Patents by Inventor Chaoqun Liu

Chaoqun Liu 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: 11640834
    Abstract: A droop reduction circuit on a die includes a voltage detector circuit to detect voltage droop in a supply voltage received by a first load. The droop reduction circuit further includes a driver controller circuit to drive power switch (PSH) banks in response to detection of the voltage droop. Each of the PSH banks includes at least one power switch having an input terminal, a gate terminal, and an output terminal. The input terminal is to receive a secondary voltage, which is higher than the supply voltage and is also received by a second load on the die. The gate terminal is to receive a drive signal from the driver controller, and the output terminal is to pull up the voltage droop in the supply voltage.
    Type: Grant
    Filed: October 24, 2020
    Date of Patent: May 2, 2023
    Assignee: MediaTek Singapore Pte. Ltd.
    Inventors: Senthilkumar Jayapal, Yang Bai, Chaoqun Liu, Yipin Wu, Chih-Hung Tai
  • Publication number: 20220130432
    Abstract: A droop reduction circuit on a die includes a voltage detector circuit to detect voltage droop in a supply voltage received by a first load. The droop reduction circuit further includes a driver controller circuit to drive power switch (PSH) banks in response to detection of the voltage droop. Each of the PSH banks includes at least one power switch having an input terminal, a gate terminal, and an output terminal. The input terminal is to receive a secondary voltage, which is higher than the supply voltage and is also received by a second load on the die. The gate terminal is to receive a drive signal from the driver controller, and the output terminal is to pull up the voltage droop in the supply voltage.
    Type: Application
    Filed: October 24, 2020
    Publication date: April 28, 2022
    Inventors: Senthilkumar Jayapal, Yang Bai, Chaoqun Liu, Yipin Wu, Chih-Hung Tai
  • Patent number: 11316443
    Abstract: The present disclosure relates to an active neutral-point clamped (ANPC) three-level converter, and a method and controller for controlling thereof. The ANPC three-level converter includes at least one bridge leg, and a controller. Each of the at least one bridge leg includes multiple input terminals, an output terminal, and multiple switches connected between the multiple input terminals and the output terminal. The multiple input terminals include a first input terminal, a second input terminal, and a third input terminal. The multiple switches include a first external switch, a first internal switch, a first clamp switch, a second external switch, a second internal switch, and a second clamp switch. The method for controlling the NPC three-level converter includes a method for controlling the ANPC three-level converter to stop operating, and a method for controlling the ANPC three-level converter to start to operate.
    Type: Grant
    Filed: October 19, 2020
    Date of Patent: April 26, 2022
    Assignee: Shenzhen Kstar Science and Technology Co., Ltd.
    Inventors: Chengrui Du, Chaoqun Liu, Shenjian Zou, Zhiqiang Zhang, Baisheng Chen
  • Publication number: 20210367530
    Abstract: The present disclosure relates to an active neutral-point clamped (ANPC) three-level converter, and a method and controller for controlling thereof. The ANPC three-level converter includes at least one bridge leg, and a controller. Each of the at least one bridge leg includes multiple input terminals, an output terminal, and multiple switches connected between the multiple input terminals and the output terminal. The multiple input terminals include a first input terminal, a second input terminal, and a third input terminal. The multiple switches include a first external switch, a first internal switch, a first clamp switch, a second external switch, a second internal switch, and a second clamp switch. The method for controlling the NPC three-level converter includes a method for controlling the ANPC three-level converter to stop operating, and a method for controlling the ANPC three-level converter to start to operate.
    Type: Application
    Filed: October 19, 2020
    Publication date: November 25, 2021
    Inventors: Chengrui DU, Chaoqun LIU, Shenjian ZOU, Zhiqiang ZHANG, Baisheng CHEN
  • Publication number: 20210205643
    Abstract: Provided are a fire extinguishing method and a fire extinguishing system for a lithium ion battery, an electronic device and a storage medium. The method includes: real-timely collecting environmental parameter values in a battery box where a lithium ion batteries are placed; determining a safety level of the lithium ion battery according to the environmental parameter values and a preset threshold of each environmental parameter, and sending a fire extinguishing command to a fire extinguishing device according to a preset fire extinguishing control program, where the fire extinguishing control program is a fire extinguishing strategy corresponding to the safety level of the lithium ion battery; and enabling the fire extinguishing device to execute a fire extinguishing operation according to the fire extinguishing command.
