CN204929209U - Microphone monomer that restraines resonance - Google Patents
Microphone monomer that restraines resonance Download PDFInfo
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- CN204929209U CN204929209U CN201520257097.4U CN201520257097U CN204929209U CN 204929209 U CN204929209 U CN 204929209U CN 201520257097 U CN201520257097 U CN 201520257097U CN 204929209 U CN204929209 U CN 204929209U
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Abstract
The utility model relates to an electronic equipment technical field, especially, relate to a microphone monomer that restraines resonance, include the voltage input end through founing one, the inductor, bias circuit, the amplifier, the balanced device, the microphone monomer of buffer and wave filter, this balanced device sets up between amplifier and buffer, by the present technical scheme, the requirement of microphone to frequency response has been satisfied, it obtains restraining to have reached the high frequency, the frequency that needs to eliminate obtains eliminating, audio signal reaches anticipated effect through the regulation of balanced device, the quality after the audio signal transmission has effectively been improved.
Description
Technical field
The utility model relates to technical field of electronic equipment, particularly relates to a kind of microphone monomer suppressing resonance.
Background technology
Microphone requires certain requirement to frequency response in actual applications, as, high frequency needs to suppress, certain frequency signal needs to eliminate, and wind is made an uproar, car is made an uproar or the power frequency of 50HZ is made an uproar, and needs suppress, in prior art, microphone is formed primarily of the IC be integrated on pcb board (integrated circuit) and the amplifier be encapsulated in a box-shape and buffer, is encapsulated in metal-back the effect being arranged on and pcb board playing radio shielding, cannot completes the requirement to frequency response.
Put into metal-back due to transducer and will produce Andy Holmes resonance point, frequency response can be allowed to tilt upward, the car of low frequency is made an uproar in addition, the power frequency of wind-dryness or 50HZ is made an uproar and when loudspeaker and microphone near time the noise that produces warn microphone to amplify to pass to loudspeaker again, form primary Ioops, considerably increase noise, therefore, how to suppress to produce above-mentioned phenomenon and become a great problem that those skilled in the art face.
Utility model content
For the problems referred to above, the utility model proposes a kind of microphone monomer suppressing resonance, by directly adding the equalizer that comprises first order circuit, second level circuit and tertiary circuit between amplifier and buffer, make the sensing signal after amplifier amplifies become comparatively mild, this technical scheme is specially:
Suppress a microphone monomer for resonance, wherein, described microphone monomer comprises:
Power input;
Biasing circuit, is coupled to described power input, with output offset voltage;
Inductor, one end is connected with described biasing circuit, to receive and to sense described bias voltage, obtains sensing signal and is exported;
Amplifier, is connected with the other end of described inductor, amplifies rear output to described sensing signal;
Equalizer, is coupled to described amplifier, to regulate the sensing signal after amplifier amplifies;
Buffer, is connected with described equalizer, to ensure the data synchronization transmissions after described equalizer of the sensing signal after described amplification;
Filter, is coupled to described buffer, is filtered through the sensing signal after described buffer process.
Above-mentioned microphone monomer, wherein, described equalizer comprises the first order circuit, second level circuit and the tertiary circuit that connect successively, wherein:
First order circuit is connected with the output of described amplifier;
Tertiary circuit is connected with the input of described buffer.
Above-mentioned microphone monomer, wherein, described first order circuit also comprises:
First amplifier, the normal phase input end of described first amplifier is connected with one first voltage;
First electric capacity, the described first inverting input and output being capacitively coupled to described first amplifier;
One resistance, described resistance and described first Capacitance parallel connection.
Above-mentioned microphone monomer, wherein, described second level circuit also comprises:
Second amplifier, the normal phase input end of described second amplifier is connected with one second voltage;
The inverting input of described second amplifier is coupled to the output of described first amplifier;
One resistance, is coupled to inverting input and the output of described second amplifier.
Above-mentioned microphone monomer, wherein, described tertiary circuit also comprises:
3rd amplifier, described 3rd amplifier normal phase input end is connected with a tertiary voltage;
One electric capacity, is coupled to inverting input and the output of described 3rd amplifier;
The inverting input of described 3rd amplifier is coupled to the output of described second amplifier.
Above-mentioned microphone monomer, wherein, described inductor is a capacitive sensing device.
Preferably, the first voltage, the second voltage, tertiary voltage are equal.
