Patents by Inventor YuJian Qian

YuJian Qian 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).

  • Switching circuit for master-slave feeding mode of low voltage power supply
    Patent number: 7332833
    Abstract: The present invention provides a switching circuit for the master-slave feeding mode of the low voltage power supply. The switching circuit utilizes the active switches as the switching devices, so that it can increase the switching speed, decrease the voltage drop and loss, being suitable to the low voltage circuits, and can judge or determine the master power supply and the back-up power supply, realizing the switching between the master and slave power supplies without interruption. The switching circuit of the invention improves the reliability of the system and has the simple structure and easy operation.
    Type: Grant
    Filed: December 3, 2004
    Date of Patent: February 19, 2008
    Assignee: Alcatel
    Inventors: JunKui Pan, HongBing Cheng, YuJian Qian, Lan Zhang
  • Switching circuit for master-slave feeding mode of low voltage power supply
    Publication number: 20050127882
    Abstract: The present invention provides a switching circuit for the master-slave feeding mode of the low voltage power supply. The switching circuit utilizes the active switches as the switching devices, so that it can increase the switching speed, decrease the voltage drop and loss, being suitable to the low voltage circuits, and can judge or determine the master power supply and the back-up power supply, realizing the switching between the master and slave power supplies without interruption. The switching circuit of the invention improves the reliability of the system and has the simple structure and easy operation.
    Type: Application
    Filed: December 3, 2004
    Publication date: June 16, 2005
    Inventors: JunKui Pan, HongBing Cheng, YuJian Qian, Lan Zhang