Patents by Inventor Zhao-Cai Zhang

Zhao-Cai Zhang 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).

  • Driving circuit for providing constant current
    Patent number: 7714812
    Abstract: A driving circuit comprising a reference-voltage circuit, an amplifier, an adjusting circuit, and a current-setting circuit. The reference-voltage circuit is used for generating a reference voltage. The amplifier comprises a first input terminal used for receiving the reference voltage, a second input terminal used for receiving feedback voltage from a load, and an output terminal used for outputting an output current to the load. The adjusting circuit is used for adjusting a voltage of the load when a resistance of the load changes. The current-setting circuit is used for setting a value of the output current based on the feedback voltage.
    Type: Grant
    Filed: November 28, 2006
    Date of Patent: May 11, 2010
    Assignees: Hong Fu Jin Precision Industry (Shen Zhen) Co., Ltd., Hon Hai Precision Industry Co., Ltd.
    Inventors: Kai Dou, Zhang-Xiang Hu, Cho-Chuan Yang, Zhao-Cai Zhang, Jian-De Qing
  • DRIVING CIRCUIT FOR PROVIDING CONSTANT CURRENT
    Publication number: 20080122385
    Abstract: A driving circuit comprising a reference-voltage circuit, an amplifier, an adjusting circuit, and a current-setting circuit. The reference-voltage circuit is used for generating a reference voltage. The amplifier comprises a first input terminal used for receiving the reference voltage, a second input terminal used for receiving feedback voltage from a load, and an output terminal used for outputting an output current to the load. The adjusting circuit is used for adjusting a voltage of the load when a resistance of the load changes. The current-setting circuit is used for setting a value of the output current based on the feedback voltage.
    Type: Application
    Filed: November 28, 2006
    Publication date: May 29, 2008
    Applicant: HON HAI PRECISION INDUSTRY CO., LTD.
    Inventors: Kai Dou, Zhang-Xiang Hu, Cho-Chuan Yang, Zhao-Cai Zhang, Jian-De Qing