CN103052015A - Method for realizing sensitivity consistence of microphone and adjustable-gain microphone - Google Patents
Method for realizing sensitivity consistence of microphone and adjustable-gain microphone Download PDFInfo
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- CN103052015A CN103052015A CN2012105195401A CN201210519540A CN103052015A CN 103052015 A CN103052015 A CN 103052015A CN 2012105195401 A CN2012105195401 A CN 2012105195401A CN 201210519540 A CN201210519540 A CN 201210519540A CN 103052015 A CN103052015 A CN 103052015A
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Abstract
The invention discloses a method for realizing sensitivity consistence of a microphone and an adjustable-gain microphone. A V/I conversion device of the microphone is an ASIC (Application Specific Integrated Circuit) having an adjustable gain function. The method comprises the following steps of: after the microphone is assembled, receiving the sensitivity of the microphone by using external debugging equipment, and testing the sensitivity of the microphone; judging whether the sensitivity of a test result is in a qualified sensitivity range or not, if not, controlling the ASIC to enter a gain adjusting state by using the external debugging equipment; and in a gain adjusting state, adjusting a gain according to the level of the sensitivity through the ASIC, and adjusting the sensitivity of the microphone into the qualified sensitivity range. The qualified sensitivity range is set through the external debugging equipment, and a manufactured product has a consistent sensitivity value due to the adoption of the ASIC having the adjustable gain function, so that the yield is increased, and the production cost is reduced.
Description
Technical field
The present invention relates to the mike technique field, in particular, relate to a kind of method and a kind of adjustable gain microphone of realizing that the sensitivity of microphone is consistent.
Background technology
MIC(Microphone, microphone or microphone), be the energy conversion device that voice signal is converted to the signal of telecommunication, also be known as microphone or microphone.At present, most of microphones all are ECM(Electret Condensor Microphone, electric capacitor microphone), its operation principle is to utilize the polymeric material vibrating membrane with permanent charge isolation.
The sensitivity of ECM is made of acoustic sensitiveness and two aspects of circuit gain, and wherein, acoustic sensitiveness is relevant with vibrating diaphragm area, diaphragm tensile force, polar plate spacing, polarization potential and the back of the body operatic tunes volume etc. of ECM; Circuit gain is relevant with aspects such as lead-out wire parasitic capacitance, amplifier gain and amplifier parasitic capacitances, the possible excursion of above-mentioned parameter is very limited, and its nuance is inevitable, and that its V/I switching device uses is J-FET, and for J-FET, its gain is fixed, the adjustment that cannot also cannot gain, and the nuance of parts and the difference of manufacturing process cause the dispersion of sensitivity.After ECM completes, in the situation that the later stage basis requires sensitivity, ECM is screened survey select qualified product, therefore, the distribution of sensitivity is still a kind of distribution situation of discrete type, error for+/-finished product of 2dB best also only be about 95%.
Therefore, because these differences are inevitable, a kind of method that realizes that the sensitivity of microphone is consistent is provided for this reason, can be after MIC completes, when being set, the sensitivity that needs make the product that is made into have consistent Sensitirity va1ue by adjusting gain, and then improve rate of finished products and reduce cost of manufacture, be those skilled in the art's problem demanding prompt solutions.
Summary of the invention
In view of this, the invention provides a kind of method and a kind of adjustable gain microphone of realizing that the sensitivity of microphone is consistent, to overcome in the prior art because the V/I switching device uses is J-FET, and for J-FET, its gain is fixed, the adjustment that cannot also cannot gain can't arrange the sensitivity that needs and make the product that is made into have consistent Sensitirity va1ue, and then improves the problem of rate of finished products and reduction cost of manufacture.
For achieving the above object, the invention provides following technical scheme:
The conforming method of a kind of realization sensitivity of microphone, the V/I switching device of described microphone is the ASIC integrated circuit with gain adjustable function, the method comprises:
Described microphone is after assembling is finished, and external debug equipment receives the sensitivity of described microphone, and the sensitivity of described microphone is tested;
Whether judge the sensitivity of test result in the described qualified range of sensitivity, if not, described external debug equipment is controlled described ASIC integrated circuit and is entered gain adjustment state;
Under described gain adjustment state, the adjustment that gains by described ASIC integrated circuit according to the height of sensitivity, with the sensitivity adjustment of described microphone to the described qualified range of sensitivity.
