High output audible alarm device utilizing a piezoelectric...

Details High output audible alarm device utilizing a piezoelectric... High output audible alarm device utilizing a piezoelectric...

G - Physics

10

K

84/61

G10K 9/12 (2006.01) B06B 1/02 (2006.01) G08B 3/10 (2006.01)

Patent

CA 1082962

HIGH OUTPUT AUDIBLE ALARM DEVICE UTILIZING A PIEZOELECTRIC TRANSDUCER AND VOLTAGE DOUBLING MEANS Abstract of Disclosure A high output audible alarm having a power supply, a pulsator responsive to the power supply, an amplifier coupled to the pulsator for oscillating the power supply input voltage, and a piezoelectric transducer responsive to the amplifier also includes a circuit responsive to a plurality of electrical pulses of opposite polarities for doubling the voltage of the power supply to supply a drive voltage to the piezo- electric transducer which is double the power supply input voltage.

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