Patent ID: 7999634

Claim:
A layered low-pass filter comprising: a layered substrate including a plurality of dielectric layers stacked; an input terminal, an output terminal and a grounding terminal each disposed on a periphery of the layered substrate; a first inductor and a second inductor each formed using at least one conductor layer provided within the layered substrate, the first and second inductors being connected in series to each other and, in terms of circuit configuration, located between the input terminal and the output terminal; first to fifth capacitors provided within the layered substrate; a grounding conductor layer provided within the layered substrate; and a conducting portion provided within the layered substrate and connecting the grounding conductor layer to the grounding terminal, wherein, in terms of circuit configuration, the first inductor is located closer to the input terminal than is the second inductor; each of the first and second inductors has an input for receiving signals and an output for outputting signals; the output of the first inductor is connected to the input of the second inductor; the first capacitor is connected in parallel to the first inductor; the second capacitor is connected in parallel to the second inductor; the third capacitor connects the grounding conductor layer to the output of the first inductor and to the input of the second inductor; the fourth capacitor connects the grounding conductor layer to the input of the first inductor; the fifth capacitor connects the grounding conductor layer to the output of the second inductor; and the conducting portion connects the grounding conductor layer to the grounding terminal via a connecting pathway that is longer than a shortest distance between the grounding conductor layer and the grounding terminal.