Surface wave frequency selective device

Details Surface wave frequency selective device Surface wave frequency selective device

1974-08-12

1977-02-01

Griffin, Robert L.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

333 72, H04N 560

Patent

active

040062902

ABSTRACT:
A surface wave frequency selective device including a single interdigital transducer disposed on a piezoelectric substrate for attenuating signals of a particular frequency or range of frequencies is shown. An intermediate frequency circuit including the surface wave frequency selective device and a frequency selective system including the surface wave frequency selective device as well as a surface wave filter disposed on the same substrate are also shown.

REFERENCES:
patent: 3582540 (1971-06-01), Adler et al.
patent: 3582837 (1971-06-01), DeVries
patent: 3582838 (1971-06-01), DeVries
patent: 3675163 (1972-07-01), Hartmann
patent: 3688223 (1972-08-01), Pratt et al.
patent: 3714594 (1973-01-01), Adler et al.
patent: 3787612 (1974-01-01), DeVries et al.
patent: 3846722 (1974-11-01), DEKlerk
patent: 3868608 (1975-02-01), Williams
patent: 3872410 (1975-03-01), Zucker
patent: 3882433 (1975-05-01), Subramanian

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