US 11,990,931 B2
Transceiver and calibration method
Yi-Shao Chang, Hsinchu (TW)
Assigned to Realtek Semiconductor Corporation, Hsinchu (TW)
Filed by Realtek Semiconductor Corporation, Hsinchu (TW)
Filed on Sep. 6, 2022, as Appl. No. 17/929,750.
Claims priority of application No. 111116975 (TW), filed on May 5, 2022.
Prior Publication US 2023/0361801 A1, Nov. 9, 2023
Int. Cl. H04B 1/40 (2015.01); H03H 11/04 (2006.01); H04B 17/11 (2015.01)
CPC H04B 1/40 (2013.01) [H03H 11/04 (2013.01); H04B 17/11 (2015.01)] 20 Claims
OG exemplary drawing
 
1. A transceiver, comprising:
a Radio Frequency (RF) modulator;
a filter circuit, connected to the RF modulator, and the filter circuit supplying a phase sequence to the RF modulator, and wherein the RF modulator outputs a RF signal according to the phase sequence;
a control circuit, connected to the RF modulator and the filter circuit, wherein the control circuit is configured to:
during a first calibration period, control the filter circuit to be connected to the RF modulator and supply to the RF modulator a first phase sequence, and wherein in response to the filter circuit being connected to the RF modulator and supplied with the first phase sequence, the RF modulator outputs a first RF signal;
during a second calibration period, control the filter circuit to be connected to the RF modulator and supply a second phase sequence, and wherein in response to the filter circuit being connected to the RF modulator and supplied with the second phase sequence, the RF modulator outputs a second RF signal; and
calculate a first Direct Current (DC) offset generated from the filter circuit according to the first RF signal and the second RF signal; and
a first DC offset compensation circuit, connected to the filter circuit and the control circuit, wherein the control circuit is further configured to control the first DC offset compensation circuit to compensate the first DC offset generated from the filter circuit.