CN106612472A - Microphone-based regulation circuit and microphone - Google Patents
Microphone-based regulation circuit and microphone Download PDFInfo
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- CN106612472A CN106612472A CN201510698721.9A CN201510698721A CN106612472A CN 106612472 A CN106612472 A CN 106612472A CN 201510698721 A CN201510698721 A CN 201510698721A CN 106612472 A CN106612472 A CN 106612472A
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- regulation
- resistance
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- mike
- branch road
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Abstract
The invention relates to the technical field of voice signal processing, and particularly relates to a microphone-based regulation circuit and a microphone. An electrical signal acquired through an acquisition circuit is very weak. The electrical signal is amplified through a first amplifier. As the electrical signal through primary amplification still cannot drive a follow-up circuit, there is a need for secondary amplification of the electrical signal. In order to reduce attenuation of the high-frequency or low-frequency part of the electrical signal, before secondary amplification of the electrical signal, the unnecessary high-frequency or low-frequency component in the electrical signal is filtered through a regulation branch, and the electrical signal after filtering is amplified. Thus, the frequency domain response curve of the electrical signal is straight, and the quality of output sound of the microphone is improved. In the application, the frequency response of the high-frequency part of the microphone circuit is regulated through the regulation branch, so that the whole frequency response curve is 'dragged' straight, and the quality of output sound of the microphone is improved.
Description
Technical field
The present invention relates to a kind of sound signal processing technical field, more particularly to a kind of tune based on mike
Economize on electricity road and mike.
Background technology
Frequency response refer to by one with constant voltage export audio signal be connected with system when, mike
The acoustic pressure of collection with the change of frequency increase or decay, the phenomenon that phase place changes with frequency,
This acoustic pressure and phase place are referred to as frequency response with the variation relation being associated of frequency.Also refer to and permit in amplitude
Perhaps the frequency range that sound system can be reset in the range of, and the variable quantity of signal claims within this range
For frequency response, frequency characteristic is also.
Frequency response is to the digital-to-analogue in mike or harvester/analog-digital converter frequency response ability
One evaluation criterion.Good frequency response, is can to export stably enough signals in each Frequency point,
Signal magnitude between different frequency point is.But existing mike, its frequency response lead to
Frequency response curve as shown in Figure 1 can be often presented, a rising drastically occurs in HFS and
Occur decline drastically afterwards, and then cause signal relatively difficult in the reconstruction of HFS so that signal exists
Low-frequency range generally has the phenomenon of decay.The better device of output quality, frequency response curve is more straight,
Otherwise not only decay quickly in high frequency treatment, in general frequency range, it is also possible to the phenomenon of shake is presented so that
The quality of microphone output signal is substantially reduced.
The content of the invention
For the deficiencies in the prior art, the present invention provide one kind can with regulating frequency response, and mike is defeated
Go out the good regulation circuit based on mike of tonequality and mike.
The technical purpose of the present invention is realized by following technological means：
A kind of regulation circuit based on mike, wherein, including：
Signal amplification unit, to receive an acoustical signal, is amplified process to the acoustical signal, and
The acoustical signal after processing and amplifying is exported to signal processing unit；
Wherein, the signal amplification unit includes the first amplifier, connects first amplification by a resistance
Second amplifier of device, also adjusts branch road including one, and the regulation branch road is connected to second amplifier
Between publicly.
Preferably, the above-mentioned regulation circuit based on mike, wherein：The regulation branch road includes a regulation
Electric capacity, the regulation electric capacity form high frequency Regulate signal with the resistance.
Preferably, the above-mentioned regulation circuit based on mike, wherein：The regulation branch road includes a regulation
Electric capacity and one adjusts resistance, the regulation resistance and the regulation resistant series, the regulation branch road and institute
State resistance and form a first kind frequency compensation signal.
Preferably, the above-mentioned regulation circuit based on mike, wherein：The regulation branch road includes a regulation
Electric capacity and one adjusts inductance, and the regulation resistance is connected with the regulation inductance, described to adjust branch road and institute
State resistance and form an Equations of The Second Kind frequency compensation signal.
