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Microphone configuration method

A configuration method and microphone technology, applied in the direction of electrical components, etc., can solve problems such as low yield

Active Publication Date: 2015-11-25
SHANDONG GETTOP ACOUSTIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, the sensitivity of MEMS sensors with different monomers of the same model is not consistent with the linear or nonlinear variation relationship of the bias voltage of the supporting circuit chip. Therefore, if a fixed linear or nonlinear relationship is used to directly calculate the working sensitivity The way of bias voltage to configure different microphones will also lead to low yield

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Embodiment Construction

[0021] The present invention is described below based on examples, but the present invention is not limited to these examples. In the following detailed description of the invention, some specific details are set forth in detail. The present invention can be fully understood by those skilled in the art without the description of these detailed parts. In order to avoid obscuring the essence of the present invention, well-known methods, procedures, and flow charts are not described in detail. Additionally, the drawings are not necessarily drawn to scale.

[0022] The flow charts and block diagrams in the accompanying drawings illustrate the possible system framework, functions and operations of the systems, methods, and devices of the embodiments of the present invention, and the blocks on the flow charts and block diagrams can represent a module, program segment, or just a segment Code, said modules, program segments and codes are all executable instructions for implementing ...

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Abstract

The invention provides a microphone configuration method, for setting offset voltage of a work point of a microphone so as to obtain expected work sensitivity. The method comprises the following steps: carrying out measurement for multiple times so as to obtain sensitivity under different offset voltages; obtaining a response curve according to a relation between the offset voltage and the sensitivity; and calculating the offset voltage of the work point by use of the response curve. In a measuring process, the offset voltage of measurement this time is set according to the sensitivity of measurement of last time. For different single microphones, the method employs measurement of multiple times to fit a corresponding linear or nonlinear relation so as to improve the arrangement accuracy of the work point of the microphone.

Description

technical field [0001] The invention relates to a sound collection device, in particular to a microphone configuration method. Background technique [0002] The sensitivity of a microphone is the ratio of the analog output voltage or digital output value to the input sound pressure. Sensitivity is a key indicator to measure the quality of the microphone, and the sensitivity of the microphone is related to the strength of the bias voltage of the supporting circuit chip. [0003] The bias voltage of the traditional microphone supporting circuit chip cannot be adjusted. Due to the manufacturing process and structure, the MEMS sensors built into the microphone have great differences among different monomers of the same model. If all MEMS sensors use the same bias voltage, Then the individual differences in microphone sensitivity will be relatively large, so the sensitivity test screening yield is very likely to be low. For mass production testing, the yield is undoubtedly low a...

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Application Information

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IPC IPC(8): H04R29/00
Inventor 刘宏志朱佳辉
Owner SHANDONG GETTOP ACOUSTIC