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发明公开
CN105096930A 蜂鸣器电路 无效 - 撤回

蜂鸣器电路
摘要：
一种蜂鸣器电路，连接一驱动电路，所述蜂鸣器电路包括一蜂鸣器、一恒流单元及一控制单元。所述控制单元连接于所述蜂鸣器与所述恒流单元之间。当所述蜂鸣器的电源引脚接收到来自所述驱动电路的驱动信号时，所述控制单元控制所述恒流单元工作。本发明蜂鸣器电路利用所述控制单元控制所述恒流单元工作，以恒定流过所述蜂鸣器的电流大小，从而稳定所述蜂鸣器工作时的声音。
摘要（英）：

The invention provides a buzzer circuit which is connected with a drive circuit. The buzzer circuit comprises a buzzer, a constant current unit and a control unit. The control unit is connected between the buzzer and the constant current unit. When the power pin of the buzzer receives a drive signal from the drive circuit, the control unit controls the constant current unit to work. According to the buzzer circuit, the control unit is utilized to control the constant current unit to work so that the size of current flowing through the buzzer is enabled to be constant, and thus sound of the buzzer in working can be stabilized.

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