US 12,451,845 B2
Transmission circuit and operation method having output power compensation mechanism
Beng-Meng Chen, Hsinchu (TW); Chien-Jung Huang, Hsinchu (TW); and Jhih-Yuan Ke, Hsinchu (TW)
Assigned to REALTEK SEMICONDUCTOR CORPORATION, Hsinchu (TW)
Filed by REALTEK SEMICONDUCTOR CORPORATION, Hsinchu (TW)
Filed on Nov. 2, 2022, as Appl. No. 17/979,356.
Claims priority of application No. 110141208 (TW), filed on Nov. 4, 2021.
Prior Publication US 2023/0133223 A1, May 4, 2023
Int. Cl. H03F 1/30 (2006.01); H03F 3/19 (2006.01); H03G 3/30 (2006.01); H04B 1/04 (2006.01)
CPC H03F 1/30 (2013.01) [H03F 3/19 (2013.01); H03G 3/3036 (2013.01); H04B 1/04 (2013.01); H03F 2200/447 (2013.01); H03F 2200/451 (2013.01); H03F 2200/468 (2013.01); H03G 2201/103 (2013.01); H03G 2201/307 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A transmission circuit having output power compensation mechanism, comprising:
a base-band and processing circuit configured to receive and process a digital input signal to perform conversion and amplification according to a plurality of gain parameters to generate an analog output signal;
a frequency up-converting circuit configured to perform frequency up-conversion on the analog output signal to generate a RF signal;
a RF amplification circuit configured to amplify the RF signal to generate an output RF signal to an antenna;
a temperature monitoring circuit configured to monitor and generate an instant temperature value of the RF amplification circuit; and
a calibration circuit comprising:
a digital gain compensation circuit configured to, when a first time that the transmission circuit performs signal transmission exceeds a first time threshold and when the instant temperature value is larger than a pre-stored reference temperature value to makes a power of the RF amplification circuit decrease, increase a digital gain parameter comprised by the gain parameters with a first degree of adjustment; and
an analog gain compensation circuit configured to, when a second time that the transmission circuit does not operate exceeds a second time threshold and when the instant temperature value is smaller than the reference temperature value to makes the power of the RF amplification circuit increase, decrease an analog gain parameter comprised by the gain parameters with a second degree of adjustment;
wherein the first degree is less than the second degree.