CN203313362U - A multi-mode micro mechanical microphone - Google Patents
A multi-mode micro mechanical microphone Download PDFInfo
- Publication number
- CN203313362U CN203313362U CN2013202740711U CN201320274071U CN203313362U CN 203313362 U CN203313362 U CN 203313362U CN 2013202740711 U CN2013202740711 U CN 2013202740711U CN 201320274071 U CN201320274071 U CN 201320274071U CN 203313362 U CN203313362 U CN 203313362U
- Authority
- CN
- China
- Prior art keywords
- mode selector
- signal
- bias voltage
- mode
- gain amplifier
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Landscapes
- Circuit For Audible Band Transducer (AREA)
Abstract
The utility model provides a multi-mode micro mechanical microphone comprising an acoustoelectric sensor, a mode selector connected with an external processing unit, a controlled amplifier connected with the mode selector, a controlled power supply connected with the mode selector. The mode selector is used for transforming mode selection signals output by the processing unit into corresponding gating signals and outputting the gating signals. The controlled amplifier is used for determining an amplification gain of electricity signals output by the acoustoelectric sensor based on the gating signals provided by the mode selector, amplifying the electricity signals according to the determined amplification gain, and outputting the amplified electricity signals. The controlled power supply connected with the mode selector is used for determining an offset voltage output to the acoustoelectric sensor based on the gating signal provided by the mode selector and outputting the determined offset voltage in order to provided the offset voltage for the acoustoelectric sensor to transform sound signals into the electric signals according to the determined offset voltage. According to the multi-mode micro mechanical microphone of the utility model, offering microphones with different sensitivity degrees in different applications is realized through the mode selection.
Description
Technical field
The utility model relates to a kind of micromachined microphones, particularly relates to a kind of multimodal micromachined microphones.
Background technology
Micromachined microphones (MEMS microphone) is based on a kind of microphone of CMOS/MEMS art designs, its consistency is than the high conformity of electric capacitor microphone more than 4 times, due to its good characteristic and minimum size, micromachined microphones is particularly suitable in the microphone array application of high performance-price ratio, for example, the electronic products such as mobile phone, notebook computer, panel computer, recording pen, digital camera.
At present, in order to allow micromachined microphones that the audio service of high-quality is provided in corresponding electronic product, the designer of micromachined microphones, according to the characteristic of the application of the electronic product at its place, carries out different designs to the sensitivity of micromachined microphones.For example, the microphone in mobile phone be because need to include the near field audio frequency, therefore its sensitivity is slightly low, and the microphone in digital camera be because need to include the far field audio frequency, and its sensitivity is had relatively high expectations.Along with the functional diversities of this electronic product, in an electronic product, may not only need to collect the near field audio frequency, also need to include the far field audio frequency.Such as, smart mobile phone possesses call function and video recording/sound-recording function mostly.This makes the single sensitivity of existing micromachined microphones can not meet the needs of electronic equipment different application scene.Therefore, need to improve existing micromachined microphones.
The utility model content
The shortcoming of prior art in view of the above, the purpose of this utility model is to provide a kind of multimodal micromachined microphones, for the nonadjustable problem of the sensitivity that solves the prior art micromachined microphones.
Reach for achieving the above object other relevant purposes, the utility model provides a kind of multimodal micromachined microphones, and it comprises at least: acoustoelectric sensor; The mode selector be connected with outside processing unit, convert corresponding gating signal to and exported for the mode select signal that described processing unit is exported; The controlled amplification device be connected with described mode selector, the gain amplifier of the signal of telecommunication that described acoustoelectric sensor is exported is provided for the gating signal provided based on described mode selector, and amplify the described signal of telecommunication according to determined gain amplifier, and the signal of telecommunication after amplifying is exported; The controlled source be connected with described mode selector, for the gating signal provided based on described mode selector, determine the bias voltage of exporting to described acoustoelectric sensor, and export determined bias voltage, for described acoustoelectric sensor, according to determined bias voltage, voice signal is converted to the signal of telecommunication and exported.
