Patents by Inventor Xufeng Bao

Xufeng Bao 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).

  • Phase-locked loop with a sampling circuit
    Patent number: 11063598
    Abstract: A phase-locked loop (PLL) includes a voltage-controlled oscillator (VCO) that generates a PLL output signal having an oscillation frequency controlled by a control signal; a phase detector that generates a phase signal representing a difference in phase between the PLL output signal and a reference signal; a loop filter coupled to receive the phase signal; a switch; and a sampling circuit switchably coupled to receive the control signal of the VCO via the switch, and generating a code representing the control signal.
    Type: Grant
    Filed: October 16, 2020
    Date of Patent: July 13, 2021
    Assignee: Himax Imaging Limited
    Inventors: Xufeng Bao, Hack Soo Oh, Youngchul Sohn, Amit Mittra