Patents by Inventor Xizhen Xu

Xizhen Xu 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).

  • Apparatus and methods for control and calibration of tunable filters
    Patent number: 11201600
    Abstract: Apparatus and methods for control and calibration of tunable filters are provided. In certain embodiments, a tunable filter includes at least one controllable component (for instance, a controllable inductor or a controllable capacitor) having a value that changes or adjusts a center frequency of the tunable filter. For example, the controllable component can correspond to a controllable inductor or a controllable capacitor of an inductor-capacitor (LC) resonator of the tunable filter. The tunable filter further includes a control circuit implemented with an approximation function for estimating a value of the controllable component for achieving a desired center frequency indicated by a frequency control signal.
    Type: Grant
    Filed: October 5, 2020
    Date of Patent: December 14, 2021
    Assignee: Analog Devices, Inc.
    Inventors: Christoph M. Steinbrecher, Ekrem Oran, Xizhen Xu, Christopher Mayer