Systems and methods for low pass filter mismatch calibration
AssigneeMarvell World Trade Ltd.
InventorWen-Yen Weng
Life of this patent
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Abstract
System and methods are provided for calibration of low pass filter mismatch. An example system includes: a tone generator configured to generate a tone signal with a baseband frequency value; one or more low pass filters configured to filter one or more analog signals associated with the tone signal; one or more analog-to-digital converters (ADCs) configured to generate one or more aliases associated with the one or more analog signals; and a calibration processor configured to detect low pass filter mismatch based at least in part on the one or more aliases associated with the tone signal.
Claims15
A system for calibration of low pass filter mismatch, the system comprising:
- a tone generator configured to generate a tone signal with a baseband frequency value;
- low pass filters configured to filter one or more analog signals derived from the tone signal;
- one or more analog-to-digital converters (ADCs) configured to input signals derived from the filtered one or more analog signals to generate output signals that include one or more aliases;
- and
- a calibration processor configured to detect low pass filter mismatch based at least in part on the one or more aliases included in the output signals from the ADCs, wherein the calibration processor is configured to operate at a sampling rate lower than a Nyquist rate associated with the tone signal.
A method for calibration of low pass filter mismatch, the method comprising:
- generating tone signal with a baseband frequency value;
- filtering, by low pass filters, one or more analog signals derived from the tone signal;
- generating one or more aliases from input signals that are derived from the filtered one or more analog signals, wherein generating one or more aliases associated with the one or more analog signals includes performing sampling at a sampling rate lower than a Nyquist rate associated with the tone signal;
- and
- detecting low as filter mismatch based at least in part on the one or more aliases.
Dependencies are inferred from the claim text.