Ladder filter having reduced size

Details Ladder filter having reduced size Ladder filter having reduced size

1995-02-24

1996-10-15

Lee, Benny

Wave transmission lines and networks

Coupling networks

Electromechanical filter

310348, H03H 958

Patent

active

055658245

ABSTRACT:
A ladder filter includes two piezoelectric resonators which operate in a stretch vibration mode and stacked on top of each other with a grounding terminal located therebetween. Two piezoelectric resonators which operate in a length vibrating mode are provided at both sides of the piezoelectric resonators which operate in a stretch vibration mode.

REFERENCES:
patent: 4864259 (1989-09-01), Takamoro et al.
patent: 5260675 (1993-11-01), Ogawa et al.
patent: 5274529 (1993-12-01), Mura et al.

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