6-elements ladder type piezoelectric filter

Details 6-elements ladder type piezoelectric filter 6-elements ladder type piezoelectric filter

1997-07-24

1999-08-17

Pascal, Robert

Wave transmission lines and networks

Coupling networks

Electromechanical filter

333187, 310368, H03H 958

Patent

active

059399570

ABSTRACT:
A ladder type piezoelectric filter has a circuit configuration such that a group delay time characteristic of the filter can easily be improved. The piezoelectric filter includes six resonators, a pair of series resonators S1 and S2 connected in series between input and output terminals. A pair of parallel resonators P1 and P2 and another pair of parallel resonators P3 and P4 are respectively connected between the connection point of the series resonators S1 and S2 and a grounding terminal and between the connection point of the downstream series resonator S2 and the output terminal and the grounding terminal.

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patent: 5130680 (1992-07-01), Nagai et al.
patent: 5332982 (1994-07-01), Kawakami

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