US 12,395,253 B2
Transmitter and power calibration method
Chia-Wei Huang, Hsinchu (TW); and Yi-Hua Lu, Hsinchu (TW)
Assigned to REALTEK SEMICONDUCTOR CORPORATION, Hsinchu (TW)
Filed by REALTEK SEMICONDUCTOR CORPORATION, Hsinchu (TW)
Filed on Jun. 1, 2023, as Appl. No. 18/204,399.
Claims priority of application No. 111123459 (TW), filed on Jun. 23, 2022.
Prior Publication US 2023/0421271 A1, Dec. 28, 2023
Int. Cl. H04B 17/12 (2015.01); H04B 17/10 (2015.01); H04B 17/318 (2015.01)
CPC H04B 17/12 (2015.01) [H04B 17/102 (2015.01); H04B 17/318 (2015.01)] 20 Claims
OG exemplary drawing
 
1. A transmitter, comprising:
a transmitter circuit coupled to a power node to receive a supply voltage and configured to transmit an output signal via an antenna;
a calibration circuit configured to sense a current of the power node to generate a first signal having a first value when the transmitter circuit operates in a first frequency band, sense the current to generate the first signal having a second value when the transmitter circuit operates in a second frequency band, and generate a calibration signal according to the first signal having the first value and the first signal having the second value; and
a transmitter signal strength indicator circuit configured to detect power of the output signal to generate a first detection signal, and generate a second detection signal according to the calibration signal and the first detection signal,
wherein the transmitter circuit is further configured to adjust the power of the output signal to be target power according to the second detection signal.