Wherein, described ASIC integrated circuit has two kinds of operating states, is specially: normal operating condition and gain adjustment state.
Wherein, under described gain adjustment state, the gain control register in the described ASIC integrated circuit is read and write adjustment.
The present invention is on above-mentioned disclosed a kind of basis of realizing the conforming method of the sensitivity of microphone, a kind of adjustable gain microphone is also disclosed, the V/I switching device of described microphone is the ASIC integrated circuit with gain adjustable function, and the gain control register in the described ASIC integrated circuit is read and write adjustment.
Wherein, described ASIC integrated circuit has two kinds of operating states, is specially: normal operating condition and gain adjustment state.
Via above-mentioned technical scheme as can be known, compared with prior art, the invention discloses a kind of method and a kind of adjustable gain microphone of realizing that the sensitivity of microphone is consistent, the V/I switching device of described microphone is the ASIC integrated circuit with gain adjustable function, the method comprises: described microphone is after assembling is finished, external debug equipment receives the sensitivity of described microphone, and the sensitivity of described microphone is tested; Whether judge the sensitivity of test result in the described qualified range of sensitivity, if not, described external debug equipment is controlled described ASIC integrated circuit and is entered gain adjustment state; Under described gain adjustment state, the adjustment that gains by described ASIC integrated circuit according to the height of sensitivity, with the sensitivity adjustment of described microphone to the described qualified range of sensitivity.By external debug equipment the qualified range of sensitivity is set, adopts the ASIC integrated circuit with gain adjustable function to make the product that is made into have consistent Sensitirity va1ue, thereby improve rate of finished products and lower production cost.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, the below will do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art, apparently, accompanying drawing in the following describes only is embodiments of the invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to the accompanying drawing that provides other accompanying drawing.
Fig. 1 is the disclosed a kind of method flow diagram of realizing that the sensitivity of microphone is consistent of the embodiment of the invention;
Fig. 2 is the disclosed a kind of adjustable gain microphone construction schematic diagram of the embodiment of the invention;
Fig. 3 is the schematic diagram of the disclosed ASIC integrated circuit of the embodiment of the invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that obtains under the creative work prerequisite.
The invention discloses a kind of method and a kind of adjustable gain microphone of realizing that the sensitivity of microphone is consistent, the V/I switching device of microphone is the ASIC integrated circuit with gain adjustable function, the method comprises: microphone is after assembling is finished, external debug equipment receives the sensitivity of described microphone, and the sensitivity of described microphone is tested; Whether judge the sensitivity of test result in the qualified range of sensitivity, if not, external debug equipment control ASIC integrated circuit enters gain adjustment state; Under gain adjustment state, the adjustment that gains by described ASIC integrated circuit according to the height of sensitivity, with the sensitivity adjustment of described microphone to the qualified range of sensitivity.By external debug equipment the qualified range of sensitivity is set, adopts the ASIC integrated circuit with gain adjustable function to make the product that is made into have consistent Sensitirity va1ue, thereby improve rate of finished products and lower production cost.
See also accompanying drawing 1, be the disclosed a kind of method flow diagram of realizing that the sensitivity of microphone is consistent of the embodiment of the invention.The embodiment of the invention discloses a kind of method that realizes that the sensitivity of microphone is consistent, the V/I switching device of described microphone is the ASIC integrated circuit with gain adjustable function, and the method concrete steps comprise:
Step S1: microphone is after assembling is finished, and external debug equipment receives the sensitivity of described microphone, and the sensitivity of described microphone is tested.
Step S2: judge that whether the sensitivity of test result is in the qualified range of sensitivity.
Step S3: if not, external debug equipment control ASIC integrated circuit enters gain adjustment state.
Step S4: if then do not do any change.
Step S5: under gain adjustment state, the adjustment that gains by the ASIC integrated circuit according to the height of sensitivity, with the sensitivity adjustment of microphone to the qualified range of sensitivity.
