Ladder-type filter, branching filter, and communication device

Details Ladder-type filter, branching filter, and communication device Ladder-type filter, branching filter, and communication device

2005-06-21

2005-06-21

Summons, Barbara (Department: 2817)

Wave transmission lines and networks

Plural channel systems

Having branched circuits

C333S189000, C333S193000, C333S195000

Reexamination Certificate

active

06909338

ABSTRACT:
In a ladder type filter, a first inductor is connected in series with a parallel resonator. A second inductor is connected in parallel to a series resonator. The resonant point of the parallel resonator having the first inductor connected in series and the anti-resonant point of the series resonator developed on the lower frequency side of the resonant point of the series resonator, caused by the second inductor connected in parallel, substantially coincide with each other.

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