DIRECT CURRENT OFFSET CALIBRATION DEVICE ON THE RECEIVING PATH AND DIRECT CURRENT OFFSET CALIBRATION METHOD THEREOF
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United States of America Patent
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Issued Date -
Jun 6, 2024
app pub date -
Dec 16, 2022
filing date -
Dec 5, 2022
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Abstract
A direct current (DC) offset calibration device and a method are used to calibrate a DC offset of a unit. The DC offset calibration device includes a signal generation unit, a to-be-calibrated unit, a measurement unit, and a compensation unit. The DC offset calibration method includes: using the to-be-calibrated unit to output a clipped signal resulting from a signal saturation effect; receiving a receiving signal correlated to the clipped signal, the receiving signal including an even harmonic resulting from the clipped signal; measuring a magnitude of the even harmonic to obtain a DC offset adjustment value accordingly; and adjusting the to-be-calibrated unit according to the DC offset adjustment value to calibrate the DC offset.
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