公开(公告)号：US20150288338A1

公开(公告)日：2015-10-08

申请号：US14279697

申请日：2014-05-16

申请人： AIROHA TECHNOOGY CORP.

发明人： YU-HUA LIU ,  TING-YAO HUANG ,  JOHN-SAN YANG

IPC分类号： H03G3/00 ,  H03F3/21 ,  H03F3/45 ,  H03F3/193

CPC分类号： H03G3/007 ,  H03F1/0266 ,  H03F1/223 ,  H03F3/193 ,  H03F3/245 ,  H03F3/45179 ,  H03F3/45183 ,  H03F3/45475 ,  H03F2200/102 ,  H03F2200/105 ,  H03F2200/211 ,  H03F2200/451 ,  H03F2200/465 ,  H03F2200/555 ,  H03F2203/45112 ,  H03F2203/45594 ,  H03F2203/45596 ,  H03F2203/45631 ,  H03F2203/45702 ,  H03G3/3042

摘要： The invention provides a power amplifier circuit capable of adjusting gain dynamically. The power amplifier circuit comprises a power supply unit configured to provide a power supply signal; an input power detection unit for receiving at least one input signal and the power supply signal, detecting the power of the input signal to generate a detection signal, and pulling up or down a bias signal by the detection signal; a power amplifier unit for receiving the input signal and the bias signal, adjusting the gain by the controlling of the bias signal, and amplifying the input signal by the adjusted gain to output at least one output signal. Therefore, the gain of power amplifier circuit will be adjusted dynamically by detecting the power of the input signal, so that the output signal conforming to the actual power may be outputted.

摘要翻译： 本发明提供一种能够动态地调节增益的功率放大器电路。 功率放大器电路包括被配置为提供电源信号的电源单元; 输入功率检测单元，用于接收至少一个输入信号和电源信号，检测输入信号的功率以产生检测信号，以及通过检测信号提升或降低偏置信号; 功率放大器单元，用于接收输入信号和偏置信号，通过控制偏置信号来调节增益，并通过调整后的增益放大输入信号以输出至少一个输出信号。 因此，通过检测输入信号的功率，可以动态调整功率放大电路的增益，从而输出符合实际功率的输出信号。