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    • 8. 发明授权
    • Radio frequency power amplifier
    • 射频功率放大器
    • US08134409B2
    • 2012-03-13
    • US12823474
    • 2010-06-25
    • Masato SekiMasahiro MaedaMasatosi Kamitani
    • Masato SekiMasahiro MaedaMasatosi Kamitani
    • H03F3/68
    • H03F3/195H03F1/0205H03F1/56H03F3/60H03F2200/451
    • A radio frequency power amplifier includes an input terminal to which a radio frequency signal is applied; a first hetero-bipolar transistor (HBT), which amplifies the radio frequency signal; a second HBT, which amplifies the radio frequency signal; a matching circuit connected to an output node of the second HBT; a switch connected to an output node of the matching circuit; and an output matching circuit connected to an output node of the first HBT. The output node of the switch is connected to the output node of the first HBT via the output matching circuit, and an impedance looking into an output side of the radio frequency power amplifier from the output node of the switch is higher than an impedance looking into the output side of the radio frequency power amplifier from the output node of the first HBT.
    • 射频功率放大器包括施加射频信号的输入端子; 放大射频信号的第一异质双极晶体管(HBT); 第二个HBT放大射频信号; 连接到第二HBT的输出节点的匹配电路; 连接到匹配电路的输出节点的开关; 以及连接到第一HBT的输出节点的输出匹配电路。 开关的输出节点经由输出匹配电路连接到第一HBT的输出节点,并且从开关的输出节点看入射频功率放大器的输出侧的阻抗高于阻抗 射频功率放大器的输出端从第一个HBT的输出节点。