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Circuit and method for testing output power of mobile phone loudspeaker

A technology for output power and testing mobile phones, applied in the direction of electrical components, etc., can solve the problems affecting the reputation of manufacturers and the effect of use, and achieve the effect of improving accuracy and reducing components

Inactive Publication Date: 2016-08-24
SHANGHAI DROI TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In actual production, the output frequency of the mobile phone speaker often affects its own use effect. If the output frequency cannot reach the established standard, then the produced mobile phone will become defective because the sound produced by itself cannot meet the needs of customers. products, which in turn affects the reputation of the entire manufacturer

Method used

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  • Circuit and method for testing output power of mobile phone loudspeaker
  • Circuit and method for testing output power of mobile phone loudspeaker

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Embodiment Construction

[0026] Specific embodiments of the invention will be described in detail below in conjunction with the accompanying drawings.

[0027] A method for testing the output power of a speaker of a mobile phone, the specific steps of which are as follows:

[0028] This test method uses a low-pass filter and a dual-channel oscilloscope XS.

[0029] The low-pass filter adopts an RC circuit, and what the low-pass filter adopts is that the resistance in the RC circuit needs to be 100 ohms, and the capacitor is selected as 47nF.

[0030] Step 1, connecting the input end of the low-pass filter to the positive pole and the negative pole of the tested mobile phone speaker pad respectively, and connecting the output end of the low-pass filter to the oscilloscope XS;

[0031] Step 2, the output terminal of the oscilloscope XS is connected with a signal collector;

[0032] Step 3, the signal collector includes a digital-to-analog conversion module, the output signal of the oscilloscope XS is ...

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Abstract

The invention provides a circuit and method for testing the output power of a mobile phone loudspeaker. The method comprises the steps: 1) an input end of a low pass filter is connected to a positive pole and a negative pole of a mobile phone loudspeaker pad to be tested, and an output end of the low pass filter is connected to an oscilloscope; 2) an output end of the oscilloscope is connected to a signal collector; and 3) the signal collector includes a digital-to-analog conversion module, and an output signal of the oscilloscope is converted into an analog signal through the digital-to-analog conversion module, and is transmitted to a singlechip, and the value of the output power P of the mobile phone loudspeaker is obtained through calculation. The circuit and method for testing the output power of a mobile phone loudspeaker can realize detection of the output power of a loudspeaker through the low pass filter, the oscilloscope and the method for calculating the power, and can avoid the interference factors of other external signals because the used spliced modules are concise.

Description

technical field [0001] The invention belongs to the field of frequency testing, and in particular relates to a circuit and a method for testing the output power of a speaker of a mobile phone. Background technique [0002] In actual production, the output frequency of the mobile phone speaker often affects its own use effect. If the output frequency cannot reach the established standard, then the produced mobile phone will become defective because the sound produced by itself cannot meet the needs of customers. products, which in turn affects the reputation of the entire manufacturer. Then it is necessary to test the output power of the mobile phone speaker before leaving the factory, and in order to obtain a stable output power, a 1Khz test sound source is generally used. Contents of the invention [0003] The problem to be solved by the invention is to detect the output power of the speaker of the mobile phone at the fastest speed by using a simple method of overlapping...

Claims

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Application Information

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IPC IPC(8): H04R29/00
CPCH04R29/001
Inventor 叶为勇
Owner SHANGHAI DROI TECH CO LTD
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