Patents by Inventor Zhan Chen

Zhan Chen 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: 12355342
    Abstract: A method of controlling a switch-mode converter can include: obtaining an overcurrent reference threshold according to an output voltage sampling signal indicative of an output voltage of the switch-mode converter; and generating an over current protection triggering signal in response to an output current sampling signal indicative of an output current of the switch-mode converter and the overcurrent reference threshold meet a predetermined criterion, thereby triggering the switch-mode converter to enter a protection state.
    Type: Grant
    Filed: October 14, 2022
    Date of Patent: July 8, 2025
    Assignee: Silergy Semiconductor Technology (Hangzhou) LTD
    Inventors: Zhan Chen, Qiukai Huang, Jin Jin, Guiying Zhang
  • Patent number: 12294306
    Abstract: A controller of a switching power supply can include: a frequency-jittering control circuit configured to generate a frequency-jittering signal adaptively; a comparator having two input terminals for respectively receiving an inductor current sampling signal and a feedback control signal, and being configured to compare the signals of the two input terminals to generate a switching control signal, in order to control a power transistor in the switching power supply; and a superimposing circuit configured to superimpose the frequency-jittering signal on one of the two input terminals of the comparator, where a switching frequency of the switching power supply varies within a preset range under different load conditions.
    Type: Grant
    Filed: January 27, 2022
    Date of Patent: May 6, 2025
    Assignee: Silergy Semiconductor Technology (Hangzhou) LTD
    Inventors: Zhan Chen, Jian Deng, Xiaoru Xu
  • Publication number: 20250086062
    Abstract: A first tuning process to be performed on an erase block of the solid-state storage device is provided by a storage system controller that is external to the solid-state storage device. Results of the first tuning process on the erase block are stored as metadata in the solid-state storage device. A second tuning process to be performed on the erase block is selected based on accessing the results of the tuning process in the metadata.
    Type: Application
    Filed: November 25, 2024
    Publication date: March 13, 2025
    Inventors: HARI KANNAN, GORDON JAMES COLEMAN, DOUGLAS LOTHER, ZHAN CHEN
  • Publication number: 20250085890
    Abstract: A method is provided. The method includes monitoring an incoming workload for a storage system and adjusting an amount of differing solid state memory types within a buffer of the storage system based on the monitoring.
    Type: Application
    Filed: November 27, 2024
    Publication date: March 13, 2025
    Inventors: SVITLANA TUMANOVA, YING GAO, ZHAN CHEN
  • Publication number: 20250034430
    Abstract: The present disclosure provides a method for preparing an organic-inorganic nanocomposite particle dispersion, comprising: preparing a negatively charged organic-inorganic nanocomposite particle dispersion: adding positively charged inorganic nanoparticles to an anionic organic polymer solution, stirring thoroughly, dispersing uniformly, and obtaining a negatively charged organic-inorganic nanocomposite particle dispersion; preparing a positively charged organic-inorganic nanocomposite particle dispersion: adding a negatively charged organic polymer inorganic metal oxide composite dispersion to a cationic organic polymer solution, stirring thoroughly, and dispersing uniformly to obtain a positively charged organic polymer inorganic nanocomposite particle dispersion; repeating step (1) and (2) alternately to obtain a dispersion of negatively charged and positively charged organic-inorganic nanocomposites by adjusting the number of step (1) and (2), respectively.
    Type: Application
    Filed: November 30, 2022
    Publication date: January 30, 2025
    Inventors: Xingping WANG, Pengyu Xu, Changzheng JIA, Fengru LIU, Shoutian LI, Zhan CHEN
  • Patent number: 12158814
    Abstract: A system and related method operate solid-states storage memory. The system performs a first tuning process that has a first set of tuning options, on a first portion of solid-states storage memory. The system identifies one or more second portions of solid-states storage memory, within the first portion of solid-states storage memory that fail readability after the first tuning process. The system performs a second tuning process that has a differing second set of tuning options, on each of the one or more second portions of solid-states storage memory.
    Type: Grant
    Filed: April 16, 2021
    Date of Patent: December 3, 2024
    Assignee: PURE STORAGE, INC.
    Inventors: Hari Kannan, Gordon James Coleman, Douglas Lother, Zhan Chen
  • Patent number: 12068683
    Abstract: A controller of a switching power supply can include: a frequency-jittering control circuit configured to generate a first frequency-jittering signal and a second frequency-jittering signal; where a jittering range of an operating frequency of a power transistor in the switching power supply is adjusted by the first frequency-jittering signal; and where a jittering amplitude of a peak value of an inductor current of the switching power supply is adjusted by the second frequency-jittering signal.
    Type: Grant
    Filed: January 27, 2022
    Date of Patent: August 20, 2024
    Assignee: Silergy Semiconductor Technology (Hangzhou) LTD
    Inventors: Zhan Chen, Jian Deng, Xiaoru Xu
  • Patent number: 12057781
    Abstract: A sampling circuit for a switching power supply, can include: a first sampling circuit configured to acquire a first sampling signal of a current flowing through an inductor in the switching power supply; and a second sampling circuit configured to obtain a compensation signal with a same rising slope as the first sampling signal within a turn-off delay time of a power switch in the switching power supply, and to superimpose the compensation signal on the first sampling signal to generate a second sampling signal.