    Type: Application
    Filed: July 16, 2019
    Publication date: July 8, 2021
    Applicants: CHINA ELECTRIC POWER RESEARCH INSTITUTE COMPANY LIMITED, STATE GRID CORPORATION OF CHINA
    Inventors: Kai Yang, Fei Gao, Kangkang Wang, Chaoqun Liu, Mingjie Zhang, Hao Liu, Guangqing Jia, Mengmeng Geng, Kaifeng Wang
  • Patent number: 11004480
    Abstract: A device for reducing leakage current includes a memory cell array, a power switch and a core logic. The memory cell array is electrically connected to a first power rail which supplies a first voltage level. The core logic circuitry is electrically connected to a second power rail via the power switch when the power switch is turned on. The second power rail supplies a second voltage level which is lower than the first voltage level. The power switch is to be turned off by the first voltage level supplied to a gate terminal of the power switch, to thereby disconnect the core logic circuitry in a sleep state from the second power rail.
    Type: Grant
    Filed: January 21, 2019
    Date of Patent: May 11, 2021
    Assignee: MediaTek Inc.
    Inventors: Senthilkumar Jayapal, Chaoqun Liu, Yipin Wu, Soh Chee Keong
  • Patent number: 10810248
    Abstract: A processor can produce a database catalog for a second version of a database management system of the database. The database catalog can store metadata related to definitions of objects or tables included in the second version of the database. A controller can be caused to be established in memory cells being used for the first version of the database. A copy of the database catalog for the second version of the database management system can be stored in the memory cells being used for the first version of the database. The controller, using the copy of the database catalog, can produce the second version of the database management system. The second version of the database management system can be caused to interact with data stored in a storage of the database. The storage can be included in the memory cells being used for the first version of the database.
    Type: Grant
    Filed: September 24, 2018
    Date of Patent: October 20, 2020
    Assignee: salesforce.com, inc.
    Inventors: Xiaoyi Tang, Chaoqun Liu, Prashasthi Prabhakar, Serge Rielau, Jeff Cohen, John Galloway, Mohan Singamshetty
  • Publication number: 20200234737
    Abstract: A device for reducing leakage current includes a memory cell array, a power switch and a core logic. The memory cell array is electrically connected to a first power rail which supplies a first voltage level. The core logic circuitry is electrically connected to a second power rail via the power switch when the power switch is turned on. The second power rail supplies a second voltage level which is lower than the first voltage level. The power switch is to be turned off by the first voltage level supplied to a gate terminal of the power switch, to thereby disconnect the core logic circuitry in a sleep state from the second power rail.
    Type: Application
    Filed: January 21, 2019
    Publication date: July 23, 2020
    Inventors: Senthilkumar Jayapal, Chaoqun Liu, Yipin Wu, Soh Chee Keong
  • Publication number: 20200097498
    Abstract: A processor can produce a database catalog for a second version of a database management system of the database. The database catalog can store metadata related to definitions of objects or tables included in the second version of the database. A controller can be caused to be established in memory cells being used for the first version of the database. A copy of the database catalog for the second version of the database management system can be stored in the memory cells being used for the first version of the database. The controller, using the copy of the database catalog, can produce the second version of the database management system. The second version of the database management system can be caused to interact with data stored in a storage of the database. The storage can be included in the memory cells being used for the first version of the database.
    Type: Application
    Filed: September 24, 2018
    Publication date: March 26, 2020
    Inventors: Xiaoyi Tang, Chaoqun Liu, Prashasthi Prabhakar, Serge Rielau, Jeff Cohen, John Galloway, Mohan Singamshetty