US 12,407,430 B2
Direct current offset calibration device on the receiving path and direct current offset calibration method thereof
Shun-Pin Yang, Taipei (TW)
Assigned to RichWave Technology Corp., Taipei (TW)
Filed by RichWave Technology Corp., Taipei (TW)
Filed on Dec. 16, 2022, as Appl. No. 18/082,592.
Claims priority of application No. 111146525 (TW), filed on Dec. 5, 2022.
Prior Publication US 2024/0187112 A1, Jun. 6, 2024
Int. Cl. H04B 17/21 (2015.01); H03D 3/00 (2006.01); H04B 17/00 (2015.01)
CPC H04B 17/21 (2015.01) [H03D 3/008 (2013.01); H04B 17/0085 (2013.01); H03D 2200/0047 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A direct current (DC) offset calibration device comprising:
a signal generation unit configured to provide a first signal;
a to-be-calibrated unit coupled to the signal generation unit, the to-be-calibrated unit being configured to receive the first signal and output a second signal accordingly, wherein the second signal is a clipped signal;
a measurement unit coupled to the to-be-calibrated unit, the measurement unit being configured to receive a receiving signal correlated to the second signal, the receiving signal comprising an even harmonic resulted from the clipped signal, the measurement unit being configured to measure a magnitude of the even harmonic; and
a compensation unit coupled to the measurement unit and the to-be-calibrated unit, the compensation unit being configured to compute and obtain a DC offset adjustment value according to the magnitude of the even harmonic, and to adjust the to-be-calibrated unit according to the DC offset adjustment value.