    Type: Grant
    Filed: November 22, 2022
    Date of Patent: August 6, 2024
    Assignee: Silergy Semiconductor Technology (Hangzhou) LTD
    Inventors: Zhan Chen, Jin Jin, Guiying Zhang, Hongxing Wang
  • Patent number: 12013826
    Abstract: Methods and systems for database query efficiency improvement are disclosed. In one embodiment, a method includes mirroring a primary database to a secondary database; creating a testing database comprising the schema; receiving a query; running the query on the testing database; and evaluating the query by: identifying predicates in the query; determining most common values for each column name by querying the secondary database; creating, for each column name, a list comprising at least one of the most common values; creating a test predicate comprising one of the column names and an entry for the list corresponding to the column name; creating a test query comprising one or more test predicates; determining a resource utilization of the query by running each of the test queries on the secondary database; and providing, to a user interface for display, an efficiency improvement recommendation when the resource utilization exceeds a threshold.
    Type: Grant
    Filed: February 22, 2021
    Date of Patent: June 18, 2024
    Assignee: Coupang Corp.
    Inventors: Bin Dong, Zhan Chen, Zhiyong Huang, Chuanchuan Han, Junzhao Zhang
  • Publication number: 20240182217
    Abstract: A flexible cable tie, an electrical connection structure and a battery are described. The flexible cable tie includes a cable tie body, a first snapping portion and a second snapping portion, the first snapping portion and the second snapping portion. The cable tie body has an unfolded state and a wrapping state. In the unfolded state, the first snapping portion and the second snapping portion are arranged on the same side of the cable tie body; and in the wrapping state, a second end of the cable tie body is connected to the first snapping portion and the second snapping portion. The two snapping portions, can realize dual fixing of the second end of the cable tie body. The two snapping portions are spaced by the preset distance, such that components wrapped by the flexible cable tie can be placed on two sides of the second snapping portion respectively.
    Type: Application
    Filed: January 8, 2024
    Publication date: June 6, 2024
    Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
    Inventors: Jiangang SU, Tiexiong HUANG, Zhongbin YANG, Kangning TAN, Kuiyuan GONG, Zhan CHEN, Shuo PEI
  • Patent number: 11909301
    Abstract: The present disclose relates to an intermittent power saving mode control circuit and method thereof, comprising: a mode indication signal generating circuit configured to generate a mode indication signal according to an output voltage compensation signal, a first reference voltage, and a second reference voltage, the mode indication signal is configured to indicate that a switching power supply is working in a work mode or a sleep mode; wherein the second reference voltage is adjusted according to a frequency of the mode indication signal, so that the frequency of the mode indication signal is maintained within a predetermined range.
    Type: Grant
    Filed: September 14, 2021
    Date of Patent: February 20, 2024
    Assignee: SILERGY SEMICONDUCTOR TECHNOLOGY (HANGZHOU) CO., LTD.
    Inventors: Zhan Chen, Qiukai Huang
  • Patent number: 11838015
    Abstract: A driving circuit and a driving method are provided. According to embodiments of the present disclosure, a power switch is driven by constant voltage or constant current during different time periods. The power switch is driven by using a first driving current during a Miller platform period, and the power switch is driven by using a second driving current when the Miller platform period ends, where the first driving current is less than the second driving current, so as to optimize EMI, reduce loss and improve efficiency.
    Type: Grant
    Filed: June 2, 2022
    Date of Patent: December 5, 2023
    Assignee: SILERGY SEMICONDUCTOR TECHNOLOGY (HANGZHOU) LTD
    Inventors: Zhan Chen, Jian Deng, Qiukai Huang
  • Patent number: 11764698
    Abstract: A buffer circuit coupled in parallel to a rectifier circuit in a secondary side of a flyback converter, the buffer circuit including: a capacitive element configured to be charged by an output capacitor when a primary power switch in the flyback converter is turned on; and the capacitive element being configured to be discharged through a secondary winding of a transformer when the primary power switch is turned off, in order to reduce energy stored in a primary leakage inductor in a primary side of the flyback converter, whereby a spike voltage generated in a secondary leakage inductor in the secondary side is reduced, and efficiency of the flyback converter is improved.
    Type: Grant
    Filed: May 27, 2021
    Date of Patent: September 19, 2023
    Assignee: Silergy Semiconductor Technology (Hangzhou) LTD
    Inventors: Qiukai Huang, Zhan Chen
  • Patent number: 11709830
    Abstract: Systems and methods for managing a highly available distributed hybrid database comprising: a memory storing instructions; and one or more processors configured to execute the instructions to: receive a query from a user device to retrieve data from a distributed database comprising a source node, a first plurality of replica nodes, and a second plurality of replica nodes, wherein the source node and the first plurality of replica nodes form a transactional cluster, and wherein the second plurality of replica nodes forms an analytical cluster; determine whether to process the query using the transactional cluster or the analytical cluster based on one or more rules; translate the query into a first protocol that the determined cluster comprehends; select a replica node corresponding to the determined cluster; process the query using the selected replica node; and send data associated with results from processing the query to the user device.
