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    • 7. 发明申请
    • POWER AMPLIFIER
    • 功率放大器
    • US20080079487A1
    • 2008-04-03
    • US11859313
    • 2007-09-21
    • Masayuki SHIMADA
    • Masayuki SHIMADA
    • H03F3/68H03F3/16
    • H03F3/68H03F1/56H03F3/189H03F2200/111
    • A power amplifier includes an amplification circuit, an input stage matching circuit, and an output stage matching circuit. The amplification circuit amplifies an input signal in each frequency band by an active element common to the signals in plural types of frequency bans, and outputs the amplified signal. The input stage matching circuit is disposed on an input side of the active element, and performs an impedance-matching between an output impedance of a circuit which supplies the signals of the plural types of frequency bands and an input impedance of the active element. The output stage matching circuit is disposed on an output side of the active element, and performs an impedance-matching between an input impedance of a circuit which receives the signals of the plural types of frequency bands outputted from the active element and an output impedance of the active element.
    • 功率放大器包括放大电路,输入级匹配电路和输出级匹配电路。 放大电路通过多种频率禁令中的信号共用的有源元件放大每个频带中的输入信号,并输出放大的信号。 输入级匹配电路设置在有源元件的输入侧,并且在提供多种类型频带的信号的电路的输出阻抗和有源元件的输入阻抗之间执行阻抗匹配。 输出级匹配电路设置在有源元件的输出侧,并且执行接收从有源元件输出的多种频带的信号的电路的输入阻抗与输出级匹配电路的输出阻抗之间的阻抗匹配 活动元素。