Buzzer driving circuit and calculator circuit with same

A driving circuit and buzzer technology, applied in computing, computers, digital computer parts, etc., can solve the problems of increasing manufacturing steps and production costs, and achieve the effects of reducing energy consumption, saving costs, and reducing requirements

Active Publication Date: 2012-03-14
CRM ICBG (WUXI) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, an additional coupling capacitor must be added for each driving circuit in use, increasing manufacturing steps and production costs

Method used

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  • Buzzer driving circuit and calculator circuit with same
  • Buzzer driving circuit and calculator circuit with same
  • Buzzer driving circuit and calculator circuit with same

Examples

Experimental program
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Embodiment Construction

[0028] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0029] image 3 A structural block diagram of an embodiment of the key tone calculator circuit provided by the present invention. From image 3 It can be seen that the key tone calculator circuit 300 provided by the present invention includes the following parts:

[0030] 1. Power-on reset unit 310: used to generate a power-on reset signal, so that the system executes a power-on reset initialization process. In the figure, VDD is the power supply voltage and GND is the ground.

[0031] 2. Oscillator 320: a built-in RC oscillator is used to generate an oscillation clock for the system clock module 330 to generate various clock signals required by the system.

[0032] 3. System clock module 330: According to the oscillation clock input by the oscillator 320, var...

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PUM

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Abstract

The invention provides a buzzer driving circuit which comprises an output unit. The output unit comprises a first key sound pin and a second key sound pin and is used for outputting a driving signal to a buzzer. The first key sound pin and the second key sound pin output opposite square waves when the buzzer works and output the same level when the buzzer is idle. The invention also provides a calculator circuit. The buzzer driving circuit provided by the invention is adopted in the calculator circuit. When the buzzer driving circuit and the calculator circuit with the buzzer driving circuit,which are provided by the invention, are used for the buzzer with low DC (direct current) impedance, the phenomenon of electric leakage which is commonly generated when the buzzer is idle cannot be generated.

Description

technical field [0001] The invention relates to the technical field of buzzer driving circuits, in particular to a driving circuit of a piezoelectric buzzer and a calculator circuit with the driving circuit. Background technique [0002] Among portable products, calculators are the most common one. From the perspective of pronunciation, it can be divided into non-ring calculators, key tone calculators, and language calculators. Among them, the key tone calculator generally sounds by driving a piezoelectric buzzer. The piezoelectric buzzer makes a sound by vibrating the metal sheet through the piezoelectric effect of the ceramic sheet. Piezoelectric buzzers generally paste piezoelectric ceramic sheets after high-voltage extreme pressure on vibrating metal sheets. When an AC voltage is applied, the piezoelectric ceramic sheet is mechanically deformed, stretched and contracted due to the piezoelectric effect, and this characteristic is used to make the metal sheet vibrate an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10K9/12G06F15/02
Inventor 陈长华杨桂萍赵海薛中耿玲陆健
Owner CRM ICBG (WUXI) CO LTD
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