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Multi-mode micro-mechanical microphone

A microphone and micro-mechanical technology, applied in transducer circuits, electrostatic transducer microphones, sensors, etc., can solve the problem of non-adjustable sensitivity of micro-mechanical microphones, and achieve the effect of avoiding changes

Active Publication Date: 2014-11-26
ZILLTEK TECH SHANGHAI +1
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a multi-mode micro-mechanical microphone, which is used to solve the problem of non-adjustable sensitivity of the micro-mechanical microphone in the prior art

Method used

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Embodiment Construction

[0026] The implementation of the present invention will be illustrated by specific specific examples below, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0027] see Figure 1 to Figure 3 . It should be noted that the structures, proportions, sizes, etc. shown in the drawings attached to this specification are only used to match the content disclosed in the specification, for those who are familiar with this technology to understand and read, and are not used to limit the implementation of the present invention. Limiting conditions, so there is no technical substantive meaning, any modification of structure, change of proportional relationship or adjustment of size, without affecting the effect and purpose of the present invention, should still fall within the scope of the present invention. The disclosed technical content must be within the scope covered.

[0028] ...

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Abstract

The invention provides a multi-mode micro-mechanical microphone which comprises an acoustoelectric sensor; a mode selector which is connected with an external processing unit and is used for converting mode selection signals output by the processing unit into corresponding gating signals and outputting the gating signals; a controlled amplifier which is connected with the mode selector and is used for determining amplification gain of electrical signals output by the acoustoelectric sensor based on the gating signals provided by the mode selector, amplifying the electrical signals based on the determined amplification gain and outputting the amplified electrical signals; a controlled power source which is connected with the mode selector and is used for determining bias voltage output to the acoustoelectric sensor based on the gating signals provided by the mode selector and outputting the determined bias voltage so as to enable the acoustoelectric sensor to convert acoustical signals into electrical signals based on the determined bias voltage. Through mode selection, applying microphones with different sensitivity to different applications can be realized.

Description

technical field [0001] The invention relates to a micro-mechanical microphone, in particular to a multi-mode micro-mechanical microphone. Background technique [0002] Micromechanical microphone (MEMS microphone) is a microphone designed based on CMOS / MEMS technology, and its consistency is more than 4 times better than that of electret capacitor microphones. Due to its excellent characteristics and extremely small size, micromechanical microphones It is especially suitable for cost-effective microphone array applications, such as mobile phones, notebook computers, tablet computers, recording pens, digital cameras and other electronic products. [0003] At present, in order to allow micromechanical microphones to provide high-quality audio services in corresponding electronic products, designers of micromechanical microphones make different designs for the sensitivity of micromechanical microphones according to the characteristics of the application fields of electronic prod...

Claims

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Application Information

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IPC IPC(8): H04R19/04H04R3/00
Inventor 叶菁华
Owner ZILLTEK TECH SHANGHAI
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