Calibration of Adjustable Filters
AssigneeIntersil Americas Inc.
InventorsWilhelm Steffen Hahn, Wei Chen
Life of this patent
Estimating the term…
Abstract
A filter controller. In one embodiment, the filter controller includes a first mechanism for providing an input signal to an adjustable filter. A second mechanism measures a response of the adjustable filter to the input signal and provides a second signal in response thereto. A third mechanism sets one or more parameters of the adjustable filter in response to the second signal. In a more specific embodiment, the adjustable filter includes one or more sub-filters, such as a canceller filter, which may be any filter that employs one or more portions or versions of a signal to selectively cancel one or more portions or versions, such as frequency components, of the same signal.
Claims35
A filter controller comprising:
- first means for providing an input signal to an adjustable filter;
- second means for measuring a response of the adjustable filter to the input signal and providing a second signal in response thereto;
- and
- third means for setting one or more parameters of the adjustable filter in response to the second signal.
A method for implementing dynamic filter calibration, the method comprising:
- sensing a first condition and providing a first signal in response thereto;
- employing the first signal to determine one or more values for one or more circuit parameters of an adjustable filter;
- and
- setting the one or more circuit parameters of the adjustable filter based on the one or more values to thereby selectively adjust a frequency response of the adjustable filter.
A method for calibrating a circuit module, the method comprising:
- powering the circuit module so that the circuit module resonates, yielding an oscillating output signal in response thereto;
- comparing a resonating frequency characterizing the output signal to a reference signal characterized by a reference frequency;
- and
- adjusting one or more parameters of the circuit module to suppress output power of the circuit module when a signal characterized by the reference frequency.
A method for calibrating a circuit module, the method comprising:
- inputting a pilot signal to the circuit module, wherein the pilot signal is characterized by a frequency corresponding to a desired notch frequency of a frequency response of the circuit module;
- and
- adjusting one or more characteristics of one or more circuit components of the circuit module until an output power of the circuit module exhibits a desired characteristic.
Dependencies are inferred from the claim text.