Patents by Inventor Ching-I Chien

Ching-I Chien 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).

  • Digital-controlled vector signal modulator
    Patent number: 10476717
    Abstract: A vector modulator includes a quadrature component generator, configured to generate an input in-phase signal and an input quadrature signal according to an input radio frequency (RF) signal; a switching circuit, receiving a plurality of bits, comprising a plurality of switches controlled by the plurality of bits, configured to generate an output in-phase signal and an output quadrature signal according to the plurality of bits, where the output in-phase signal and the output quadrature signal are related to input in-phase signal and the input quadrature signal; and a combining module, configured to generate an output RF signal according to the output in-phase signal and the output quadrature signal.
    Type: Grant
    Filed: December 27, 2018
    Date of Patent: November 12, 2019
    Assignee: National Chung-Shan Institue of Science and Technology
    Inventors: Tao Wang, Hung-Ting Chou, Chien-Te Yu, Ching-I Chien