    Type: Grant
    Filed: April 26, 2021
    Date of Patent: July 25, 2023
    Assignee: Coupang Corp.
    Inventors: Zhan Chen, Bin Dong, Zhiyong Huang, Chuanchuan Han, Junzhao Zhang
  • Publication number: 20230170813
    Abstract: A sampling circuit for a switching power supply, can include: a first sampling circuit configured to acquire a first sampling signal of a current flowing through an inductor in the switching power supply; and a second sampling circuit configured to obtain a compensation signal with a same rising slope as the first sampling signal within a turn-off delay time of a power switch in the switching power supply, and to superimpose the compensation signal on the first sampling signal to generate a second sampling signal.
    Type: Application
    Filed: November 22, 2022
    Publication date: June 1, 2023
    Inventors: Zhan Chen, Jin Jin, Guiying Zhang, Hongxing Wang
  • Patent number: 11664738
    Abstract: A control chip applied in a switching power supply, where the switching power supply includes a rectifier circuit for receiving an AC input voltage and generating a rectified voltage, the control chip including: a high-voltage pin; a detection circuit coupled to the high-voltage pin to determine whether the high-voltage pin is coupled to the AC input voltage or the rectified voltage according to a sampling voltage representing a voltage received by the high-voltage pin; and a discharge circuit, where when the high-voltage pin is determined to be coupled to the AC input voltage, the control chip can enable the discharge circuit to discharge a safety capacitor coupled to an input port of the switching power supply after the switching power supply is powered off, and when the high-voltage pin is determined to be coupled to the rectified voltage, the control chip can disable the discharge circuit.
    Type: Grant
    Filed: August 16, 2021
    Date of Patent: May 30, 2023
    Assignee: Silergy Semiconductor Technology (Hangzhou) LTD
    Inventors: Zhan Chen, Jian Deng, Qiukai Huang
  • Patent number: 11645263
    Abstract: Systems and methods for managing a highly available distributed database comprising: a memory storing instructions; and one or more processors configured to execute the instructions to: determine that a source node, in a distributed database comprising the source node and one or more replica nodes, is not available; select a most-updated replica node from the one or more replica nodes; switch a role of the most-updated replica node to source; update a data store to label the source node as unavailable and the selected replica node as being a promoted source node; send a notification to a user device to update a database topology based on the updated data store; determine whether the user device has updated the database topology; and upon determining the user device has not updated the database topology, continue to send the notification to the user device until the user device has updated the database topology.
    Type: Grant
    Filed: November 10, 2021
    Date of Patent: May 9, 2023
    Assignee: Coupang Corp.
    Inventors: Zhan Chen, Zhiyong Huang, Bin Dong, Chuanchuan Han, Junzhao Zhang
  • Publication number: 20230128530
    Abstract: Systems and methods for detecting the presence of a burner flame using flame rectification are shown and described. A conductive flame sensor is positioned to conduct electricity to a burner flame when the burner is lit. The flame provides a conductive path to the burner conductive body and when operatively connected to an alternating current source, half-wave rectifies the current flowing to the sensor. A flame sensing circuit provides an output signal that is conditioned for use as an input to a flame indicator and/or a controller that is configured to shut off gas flow to the burner when no flame is present after an attempt at igniting the burner.
    Type: Application
    Filed: October 5, 2022
    Publication date: April 27, 2023
    Inventors: Jack A. Shindle, Brian C. Dougherty, James Kelley, Zhan Chen
  • Publication number: 20230119541
    Abstract: A method of controlling a switch-mode converter can include: obtaining an overcurrent reference threshold according to an output voltage sampling signal indicative of an output voltage of the switch-mode converter; and generating an over current protection triggering signal in response to an output current sampling signal indicative of an output current of the switch-mode converter and the overcurrent reference threshold meet a predetermined criterion, thereby triggering the switch-mode converter to enter a protection state.
    Type: Application
    Filed: October 14, 2022
    Publication date: April 20, 2023
    Inventors: Zhan Chen, Qiukai Huang, Jin Jin, Guiying Zhang
  • Patent number: 11624720
    Abstract: Disclosed is a salinity detection device. The salinity detection device has a collection plate, a mounting frame, and a sensor portion including a predominantly non-metallic sensor. The device may be mounted in a wheel well of a vehicle via the mounting frame and the collection plate may be attached to the mounting frame and positioned behind a wheel such that water on a road surface may be splashed thereon. The collection plate is fluidically connected to the sensor portion so that water may flow through the sensor portion proximate the sensor to measure a current flowing through the water and determine a salinity thereof.
    Type: Grant
    Filed: December 13, 2019
    Date of Patent: April 11, 2023
    Assignee: Pillar Inc.
    Inventors: Mark Boenke, Robert Davignon, Zhan Chen, Brian Dougherty, Charles E. Brooks