Preferably, described microphone also comprises: encapsulate the shell of described acoustoelectric sensor, mode selector, controlled amplification device and controlled source, and by a plurality of pins that extend to outer surface in described shell;
Wherein, described pin comprises: the output pin be connected with described controlled amplification device; The power pins be connected with described controlled source; Be used to described acoustoelectric sensor, mode selector, controlled amplification device and controlled source that the grounding pin of ground wire is provided; And the model selection pin be connected with described mode selector.
Preferably, be provided be used to including the hole of sound in a side of described shell, be provided with each described pin at described shell opposite side.
Preferably, described mode selector comprises: nonvolatile memory, be used to store default mode select signal respectively with the corresponding relation of gain amplifier and bias voltage; The processor be connected with described nonvolatile memory, for determining from the corresponding gain amplifier of the mode select signal of outside processing unit and bias voltage each mode select signal from being stored in described nonvolatile memory; The gating module be connected with described processor, for according to the resulting gain amplifier of described processor and bias voltage, mean the gating signal of gain amplifier and bias voltage to described controlled amplification device and controlled source output respectively for correspondence.
Preferably, described mode select signal comprises: a kind of in hands-free mode, recording/video recording pattern, near field call mode.
As mentioned above, multimodal micromachined microphones of the present utility model, has following beneficial effect: received and tupe selection signal by mode selector, and control controlled amplification device and controlled source according to mode select signal, by model selection, realize providing the sensitivity that meets application scenarios under a different application scenarios, to guarantee by high-quality audio frequency; Especially, in the function of smart mobile phone increasing today, the utility model can help smart mobile phone to provide more perfect audio frequency to include function; In addition, by an existing power pins (VDD) or grounding pin (GND) are made into to the model selection pin and are connected to come receiving mode selection signal with outside processing unit, avoid on existing micromachined microphones, increasing new pin, can avoid the change of existing peripheral interface unit.
The accompanying drawing explanation
Fig. 1 is shown as the structural representation of multimodal micromachined microphones of the present utility model.
Fig. 2 is shown as the side schematic view of the shell in multimodal micromachined microphones of the present utility model.
Fig. 3 is shown as the pin schematic diagram on the shell in multimodal micromachined microphones of the present utility model.
The element numbers explanation
1 micromachined microphones
11 acoustoelectric sensors
12 mode selectors
13 controlled amplification devices
14 controlled sources
15 shells
151 output pins
152 power pins
153 grounding pins
154 model selection pins
Embodiment
Below by particular specific embodiment explanation execution mode of the present utility model, person skilled in the art scholar can understand other advantages of the present utility model and effect easily by the disclosed content of this specification.
Refer to Fig. 1 to Fig. 3.Notice, the appended graphic structure illustrated of this specification, ratio, size etc., equal contents in order to coordinate specification to disclose only, for person skilled in the art scholar, understand and read, not in order to limit the enforceable qualifications of the utility model, therefore the technical essential meaning of tool not, the adjustment of the modification of any structure, the change of proportionate relationship or size, do not affecting under the effect that the utility model can produce and the purpose that can reach, all should still drop on the technology contents that the utility model discloses and obtain in the scope that can contain.
As shown in Figure 1, the utility model provides a kind of multimodal micromachined microphones.Described micromachined microphones 1 is arranged on to be had in the electronic equipment of collecting audio function, and is subjected to the control of the processing unit 2 in described electronic equipment to adjust the sensitivity of self.Wherein, described electronic equipment includes but not limited to: mobile phone, panel computer etc.Described processing unit 2 can be according to the service condition of electronic equipment to the described microphone 1 selection signal that supplies a pattern, and it is mainly the process chip that comprises CPU.Particularly, described micromachined microphones 1 comprises: acoustoelectric sensor 11, mode selector 12, controlled amplification device 13, controlled source 14.
Described acoustoelectric sensor 11 is for converting voice signal to the signal of telecommunication.Particularly, described acoustoelectric sensor 11 converts acoustic pressure to the variation of the polar plate spacing of silicon microphone electric capacity, and the signal of telecommunication changed according to the variation output voltage between polar plate spacing.
