Patents by Inventor Yingpeng Hu

Yingpeng Hu 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).

  • Voltage sensing circuits and methods for inverters
    Patent number: 8129982
    Abstract: A voltage sensing circuit includes a voltage divider and a voltage rectifier. The voltage divider divides a first output voltage on a first output voltage line to a first divided output voltage. The voltage divider comprises a first metal foil and a first capacitor. The first metal foil and the first output voltage line can form a first capacitive component. The first capacitive component is coupled in series with the first capacitor. The first capacitive component and the first capacitor can generate the first divided output voltage. The voltage rectifier is coupled to the voltage divider and can rectify the first divided output voltage to a sensing voltage indicative of the first output voltage.
    Type: Grant
    Filed: June 22, 2009
    Date of Patent: March 6, 2012
    Assignee: O2Micro International Limited
    Inventors: Youling Li, Yingpeng Hu, Xiaojun Wang
  • Circuits and methods for balancing current among multiple loads
    Patent number: 8058809
    Abstract: A circuit comprises a power tank, a pair of transformers and multiple loads. The power tank converts a DC input voltage to an AC voltage. The pair of transformers comprise a pair of primary windings and a pair of secondary windings and transform the intermediate AC voltage to an output AC voltage. The pair of primary windings are coupled to the power tank for receiving the intermediate AC voltage, and the pair of secondary windings provide the output AC voltage. The loads are coupled to the pair of secondary windings for receiving the output AC voltage. The pair of secondary windings are serially coupled to each other through the series-coupled loads to achieve current balance among the loads.
    Type: Grant
    Filed: July 1, 2008
    Date of Patent: November 15, 2011
    Assignee: O2Micro, Inc.
    Inventors: Youling Li, Sheng Tai Lee, Yingpeng Hu
  • VOLTAGE SENSING CIRCUITS AND METHODS FOR INVERTERS
    Publication number: 20090256490
    Abstract: A voltage sensing circuit includes a voltage divider and a voltage rectifier. The voltage divider divides a first output voltage on a first output voltage line to a first divided output voltage. The voltage divider comprises a first metal foil and a first capacitor. The first metal foil and the first output voltage line can form a first capacitive component. The first capacitive component is coupled in series with the first capacitor. The first capacitive component and the first capacitor can generate the first divided output voltage. The voltage rectifier is coupled to the voltage divider and can rectify the first divided output voltage to a sensing voltage indicative of the first output voltage.
    Type: Application
    Filed: June 22, 2009
    Publication date: October 15, 2009
    Inventors: Youling Li, Yingpeng Hu, Xiaojun Wang
  • Circuits and methods for voltage sensing
    Patent number: 7554319
    Abstract: A voltage sensing circuit includes a voltage divider and a voltage rectifier. The voltage divider divides a first output voltage on a first output voltage line to a first divided output voltage. The voltage divider comprises a first metal foil and a first capacitor. The first metal foil and the first output voltage line can form a first capacitive component. The first capacitive component is coupled in series with the first capacitor. The first capacitive component and the first capacitor can generate the first divided output voltage. The voltage rectifier is coupled to the voltage divider and can rectify the first divided output voltage to a sensing voltage indicative of the first output voltage.
    Type: Grant
    Filed: February 28, 2008
    Date of Patent: June 30, 2009
    Inventors: Youling Li, Yingpeng Hu, Xiaojun Wang
  • Circuits and methods for balancing current among multiple loads
    Publication number: 20090009097
    Abstract: A circuit comprises a power tank, a pair of transformers and multiple loads. The power tank converts a DC input voltage to an AC voltage. The pair of transformers comprise a pair of primary windings and a pair of secondary windings and transform the intermediate AC voltage to an output AC voltage. The pair of primary windings are coupled to the power tank for receiving the intermediate AC voltage, and the pair of secondary windings provide the output AC voltage. The loads are coupled to the pair of secondary windings for receiving the output AC voltage. The pair of secondary windings are serially coupled to each other through the series-coupled loads to achieve current balance among the loads.
    Type: Application
    Filed: July 1, 2008
    Publication date: January 8, 2009
    Inventors: Youling Li, Sheng Tai Lee, Yingpeng Hu