The advantage that the utility model has and the beneficial effect that can reach:
By adopting the technical program, effectively prevent the generation of echo, effectively inhibit the part during low frequency wind is made an uproar, car is made an uproar or the power frequency of 50HZ is made an uproar simultaneously, make the audio signal of output comparatively mild, effectively inhibit the generation of noise, reach the requirement to frequency response.
Accompanying drawing explanation
By reading the detailed description done non-limiting example with reference to the following drawings, the utility model and characteristic shape thereof and advantage will become more apparent.Mark identical in whole accompanying drawing indicates identical part.Proportionally can not draw accompanying drawing, focus on purport of the present utility model is shown.
Fig. 1 is prior art microphone internal components structural representation;
Fig. 2 is microphone internal components structural representation in the utility model embodiment;
Fig. 3 is equalizer internal circuit diagram in the utility model embodiment.
Execution mode
Below in conjunction with accompanying drawing and specific embodiment, the utility model is further described, but not as restriction of the present utility model.
Structure shown in Figure 1, microphone internal components structure chart in conventional method, specifically comprise an inductor 1, biasing circuit 2, amplifier 3, buffer 4 and filter 5, wherein the voltage transitions that voltage input end VDD inputs is bias voltage by biasing circuit, inductor 1 can be a capacitance inductor, the biasing voltage signal that biasing circuit provides is transferred to amplifier 3 by inductor 1, sensing signal after amplifier amplifies eventually passes filter 5 through buffer 4 and filters out some clutters, then exports.
See structure shown in accompanying drawing 2, for including the microphone monomer internal components structural representation suppressing resonance in the utility model embodiment, mainly comprise voltage input end VDD, inductor 1, biasing circuit 2, amplifier 3, equalizer 6, buffer 4 and filter 5, wherein:
Biasing circuit 2, is coupled to voltage input end VDD, with output offset voltage;
Inductor 1, one end is connected with the output of biasing circuit 2, with receive and sense biasing circuit 2 export bias voltage, obtain sensing signal and exported;
Amplifier 3, is coupled to the other end relative to the one end be connected with biasing circuit 2 of inductor 1, amplifies rear output to the sensing signal that the inductor 1 got obtains;
Equalizer 6, is coupled to the other end relative to the one end be connected with inductor 1 of amplifier 3, to regulate the sensing signal after amplifier 3 amplifies;
Buffer 4, the input of this buffer is connected with the output of equalizer 6, to ensure the sensing signal synchronous transmission after equalizer equilibrium;
Filter 5, is coupled to the output of buffer, is filtered through the sensing signal after buffer process.
As the utility model preferred embodiment, structure shown in Figure 3, equalizer 6 comprises first order circuit 7, second level circuit 8 and tertiary circuit 9.
On this basis, further, first order circuit 7 specifically comprises:
The normal phase input end of the first amplifier 10, first amplifier 10 is connected with one first voltage;
First electric capacity, the first inverting input and output being capacitively coupled to the first amplifier;
Resistance R2, this resistance and the first Capacitance parallel connection.
Second level circuit 8 is a scaling circuit, specifically comprises:
The normal phase input end of the second amplifier 11, second amplifier 11 is connected with one second voltage;
The inverting input of the second amplifier 11 is coupled to the output of the first amplifier;
One resistance R4, is coupled to inverting input and the output of the second amplifier 11.
Tertiary circuit 9 specifically comprises:
The normal phase input end of the 3rd amplifier the 12, three amplifier 12 is connected with a tertiary voltage;
One electric capacity, this is capacitively coupled to inverting input and the output of the 3rd amplifier 12;
The inverting input of the 3rd amplifier 12 is coupled to the output of the second amplifier 11.
As the utility model preferred embodiment, the first voltage, the second voltage, tertiary voltage are all equal.
As the utility model preferred embodiment, between the second amplifier 11 and the first amplifier 10, be connected with a resistance R3.
As the utility model preferred embodiment, the reverse input end of the 3rd amplifier 12 is connected a resistance R5 with the output of the second amplifier 11.
As the utility model preferred embodiment, equalizer also comprises a negative feedback resistor R6, and this negative feedback resistor is connected between the input of equalizer and output.
In sum, the utility model comprises the microphone monomer of equalizer by structure one, and make wind-dryness, car is made an uproar etc. is eliminated, and effectively inhibits high frequency, effectively allows audio signal be undertaken regulating thus getting a desired effect by this equalizer.
