Patents by Inventor Snow Qi

Snow Qi 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).

  • Level shifting circuit for high voltage applications
    Patent number: 8854106
    Abstract: A level shifting circuit includes a current mirror that generates a first bias current and a second bias current (proportional to the first bias current with a first ratio). A first level shifter is coupled between a first input node (receiving a first input signal) and a first output node coupled to an input of the current mirror. The first level shifter applies a first voltage variation to the first input signal in response to the first bias current. A second level is coupled between a second input node (receiving a second input signal) and a second output node coupled to an output of the current mirror. The second level shifter applies a second voltage variation (associated with the first voltage variation) to the second input signal in response to the second bias current.
    Type: Grant
    Filed: June 24, 2013
    Date of Patent: October 7, 2014
    Assignee: STMicroelectronics R&D (Shanghai) Co. Ltd.
    Inventors: Fei Wang, Snow Qi, Jackson Ding
  • LEVEL SHIFTING CIRCUIT FOR HIGH VOLTAGE APPLICATIONS
    Publication number: 20140009201
    Abstract: A level shifting circuit includes a current mirror that generates a first bias current and a second bias current (proportional to the first bias current with a first ratio). A first level shifter is coupled between a first input node (receiving a first input signal) and a first output node coupled to an input of the current mirror. The first level shifter applies a first voltage variation to the first input signal in response to the first bias current. A second level is coupled between a second input node (receiving a second input signal) and a second output node coupled to an output of the current mirror. The second level shifter applies a second voltage variation (associated with the first voltage variation) to the second input signal in response to the second bias current.
    Type: Application
    Filed: June 24, 2013
    Publication date: January 9, 2014
    Inventors: Fei Wang, Snow Qi, Jackson Ding