METHOD AND CIRCUIT FOR CALIBRATING ANALOG CIRCUIT COMPONENTS
First Claim
1. A method for calibrating an analog component, comprising the steps of:
- generating a first signal with a baseband frequency;
passing the first signal through the analog component to be calibrated to generate a second signal;
passing the second signal through a power amplifier to generate a third signal, wherein the power amplifier operates in a nonlinear region;
filtering out a high-frequency component of the third signal to generate a fourth signal with a baseband frequency; and
adjusting calibration parameters corresponding to an In-phase-Quadrature-phase imbalance (IQ imbalance) if the fourth signal shows the IQ imbalance, and re-executing the step of generating a first signal according to the calibration parameters.
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Abstract
A method for calibrating an analog circuit component comprises the steps of: generating a first signal with a baseband frequency; generating a second signal by processing the first signal via the analog component to be calibrated; generating a third signal by processing the second signal via a power amplifier, wherein the power amplifier operates in a nonlinear region; generating a fourth signal by processing the third signal via a low-pass filter; and defining the adjustment for the In-phase-Quadrature-phase imbalance (IQ imbalance) of the analog component and then re-executing the step of generating the first signal, if the fourth signal shows an IQ imbalance mismatch.
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Citations
19 Claims
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1. A method for calibrating an analog component, comprising the steps of:
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generating a first signal with a baseband frequency; passing the first signal through the analog component to be calibrated to generate a second signal; passing the second signal through a power amplifier to generate a third signal, wherein the power amplifier operates in a nonlinear region; filtering out a high-frequency component of the third signal to generate a fourth signal with a baseband frequency; and adjusting calibration parameters corresponding to an In-phase-Quadrature-phase imbalance (IQ imbalance) if the fourth signal shows the IQ imbalance, and re-executing the step of generating a first signal according to the calibration parameters. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A circuit for calibrating an analog component, comprising:
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a power amplifier operating in a nonlinear region and configured to amplify an output signal of the analog component to be calibrated; a low-pass filter configured to filter an output signal of the power amplifier; an analog-to-digital converter configured to convert an output signal of the low-pass filter; and a spectrum analysis unit configured to analyze an output signal of the analog-to-digital converter. - View Dependent Claims (10, 11, 12, 13)
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14. A method for calibrating a wireless transceiver, comprising the steps of:
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generating a first signal with a baseband frequency; passing the first signal through analog component to be calibrated to generate a second signal; passing the second signal through a power amplifier to generate a third signal, wherein the power amplifier operates in a nonlinear region; filtering out a high-frequency component of the third signal to generate a fourth signal with a baseband frequency; and emitting the fourth signal on a carrier frequency, adjusting calibration parameters corresponding to an In-phase-Quadrature-phase imbalance (IQ imbalance) if the fourth signal shows the IQ imbalance, and re-executing the step of generating a first signal according to the calibration parameters. - View Dependent Claims (15, 16, 17)
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18. A wireless transceiver, comprising:
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a power amplifier operating in a nonlinear region configured to amplify an output signal of analog component to be calibrated; a low-pass filter configured to filter an output signal of the power amplifier; an analog-to-digital converter configured to convert an output signal of the low-pass filter; a spectrum analysis unit configured to analyze an output signal of the analog-to-digital converter; and an antenna configured to emit an output signal of the power amplifier on a carrier frequency. - View Dependent Claims (19)
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Specification