Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Patent
1989-11-17
1993-05-25
Budd, Mark O.
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
310313R, 310313D, H01L 4108
Patent
active
052143384
ABSTRACT:
A novel surface acoustic wave (SAW) element for use in a stabilized oscillator circuit capable of coupling directly to external circuitry includes a pair of opposed transducers formed on a surface of a piezoelectric crystal for launching surface acoustic waves into a resonant cavity formed by opposed reflectors on the crystal surface. The element is characterized by a supplemental transducer coupled to the cavity for directly providing external circuitry with signals corresponding to the resonant surface acoustic waves.
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patent: 4016514 (1977-04-01), Reeder et al.
patent: 4041419 (1977-08-01), Desormiere et al.
patent: 4191933 (1980-03-01), Montress et al.
patent: 4442574 (1984-04-01), Wabuga et al.
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patent: 4628222 (1986-12-01), Lewis
patent: 4745378 (1988-05-01), Niitsuma et al.
High Q, Temperature Stable ZnO-on-Silicon SAW Resonators, by S. J. Martin et al, 1980 Ultrasonics Symposium, pp. 113-117.
Budd Mark O.
United Technologies Corporation
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