Patents by Inventor Xiaofeng Lin

Xiaofeng Lin 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).

  • Patent number: 12212329
    Abstract: A device (e.g., SAR ADC device) include a DAC circuit and generates a digital output based on logic circuitry that includes SAR logic. Additional logic circuitry includes delta modulation circuitry and dynamic element matching circuitry. The delta modulation circuitry provides several digital outputs of the SAR DAC, while the dynamic element matching circuitry selects a different set of capacitors from the DAC circuit. Each cycle is added together and averaged, and then added to the digital output from the SAR logic.
    Type: Grant
    Filed: March 3, 2023
    Date of Patent: January 28, 2025
    Assignee: Avago Technologies International Sales Pte. Limited
    Inventors: Kareem Abdelghani Ibraheem Mohamed Ragab, Xiaofeng Lin, Darwin Cheung, Chi Mo, Vinay Chandrasekhar, Jungwoo Song, Xicheng Jiang
  • Publication number: 20240361182
    Abstract: An apparatus for detecting optical signals includes a photodetector. The photodetector is reverse-biased by a first voltage and a second voltage is added to the first voltage to provide an offset equal to the second voltage for the photodetector. A first circuit is coupled to the first circuit to provide the second voltage for the photodetector and a second circuit is coupled to the first circuit to provide the first voltage to the photodetector to reverse-bias the photodetector. The second circuit provides an output voltage proportional to a current of the photodetector at an output of the second circuit.
    Type: Application
    Filed: April 25, 2023
    Publication date: October 31, 2024
    Inventors: Junjie LU, Jing GUO, Leon Samuel WANG, Xiaofeng LIN, Xicheng Jiang
  • Publication number: 20240361180
    Abstract: An apparatus includes a first circuit that has a photodetector. The photodetector is reverse-biased by a reverse-bias voltage. A common mode voltage is added to the reverse-bias voltage to provide an offset to the photodetector voltage. A second circuit is coupled to the first circuit to provide the common mode voltage for the first circuit. A third circuit is coupled to the second circuit that includes a first voltage source and a second voltage source having opposite voltages equal to half of the reverse-bias voltage. Each one of the first voltage source and the second voltage source are coupled between separate input and output nodes of input and output ports of the third circuit. The first voltage source and the second voltage source provide the reverse-bias voltage to the first circuit to reverse-bias the photodetector. The third circuit provides a photodetector current at an output of the third circuit.
    Type: Application
    Filed: April 25, 2023
    Publication date: October 31, 2024
    Inventors: Junjie LU, Jing GUO, Leon Samuel WANG, Xiaofeng LIN, Xicheng JIANG
  • Patent number: 12123774
    Abstract: An apparatus for detecting optical signals includes a photodetector. The photodetector is reverse-biased by a first voltage and a second voltage is added to the first voltage to provide an offset equal to the second voltage for the photodetector. A first circuit is coupled to the first circuit to provide the second voltage for the photodetector and a second circuit is coupled to the first circuit to provide the first voltage to the photodetector to reverse-bias the photodetector. The second circuit provides an output voltage proportional to a current of the photodetector at an output of the second circuit.
    Type: Grant
    Filed: April 25, 2023
    Date of Patent: October 22, 2024
    Assignee: Avago Technologies International Sales Pte. Limited
    Inventors: Junjie Lu, Jing Guo, Leon Samuel Wang, Xiaofeng Lin, Xicheng Jiang
  • Publication number: 20240295444
    Abstract: An apparatus includes a switched-capacitor resistor that provides an equivalent resistance that can be used as a reference resistor. The switched-capacitor resistor includes a capacitor and a pair of switches that alternately switch (e.g., open and close) in order to charge and discharge the capacitor. The switching frequency of the switches can be controlled by a clock phase generator that generates non-overlapping pulses. To further control the frequency, a frequency locked loop circuit can also be used.
    Type: Application
    Filed: March 3, 2023
    Publication date: September 5, 2024
    Inventors: Kareem Abdelghani Ibraheem Mohamed RAGAB, Xiaofeng LIN, Darwin CHEUNG, Chi MO, Vinay CHANDRASEKHAR, Jungwoo SONG, Xicheng JIANG
  • Publication number: 20240297657
    Abstract: A device (e.g., SAR ADC device) include a DAC circuit and generates a digital output based on logic circuitry that includes SAR logic. Additional logic circuitry includes delta modulation circuitry and dynamic element matching circuitry. The delta modulation circuitry provides several digital outputs of the SAR DAC, while the dynamic element matching circuitry selects a different set of capacitors from the DAC circuit. Each cycle is added together and averaged, and then added to the digital output from the SAR logic.