Described mode selector 12 for the mode select signal based on default respectively with the corresponding relation of gain amplifier and bias voltage, determine the corresponding gain amplifier of mode select signal and the bias voltage from outside processing unit 2, exported, and exported.Wherein, described mode select signal includes but not limited to: a kind of in hands-free mode, recording/video recording pattern, near field call mode.Wherein, described corresponding relation can be the chain sheet form.Described bias voltage includes but not limited to: supply power voltage etc.
Particularly, described mode selector 12 is connected with the processing unit 2 of described electronic equipment, during application scenarios as the user at the described microphone 1 of conversion, described processing unit 2 is selected signal based on described user's selection to described mode selector 12 output modes, described mode selector 12, according to default mode select signal and the corresponding relation of gating signal, is exported the received corresponding gating signal of mode select signal.
For example, described mode selector 12 is a digital decoder, and prestores the corresponding relation that various modes is selected signal and gating signal, when the mode select signal received is 100, according to described corresponding relation, from low transition, be high level by the 4th output, with the output gating signal.
Preferably, described mode selector 12 is for comprising chip or the circuit of Programmable Logic Device, and it comprises: nonvolatile memory, processor and gating module.
Described nonvolatile memory for store default mode select signal respectively with the corresponding relation of gain amplifier and bias voltage.Described nonvolatile memory is flash chip etc.
Described processor is used for from each mode select signal that is stored in described nonvolatile memory, determining from the corresponding gain amplifier of the mode select signal of outside processing unit 2 and bias voltage.Described processor can be programmable gate array.
Described gating module, for according to the resulting gain amplifier of described processor and bias voltage, means the gating signal of gain amplifier and bias voltage to described controlled amplification device 13 and controlled source 14 outputs respectively for correspondence.Described gating module can be gate.
For example, the user presses hands-free button in communication process, described processing unit 2 is based on user's operation output hands-free mode, described processor is determined the corresponding gain amplifier of hands-free mode and bias voltage with the corresponding relation of gain amplifier and bias voltage respectively according to the mode select signal of storing in described nonvolatile memory, and the corresponding gating signal of determined gain amplifier is transported to described controlled amplification device 13, the corresponding gating signal of described bias voltage is transported to described controlled source 14.
Described controlled amplification device 13 is connected with described mode selector 12, the gain amplifier of the signal of telecommunication that described acoustoelectric sensor 11 is exported is provided for the gating signal provided based on described mode selector 12, and amplify the described signal of telecommunication according to determined gain amplifier, and the signal of telecommunication after amplifying is exported.
Particularly, described controlled amplification device 13 determines based on default gating signal and the corresponding relation of gain amplifier the corresponding gain amplifier of gating signal that described mode selector 12 is exported, and the signal of telecommunication that described acoustoelectric sensor 11 is exported gives corresponding amplification according to determined gain amplifier, and output.Wherein, described gain amplifier can be embodied by the cascade quantity of amplifier.
For example, described controlled amplification device 13 comprises the amplifier of first control circuit and a plurality of cascades, described first control circuit receives the gating signal of the 4th output output of described mode selector 12, according to the corresponding relation of the cascade quantity of each output of default described mode selector 12 and amplifier, determine the cascade quantity of the corresponding amplifier of gating signal that the 4th output exported, and adjusted, with output, meet the signal of telecommunication of determined gain amplifier.
Preferably, described controlled amplification device 13 is according to the departure degree between the corresponding gain amplifier of described gating signal and current gain amplifier, improve or reduce the gain amplifier of self, change thus the multiplication factor of the signal of telecommunication that described acoustoelectric sensor 11 exports, and amplify and export the described signal of telecommunication.Wherein, described departure degree can be the poor of the corresponding gain amplifier of gating signal exported of described mode selector and current gain amplifier, can be also the ratio of the gain amplifier exported of described mode selector and current gain amplifier.