Present invention simultaneously provides a kind of mike, wherein：The mike include power pins, grounding pin,
Output pin, also include an adjustment pin.
Preferably, above-mentioned mike, wherein：The adjustment pin is to connect a regulation branch road.
Preferably, above-mentioned mike, wherein：The regulation branch road includes a regulation electric capacity, the regulation
Electric capacity forms high frequency Regulate signal with the resistance inside the mike.
Preferably, above-mentioned mike, wherein：The regulation branch road includes that a regulation electric capacity and one adjusts electricity
Resistance, the regulation resistance and the regulation resistant series, the regulation branch road form first with the resistance
Quefrency thermal compensation signal.
Preferably, above-mentioned mike, wherein：The regulation branch road includes that a regulation electric capacity and one adjusts electricity
Sense, the regulation resistance are connected with the regulation inductance, and the regulation branch road forms second with the resistance
Quefrency thermal compensation signal.
Compared with prior art, it is an advantage of the invention that：
The collecting unit of mike picks up the acoustical signal of surrounding, and acoustic signals are converted to accordingly
Electric signal output, the signal of telecommunication obtained by collecting unit are weaker faint, by the first amplifier to telecommunications
Number it is amplified, subsequent conditioning circuit still cannot be driven by the signal of telecommunication amplified through one-level, it is still desirable to
Two grades are carried out to the signal of telecommunication and amplifies (entering the processing and amplifying of horizontal electrical signal by the second amplifier), in order to subtract
The decay of the high frequency or low frequency part of few signal of telecommunication, before the signal of telecommunication carries out secondary processing and amplifying, passes through
Unnecessary high-frequency components or low frequency component in one regulation branch road filtering electric signal, will be processed after filtering
The signal of telecommunication afterwards is amplified process so that the frequency response curve of the signal of telecommunication is in straightened condition, improves
Mike exports tonequality.In the application, by adjusting the frequency that branch road adjusts the HFS of microphone circuit
Rate is responded so that whole frequency response curve " being dragged " is straight, improves the output tonequality of mike.
Description of the drawings
Fig. 1 is the frequency response curve schematic diagram of existing mike；
Fig. 2 is structural representation of the present invention based on the regulation circuit of mike；
Fig. 3 is the frequency response curve schematic diagram of medium-high frequency Regulate signal of the present invention；
Fig. 4 is the frequency response curve schematic diagram of first kind frequency compensation signal in the present invention；
Fig. 5 is the frequency response curve schematic diagram of Equations of The Second Kind frequency compensation signal in the present invention；
Specific embodiment
The invention will be further described with specific embodiment below in conjunction with the accompanying drawings, but not as the present invention's
Limit.
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out
Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of the invention, and
It is not all, of embodiment.Based on the embodiment in the present invention, those of ordinary skill in the art are without work
The every other embodiment obtained on the premise of going out creative work, belongs to the scope of protection of the invention.
It should be noted that the embodiment and the spy in embodiment in the case where not conflicting, in the present invention
Levy and can be mutually combined.
The invention will be further described with specific embodiment below in conjunction with the accompanying drawings, but not as the present invention's
Limit.
As shown in Fig. 2 a kind of regulation circuit based on mike, wherein, including：
First amplifier is amplified process to the acoustical signal so that
Wherein, the signal amplification unit is included the first amplifier, is put by resistance connection described first
Second amplifier of big device, also adjusts branch road including one, and the regulation branch road is connected to described second and amplifies
Device and publicly between.
The collecting unit of mike picks up the acoustical signal of surrounding, and acoustic signals are converted to accordingly
Electric signal output, the signal of telecommunication obtained by collecting unit are weaker faint, by the first amplifier to telecommunications
Number it is amplified, subsequent conditioning circuit still cannot be driven by the signal of telecommunication amplified through one-level, it is still desirable to
Two grades are carried out to the signal of telecommunication and amplifies (entering the processing and amplifying of horizontal electrical signal by the second amplifier), in order to subtract
The decay of the high frequency or low frequency part of few signal of telecommunication, before the signal of telecommunication carries out secondary processing and amplifying, passes through
Unnecessary high-frequency components or low frequency component in one regulation branch road filtering electric signal, will be processed after filtering
The signal of telecommunication afterwards is amplified process so that the frequency response curve of the signal of telecommunication is in straightened condition, improves
Mike exports tonequality.In the application, by adjusting the frequency that branch road adjusts the HFS of microphone circuit
Rate is responded so that whole frequency response curve " being dragged " is straight, improves the output tonequality of mike.
