Device for preventing audio device interference

An audio and device technology, which is applied in the field of devices affected by the performance of radio frequency devices, can solve problems such as affecting audio effects, and achieve the effects of improving antenna performance, reducing complexity, and reducing interference sources

Inactive Publication Date: 2008-08-06
HUIZHOU SPEED WIRELESS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above scheme has estimated the inductance value in a wide range, or does not consider the influence of the inductance value at all. With the improvement of the quality requirements of mobile phone audio signals in recent years, the inductance value that is too high or too low will affect the frequency band of the audio signal. The current has an impact, which in turn affects the effect of the audio

Method used

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  • Device for preventing audio device interference

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Embodiment Construction

[0017] In order to facilitate the understanding of those skilled in the art, the structural principle of the present invention will be further described in detail below in conjunction with specific embodiments and accompanying drawings:

[0018] Such as figure 1 Shown is the connection diagram of the application structure of the device of the present invention on the mobile phone. On the circuit board PCB 1 of the mobile phone, a mobile phone antenna 2, an audio component 3, an audio circuit module 4, and other circuit modules 5 are arranged. Inductors 6-1 and 6-2 are respectively connected in series on the pins 3-1 and 3-2, and the inductors 6-1 and 6-2 are connected to the pins 4-1 and 4-2 of the audio circuit module. The resistance values ​​of -1 and 6-2 are between 40 and 120nH, and the surroundings of the inductors 6-1 and 6-2 and the upper and lower copper clad grounds are cleaned, and the clearance area is 1 to 3mm around the inductors. If there is no clearance treatme...

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Abstract

The invention discloses a device for preventing interference of an audio device, comprising an antenna and a voice circuit which are arranged on a printed circuit board PCB, wherein, the voice circuit consists of an audio processing IC or an audio module and an audio element; an inductance is connected in series between the audio processing IC or the audio module and the audio element and has an inductance size of 40 to 120 nH. The device for preventing interference of the audio device can reduce the affection of interference of an audio circuit and effectively raise the efficiency of the antenna under the condition that internal circuit structure and contour design of the prior device are not changed; moreover, the design flow method of a mobile telephone is improved; design processes of the mobile telephone and a mobile antenna are specified; the design difficulty is simplified. Furthermore, the device is characterized in convenient realization and concise structure.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a device for preventing an audio device from affecting the performance of a radio frequency device of a communication terminal. Background technique [0002] At present, the antenna of the mobile phone is represented by the built-in antenna of the mobile phone, and it is recognized that there are some problems in the research and development process. As the peripherals and interiors of mobile phones become more and more complex, and the functions of mobile phones increase, the electromagnetic environment inside the mobile phone becomes worse and it is difficult to measure accurately, which makes the research and development process of mobile phone antennas difficult, the efficiency of antennas varies greatly, and the signal quality of mobile phone products is difficult to guarantee. Audio devices such as speakers and mics are important interference sources for the deteriora...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/38H05K1/02H04M1/02
Inventor 朱明
Owner HUIZHOU SPEED WIRELESS TECH CO LTD
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