Patents by Inventor Xiaogang Du

Xiaogang Du 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).

  • Publication number: 20220407278
    Abstract: An automatic plugging/unplugging device for a connector, an automatic plugging method, an automatic unplugging method, and a computer-readable storage medium are disclosed. The automatic plugging/unplugging device may include a clamping unit (201) and a force detection unit (202). The clamping unit (201) is configured to hold a connector (10), and may include at least one of a vibration sensor (2017) and a sound sensor (2014). The vibration sensor (2017) is configured to detect the vibration resulting from plugging or unplugging the connector (10), and the sound sensor (2014) is configured to detect the sound generated during plugging or unplugging the connector (10). The force detection unit (202) may include a detection base (2021) and a force sensor (2023). The force sensor (2023) is configured to detect the magnitude of a plugging or unplugging force generated during plugging or unplugging the connector (10).
    Type: Application
    Filed: November 2, 2020
    Publication date: December 22, 2022
    Inventors: Kun NIU, Zuolin GAO, Hongjun ZHU, Xiaogang DU, Chao CHEN, Weiping YI
  • Patent number: 8209572
    Abstract: Various new and non-obvious apparatus and methods for testing embedded memories in an integrated circuit are disclosed. One of the disclosed embodiments is an apparatus for testing an embedded memory in an integrated circuit. This exemplary embodiment comprises input logic that includes one or more memory-input paths coupled to respective memory inputs of the embedded memory, a memory built-in self-test (MBIST) controller, and at least one scan cell coupled between the input logic and the MBIST controller. The scan cell of this embodiment is selectively operable in a memory-test mode and a system mode. In memory-test mode, the scan cell can apply memory-test data to the memory inputs along the memory-input paths of the integrated circuit. Any of the disclosed apparatus can be designed, simulated, and/or verified (and any of the disclosed methods can be performed) in a computer-executed application, such as an electronic-design-automation (“EDA”) software tool.
    Type: Grant
    Filed: November 8, 2010
    Date of Patent: June 26, 2012
    Assignee: Mentor Graphics Corporation
    Inventors: Don E. Ross, Xiaogang Du, Wu-Tung Cheng, Joseph C. Rayhawk
  • Publication number: 20110145774
    Abstract: Various new and non-obvious apparatus and methods for testing embedded memories in an integrated circuit are disclosed. One of the disclosed embodiments is an apparatus for testing an embedded memory in an integrated circuit. This exemplary embodiment comprises input logic that includes one or more memory-input paths coupled to respective memory inputs of the embedded memory, a memory built-in self-test (MBIST) controller, and at least one scan cell coupled between the input logic and the MBIST controller. The scan cell of this embodiment is selectively operable in a memory-test mode and a system mode. In memory-test mode, the scan cell can apply memory-test data to the memory inputs along the memory-input paths of the integrated circuit. Any of the disclosed apparatus can be designed, simulated, and/or verified (and any of the disclosed methods can be performed) in a computer-executed application, such as an electronic-design-automation (“EDA”) software tool.
    Type: Application
    Filed: November 8, 2010
    Publication date: June 16, 2011
    Inventors: Don E. Ross, Xiaogang Du, Wu-Tung Cheng, Joseph C. Rayhawk
  • Patent number: 7831871
    Abstract: Various new and non-obvious apparatus and methods for testing embedded memories in an integrated circuit are disclosed. One of the disclosed embodiments is an apparatus for testing an embedded memory in an integrated circuit. This exemplary embodiment comprises input logic that includes one or more memory-input paths coupled to respective memory inputs of the embedded memory, a memory built-in self-test (MBIST) controller, and at least one scan cell coupled between the input logic and the MBIST controller. The scan cell of this embodiment is selectively operable in a memory-test mode and a system mode. In memory-test mode, the scan cell can apply memory-test data to the memory inputs along the memory-input paths of the integrated circuit. Any of the disclosed apparatus can be designed, simulated, and/or verified (and any of the disclosed methods can be performed) in a computer-executed application, such as an electronic-design-automation (“EDA”) software tool.
    Type: Grant
    Filed: March 9, 2009
    Date of Patent: November 9, 2010
    Assignee: Mentor Graphics Corporation
    Inventors: Don E. Ross, Xiaogang Du, Wu-Tung Cheng, Joseph C. Rayhawk
  • Publication number: 20090172486
    Abstract: Various new and non-obvious apparatus and methods for testing embedded memories in an integrated circuit are disclosed. One of the disclosed embodiments is an apparatus for testing an embedded memory in an integrated circuit. This exemplary embodiment comprises input logic that includes one or more memory-input paths coupled to respective memory inputs of the embedded memory, a memory built-in self-test (MBIST) controller, and at least one scan cell coupled between the input logic and the MBIST controller. The scan cell of this embodiment is selectively operable in a memory-test mode and a system mode. In memory-test mode, the scan cell can apply memory-test data to the memory inputs along the memory-input paths of the integrated circuit. Any of the disclosed apparatus can be designed, simulated, and/or verified (and any of the disclosed methods can be performed) in a computer-executed application, such as an electronic-design-automation (“EDA”) software tool.
    Type: Application
    Filed: March 9, 2009
    Publication date: July 2, 2009
    Inventors: Don E. Ross, Xiaogang Du, Wu-Tung Cheng, Joseph C. Rayhawk
  • Patent number: 7502976
    Abstract: Various new and non-obvious apparatus and methods for testing embedded memories in an integrated circuit are disclosed. One of the disclosed embodiments is an apparatus for testing an embedded memory in an integrated circuit. This exemplary embodiment comprises input logic that includes one or more memory-input paths coupled to respective memory inputs of the embedded memory, a memory built-in self-test (MBIST) controller, and at least one scan cell coupled between the input logic and the MBIST controller. The scan cell of this embodiment is selectively operable in a memory-test mode and a system mode. In memory-test mode, the scan cell can apply memory-test data to the memory inputs along the memory-input paths of the integrated circuit. Any of the disclosed apparatus can be designed, simulated, and/or verified (and any of the disclosed methods can be performed) in a computer-executed application, such as an electronic-design-automation (“EDA”) software tool.
