Two-end micro-electro-mechanical system (MEMS) microphone

A microphone and ground terminal technology, applied in the field of microphones, can solve problems such as inconvenient use, inconvenient adjustment of current and sensitivity, etc., and achieve the effects of convenient adjustment, increased integration, and convenient use

Active Publication Date: 2013-02-13
SHANDONG GETTOP ACOUSTIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a MEMS microphone with two ends for the above deficiencies, which overcomes the defects of inconvenient use, inconvenient adjustment of current and sensitivity in the prior art, and adopts the microphone of the present invention, which has the advantages of convenient use, current And the advantages of convenient sensitivity adjustment

Method used

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  • Two-end micro-electro-mechanical system (MEMS) microphone
  • Two-end micro-electro-mechanical system (MEMS) microphone
  • Two-end micro-electro-mechanical system (MEMS) microphone

Examples

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Embodiment Construction

[0019] Examples such as image 3 As shown, a two-terminal MEMS microphone includes an electrically connected micro-capacitance sensor MEMS, a bias voltage supply circuit VBAIS and an application-specific integrated circuit ASIC. The micro-capacitance sensor MEMS is used to convert external sound signals into alternating current signals, and the bias The voltage supply circuit VBAIS is used to provide the reference voltage for MEMS, and the ASIC is used to amplify the AC signal input by the microcapacitance sensor MEMS;

[0020] The voltage input terminal of the microcapacitance sensor MEMS is connected with the voltage output terminal of the bias voltage supply circuit VBAIS, the voltage input terminal of the bias voltage supply circuit VBAIS is grounded through the capacitor C1, the voltage input terminal of the bias voltage supply circuit VBAIS is connected with the ASIC The voltage input terminal of ASIC is connected to the power supply and signal output terminal VDD&VOUT t...

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Abstract

The invention relates to a two-end micro-electro-mechanical system (MEMS) microphone which comprises a micro- capacitance sensor MEMS, a bias voltage supply circuit VBAIS and a dedicated integrated circuit ASIC which are electrically connected. A voltage input end of the bias voltage supply circuit VBAIS is electrically connected with a power supply and signal output end VDD & VOUT. A signal output end VOUT and a power supply end VDD of a three-end MEMS microphone in the prior art are combined into one port so that an original three-end component is converted into a two-end component, and therefore the MEMS microphone is improved is improved in integration level and is convenient to use. An RC circuit is connected between a signal output end of the dedicated integrated circuit ASIC and a grounding end of the dedicated integrated circuit ASIC and can be used to adjust static working current and sensitivity so that control of static current and sensitivity of the MEMS microphone can be achieved through reasonable selection of RDC and RAC values in the RC circuit, and therefore adjustments are convenient.

Description

technical field [0001] The invention relates to a microphone, in particular to a two-end MEMS microphone with adjustable current and sensitivity, belonging to the technical field of microphones. Background technique [0002] A microphone is a microphone, which is an energy conversion device that converts sound signals into electrical signals, also known as microphones, microphones or microphones. It is classified into dynamic, capacitive, electret and emerging MEMS microphones, as well as liquid microphones. and laser microphones. [0003] At present, MEMS microphones on the market are three-terminal devices, and the three terminals are the power supply terminal VDD, the ground terminal GND and the signal output terminal VOUT respectively, such as figure 1 and figure 2 As shown, the three-terminal MEMS microphone includes an electrically connected microcapacitance sensor MEMS, a bias voltage supply circuit VBAIS and an application-specific integrated circuit ASIC. The mic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04R19/04
Inventor 田达亨
Owner SHANDONG GETTOP ACOUSTIC
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