It should be appreciated by those skilled in the art that those skilled in the art are realizing described change case in conjunction with prior art and above-described embodiment, do not repeat at this.Such change case does not affect flesh and blood of the present utility model, does not repeat them here.
Above preferred embodiment of the present utility model is described.It is to be appreciated that the utility model is not limited to above-mentioned particular implementation, the equipment wherein do not described in detail to the greatest extent and structure are construed as to be implemented with the common mode in this area; Any those of ordinary skill in the art, do not departing under technical solutions of the utility model ambit, the Method and Technology content of above-mentioned announcement all can be utilized to make many possible variations and modification to technical solutions of the utility model, or being revised as the Equivalent embodiments of equivalent variations, this does not affect flesh and blood of the present utility model.Therefore, every content not departing from technical solutions of the utility model, according to technical spirit of the present utility model to any simple modification made for any of the above embodiments, equivalent variations and modification, all still belongs to the scope of technical solutions of the utility model protection.
Claims (6)
1. suppress a microphone monomer for resonance, it is characterized in that, described microphone monomer comprises:
Power input;
Biasing circuit, is coupled to described power input, with output offset voltage;
Inductor, one end is connected with described biasing circuit, to receive and to sense described bias voltage, obtains sensing signal and is exported;
Amplifier, is connected with the other end of described inductor, amplifies rear output to described sensing signal;
Equalizer, is coupled to described amplifier, to regulate the sensing signal after amplifier amplifies;
Buffer, is connected with described equalizer, to ensure the data synchronization transmissions after described equalizer of the sensing signal after described amplification;
Filter, is coupled to described buffer, is filtered through the sensing signal after described buffer process.
2. microphone monomer as claimed in claim 1, it is characterized in that, described equalizer comprises the first order circuit, second level circuit and the tertiary circuit that connect successively, wherein:
First order circuit is connected with the output of described amplifier;
Tertiary circuit is connected with the input of described buffer.
3. microphone monomer as claimed in claim 2, it is characterized in that, described first order circuit also comprises:
First amplifier, the normal phase input end of described first amplifier is connected with one first voltage;
First electric capacity, the described first inverting input and output being capacitively coupled to described first amplifier;
One resistance, described resistance and described first Capacitance parallel connection.
4. microphone monomer as claimed in claim 3, it is characterized in that, described second level circuit also comprises:
Second amplifier, the normal phase input end of described second amplifier is connected with one second voltage;
The inverting input of described second amplifier is coupled to the output of described first amplifier;
One resistance, is coupled to inverting input and the output of described second amplifier.
5. microphone monomer as claimed in claim 4, it is characterized in that, described tertiary circuit also comprises:
3rd amplifier, described 3rd amplifier normal phase input end is connected with a tertiary voltage;
One electric capacity, is coupled to inverting input and the output of described 3rd amplifier;
The inverting input of described 3rd amplifier is coupled to the output of described second amplifier.
6. microphone monomer as claimed in claim 1, it is characterized in that, described inductor is a capacitive sensing device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520257097.4U CN204929209U (en) | 2015-04-24 | 2015-04-24 | Microphone monomer that restraines resonance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520257097.4U CN204929209U (en) | 2015-04-24 | 2015-04-24 | Microphone monomer that restraines resonance |
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| Publication Number | Publication Date |
|---|---|
| CN204929209U true CN204929209U (en) | 2015-12-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520257097.4U Active CN204929209U (en) | 2015-04-24 | 2015-04-24 | Microphone monomer that restraines resonance |
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| Country | Link |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106162435A (en) * | 2015-04-24 | 2016-11-23 | 钰太芯微电子科技（上海）有限公司 | A kind of mike monomer suppressing resonance |
| CN106658287A (en) * | 2016-11-11 | 2017-05-10 | 北京卓锐微技术有限公司 | Microphone system and amplifying circuit |
-
2015
- 2015-04-24 CN CN201520257097.4U patent/CN204929209U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106162435A (en) * | 2015-04-24 | 2016-11-23 | 钰太芯微电子科技（上海）有限公司 | A kind of mike monomer suppressing resonance |
| CN106658287A (en) * | 2016-11-11 | 2017-05-10 | 北京卓锐微技术有限公司 | Microphone system and amplifying circuit |
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| GR01 | Patent grant |