    Type: Application
    Filed: March 3, 2023
    Publication date: September 5, 2024
    Inventors: Kareem Abdelghani Ibraheem Mohamed RAGAB, Xiaofeng LIN, Darwin CHEUNG, Chi MO, Vinay CHANDRASEKHAR, Jungwoo SONG, Xicheng JIANG
  • Publication number: 20240295445
    Abstract: An apparatus includes a temperature sensing circuit that includes both on-chip and off-chip components. The apparatus includes components that use the same source as a reference voltage, thus allowing variations in the reference voltage to be compensated for. Additionally, the apparatus can provide error averaging to compensate for deterministic error sources.
    Type: Application
    Filed: March 3, 2023
    Publication date: September 5, 2024
    Inventors: Kareem Abdelghani Ibraheem Mohamed RAGAB, Xiaofeng Lin, Darwin Cheung, Chi Mo, Vinay Chandrasekhar, Jungwoo Song, Xicheng Jiang
  • Patent number: 12023628
    Abstract: The present disclosure provides a drinking water purification system with a backwashable filter cartridge and a nanofiltration system. The drinking water purification system includes a backwashable pre-filtration unit, a nanofiltration unit and a cleaning unit. The backwashable pre-filtration unit is provided with a backwashable filter cartridge. The nanofiltration unit is provided with a nanofiltration filter cartridge. A water outflow side of the backwashable filter cartridge is connected to a water inflow side of the nanofiltration filter cartridge. The cleaning unit is connected to the water outflow side of the backwashable filter cartridge.
    Type: Grant
    Filed: October 14, 2021
    Date of Patent: July 2, 2024
    Assignee: Greentech Environment Co., Ltd.
    Inventors: Mu Liu, Xiaofeng Lin, Zehua Li, Yingqiang Su, Xiaohong Niu, Huiming Han, Xiaofang Zhang
  • Patent number: 11772995
    Abstract: A total nitrogen (TN) removal device for sewage and its operation method. The TN removal device includes a denitrification tank, a supplementary reaction zone filled with aerobic granular sludge and a sedimentation and separation zone. The supplementary reaction zone and the sedimentation and separation zone are arranged inside the denitrification tank, and communicated through a three-phase separator. The sedimentation and separation zone is located above the supplementary reaction zone. A top of the sedimentation and separation zone is greater than its bottom. A membrane aerated biofilm reactor (MABR) assembly is arranged in a space formed by outer walls of the sedimentation and separation zone and supplementary reaction zone and an inner chamber of the denitrification tank. A side wall of the denitrification tank is provided with a chemical oxygen demand (COD) detector and a nitrate nitrogen detector.
    Type: Grant
    Filed: March 25, 2023
    Date of Patent: October 3, 2023
    Assignee: Greentech Environment Co., Ltd.
    Inventors: Mu Liu, Mengyuan Duan, Zehua Li, Kai Sun, Yingqiang Su, Xikun Zhu, Huiming Han, Xiaofeng Lin, Jin Li
  • Patent number: 11772999
    Abstract: A system and method for treating reverse-osmosis (RO) concentrated water with high temporary hardness. The system includes a crystallization unit, a precipitation unit, a dewatering unit, and a programmable logic controller (PLC) system. The crystallization unit, precipitation unit and dewatering unit are connected in series, and the PLC system is configured to control pumps, valves, and displays in the crystallization unit, precipitation unit and dewatering unit. The crystallization unit includes a storage tank and a crystallization reactor communicated therewith. The crystallization reactor is provided with a pH meter, a liquid-level gauge, and a stirrer. A connection pipe between the crystallization reactor and the RO concentrated water is provided with an inlet pump and a inlet valve. A connection pipe between the crystallization reactor and the storage tank is provided with a feeding pump and a feeding valve.
    Type: Grant
    Filed: March 31, 2023
    Date of Patent: October 3, 2023
    Assignee: Greentech Environment Co., Ltd.
    Inventors: Mu Liu, Zehua Li, Mengyuan Duan, Huiming Han, Xiaofeng Lin, Yingqiang Su, Kai Sun, Xikun Zhu, Liyan Zhang
  • Patent number: 11760675
    Abstract: A system for treating printed circuit board wastewater (PCB) includes a production system, a pretreatment system, a biochemical system, a recovery system and a concentrated water treatment system. The production system is configured for producing process water and auxiliary water from tap water. The pretreatment system is configured to pretreat different wastewater samples separately. The biochemical system is configured to decompose the pretreated wastewater. The recovery system is configured to treat wastewater from the pretreatment system and the biochemical system to obtain process water and feed concentrated water to the concentrated water treatment system. The concentrated water treatment system is configured to treat the concentrated water to meet a discharge standard. A treatment method for the PCB wastewater is also provided.
