The sound bai principle of the buzzer is composed of a vibration device and a harmonious du vibration device, and the buzzer is divided into passive and derived excitation types. The sound principle of the dao buzzer is as follows:
1. The working sound principle of the passive other excited buzzer is: the square wave signal input resonant device is converted into the sound signal output.
2, the working sound principle from the excited buzzer is: the DC power input through the amplifying sampling circuit of the oscillation system generates a sound signal under the action of the resonant device.
The main difference between active buzzer and passive buzzer is that the two have different requirements for the input signal, and the ideal signal for active buzzer work is direct current, generally labeled VDD, VDC, etc. Because there is a simple oscillation circuit inside the buzzer, the constant direct current can be converted into a pulse signal of a certain frequency, resulting in magnetic field alternating, driving the molybdenum sheet vibration to emit sound.
