Patents by Inventor Xue-Qin Xia

Xue-Qin Xia 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 SUPPLY CIRCUIT WITH SURGE-SUPPRESSION
    Publication number: 20190280587
    Abstract: A power supply circuit which can suppress current surges comprises a first switch unit, a first control unit, a second switch unit, and a second control unit. The first switch unit is coupled between a voltage input terminal and a load, the load comprising a capacitor. The second switch unit is coupled between the voltage input terminal and the load. The second control unit turns on the second switch unit to charge the capacitor to a predetermined voltage before the first control unit controls the first switch unit to turn on. The second control unit controls the second switch unit to turn off when a voltage of the capacitor is greater than the predetermined voltage, and the first control unit controls the first switch unit to then turn on to supply power to the load.
    Type: Application
    Filed: May 30, 2018
    Publication date: September 12, 2019
    Inventors: YING LI, XUE-QIN XIA
  • Power supply circuit with surge-supression
    Patent number: 10389228
    Abstract: A power supply circuit which can suppress current surges comprises a first switch unit, a first control unit, a second switch unit, and a second control unit. The first switch unit is coupled between a voltage input terminal and a load, the load comprising a capacitor. The second switch unit is coupled between the voltage input terminal and the load. The second control unit turns on the second switch unit to charge the capacitor to a predetermined voltage before the first control unit controls the first switch unit to turn on. The second control unit controls the second switch unit to turn off when a voltage of the capacitor is greater than the predetermined voltage, and the first control unit controls the first switch unit to then turn on to supply power to the load.
    Type: Grant
    Filed: May 30, 2018
    Date of Patent: August 20, 2019
    Assignee: HONGFUJIN PRECISION ELECTRONICS (TIANJIN) CO., LTD.
    Inventors: Ying Li, Xue-Qin Xia