Filter device having a first inductance in a chip substrate and a second inductance in a mounting substrate
Abstract:
A filter device with a ladder circuit configuration includes series arm resonators and parallel arm resonators, a filter component mounted on a mounting substrate and including a chip substrate and an elastic wave filter chip, a circuit configuration in which a plurality of series arm resonators and parallel arm resonators are defined by the elastic wave filter chip, and inductances are connected between ground-potential-side end portions of the plurality of parallel arm resonators and a ground potential, and in which at least one of the plurality of inductances is provided in the chip substrate and a remaining at least one inductance is provided in the mounting substrate.
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