Acoustic wave filter

Details Acoustic wave filter Acoustic wave filter

1985-10-15

1987-10-27

LaRoche, Eugene R.

Wave transmission lines and networks

Coupling networks

Electromechanical filter

310313B, 310313D, H03H 964

Patent

active

047032901

ABSTRACT:
An acoustic wave filter comprising a piezoelectric substrate body upon which at least two digital structures are formed and which comprise input and output transducers and at least one further digital structure and wherein the filter digital structure has a center frequency of f.sub.2 and wherein the pass band of said two digital structures is at least twice as broad banded as said further digital structure and where the center frequencies f.sub.1 and f.sub.2 of the two digital structures are shifted relative to each other and relative to the center frequency f.sub.2 of the further digital structure.

REFERENCES:
patent: 3882433 (1975-05-01), Subramanian
patent: 4075582 (1978-02-01), Walker
patent: 4325037 (1982-04-01), Bulst et al.

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