公开(公告)号：KR101467231B1

公开(公告)日：2014-12-01

申请号：KR1020140019119

申请日：2014-02-19

Applicant: 성균관대학교산학협력단

Inventor： 양영구 ,  함정현 ,  정혜련

IPC: H03F1/02 ,  H03F1/30

CPC classification number: H03F1/0205 ,  H03F1/0211 ,  H03F1/0222 ,  H03F1/0227 ,  H03F1/305 ,  H03F3/19 ,  H03F3/211 ,  H03F3/217 ,  H03F2200/102 ,  H03F2200/451 ,  H03F2200/507 ,  H03F2203/21127 ,  H03G3/20

Abstract: An envelope tracking power amplifier according to embodiments of the present invention includes: a multi-mode bias modulator to generate a variable bias voltage using a linear amplifier and a switching amplifier operated in an envelope tracking mode or an average power tracking mode according to an operation mode control signal for determining one operation mode from the envelope tracking mode or the average power tracking mode; and a power amplifier biased according to a variable bias voltage to power-amplify and output an RF signal to an antenna. When the multi-mode bias modulator operates in the envelope tracking mode, the multi-mode bias modulator drives a linear amplification bias current corresponding to AC components of the envelope signal by the linear amplifier. The multi-mode bias modulator drives a switching amplification bias current corresponding to DC components of the envelope signal by the switching amplifier. The multi-mode bias modulator combines a linear amplification bias current with the switching amplification bias current to generate a variable bias current. When the multi-mode bias modulator operates in the average power tracking mode, the multi-mode bias modulator may drive a switching amplification bias current tracking a predetermined reference voltage by the switching amplifier to generate a variable bias current.

Abstract translation: 根据本发明的实施例的包络跟踪功率放大器包括：多模式偏置调制器，其使用线性放大器和按照操作的包络跟踪模式或平均功率跟踪模式操作的开关放大器来产生可变偏置电压 模式控制信号，用于从包络跟踪模式或平均功率跟踪模式确定一个操作模式; 以及根据可变偏置电压偏置的功率放大器，以将RF信号功率放大并输出到天线。 当多模偏置调制器以包络跟踪模式工作时，多模偏置调制器通过线性放大器驱动对应于包络信号的AC分量的线性放大偏置电流。 多模偏置调制器通过开关放大器驱动对应于包络信号的DC分量的开关放大偏置电流。 多模偏置调制器将线性放大偏置电流与开关放大偏置电流组合以产生可变偏置电流。 当多模偏置调制器在平均功率跟踪模式下工作时，多模偏置调制器可以通过开关放大器驱动跟踪预定参考电压的开关放大偏置电流，以产生可变偏置电流。