Power detector device and method of calibrating detection power range
AssigneeRealtek Semiconductor Corp.
InventorsChien-I Chou, Ling Lee
Life of this patent
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Abstract
A power detector device includes a power detector circuit, a filter circuit, and a calibration circuitry. The power detector circuit is configured to detect a first signal to generate a second signal. The filter circuit is configured to filter the second signal to generate a third signal. The calibration circuitry is configured to determine first signal strength information in response to the third signal, adjust a gain of the power detector circuit to obtain second signal strength information, and combine the first signal strength information and the second signal strength information, in order to calibrate a detection power range of the power detector circuit to be linear.
Claims18
A power detector device, comprising:
- a power detector circuit configured to detect a first signal to generate a second signal;
- a filter circuit configured to filter the second signal to generate a third signal;
- and
- a calibration circuitry configured to determine first signal strength information in response to the third signal, adjust a gain of the power detector circuit to obtain second signal strength information, and combine the first signal strength information and the second signal strength information, in order to calibrate a detection power range of the power detector circuit to be linear,
- wherein the calibration circuitry is a circuit portion in a receiver circuit, and the calibration circuitry comprises:
- a multiplexer circuit configured to selectively output the third signal or a fourth signal from the receiver circuit to be a fifth signal;
- an analog to digital converter circuit configured to convert the fifth signal into a digital signal;
- and
- a baseband circuit configured to analyze the digital signal to obtain the first signal strength information and the second signal strength information, and combine the first signal strength information and the second signal strength information to calibrate the detection power range.
A method of calibrating detection power range, comprising:
- detecting, by a power detector circuit, a first signal to generate a second signal;
- filtering the second signal to generate a third signal;
- determining first signal strength information in response to the third signal;
- and
- adjusting a gain of the power detector circuit to obtain second signal strength information, and combining the first signal strength information and the second signal strength information to calibrate a detection power range of the power detector circuit to be linear,
- wherein combining the first signal strength information and the second signal strength information to calibrate the detection power range of the power detector circuit to be linear comprises:
- selectively outputting the third signal or a fourth signal from a receiver circuit to be a fifth signal;
- converting the fifth signal into a digital signal;
- and
- analyzing the digital signal to obtain the first signal strength information and the second signal strength information, and combining the first signal strength information and the second signal strength information to calibrate the detection power range.
Dependencies are inferred from the claim text.