Patents by Inventor Tiancong Shao

Tiancong Shao 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).

  • Power MOSFET active gate drive based on negative feedback mechanism
    Patent number: 11336277
    Abstract: This invention introduces the negative feedback into the gate drive. It proposes a negative feedback active gate drive (NFAGD) for silicon carbide (SiC) and gallium nitride (GaN) semiconductor devices to fully utilize their potential of high switching-speed capability in a phase-leg configuration. An auxiliary P-channel MOSFET is introduced to construct a negative feedback control mechanism. Due to the negative feedback mechanism, the proposed drive can automatically attenuate the disturbance from the complementary device of the phase-leg. The negative feedback active gate drive (NFAGD) has a simple structure and easy to be realized using a push-pull drive circuit, a drive resistor, an auxiliary MOSFET and an auxiliary capacitor, without involving any additional logical circuits.
    Type: Grant
    Filed: April 29, 2021
    Date of Patent: May 17, 2022
    Assignees: BEIJING JIAOTONG UNIVERSITY, GLOBAL POWER TECHNOLOGY CO., LTD.
    Inventors: Tiancong Shao, Zhijun Li, Trillion Q. Zheng, Bo Huang, Junxing Wang
  • Power MOSFET Active Gate Drive Based on Negative Feedback Mechanism
    Publication number: 20220123741
    Abstract: This invention introduces the negative feedback into the gate drive. It proposes a negative feedback active gate drive (NFAGD) for silicon carbide (SiC) and gallium nitride (GaN) semiconductor devices to fully utilize their potential of high switching-speed capability in a phase-leg configuration. An auxiliary P-channel MOSFET is introduced to construct a negative feedback control mechanism. Due to the negative feedback mechanism, the proposed drive can automatically attenuate the disturbance from the complementary device of the phase-leg. The negative feedback active gate drive (NFAGD) has a simple structure and easy to be realized using a push-pull drive circuit, a drive resistor, an auxiliary MOSFET and an auxiliary capacitor, without involving any additional logical circuits.
    Type: Application
    Filed: April 29, 2021
    Publication date: April 21, 2022
    Inventors: Tiancong Shao, Zhijun Li, Trillion Q. Zheng, Bo Huang, Junxing Wang