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Fully-integrated single-coil electromagnetic buzzer driving circuit

A drive circuit, electromagnetic technology, applied in the direction of instruments, sounding equipment, etc., can solve the problems of low degree of automation, reduced economic benefits, labor-intensive, etc., and achieve the effects of improving production efficiency, simplifying structure, and low-cost performance.

Pending Publication Date: 2015-11-11
常州东村电子有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with the increase in labor costs and the miniaturization of buzzer products required by complete machine manufacturers in recent years, the existing self-excited active electromagnetic buzzer has a relatively complex structure, low automation, labor-intensive, and economic benefits. Declining year by year, this can no longer meet the needs of industry development

Method used

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  • Fully-integrated single-coil electromagnetic buzzer driving circuit
  • Fully-integrated single-coil electromagnetic buzzer driving circuit
  • Fully-integrated single-coil electromagnetic buzzer driving circuit

Examples

Experimental program
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Effect test

Embodiment 1

[0026] Such as figure 1 , 3 , shown in 6, a fully integrated single-wire-wrapped electromagnetic buzzer drive circuit, including a digitally corrected RC oscillator 1, an eight-stage frequency divider 2, an output drive circuit 3, and a rectifier circuit 4, each part is connected in sequence; It also includes three pins, which are respectively a power supply positive pole pin, a power supply negative pole pin and an output pin; the power supply positive pole pin is connected to the output terminal of the rectifier circuit 4; the output pin is connected to the output drive circuit 3 connection; the rectifier circuit 4 includes an external capacitor, one end of the capacitor is connected to the positive pin of the power supply, and the other end is connected to the negative pin of the power supply.

[0027] The drive circuit can support ultra-small SMT patch SOT23-3 package, and the three pins are VC, GND and OUT respectively. (Such as Figure 4 shown)

[0028] The digital c...

Embodiment 2

[0034] Such as figure 2 , 3 , shown in 7, a fully integrated single-wire package electromagnetic buzzer drive circuit, including a digitally corrected RC oscillator 1, an eight-stage frequency divider 2, an output drive circuit 3, and a rectifier circuit 4, each part is connected in sequence; It also includes three pins, which are respectively a power supply positive pole pin, a power supply negative pole pin and an output pin; the power supply positive pole pin is connected to the output terminal of the rectifier circuit 4; the output pin is connected to the output drive circuit 3 connection; the rectifier circuit 4 includes an external capacitor, one end of the capacitor is connected to the positive pin of the power supply, and the other end is connected to the negative pin of the power supply.

[0035] Also includes an enabling control circuit 5, which is connected to the digitally corrected RC oscillator 1, and the enabling circuit supports the enabling pin control funct...

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PUM

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Abstract

The present invention relates to a fully-integrated single-coil electromagnetic buzzer driving circuit. The fully-integrated single-coil electromagnetic buzzer driving circuit comprises a digital correction RC oscillator, an eight-stage frequency divider, an output driving circuit and a rectifying circuit which are connected with one another sequentially; the fully-integrated single-coil electromagnetic buzzer driving circuit further comprises three pins, namely, a power source positive pole pin, a power source negative pole pin and an output pin, wherein the power source positive pole pin is connected with the output end of the rectifying circuit, and the output pin is connected with the output driving circuit; the rectifying circuit comprises an external-connection capacitor; one end of the capacitor is connected with the power source positive pole pin; and the other end of the capacitor is connected with the power source negative pole pin. The fully-integrated single-coil electromagnetic buzzer driving circuit is very simple in use. The exterior of the circuit is provided with the three pins, and therefore, it only needs to select output frequency of the driving circuit to be matched with the resonant frequency of a single-coil electromagnetic buzzer, so that the sound emission of the buzzer can be optimal. The circuit supports an enabling pin control function, and an enabling end can be controlled through an I / O interface of a single-chip microcomputer to make the buzzer to emit sound or turned off, and the turned-off buzzer can be in a static low-power consumption state.

Description

technical field [0001] The invention relates to the technical field of single-wire-wrapped electromagnetic buzzers, and specifically discloses a fully integrated single-wire-wrapped electromagnetic buzzer drive circuit. Background technique [0002] According to the different ways of generating drive signals, electromagnetic buzzers are divided into two types: self-excited active and other excited passive. Its excited electromagnetic buzzer is composed of a single set of coils, and its structure is relatively simple. It generates a square wave signal that is close to the natural resonance frequency of the buzzer through an external drive circuit, and excites the buzzer diaphragm to vibrate and make a sound. , and make it work in a better resonance state; while the self-excited buzzer is composed of two sets of coils and discrete components that oscillate and vibrate. Through sampling amplification and feedback, the system circuit forms a frequency that is the same as the nat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10K9/13
Inventor 周鸣放方立东
Owner 常州东村电子有限公司