Filter circuit with series and parallel elements

Wave transmission lines and networks – Coupling networks – Electromechanical filter

Reexamination Certificate

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C333S193000, C333S186000

Reexamination Certificate

active

07061345

ABSTRACT:
Filter circuitry is provided with a series element and a parallel element. The filter circuitry transmits signals that fall within a certain passband and attenuates signals that don't fall within the certain passband. The series element is comprised of a resonance element having antiresonance characteristics, and the parallel element is comprised of a series circuit including an inductor and a capacitor.

REFERENCES:
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Japan Society for the Promotion of Science 150thCommittee on Acoustic Wave Device Technology, Ohmsha Co., Tokyo, Nov. 30, 1991, pp. 217-227.
Morio Onoe et al., Ohmsha Co., Tokyo, Sep. 20, 1982, pp. 175-188.
Yasuharu Suematsu, Kyoritsu Shuppan Co., Ltd., Tokyo, Oct. 5, 1973, pp. 206-207.

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