公开(公告)号：KR1020040045147A

公开(公告)日：2004-06-01

申请号：KR1020020073181

申请日：2002-11-22

Applicant: 한국과학기술원

Inventor： 이귀로 ,  강규철

IPC: H03F1/08

Abstract: PURPOSE: A high-efficient power amplifier is provided to enhance the efficiency by controlling a bias voltage and changing the load impedance according to each operation level. CONSTITUTION: A high-efficient power amplifier includes an input terminal and an output terminal to amplify a received signal and output the amplified signal. The high-efficient power amplifier further includes a bias control unit and an impedance matching unit. The bias control unit(330) is connected to the input terminal in order to control a bias voltage applied to the input terminal. The impedance matching unit(350) is connected between the output terminal and a load resistance in order to change a load impedance value of the power amplifier. The bias control unit sets up the bias voltage at a back-off point of the power amplifier in a maximum power mode and applies lower voltage than the bias voltage to the power amplifier in a normal mode. The impedance matching unit sets up the load impedance at OP1dB in the maximum power mode and changes the load impedance to the lower impedance than the load impedance in the normal mode.

Abstract translation: 目的：提供高效功率放大器，通过控制偏置电压和根据每个操作级别改变负载阻抗来提高效率。 构成：高效功率放大器包括输入端和输出端，用于放大接收信号并输出​​放大信号。 高效率功率放大器还包括偏置控制单元和阻抗匹配单元。 偏置控制单元（330）连接到输入端子，以便控制施加到输入端子的偏置电压。 阻抗匹配单元（350）连接在输出端子和负载电阻之间，以便改变功率放大器的负载阻抗值。 偏置控制单元以最大功率模式在功率放大器的退避点处建立偏置电压，并且以正常模式将低于偏置电压的电压施加到功率放大器。 阻抗匹配单元在最大功率模式下将负载阻抗设置在OP1dB，并将负载阻抗改变为比正常模式下的负载阻抗更低的阻抗。