Described controlled source 14 is connected with described mode selector 12, for the gating signal provided based on described mode selector 12, determine the bias voltage of exporting to described acoustoelectric sensor 11, and exported,, according to determined bias voltage, convert voice signal to the signal of telecommunication for described acoustoelectric sensor.
Particularly, described controlled source 14 determines based on default gating signal and the corresponding relation of bias voltage the corresponding bias voltage of gating signal that described mode selector 12 is exported, and providing determined bias voltage to described acoustoelectric sensor 11, described acoustoelectric sensor 11 is regulated its capacitance pole spacing according to the size of the bias voltage that described controlled electric eye 14 provides.
For example, described controlled source 14 comprises second control circuit and power circuit, described second control circuit is determined the gating signal from the 4th output output of described mode selector 12 according to the corresponding relation of default gating signal and bias voltage, and adjust described power circuit according to determined bias voltage, make described power circuit that corresponding bias voltage can be provided, to change the bias voltage of described acoustoelectric sensor 11.
Preferably, described controlled source 14 can also be according to the departure degree between the corresponding bias voltage of described gating signal and current bigoted voltage, adjusts the bias voltage of self output.Wherein, described departure degree can be the poor of the corresponding bias voltage of gating signal exported of described mode selector and current bias voltage, can be also the ratio of the corresponding bias voltage of gating signal exported of described mode selector and current bias voltage.
For example, described controlled source 14 calculate gating signal that described mode selector 12 exports corresponding bias voltage and current bias voltage poor, if described difference is greater than zero, increase the bias voltage of described controlled source 14 outputs, otherwise, reduce the bias voltage that described controlled source 14 is exported.
As shown in Figure 2, described micromachined microphones 1 also comprises: shell 15 and a plurality of pin.
Described shell 15 is be used to encapsulating described acoustoelectric sensor 11, mode selector 12, controlled amplification device 13 and controlled source 14.
Particularly, described shell 15 is metal shell 15, and shell 15 1 sides have the hole of collecting sound, and described acoustoelectric sensor 11 is positioned at place, described hole.At the opposite side of shell 15, be provided with a plurality of pins, wherein, as shown in Figure 3, described pin comprises:
The output pin 151 be connected with described controlled amplification device 13, for the signal of telecommunication of output after described controlled amplification device 13 amplifies.
With the power pins 152 that described controlled source 14 is connected, be used to each electric device power supply in described micromachined microphones 1.
And, be used to connecting the model selection pin 154 that described mode selector 12 can described processing unit 2.
The structure of described micromachined microphones 1 is as follows:
Each pin on described shell 15 with the annexation of the electric devices such as described controlled source 14, mode selector 12, controlled amplification device 13 and acoustoelectric sensor 11 is: external power supply is connected with described controlled source 14 by described power pins 152, with each electric device power supply in described microphone 1; All electric devices that described grounding pin 153 connects in described micromachined microphones 1, think that each electric device provides electric loop; Described model selection pin 154 is connected outside processing unit 2 with described mode selector 12, so that the transmission mode selection signal; Output pin 151 connects described controlled amplification device 13, with the signal of telecommunication (being audio signal) that corresponding sensitivity requires that meets after the output amplification;
In described shell 15 inside, described controlled source 14 connects acoustoelectric sensor 11, and acoustoelectric sensor 11 connects controlled amplification device 13, and mode selector 12 connects controlled source 14 and controlled amplification device 13.
The course of work of described micromachined microphones 1 is exemplified below:
Outside processing unit 2 is selected signal by model selection pin 154 to described mode selector 12 output modes based on user's model selection operation, processor in described mode selector 12 is from described nonvolatile memory, searching for the corresponding gain amplifier of the mode select signal received and bias voltage, and converts corresponding gain amplifier and bias voltage to corresponding gating signal respectively by the gating module; And correspondence is transported to described controlled amplification device 13 and described controlled source 14, described controlled source 14 adjusts according to the difference of the corresponding bias voltage of the gating signal received and current bias voltage the bias voltage that it transports to described acoustoelectric sensor 11, makes the measuring range of described acoustoelectric sensor 11 do corresponding adjustment; Described controlled amplification device 13 is adjusted the gain amplifier of self amplifier according to the difference of the corresponding gain amplifier of the gating signal received and current gain amplifier, finally changed the sensitivity of described micromachined microphones 1, also be called sensitivity, make described micromachined microphones 1 that different sensitivity can be provided under different mode, to meet the different needs of different application scene to microphone 1.
