Surface acoustic wave device

Details Surface acoustic wave device Surface acoustic wave device

1985-10-09

1987-09-29

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310313D, 333150, 333152, 333193, 333195, H01L 4108

Patent

active

046971157

ABSTRACT:
A surface acoustic wave device includes a semiconductor substrate, a piezoelectric film disposed on the semiconductor substrate, at least one pair of comb-shaped electrodes constituting an input transducer, and an output transducer a plurality of surface acoustic wave filters having different bands, which include a plurality of metal electrodes, so disposed that each of them is located between the input and output comb-shaped electrodes of each of the surface acoustic wave filters, a bias voltage applying arrangement for applying bias voltages to each of the metal electrodes; and a bias voltage regulating arrangement for regulating the bias voltages.

REFERENCES:
patent: 4028649 (1977-06-01), Komatsu et al.
patent: 4233573 (1980-11-01), Grudkowski
patent: 4401956 (1983-08-01), Joshi
patent: 4420730 (1983-12-01), Wakatsuki et al.
patent: 4426732 (1984-01-01), Mori
patent: 4451805 (1984-05-01), Ono et al.

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