Patents by Inventor Wang Jianqin

Wang Jianqin 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).

  • 90° phase shifter and image rejection mixer
    Patent number: 6321076
    Abstract: A phase shift circuit includes a first phase shifter, second phase shifter, and adder. The first phase shifter receives an input signal and obtains first and second intermediate phase shift signals having different phases. The second phase shifter obtains first and second outputs by shifting phases of the first and second intermediate phase shift signals. The adder generates a phase shift output signal by adding the first and second outputs from the second phase shifter. A phase shifting device, oscillation circuit, and image rejection mixer are also disclosed.
    Type: Grant
    Filed: July 15, 1999
    Date of Patent: November 20, 2001
    Assignee: NEC Corporation
    Inventor: Wang Jianqin