Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Patent
1991-03-11
1992-10-06
Budd, Mark O.
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
310313B, 310361, 310365, 310366, 310316, 310317, 310326, 310329, 310338, 333151, 333154, H01L 4108
Patent
active
051534762
ABSTRACT:
Biasing electrodes on a piezoelectric acoustic vibrator alter the sensitivity of the acoustic vibrator and can be used to compensate for external stresses applied to the acoustic vibrator. The biasing electrodes and the circuitry providing electric signals to them are separate from the RF circuitry feeding the RF signal electrodes of the acoustic vibrator. Biasing electrodes can be used on bulk acoustic wave devices or surface acoustic wave devices. The biasing electrodes can be energized by a static D.C. voltage source, or can be used in a dynamic biasing arrangement to provide instantaneous compensation for changing environmental conditions.
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Errol P. EerNisse et al., "Variational Method for Modeling Static and Dynamic Stresses in a Resonator Disc with Mounts", 43rd Annual Symposium on Frequency Control, Quartztronics, Inc., IEEE (1989), pp. 377-387.
Anderson William H.
Budd Mark O.
Dougherty Thomas M.
Saunders Raymond M.
The United States of America as represented by the Secretary of
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