As further preferred embodiment, the above-mentioned regulation circuit based on mike, wherein：The tune
Section branch road includes a regulation electric capacity, and the regulation electric capacity forms a high frequency Regulate signal with the resistance.It is high
Frequency Regulate signal is as shown in figure 3, by a high frequency Regulate signal and the signal of telecommunication after processing and amplifying
Superposition, the HFS (i.e. ledge in frequency curve) in filtering electric signal, the frequency domain after superposition are bent
Line is integrally flattened, and is beneficial to improve the stability of microphone output signal.
As further preferred embodiment, the above-mentioned regulation circuit based on mike, wherein：The tune
Section branch road includes that a regulation electric capacity and one adjusts resistance, the regulation resistance and the regulation resistant series,
The regulation branch road forms a first kind frequency compensation signal with the resistance.
First kind frequency compensation signal as shown in figure 4, be adjusted to the signal of telecommunication by high frequency Regulate signal,
Although whole frequency curve can be caused in a straightened condition, while a drawback is also brought, and
The energy amplitude of whole frequency curve is lowered, meanwhile, the electrical signal energy amplitude of non-ledge is drawn
It is low more, after preventing high frequency regulation branch road to be superimposed with the signal of telecommunication, there is the signal amplitude of HFS
It is too low, branch road is adjusted by a band logical, the minimum energy range value of the signal of telecommunication after processing and amplifying is limited,
It is convenient that secondary processing and amplifying is subsequently done to the signal of telecommunication.
As further preferred embodiment, the above-mentioned regulation circuit based on mike, wherein：The tune
Section branch road includes a regulation electric capacity and one adjusts inductance, and the regulation resistance is connected with the regulation inductance,
The regulation branch road forms an Equations of The Second Kind frequency compensation signal with the resistance.
As shown in figure 5, the frequency curve chart of Equations of The Second Kind frequency compensation signal, generally adjusts electric capacity and adjusts electricity
Sense series connection forms the signal of telecommunication that frequency curve (Equations of The Second Kind frequency compensation signal) is just gathered with mike
Frequency curve is symmetrical, to be formed in frequency response curve and the signal of telecommunication by adjusting electric capacity and adjusting inductance to connect
High frequency ledge so that whole frequency response curve " being dragged " is straight, improve mike output
Tonequality.
Present invention simultaneously provides a kind of mike, wherein：The mike include power pins, grounding pin,
Output pin, also include an adjustment pin.
As further preferred embodiments, above-mentioned mike, wherein：The adjustment pin is to connect
One adjusts branch road.
As further preferred embodiments, above-mentioned mike, wherein：The regulation branch road includes a tune
Economize on electricity is held, and the electric capacity that adjusts forms a low-pass filter circuit with the resistance inside the mike.
As further preferred embodiments, above-mentioned mike, wherein：The regulation branch road includes a tune
Economize on electricity is held and one adjusts resistance, the regulation resistance and the regulation resistant series, the regulation branch road with
The resistance forms a bandwidth-limited circuit.
As further preferred embodiments, above-mentioned mike, wherein：The regulation branch road includes a tune
Economize on electricity hold and one adjust inductance, the regulation resistance with it is described regulation inductance connect, it is described regulation branch road and
The resistance forms a bandwidth-limited circuit.
Mike is formed based on the regulation circuit of mike, the above-mentioned regulation circuit to based on mike
Operation principle is elaborated, is not being repeated herein.
More than above are only preferred embodiments of the present invention, not thereby limit embodiments of the present invention and
Protection domain, to those skilled in the art, should can appreciate that all utilization description of the invention
And the equivalent done by diagramatic content and the scheme obtained by obvious change, should include
Within the scope of the present invention.
