A buzzer and circuit technology, applied to instruments, sound-generating devices, etc., can solve problems such as instability
Inactive Publication Date: 2016-05-18
HONG FU JIN PRECISION IND WUHAN CO LTD +1
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AI-Extracted Technical Summary
Problems solved by technology
A thumper circuit is connected with a drive circuit and comprises a thumper and a control unit. The control unit comprises an electronic switch, a first resistor, a second resistor and a constant voltage element. A control end of the electronic switch is connected with a power supply pin of the thumper through the first resistor, and is also grounded through the constant voltage element. A first end of the electronic switch is connected with a grounding pin of the thumper. A second end of the electronic switch is grounded through the second resistor. When the thumper receives a high-level driving signal, the electronic switch is closed, and the voltage between the control end and the second end of the electronic switch is constant, so as to cooperate with the constant voltage element to provide a constant voltage for two ends of the second resistor, and the grounding pin of the thumper is grounded successively through the electronic switch and the second resistor. According to the thumper circuit of the present invention, the voltage of the second resistor is constant, so that the current flowing through the thumper is constant, thereby stabilizing the sound of the thumper during operation.
Sound producing devices
Power flowConstant voltage +6
- Experimental program(1)
Description & Claims & Application Information
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