Use this ASIC integrated circuit in the microphone, it has 2 kinds of states: operating state (normal operating condition) and gain adjustment state, after the microphone assembling is finished, the qualified range of sensitivity is set, sensitivity to microphone is tested, the setting in scope does not make the ASIC integrated circuit enter " gain adjustment state ", according to the height of sensitivity and turn down or heighten the gain of ASIC integrated circuit, makes microphone get change of sensitivity in the qualified range of sensitivity.
The invention discloses a kind of method that realizes that the sensitivity of microphone is consistent, by external debug equipment the qualified range of sensitivity is set, the ASIC integrated circuit that employing has the gain adjustable function makes the product that is made into have consistent Sensitirity va1ue, thereby improves rate of finished products and lower production cost.
On the basis of the disclosed embodiment of the invention described above, see also accompanying drawing 2, be the structural representation of the disclosed a kind of adjustable gain microphone of the embodiment of the invention.The invention also discloses a kind of adjustable gain microphone, the V/I switching device of described microphone 1 is the ASIC integrated circuit 2 with gain adjustable function, and the gain control register in the described ASIC integrated circuit 2 is read and write adjustment.Described ASIC integrated circuit 2 has two kinds of operating states, is specially: normal operating condition and gain adjustment state.
See also accompanying drawing 3, be the schematic diagram of the disclosed ASIC integrated circuit of the embodiment of the invention.
Use this ASIC integrated circuit in the microphone, after the microphone assembling is finished, the qualified range of sensitivity is set, sensitivity to microphone is tested, the setting in scope does not make the ASIC integrated circuit enter " gain adjustment state ", according to the height of sensitivity and turn down or heighten the gain of ASIC integrated circuit, make microphone get change of sensitivity in the qualified range of sensitivity.
The invention discloses a kind of adjustable gain microphone, by external debug equipment the qualified range of sensitivity is set, the ASIC integrated circuit that employing has the gain adjustable function makes the product that is made into have consistent Sensitirity va1ue, thereby improves rate of finished products and lower production cost.
In sum: the invention discloses a kind of method and a kind of adjustable gain microphone of realizing that the sensitivity of microphone is consistent, the V/I switching device of microphone is the ASIC integrated circuit with gain adjustable function, the method comprises: microphone is after assembling is finished, external debug equipment receives the sensitivity of described microphone, and the sensitivity of described microphone is tested; Whether judge the sensitivity of test result in the qualified range of sensitivity, if not, external debug equipment control ASIC integrated circuit enters gain adjustment state; Under gain adjustment state, the adjustment that gains by described ASIC integrated circuit according to the height of sensitivity, with the sensitivity adjustment of described microphone to the qualified range of sensitivity.By external debug equipment the qualified range of sensitivity is set, adopts the ASIC integrated circuit with gain adjustable function to make the product that is made into have consistent Sensitirity va1ue, thereby improve rate of finished products and lower production cost.
To the above-mentioned explanation of the disclosed embodiments, make this area professional and technical personnel can realize or use the present invention.Multiple modification to these embodiment will be apparent concerning those skilled in the art, and General Principle as defined herein can in the situation that does not break away from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (5)
1. realize the conforming method of the sensitivity of microphone for one kind, it is characterized in that the V/I switching device of described microphone is the ASIC integrated circuit with gain adjustable function, the method comprises:
Described microphone is after assembling is finished, and external debug equipment receives the sensitivity of described microphone, and the sensitivity of described microphone is tested;
Whether judge the sensitivity of test result in the described qualified range of sensitivity, if not, described external debug equipment is controlled described ASIC integrated circuit and is entered gain adjustment state;
Under described gain adjustment state, the adjustment that gains by described ASIC integrated circuit according to the height of sensitivity, with the sensitivity adjustment of described microphone to the described qualified range of sensitivity.
2. method according to claim 1 is characterized in that, described ASIC integrated circuit has two kinds of operating states, is specially: normal operating condition and gain adjustment state.
3. method according to claim 1 is characterized in that, under described gain adjustment state, the gain control register in the described ASIC integrated circuit is read and write adjustment.
4. an adjustable gain microphone is characterized in that, the V/I switching device of described microphone is the ASIC integrated circuit with gain adjustable function, and the gain control register in the described ASIC integrated circuit is read and write adjustment.
