ELECTRONIC DEVICE FOR GENERATION OF AN AUDIBLE ALARM OR MUSIC

摘要

The electronic device is arranged for generation of an audible alarm or music. It includes a coil or inductor and a buzzer provided with a capacitor connected in series with the coil. When the electronic device is actuated, the buzzer generates the audible alarm or music. The electronic device further includes, in a feedback loop, a derivative circuit connected to a connection node between the coil and the capacitor, to produce a derivative of the signal from the capacitor, and a comparator for comparing a derivative signal from the derivative circuit with a reference voltage. The comparator supplies an output signal to the coil to amplify the signal across the capacitor, so that the buzzer generates at least one audible alarm.

主权项

1. An electronic device for generation of an audible alarm or music, the electronic device including at least one coil or inductor and a buzzer, which includes at least one capacitor connected in series with the coil, for generation of an audible alarm or music when the electronic device is actuated,
wherein the electronic device includes in a feedback loop, a derivative circuit connected to a connection node between the coil and the capacitor of the buzzer, to produce a derivative of the signal from the capacitor, and a comparator for comparing a derivative signal of the derivative circuit with a reference voltage, the comparator supplying an output signal to the coil to amplify the signal across the capacitor, in order to generate at least one audible alarm.