Patents by Inventor Rui-Xia Fei

Rui-Xia Fei 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).

  • Electronic power protection circuit and applications thereof
    Patent number: 8022640
    Abstract: An electric power protection circuit connected in series to a secondary side circuit of a transformer in a switch mode power supply includes a voltage/current limiting device to get an electric power signal output from the secondary side circuit of the transformer that goes through current and voltage limitation before being output and a constant current/voltage controller to get the electric power signal which has the current and voltage limited by the voltage/current limiting device. The electric power signal further is undergone constant voltage/current control to achieve voltage overshoot protection.
    Type: Grant
    Filed: September 16, 2009
    Date of Patent: September 20, 2011
    Assignee: BCD Semiconductor Manufacturing Limited
    Inventors: Chao Chen, Rui-Xia Fei
  • Power adapter with voltage-stabilized compensation
    Patent number: 7864550
    Abstract: A power adapter with voltage-stabilized compensation includes a pulse frequency modulation circuit to generate a driving pulse which has a variable OFF time interval to control power transformed and output by a transformer. The power adapter also has an ancillary coil to induce a feedback signal on the secondary coil of the transformer. The pulse frequency modulation circuit includes a time interval modulation unit to receive the feedback signal and a feedback compensation unit. The time interval modulation unit sets a level voltage compared with the feedback signal to generate a sample signal to modulate the OFF time interval. The feedback compensation unit provides a compensation signal to the time interval modulation unit to change the size of the feedback signal or sample signal thereby to compensate the voltage output from the secondary side.
    Type: Grant
    Filed: November 5, 2008
    Date of Patent: January 4, 2011
    Assignee: BCD Semiconductor Manufacturing Limited
    Inventors: Jian-Hua Duan, Rui-Xia Fei, Shao-Hua Fang, Qing-Hua Su
  • POWER ADAPTER WITH VOLTAGE-STABILIZED COMPENSATION
    Publication number: 20100110735
    Abstract: A power adapter with voltage-stabilized compensation includes a pulse frequency modulation circuit to generate a driving pulse which has a variable OFF time interval to control power transformed and output by a transformer. The power adapter also has an ancillary coil to induce a feedback signal on the secondary coil of the transformer. The pulse frequency modulation circuit includes a time interval modulation unit to receive the feedback signal and a feedback compensation unit. The time interval modulation unit sets a level voltage compared with the feedback signal to generate a sample signal to modulate the OFF time interval. The feedback compensation unit provides a compensation signal to the time interval modulation unit to change the size of the feedback signal or sample signal thereby to compensate the voltage output from the secondary side.
    Type: Application
    Filed: November 5, 2008
    Publication date: May 6, 2010
    Inventors: Jian-Hua Duan, Rui-Xia Fei, Shao-Hua Fang, Qing-Hua Su
  • Electronic Power Protection Circuit And Applications Thereof
    Publication number: 20100091524
    Abstract: An electric power protection circuit connected in series to a secondary side circuit of a transformer in a switch mode power supply includes a voltage/current limiting device to get an electric power signal output from the secondary side circuit of the transformer that goes through current and voltage limitation before being output and a constant current/voltage controller to get the electric power signal which has the current and voltage limited by the voltage/current limiting device. The electric power signal further is undergone constant voltage/current control to achieve voltage overshoot protection.
    Type: Application
    Filed: September 16, 2009
    Publication date: April 15, 2010
    Applicant: BCD Semiconductor Manufacturing Limited
    Inventors: Chao Chen, Rui-Xia Fei
  • Electronic power protection circuit and applications thereof
    Patent number: 7598680
    Abstract: An electric power protection circuit connected in series to a secondary side circuit of a transformer in a switch mode power supply includes a voltage/current limiting device to get an electric power signal output from the secondary side circuit of the transformer that goes through current and voltage limitation before being output and a constant current/voltage controller to get the electric power signal which has the current and voltage limited by the voltage/current limiting device. The electric power signal further is undergone constant voltage/current control to achieve voltage overshoot protection.
    Type: Grant
    Filed: January 12, 2007
    Date of Patent: October 6, 2009
    Assignee: BCD Semiconductor Manufacturing Limited
    Inventors: Chao Chen, Rui-Xia Fei
  • Electronic power protection circuit and applications thereof
    Publication number: 20080055798
    Abstract: An electric power protection circuit connected in series to a secondary side circuit of a transformer in a switch mode power supply includes a voltage/current limiting device to get an electric power signal output from the secondary side circuit of the transformer that goes through current and voltage limitation before being output and a constant current/voltage controller to get the electric power signal which has the current and voltage limited by the voltage/current limiting device. The electric power signal further is undergone constant voltage/current control to achieve voltage overshoot protection.
    Type: Application
    Filed: January 12, 2007
    Publication date: March 6, 2008
    Inventors: Chao Chen, Rui-Xia Fei