| 摘要 |
In a branch circuit (100), a first band-pass filter (1) allows a first band signal in an input signal to pass therethrough.
A second band-pass filter (2) allows a second band signal in the input signal to pass therethrough. The first band-pass filter has a pre-resonance (11) circuit, a post-resonance (12) circuit, and a coil (13). The pre-resonance circuit has a coil (111), and a capacitor (112) connected to the coil in series and is connected to an input terminal (14) of the first band-pass filter. The post-resonance circuit (12) has a coil (121), and a capacitor (122) connected to the coil in series, and is connected between the pre-resonance circuit and an output terminal (15) of the first band-pass filter. The coil (13) is connected between an output terminal (113) of the pre-resonance circuit and a ground.
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