    Type: Grant
    Filed: March 31, 2023
    Date of Patent: September 19, 2023
    Assignee: Greentech Environment Co., Ltd.
    Inventors: Mu Liu, Zehua Li, Huiming Han, Xiaofeng Lin, Yingqiang Su, Mengyuan Duan, Cong Xiao, Kai Sun, XiKun Zhu
  • Publication number: 20230234871
    Abstract: A system for treating printed circuit board wastewater (PCB) includes a production system, a pretreatment system, a biochemical system, a recovery system and a concentrated water treatment system. The production system is configured for producing process water and auxiliary water from tap water. The pretreatment system is configured to pretreat different wastewater samples separately. The biochemical system is configured to decompose the pretreated wastewater. The recovery system is configured to treat wastewater from the pretreatment system and the biochemical system to obtain process water and feed concentrated water to the concentrated water treatment system. The concentrated water treatment system is configured to treat the concentrated water to meet a discharge standard. A treatment method for the PCB wastewater is also provided.
    Type: Application
    Filed: March 31, 2023
    Publication date: July 27, 2023
    Inventors: Mu LIU, Zehua LI, Huiming HAN, Xiaofeng LIN, Yingqiang SU, Mengyuan DUAN, Cong XIAO, Kai SUN, XiKun ZHU
  • Publication number: 20230234870
    Abstract: A system and method for treating reverse-osmosis (RO) concentrated water with high temporary hardness. The system includes a crystallization unit, a precipitation unit, a dewatering unit, and a programmable logic controller (PLC) system. The crystallization unit, precipitation unit and dewatering unit are connected in series, and the PLC system is configured to control pumps, valves, and displays in the crystallization unit, precipitation unit and dewatering unit. The crystallization unit includes a storage tank and a crystallization reactor communicated therewith. The crystallization reactor is provided with a pH meter, a liquid-level gauge, and a stirrer. A connection pipe between the crystallization reactor and the RO concentrated water is provided with an inlet pump and a inlet valve. A connection pipe between the crystallization reactor and the storage tank is provided with a feeding pump and a feeding valve.
    Type: Application
    Filed: March 31, 2023
    Publication date: July 27, 2023
    Inventors: Mu LIU, Zehua LI, Mengyuan DUAN, Huiming HAN, Xiaofeng LIN, Yingqiang SU, Kai SUN, Xikun ZHU, Liyan ZHANG
  • Publication number: 20230227341
    Abstract: A total nitrogen (TN) removal device for sewage and its operation method. The TN removal device includes a denitrification tank, a supplementary reaction zone filled with aerobic granular sludge and a sedimentation and separation zone. The supplementary reaction zone and the sedimentation and separation zone are arranged inside the denitrification tank, and communicated through a three-phase separator. The sedimentation and separation zone is located above the supplementary reaction zone. A top of the sedimentation and separation zone is greater than its bottom. A membrane aerated biofilm reactor (MABR) assembly is arranged in a space formed by outer walls of the sedimentation and separation zone and supplementary reaction zone and an inner chamber of the denitrification tank. A side wall of the denitrification tank is provided with a chemical oxygen demand (COD) detector and a nitrate nitrogen detector.
    Type: Application
    Filed: March 25, 2023
    Publication date: July 20, 2023
    Inventors: Mu LIU, Mengyuan DUAN, Zehua LI, Kai SUN, Yingqiang SU, Xikun ZHU, Huiming HAN, Xiaofeng LIN, Jin LI
  • Publication number: 20220388866
    Abstract: The present disclosure provides a drinking water purification system with a backwashable filter cartridge and a nanofiltration system. The drinking water purification system includes a backwashable pre-filtration unit, a nanofiltration unit and a cleaning unit. The backwashable pre-filtration unit is provided with a backwashable filter cartridge. The nanofiltration unit is provided with a nanofiltration filter cartridge. A water outflow side of the backwashable filter cartridge is connected to a water inflow side of the nanofiltration filter cartridge. The cleaning unit is connected to the water outflow side of the backwashable filter cartridge.
