Patents by Inventor Zhenbiao Cai

Zhenbiao Cai 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).

  • Accurate current sensing circuit with ultra low voltage supply
    Patent number: 8487594
    Abstract: An integrated circuit includes a DC-DC converter, which includes an inductor; a first transistor coupled to the inductor and configured to pass an inductor current to the inductor; and a second transistor forming a current mirror with the first transistor. The integrated circuit further includes an operational amplifier. The operational amplifier includes a first input node and a second input node. The first input node is configured to couple to a drain of the first transistor when the first transistor is turned on, and decoupled from the drain of the first transistor when the first transistor is turned off. The second input node is coupled to a drain of the second transistor.
    Type: Grant
    Filed: October 11, 2010
    Date of Patent: July 16, 2013
    Assignee: STMicroelectronics (Shenzhen) R&D Co., Ltd.
    Inventors: Zhenbiao Cai, Haibo Zhang
  • Accurate Current Sensing Circuit with Ultra Low Voltage Supply
    Publication number: 20110089923
    Abstract: An integrated circuit includes a DC-DC converter, which includes an inductor; a first transistor coupled to the inductor and configured to pass an inductor current to the inductor; and a second transistor forming a current mirror with the first transistor. The integrated circuit further includes an operational amplifier. The operational amplifier includes a first input node and a second input node. The first input node is configured to couple to a drain of the first transistor when the first transistor is turned on, and decoupled from the drain of the first transistor when the first transistor is turned off. The second input node is coupled to a drain of the second transistor.
    Type: Application
    Filed: October 11, 2010
    Publication date: April 21, 2011
    Applicant: STMicroelectronics (Shenzhen) R&D Co. Ltd
    Inventors: Zhenbiao Cai, Haibo Zhang