    Type: Grant
    Filed: February 13, 2004
    Date of Patent: March 10, 2009
    Inventors: Don E. Ross, Xiaogang Du, Wu-Tung Cheng, Joseph C. Rayhawk
  • Patent number: 7434131
    Abstract: Programmable memory built-in self-test (MBIST) methods, apparatus, and systems are disclosed. Exemplary embodiments of the disclosed technology can be used, for example, to test one or more memories located on an integrated circuit during manufacturing testing.
    Type: Grant
    Filed: November 18, 2005
    Date of Patent: October 7, 2008
    Inventors: Nilanjan Mukherjee, Xiaogang Du, Wu-Tung Cheng
  • Patent number: 7428680
    Abstract: Programmable memory built-in self-test (MBIST) methods, apparatus, and systems are disclosed. Exemplary embodiments of the disclosed technology can be used, for example, to test one or more memories located on an integrated circuit during manufacturing testing.
    Type: Grant
    Filed: November 18, 2005
    Date of Patent: September 23, 2008
    Inventors: Nilanjan Mukherjee, Xiaogang Du, Wu-Tung Cheng
  • Patent number: 7426668
    Abstract: Programmable memory built-in self-test (MBIST) methods, apparatus, and systems are disclosed. Exemplary embodiments of the disclosed technology can be used, for example, to test one or more memories located on an integrated circuit during manufacturing testing.
    Type: Grant
    Filed: November 18, 2005
    Date of Patent: September 16, 2008
    Inventors: Nilanjan Mukherjee, Xiaogang Du, Wu-Tung Cheng
  • Patent number: 7200786
    Abstract: Methods and apparatus for analyzing memory defects in an embedded memory are described. According to certain embodiments, the analysis can be performed “at-speed” and can be used to analyze multi-bit failures in words of a word-oriented memory. According to some embodiments, the analysis comprises updating a record of column defects not repaired by spare rows as the memory is being tested. The record can be evaluated after a test to determine whether a repair strategy can successfully repair a memory-under-test.
    Type: Grant
    Filed: December 30, 2003
    Date of Patent: April 3, 2007
    Inventors: Wu-Tung Cheng, Joseph Rayhawk, Xiaogang Du
  • Publication number: 20060156133
    Abstract: Programmable memory built-in self-test (MBIST) methods, apparatus, and systems are disclosed. Exemplary embodiments of the disclosed technology can be used, for example, to test one or more memories located on an integrated circuit during manufacturing testing.
    Type: Application
    Filed: November 18, 2005
    Publication date: July 13, 2006
    Inventors: Nilanjan Mukherjee, Xiaogang Du, Wu-Tung Cheng
  • Publication number: 20060156134
    Abstract: Programmable memory built-in self-test (MBIST) methods, apparatus, and systems are disclosed. Exemplary embodiments of the disclosed technology can be used, for example, to test one or more memories located on an integrated circuit during manufacturing testing.
    Type: Application
    Filed: November 18, 2005
    Publication date: July 13, 2006
    Inventors: Nilanjan Mukherjee, Xiaogang Du, Wu-Tung Cheng
  • Publication number: 20060146622
    Abstract: Programmable memory built-in self-test (MBIST) methods, apparatus, and systems are disclosed. Exemplary embodiments of the disclosed technology can be used, for example, to test one or more memories located on an integrated circuit during manufacturing testing.
    Type: Application
    Filed: November 18, 2005
    Publication date: July 6, 2006
    Inventors: Nilanjan Mukherjee, Xiaogang Du, Wu-Tung Cheng
  • Publication number: 20040210803
    Abstract: Methods and apparatus for analyzing memory defects in an embedded memory are described. According to certain embodiments, the analysis can be performed “at-speed” and can be used to analyze multi-bit failures in words of a word-oriented memory. According to some embodiments, the analysis comprises updating a record of column defects not repaired by spare rows as the memory is being tested. The record can be evaluated after a test to determine whether a repair strategy can successfully repair a memory-under-test.
    Type: Application
    Filed: December 30, 2003
    Publication date: October 21, 2004
    Applicant: Mentor Graphics Corporation
    Inventors: Wu-Tung Cheng, Joseph Rayhawk, Xiaogang Du
  • Publication number: 20040190331
    Abstract: Various new and non-obvious apparatus and methods for testing embedded memories in an integrated circuit are disclosed. One of the disclosed embodiments is an apparatus for testing an embedded memory in an integrated circuit. This exemplary embodiment comprises input logic that includes one or more memory-input paths coupled to respective memory inputs of the embedded memory, a memory built-in self-test (MBIST) controller, and at least one scan cell coupled between the input logic and the MBIST controller. The scan cell of this embodiment is selectively operable in a memory-test mode and a system mode. In memory-test mode, the scan cell can apply memory-test data to the memory inputs along the memory-input paths of the integrated circuit. Any of the disclosed apparatus can be designed, simulated, and/or verified (and any of the disclosed methods can be performed) in a computer-executed application, such as an electronic-design-automation (“EDA”) software tool.
    Type: Application
    Filed: February 13, 2004
    Publication date: September 30, 2004
    Inventors: Don E. Ross, Xiaogang Du, Wu-Tung Cheng, Joseph C. Rayhawk