    Type: Application
    Filed: October 14, 2021
    Publication date: December 8, 2022
    Inventors: Mu LIU, Xiaofeng LIN, Zehua LI, Yingqiang SU, Xiaohong NIU, Huiming HAN, Xiaofang ZHANG
  • Patent number: 11440819
    Abstract: A dosing control method for micro-flocculation in ultrafiltration, including: calculating a preset value of a first differential pressure before an initial backwash and a preset value of a second differential pressure before a final backwash in each chemically enhanced backwash cycle; calculating a preset value of a third differential pressure between the first differential pressure and the second differential pressure according to the preset value of the first differential pressure and the preset value of the second differential pressure; obtaining a predicted value of the third differential pressure according to a differential pressure curve plotted based on online filtration differential pressure data; and comparing the preset value of the third differential pressure and the predicted value of the third differential pressure to determine whether to dose. A dosing control system is also provided.
    Type: Grant
    Filed: March 24, 2022
    Date of Patent: September 13, 2022
    Assignee: Greentech Environment Co., Ltd.
    Inventors: Mu Liu, Yingqiang Su, Zehua Li, Kai Sun, Xiaofeng Lin, Huiming Han, Mengyuan Duan, Liyan Zhang
  • Publication number: 20220212963
    Abstract: A dosing control method for micro-flocculation in ultrafiltration, including: calculating a preset value of a first differential pressure before an initial backwash and a preset value of a second differential pressure before a final backwash in each chemically enhanced backwash cycle; calculating a preset value of a third differential pressure between the first differential pressure and the second differential pressure according to the preset value of the first differential pressure and the preset value of the second differential pressure; obtaining a predicted value of the third differential pressure according to a differential pressure curve plotted based on online filtration differential pressure data; and comparing the preset value of the third differential pressure and the predicted value of the third differential pressure to determine whether to dose. A dosing control system is also provided.
    Type: Application
    Filed: March 24, 2022
    Publication date: July 7, 2022
    Inventors: Mu LIU, Yingqiang SU, Zehua LI, Kai SUN, Xiaofeng LIN, Huiming HAN, Mengyuan DUAN, Liyan ZHANG
  • Publication number: 20210000454
    Abstract: Collection devices with valves for liquid specimens are disclosed. In an embodiment, the disclosure provides a collection device including a reservoir having a sealed cavity, the sealed cavity being under a negative pressure; a delivery tube in communication with the sealed cavity of the reservoir and having a delivery inlet, a delivery outlet, and a valve disposed between the delivery inlet and the delivery outlet, the valve being configured to control the communication and blocking between the delivery inlet and the delivery outlet, and an angle being formed by an extension line of the delivery inlet an extension line of the delivery outlet; and a piercing component for piercing a tissue is connected with the delivery inlet of the delivery tube.
    Type: Application
    Filed: May 30, 2018
    Publication date: January 7, 2021
    Applicant: Zhongshan Ophthalmic Center of Sun Yat-Sen University
    Inventors: Yizhi LIU, Yan LUO, Xiaofeng LIN, Lin LU
  • Patent number: 10418946
    Abstract: An envelope tracking device includes circuitry that senses a current of an input state of the envelope tracking device. The circuitry also senses an output voltage of the envelope tracking device, and turns on at least one of a first and a second output switches to generate an output current based on at least one of the sensed current and the sensed voltage.
    Type: Grant
    Filed: January 8, 2018
    Date of Patent: September 17, 2019
    Assignee: AVAGO TECHNOLOGIES INTERNATIONAL SALES PTE. LIMITED
    Inventors: Xiaofeng Lin, Leon Samuel Wang, Shengyuan Li, Junjie Lu, Xicheng Jiang
  • Patent number: 10414080
    Abstract: An injection molding apparatus for forming a gasket around an edge of a glass is provided. The injection molding apparatus includes: an injection mold die; a fixing component, disposed inside the injection mold die and adapted for fixing the glass inside the injection mold die; a detection unit, mounted to the injection molding apparatus and adapted for detecting an image or vibration of the glass; a determination unit, coupled with the detection unit and adapted for determining whether the glass breaks based on a detection result of the detection unit. The apparatus can determine whether the glass breaks, such that the risk of scratching the injection mold die by glass breaking may be reduced. Therefore, the injection molding yield can be improved, the time for repairing the injection mold die may be reduced and a service life of the injection mold die may be prolonged.
    Type: Grant
    Filed: April 15, 2015
    Date of Patent: September 17, 2019
    Assignee: SAINT-GOBAIN GLASS FRANCE
    Inventors: Shuai Zhang, Xiaofeng Lin, Ping Li, Xiaowei Sun, Xiaoyu Zhao