Excitation circuit for piezo-electric sound generators

Details Excitation circuit for piezo-electric sound generators Excitation circuit for piezo-electric sound generators

1984-06-19

1988-04-05

Caldwell, Sr., John W.

Communications: electrical

Audible indication

Ultrasonic pest control

331158, G08B 300

Patent

active

047361921

ABSTRACT:
An excitation circuit wherein the energy of a charged coil is discharged via a sound generator. A coil and a capacitance of the sound generator are tuned to one another such that a corresponding oscillatory frequency is identical to a predetermined resonant frequency of the sound generator.

REFERENCES:
patent: 3989963 (1975-05-01), Giaccardi
patent: 4010447 (1977-03-01), Podowski
patent: 4164735 (1979-08-01), Salem
"Radio Engineers Handbook" by Terman, pp. 494-497, McGraw-Hill, copyright 1943.

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