Claims (9)
1. a kind of regulation circuit based on mike, it is characterised in that include：
Signal amplification unit, to receive an acoustical signal, is amplified process to the acoustical signal, and
The acoustical signal after processing and amplifying is exported to signal processing unit；
Wherein, the signal amplification unit includes the first amplifier, connects first amplification by a resistance
Second amplifier of device, also adjusts branch road including one, and the regulation branch road is connected to second amplifier
Between publicly.
2. the regulation circuit based on mike according to claim 1, it is characterised in that：Described regulation is propped up
Road includes a regulation electric capacity, and the regulation electric capacity forms high frequency Regulate signal with the resistance.
3. the regulation circuit based on mike according to claim 1, it is characterised in that：Described regulation is propped up
Road includes a regulation electric capacity and one adjusts resistance, the regulation resistance and the regulation resistant series, described
Adjust branch road a first kind frequency compensation signal is formed with the resistance.
4. the regulation circuit based on mike according to claim 1, it is characterised in that：Described regulation is propped up
Road includes a regulation electric capacity and one adjusts inductance, and the regulation resistance is connected with the regulation inductance, described
Adjust branch road an Equations of The Second Kind frequency compensation signal is formed with the resistance.
5. a kind of mike, it is characterised in that：The mike includes that power pins, grounding pin, output are drawn
Foot, also include an adjustment pin.
6. mike according to claim 5, it is characterised in that：The adjustment pin is to connect a tune
Section branch road.
7. mike according to claim 6, it is characterised in that：The regulation branch road includes regulation electricity
Hold, the electric capacity that adjusts forms high frequency Regulate signal with the resistance inside the mike.
8. mike according to claim 7, it is characterised in that：The regulation branch road includes regulation electricity
Hold and one adjust resistance, the regulation resistance and the regulation resistant series, the regulation branch road with it is described
Resistance forms first kind frequency compensation signal.
9. mike according to claim 7, it is characterised in that：The regulation branch road includes regulation electricity
Hold and one adjust inductance, the regulation resistance with it is described regulation inductance connect, it is described adjust branch road with it is described
Resistance forms Equations of The Second Kind frequency compensation signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510698721.9A CN106612472A (en) | 2015-10-23 | 2015-10-23 | Microphone-based regulation circuit and microphone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510698721.9A CN106612472A (en) | 2015-10-23 | 2015-10-23 | Microphone-based regulation circuit and microphone |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106612472A true CN106612472A (en) | 2017-05-03 |
Family
ID=58613114
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510698721.9A Pending CN106612472A (en) | 2015-10-23 | 2015-10-23 | Microphone-based regulation circuit and microphone |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203368756U (en) * | 2013-07-27 | 2013-12-25 | 歌尔声学股份有限公司 | Miniature microphone |
| CN203840514U (en) * | 2014-04-30 | 2014-09-17 | 安百特半导体有限公司 | Active noise abatement circuit for mobile phone |
| CN204272364U (en) * | 2014-10-23 | 2015-04-15 | 北京兴科迪科技有限公司 | A kind of vehicle active silicon microphone control circuit |
| US20150139453A1 (en) * | 2013-11-15 | 2015-05-21 | Kabushiki Kaisha Audio-Technica | Microphone and microphone device |
| CN205123952U (en) * | 2015-10-23 | 2016-03-30 | 钰太芯微电子科技（上海）有限公司 | Regulating circuit and microphone based on microphone |
-
2015
- 2015-10-23 CN CN201510698721.9A patent/CN106612472A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203368756U (en) * | 2013-07-27 | 2013-12-25 | 歌尔声学股份有限公司 | Miniature microphone |
| US20150139453A1 (en) * | 2013-11-15 | 2015-05-21 | Kabushiki Kaisha Audio-Technica | Microphone and microphone device |
| CN203840514U (en) * | 2014-04-30 | 2014-09-17 | 安百特半导体有限公司 | Active noise abatement circuit for mobile phone |
| CN204272364U (en) * | 2014-10-23 | 2015-04-15 | 北京兴科迪科技有限公司 | A kind of vehicle active silicon microphone control circuit |
| CN205123952U (en) * | 2015-10-23 | 2016-03-30 | 钰太芯微电子科技（上海）有限公司 | Regulating circuit and microphone based on microphone |
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