US 11,863,127 B2
Amplifier device
Yang Chang, Hsinchu (TW); Kuan-Yu Shih, Hsinchu (TW); Chia-Jun Chang, Hsinchu (TW); and Ka-Un Chan, Hsinchu (TW)
Assigned to REALTEK SEMICONDUCTOR CORPORATION, Hsinchu (TW)
Filed by Realtek Semiconductor Corporation, Hsinchu (TW)
Filed on Apr. 19, 2021, as Appl. No. 17/233,764.
Claims priority of application No. 109142505 (TW), filed on Dec. 2, 2020.
Prior Publication US 2022/0173701 A1, Jun. 2, 2022
Int. Cl. H03F 3/04 (2006.01); H03F 1/22 (2006.01); H03F 1/02 (2006.01); H03F 3/193 (2006.01); H03F 1/56 (2006.01)
CPC H03F 1/0211 (2013.01) [H03F 3/193 (2013.01); H03F 1/56 (2013.01); H03F 2200/222 (2013.01); H03F 2200/387 (2013.01); H03F 2200/451 (2013.01); H03F 2200/522 (2013.01)] 19 Claims
OG exemplary drawing
 
1. An amplifier device, comprising:
a regulator circuit configured to output a first driving voltage;
a first voltage converting circuit coupled to the regulator circuit, configured to receive the first driving voltage, and select one of the first driving voltage and at least one first voltage related to the first driving voltage in order to output a first operating voltage;
a first control circuit coupled to the first voltage converting circuit through a first node, and configured to receive the first operating voltage, and generate a first operating signal according to the first operating voltage and a first control signal; and
an amplifier circuit coupled to the first control circuit and the regulator circuit, configured to receive the first driving voltage, and controlled by the first operating signal to generate an output voltage.