Drive circuit of piezoelectric buzzing piece

The improved piezoelectric buzzer reed driving circuit is characterized by that it includes an oscillating circuit, a piezoelectric buzzer reed connected with output end of the oscillating circuit and a feedback circuit connected between the piezoelectric buzzer reed and input end of the oscillating circuit. Said described driving circuit can utilize the feedback circuit when the piezoelectric buzzer reed is in highest voltage to make the oscillating circuit implement state conversion, and its frequency can make the piezoelectric buzzer reed obtain optimum resonance point. Its repeated operation can greatly raise the sound pressure of the buzzer, make it optain optimum resonance point to raise its working efficiency.