公开(公告)号：US11201600B1

公开(公告)日：2021-12-14

申请号：US16948887

申请日：2020-10-05

Applicant: Analog Devices, Inc.

Inventor： Christoph M. Steinbrecher ,  Ekrem Oran ,  Xizhen Xu ,  Christopher Mayer

IPC: H03H7/12

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.