Filter using piezoelectric resonator

Details Filter using piezoelectric resonator Filter using piezoelectric resonator

2006-11-21

2006-11-21

Takaoka, Dean (Department: 2817)

Wave transmission lines and networks

Plural channel systems

Having branched circuits

C333S187000, C333S193000

Reexamination Certificate

active

07138888

ABSTRACT:
A series piezoelectric resonator is connected in series between an input terminal and an output terminal. A first electrode of a first parallel piezoelectric resonator is connected to a connection point between the input terminal and the series piezoelectric resonator, and a second electrode of the first parallel piezoelectric resonator is connected to a first terminal of a first inductor. A first electrode of a second parallel piezoelectric resonator is connected to a connection point between the series piezoelectric resonator and the output terminal, and a second electrode of the second parallel piezoelectric resonator is connected to a first terminal of a second inductor. Second terminals of the first and second inductors are grounded. An additional piezoelectric resonator is connected between the second electrode of the first parallel piezoelectric resonator and the second electrode of the second parallel piezoelectric resonator.

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