In sum, multimodal micromachined microphones of the present utility model, by mode selector, received and tupe selection signal, and control controlled amplification device and controlled source according to mode select signal, by model selection, realize providing the sensitivity that meets application scenarios under a different application scenarios, to guarantee by high-quality audio frequency; Especially, in the function of smart mobile phone increasing today, the utility model can help smart mobile phone to provide more perfect audio frequency to include function; In addition, by an existing power pins (VDD) or grounding pin (GND) are made into to the model selection pin and are connected to come receiving mode selection signal with outside processing unit, avoid on existing micromachined microphones, increasing new pin, can avoid the change of existing peripheral interface unit.So the utility model has effectively overcome various shortcoming of the prior art and the tool high industrial utilization.
Above-described embodiment is illustrative principle of the present utility model and effect thereof only, but not be used to limiting the utility model.Any person skilled in the art scholar all can, under spirit of the present utility model and category, modify or change above-described embodiment.Therefore, have in technical field under such as and know that usually the knowledgeable modifies or changes not breaking away from all equivalences that complete under spirit that the utility model discloses and technological thought, must be contained by claim of the present utility model.
Claims (6)
1. a multimodal micromachined microphones, is characterized in that, comprises at least:
Acoustoelectric sensor;
The mode selector be connected with outside processing unit, convert corresponding gating signal to and exported for the mode select signal that described processing unit is exported;
The controlled amplification device be connected with acoustoelectric sensor with described mode selector, the gain amplifier of the signal of telecommunication that described acoustoelectric sensor is exported is provided for the gating signal provided based on described mode selector, and amplify the described signal of telecommunication according to determined gain amplifier, and the signal of telecommunication after amplifying is exported;
The controlled source be connected with described mode selector, for the gating signal provided based on described mode selector, determine the bias voltage of exporting to described acoustoelectric sensor, and export determined bias voltage, for described acoustoelectric sensor, according to determined bias voltage, voice signal is converted to the signal of telecommunication and exported.
2. multimodal micromachined microphones according to claim 1, it is characterized in that, described microphone also comprises: encapsulate the shell of described acoustoelectric sensor, mode selector, controlled amplification device and controlled source, and by a plurality of pins that extend to outer surface in described shell;
Wherein, described pin comprises:
The output pin be connected with described controlled amplification device;
The power pins be connected with described controlled source;
Be used to described acoustoelectric sensor, mode selector, controlled amplification device and controlled source that the grounding pin of ground wire is provided; And
The model selection pin be connected with described mode selector.
3. multimodal micromachined microphones according to claim 2, is characterized in that, is provided be used to including the hole of sound in a side of described shell, is provided with each described pin at described shell opposite side.
4. multimodal micromachined microphones according to claim 1, is characterized in that, described mode selector comprises:
Nonvolatile memory, be used to store default mode select signal respectively with the corresponding relation of gain amplifier and bias voltage.
5. multimodal micromachined microphones according to claim 4, is characterized in that, described mode selector also comprises:
The processor be connected with described nonvolatile memory, for determining from the corresponding gain amplifier of the mode select signal of outside processing unit and bias voltage each mode select signal from being stored in described nonvolatile memory.
