stage charge pump includes first, second and third charge pump stages connected in series. Each of the first, second and third charge pump stages includes a charge pump circuit of a first type that increases an input signal of a respective charge pump circuit by up to a given amount. The multi-stage charge pump also includes a level shifter that swings a level clock signal between a voltage of an output signal of the third charge pump stage and one of an offset voltage and ground. The multi-stage charge pump further includes a charge pump circuit of a second type that increases the voltage of the output of the third charge pump stage by up to another amount and provides an output and the other amount is set by the level shifter. Also, the multi-stage charge pump includes a charge pump circuit of a third type.Type: ApplicationFiled: December 30, 2016Publication date: July 5, 2018Inventors: MICHAEL JOHN SHAY, JIALEI XU
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Publication number: 20180091110Abstract: In an actuator driver array, each actuator driver includes a transition stage to initiate a state change of a driver output signal, a static stage to maintain the state change, and an isolation resistor to couple the driver output signal to an output node of the actuator driver during a static mode. In an array of pad capacitors, each pad capacitor has: a first terminal at a connector pad communicatively coupled to the output node; and a second terminal coupled to an RF ground rail. The isolation resistor and the pad capacitor form a low-pass filter to filter RF harmonics from a respective actuator driver to respective actuator circuitry, and to filter RF energy generated outside of the respective actuator driver to its output node. In an RF actuator array, a state of each element is controllable by a corresponding actuator driver in the actuator driver array.Type: ApplicationFiled: November 10, 2017Publication date: March 29, 2018Inventors: Michael John Shay, Jialei Xu, Randy A. Chappel
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Patent number: 9887680Abstract: A dual-mode driver includes a transition stage and a static stage. The transition stage switches a bias voltage or an RF ground potential to an output pad to change the state of an RF actuator device connected at the output pad. After waiting a predetermined period of time for the RF actuator device to change state, the transition stage of the driver is disabled. A high-side or low-side static stage transistor maintains the driver output state through an isolation resistor. The isolation resistor and a capacitor formed at the driver output pad form an RC low-pass filter to block spurious noise generated at the driver. The RC filter also blocks RF energy that might otherwise enter the actuator driver from the actuator. Some embodiments also include a second RC filter located proximate to the output pad to prevent RF energy generated in the RF actuator from entering the driver.Type: GrantFiled: December 2, 2014Date of Patent: February 6, 2018Assignee: TEXAS INSTRUMENTS INCORPORATEDInventors: Michael John Shay, Jialei Xu, Randy A. Chappel
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Publication number: 20160156337Abstract: A dual-mode driver includes a transition stage and a static stage. The transition stage switches a bias voltage or an RF ground potential to an output pad to change the state of an RF actuator device connected at the output pad. After waiting a predetermined period of time for the RF actuator device to change state, the transition stage of the driver is disabled. A high-side or low-side static stage transistor maintains the driver output state through an isolation resistor. The isolation resistor and a capacitor formed at the driver output pad form an RC low-pass filter to block spurious noise generated at the driver. The RC filter also blocks RF energy that might otherwise enter the actuator driver from the actuator. Some embodiments also include a second RC filter located proximate to the output pad to prevent RF energy generated in the RF actuator from entering the driver.Type: ApplicationFiled: December 2, 2014Publication date: June 2, 2016Inventors: Michael John Shay, Jialei Xu, Randy A. Chappel