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    • 8. 发明授权
    • High frequency switching circuit
    • 高频开关电路
    • US5883541A
    • 1999-03-16
    • US811931
    • 1997-03-05
    • Kazuhiro TaharaTatsuya Miya
    • Kazuhiro TaharaTatsuya Miya
    • H03K17/693H03K17/687
    • H03K17/693
    • A high frequency switching circuitry comprising the following elements. At least one input signal terminal is provided into which an input signal is inputted. An output signal terminal is also provided, from which an output signal is outputted. A first resistive switching circuit is connected between the input signal terminal and a first node. The first resistive switching circuit has first and second signal transmission channels having first and second resistances. The second resistance of the second channel is much higher than the first resistance of the first channel. The first resistive switching circuit switches the first and second signal transmission channels. A first switching element is connected between the first node and the output terminal. A second switching element is connected in series between the first node and a ground line. It is important that the second resistance of the second signal transmission channel of the first resistive switching circuit is almost equal to a difference of an ON-resistance of the second switching element from an impedance of a signal source of the high frequency switching circuitry.
    • 一种高频开关电路,包括以下元件。 提供输入信号至少一个输入信号端子。 还提供输出信号端子,从该输出信号端子输出输出信号。 第一电阻开关电路连接在输入信号端和第一节点之间。 第一电阻开关电路具有第一和第二信号传输通道,其具有第一和第二电阻。 第二通道的第二阻力远高于第一通道的第一阻力。 第一电阻式开关电路切换第一和第二信号传输通道。 第一开关元件连接在第一节点和输出端子之间。 第二开关元件串联连接在第一节点和地线之间。 重要的是,第一电阻式开关电路的第二信号传输通道的第二电阻几乎等于第二开关元件的导通电阻与高频开关电路的信号源的阻抗的差。