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发明公开
CN106100606A 频率选择电路 有权

频率选择电路
摘要：
本申请提供了一种频率选择电路。该频率选择电路包括：第一晶体管，包括第一端、第二端和控制端，在该第一晶体管的第一端处接收输入电流；阻抗元件，耦接在该第一晶体管的第一端和控制端之间；第一电容元件，耦接至该第一晶体管的第一端；第二电容元件，耦接至该第一晶体管的控制端；以及第二晶体管，包括第一端、第二端和控制端，该第二晶体管的控制端耦接至该第一晶体管的控制端，该第二晶体管的第一端输出输出电流。本申请提供的频率选择电路可以在没有额外电流消耗的情况下实现高Q滤波。
摘要（英）：

The invention discloses a frequency selective circuit. The frequency selective circuit includes a first transistor, an impedance element, a first capacitive element, a second capacitive element, and a second transistor. The first transistor includes a first terminal, a second terminal and a control terminal. The impedance element is coupled between the first terminal and the control terminal of the first transistor. The first capacitive element is coupled to the first terminal of the first transistor. The second capacitive element is coupled to the control terminal of the first transistor. The second transistor includes a first terminal, a second terminal and a control terminal, wherein the control terminal of the second transistor is coupled to the control terminal of the first transistor, and the first terminal of the second transistr outputs an output current. According to the invention, the frequency selective circuit fulfills high Q filtering in the absence of extra current consumption.

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