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Invention Publication
CN108400776A 滤波电路、复用器以及模块 有权

滤波电路、复用器以及模块
Abstract:
滤波电路、复用器以及模块。该滤波电路包括：第一元件，该第一元件是串联连接在输入端子与输出端子之间的第一电容器或第一电感器；第二元件，该第二元件在输入端子与输出端子之间并联连接到第一元件，当第一元件是第一电容器时该第二元件是第二电感器，并且当第一元件是第一电感器时该第二元件是第二电容器；第三元件，该第三元件在输入端子与输出端子之间并联连接到第一元件且与第二元件串联连接，当第一元件是第一电容器时该第三元件是第三电感器，并且当第一元件是第一电感器时该第三元件是第三电容器；以及声波谐振器，该声波谐振器具有第一端和第二端，该第一端联接到在第二元件与第三元件之间的第一节点，该第二端联接到接地端子。
Abstract(English):

A filter circuit includes: a first element that is a first capacitor or a first inductor connected in series between input and output terminals; a second element that is connected in parallel to the first element between the input and output terminals, is a second inductor when the first element is the first capacitor, and is a second capacitor when the first element is the first inductor; a third element that is connected in parallel to the first element and in series with the second element between the input and output terminals, is a third inductor when the first element is the first capacitor, and is a third capacitor when the first element is the first inductor; and an acoustic wave resonator having a first end coupled to a first node between the second element and the third element and a second end coupled to a ground terminal.

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