6. multimodal micromachined microphones according to claim 5, is characterized in that, described mode selector also comprises:
The gating module be connected with described processor, for according to the resulting gain amplifier of described processor and bias voltage, mean the gating signal of gain amplifier and bias voltage to described controlled amplification device and controlled source output respectively for correspondence.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202740711U CN203313362U (en) | 2013-05-17 | 2013-05-17 | A multi-mode micro mechanical microphone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202740711U CN203313362U (en) | 2013-05-17 | 2013-05-17 | A multi-mode micro mechanical microphone |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203313362U true CN203313362U (en) | 2013-11-27 |
Family
ID=49619530
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013202740711U Expired - Lifetime CN203313362U (en) | 2013-05-17 | 2013-05-17 | A multi-mode micro mechanical microphone |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203313362U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104168529A (en) * | 2013-05-17 | 2014-11-26 | 上海耐普微电子有限公司 | Multi-mode micro-mechanical microphone |
| WO2016078233A1 (en) * | 2014-11-17 | 2016-05-26 | 中兴通讯股份有限公司 | Recording method and apparatus, and terminal |
-
2013
- 2013-05-17 CN CN2013202740711U patent/CN203313362U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104168529A (en) * | 2013-05-17 | 2014-11-26 | 上海耐普微电子有限公司 | Multi-mode micro-mechanical microphone |
| CN104168529B (en) * | 2013-05-17 | 2018-08-28 | 上海耐普微电子有限公司 | The micromachined microphones of multi-mode |
| WO2016078233A1 (en) * | 2014-11-17 | 2016-05-26 | 中兴通讯股份有限公司 | Recording method and apparatus, and terminal |
| CN105679356A (en) * | 2014-11-17 | 2016-06-15 | 中兴通讯股份有限公司 | Recording method, device and terminal |
| CN105679356B (en) * | 2014-11-17 | 2019-02-15 | 中兴通讯股份有限公司 | The way of recording, device and terminal |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104168529A (en) | Multi-mode micro-mechanical microphone | |
| CN105280195B (en) | The processing method and processing device of voice signal | |
| US20210217433A1 (en) | Voice processing method and apparatus, and device | |
| CN104853280B (en) | A kind of microphone and its control method of expansible dynamic range | |
| CN110134363A (en) | Use loudspeaker as the device and method of microphone in a mobile device | |
| US11375310B2 (en) | Audio signal processing method and apparatus, and device | |
| CN108184201A (en) | audio testing method, audio test system | |
| CN105245993A (en) | Automatic earphone volume adjusting method and system, and smart earphone | |
| US11395059B2 (en) | Master/slave switching method for wearable apparatus and related product | |
| US20180164891A1 (en) | Gesture recognition system and gesture recognition method using the same | |
| CN108897516A (en) | A kind of wearable device method for regulation of sound volume and Related product | |
| CN103024625A (en) | High precision acoustic senseing device and acoustic camera using microphone array | |
| CN203313362U (en) | A multi-mode micro mechanical microphone | |
| WO2022262410A1 (en) | Sound recording method and apparatus | |
| CN106453909B (en) | A kind of power regulating method and mobile terminal | |
| CN112749867A (en) | Method and device for determining influence factors of efficiency of oil pumping well system and storage medium | |
| CN114339509A (en) | Wireless earphone | |
| CN202798855U (en) | Microphone circuit module with reverberation and monitoring functions | |
| CN206821013U (en) | A kind of new MEMS microphone | |
| CN110211612A (en) | A kind of recording pen and the way of recording | |
| CN105721710A (en) | Recording method and apparatus, and electronic device | |
| CN105657598B (en) | A kind of earphone control device suitable for user terminal | |
| CN204906687U (en) | Intelligent wearing equipment that possesses directional sound transmission function | |
| CN106534589A (en) | Mobile terminal control method and mobile terminal | |
| CN105142070A (en) | Intelligent wearable device with directional sound emission function |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: Bi Sheng Lu Pudong New Area Zhangjiang hi tech park Shanghai 201204 Lane 299 building 11 room 202A Patentee after: YUTAIXIN MICROELECTRONICS TECHNOLOGY (SHANGHAI) Co.,Ltd. Patentee after: ZILLTEK TECHNOLOGY Corp. Address before: Bi Sheng Lu Pudong New Area Zhangjiang hi tech park Shanghai 201204 Lane 299 building 11 room 202A Patentee before: SHANGHAI SNIPER MICROELECTRONICS Patentee before: ZILLTEK TECHNOLOGY CORP. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131127 |