5. microphone according to claim 4 is characterized in that, described ASIC integrated circuit has two kinds of operating states, is specially: normal operating condition and gain adjustment state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105195401A CN103052015A (en) | 2012-12-06 | 2012-12-06 | Method for realizing sensitivity consistence of microphone and adjustable-gain microphone |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012105195401A CN103052015A (en) | 2012-12-06 | 2012-12-06 | Method for realizing sensitivity consistence of microphone and adjustable-gain microphone |
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| CN103052015A true CN103052015A (en) | 2013-04-17 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017113899A1 (en) * | 2015-12-28 | 2017-07-06 | 努比亚技术有限公司 | Microphone calibration method, device, and mobile terminal, and storage medium |
| CN108810685A (en) * | 2018-06-06 | 2018-11-13 | 广州麦芮声电子有限公司 | A kind of digital microphone |
| CN108882134A (en) * | 2018-08-16 | 2018-11-23 | 杨辉强 | A kind of microphone of adjustable vibrating diaphragm area |
| CN113660579A (en) * | 2021-07-30 | 2021-11-16 | 歌尔微电子股份有限公司 | ASIC chip and MEMS microphone |
| CN114089249A (en) * | 2021-11-26 | 2022-02-25 | 广东美的暖通设备有限公司 | Filter circuit, eddy current sensor, debugging method and debugging device |
| CN114543975A (en) * | 2022-01-25 | 2022-05-27 | 青岛歌尔智能传感器有限公司 | Sensitivity calibration circuit, calibration method and device |
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| CN101155442A (en) * | 2006-09-26 | 2008-04-02 | 桑尼奥公司 | A calibrated microelectromechanical microphone |
| CN202197399U (en) * | 2011-08-19 | 2012-04-18 | 歌尔声学股份有限公司 | Capacitive microphone device |
| CN102740205A (en) * | 2011-04-04 | 2012-10-17 | 美国亚德诺半导体公司 | Packages and methods for packaging microphone devices |
| CN202979261U (en) * | 2012-12-06 | 2013-06-05 | 山东共达电声股份有限公司 | Adjustable gain microphone |
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2012
- 2012-12-06 CN CN2012105195401A patent/CN103052015A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101155442A (en) * | 2006-09-26 | 2008-04-02 | 桑尼奥公司 | A calibrated microelectromechanical microphone |
| CN102740205A (en) * | 2011-04-04 | 2012-10-17 | 美国亚德诺半导体公司 | Packages and methods for packaging microphone devices |
| CN202197399U (en) * | 2011-08-19 | 2012-04-18 | 歌尔声学股份有限公司 | Capacitive microphone device |
| CN202979261U (en) * | 2012-12-06 | 2013-06-05 | 山东共达电声股份有限公司 | Adjustable gain microphone |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017113899A1 (en) * | 2015-12-28 | 2017-07-06 | 努比亚技术有限公司 | Microphone calibration method, device, and mobile terminal, and storage medium |
| CN108810685A (en) * | 2018-06-06 | 2018-11-13 | 广州麦芮声电子有限公司 | A kind of digital microphone |
| CN108882134A (en) * | 2018-08-16 | 2018-11-23 | 杨辉强 | A kind of microphone of adjustable vibrating diaphragm area |
| CN108882134B (en) * | 2018-08-16 | 2023-08-01 | 重庆寻天科技有限公司 | Microphone with adjustable vibrating diaphragm area |
| CN113660579A (en) * | 2021-07-30 | 2021-11-16 | 歌尔微电子股份有限公司 | ASIC chip and MEMS microphone |
| CN114089249A (en) * | 2021-11-26 | 2022-02-25 | 广东美的暖通设备有限公司 | Filter circuit, eddy current sensor, debugging method and debugging device |
| CN114089249B (en) * | 2021-11-26 | 2024-05-28 | 广东美的暖通设备有限公司 | Filter circuit, eddy current sensor, debugging method and debugging device |
| CN114543975A (en) * | 2022-01-25 | 2022-05-27 | 青岛歌尔智能传感器有限公司 | Sensitivity calibration circuit, calibration method and device |
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Application publication date: 20130417 |