Condenser type microphone

A condenser microphone, capacitor technology, applied in electrostatic transducer microphones, electret electrostatic transducers and other directions, can solve problems such as volume reduction, and achieve the effect of reducing adverse effects and improving sensitivity

Inactive Publication Date: 2012-03-28
AAC ACOUSTIC TECH (SHENZHEN) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the reduction in volume causes the influence of external electromagnetic interference to become prominent

Method used

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  • Condenser type microphone
  • Condenser type microphone
  • Condenser type microphone

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Embodiment Construction

[0015] The specific structure of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0016] The capacitive microphone of the present invention is mainly used in mobile phones to receive sound and convert the sound into electrical signals.

[0017] Please refer to figure 1 and figure 2 , the capacitive microphone 10 of the present invention mainly comprises an integrated circuit board 11, a diaphragm 12 arranged opposite to the integrated circuit board 11, a back plate 13 arranged opposite to the diaphragm 12, and the diaphragm 12 is located between the integrated circuit board 11 and the back electrode between plates 13.

[0018] Several through holes 131 are provided on the back plate 13 , and these through holes 131 are used to receive external sound and transmit the external sound to the diaphragm 12 .

[0019] The part of the integrated circuit board 11 facing the diaphragm 12 is provided with a conductive layer 111 ...

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Abstract

The invention relates to a capacitance-type microphone, in particular to a micro electro-mechanical system (short for MEMS) microphone, comprising a back-electrode plate, a diaphragm and an integrated circuit board. A first capacitance is formed between the back-electrode plate and the diaphragm. A second capacitance is formed between the diaphragm and the integrated circuit board. The first capacitance and the second capacitance are electrically connected to the integrated circuit board through difference. The noise signal can be filtered and the sensitivity of the microphone can be improvedthrough the difference connection of two capacitances.

Description

【Technical field】 [0001] The invention relates to a condenser microphone, in particular to a micro-electromechanical system microphone. 【Background technique】 [0002] With the development of wireless communication, there are more and more mobile phone users around the world. The requirements of users for mobile phones are not only satisfied with calls, but also to be able to provide high-quality call effects. Especially the current development of mobile multimedia technology, the mobile phone Call quality is more important. The microphone of a mobile phone is used as a voice pick-up device for the mobile phone, and its design directly affects the call quality. [0003] Micro-Electro-Mechanical-System Microphone is currently the most widely used microphone with better performance, and its packaging volume is smaller than that of traditional electret microphones. However, the reduction in volume causes the influence of external electromagnetic interference to become prominen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04R19/01H04R19/04
Inventor 潘政民王云龙孟珍奎
Owner AAC ACOUSTIC TECH (SHENZHEN) CO LTD
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