IIDT type surface acoustic wave device

Details IIDT type surface acoustic wave device IIDT type surface acoustic wave device

1995-10-10

1996-10-22

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310313D, H01L 4108

Patent

active

055680020

ABSTRACT:
An IIDT type surface acoustic wave filter (41) comprising a piezoelectric substrate and at least three IDTs (44 to 46) which are arranged on a surface of the piezoelectric substrate along the direction of surface wave propagation, the IDT (44) being inverted in phase with respect to the other IDT (46) while these IDTs (44) and (46) are connected in series to each other through the ground potential, thereby balancing inputs or outputs.

REFERENCES:
patent: 3872410 (1975-03-01), Zucker
patent: 4044321 (1977-08-01), Vasile
patent: 4468642 (1984-08-01), Hikita
patent: 4649357 (1987-03-01), Nagai et al.
patent: 5010269 (1991-04-01), Hikita et al.
patent: 5194830 (1993-03-01), Fleischmann
patent: 5300902 (1994-04-01), Satoh et al.

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