CN208353533U - A kind of microphone circuit and the earphone with decrease of noise functions - Google Patents
A kind of microphone circuit and the earphone with decrease of noise functions Download PDFInfo
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- CN208353533U CN208353533U CN201820247261.7U CN201820247261U CN208353533U CN 208353533 U CN208353533 U CN 208353533U CN 201820247261 U CN201820247261 U CN 201820247261U CN 208353533 U CN208353533 U CN 208353533U
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Abstract
The utility model provides a kind of microphone circuit and the earphone with decrease of noise functions, including microphone branch one microphone transducer of road connection, microphone transducer connect an Input voltage terminal and ground terminal；Fixed current branch is connect with microphone branch circuit parallel connection, including digital signal processor with the signal output end of microphone transducer；Power supervisor is connect with Input voltage terminal and digital signal processor, and power supervisor further includes current monitoring module.The technical solution of the utility model beneficial effect is: using digital signal processor, handles the output signal of microphone transducer, and carry out drawing signal that is strong and inhibiting other sections to the signal of setting frequency range range, to realize decrease of noise functions；Using power supervisor, decompression is carried out to input voltage, constant electric current is provided for digital signal processor, and be provided with current monitoring module, real-time perfoming compensates current difference, so that total current keeps stablizing.
Description
Technical field
The utility model relates to micro-electromechanical device technical field more particularly to a kind of microphone circuit and there is decrease of noise functions
Earphone.
Background technique
Line control earphone (Wire headset) refers to that the earphone that access device can be controlled on earphone cable, such as control access are set
Standby power on/off function, broadcasting and stop function, volume regulatory function etc..
The microphone and mouth that traditional line control earphone is arranged after being worn on human body ear are the positions in parallel lines,
Since microphone is omnidirectional, there are the following problems in actual application process: in a noisy environment, by noisy background
Sound also captures together；It is easy by noises such as external disturbances, such as clothes grating, sound of the wind, in the process talked with other side
In, the chat script so that other side can not hear clearly.
Summary of the invention
For the above-mentioned problems in the prior art, a kind of microphone circuit and the ear with decrease of noise functions are now provided
Machine.
Specific technical solution is as follows:
A kind of microphone circuit is applied to line control earphone, including:
One microphone branch, one microphone transducer of the microphone branch road connection, the microphone transducer connection
One Input voltage terminal and ground terminal；
One fixed current branch, with the microphone branch circuit parallel connection, comprising:
Digital signal processor is connect with the signal output end of the microphone transducer；
Power supervisor is connect with the Input voltage terminal and the digital signal processor, and the power supervisor is also
Including current monitoring module.
Preferably, the power supervisor includes BUCK power adapter or linear voltage regulator or charge pump circuit.
Preferably, the digital signal processor includes:
One frequency unit；
One dynamic range control unit, connect with the frequency unit.
Preferably, total current margin of the microphone branch and the fixed current branch be 180 microamperes extremely
360 microamperes.
Preferably, the electric current of the microphone branch is 80 microamperes.
A kind of earphone with decrease of noise functions, including microphone circuit described in above-mentioned any one.
Preferably, including an earphone interface connector, it is connect with outer audio equipment, the earphone interface connector packet
It includes:
First interface connects the microphone circuit；
Second interface connects ground terminal；
Third interface connects the right channel loudspeaker；
4th interface connects the left channel loudspeaker.
Preferably, the earphone interface connector puts in order as first interface, second interface, third interface, the 4th
Interface.
Preferably, the earphone interface connector puts in order as second interface, first interface, third interface, the 4th
Interface.
The technical solution of the utility model beneficial effect is: digital signal processor is used, to microphone transducer
Output signal is handled, and carries out drawing signal that is strong and inhibiting other sections to the signal of setting frequency range range, to realize drop
It makes an uproar function；Using power supervisor, decompression is carried out to input voltage, constant electric current is provided for digital signal processor, and is arranged
There is current monitoring module, real-time perfoming compensates current difference, so that total current keeps stablizing.
Detailed description of the invention
With reference to appended attached drawing, more fully to describe the embodiments of the present invention.However, appended attached drawing is only used for
Bright and elaboration, does not constitute the limitation to the scope of the utility model.
Fig. 1 is the overall structure figure about microphone circuit in the embodiments of the present invention；
Fig. 2 is the structural block diagram about power supervisor in the embodiments of the present invention；
Fig. 3 is the structural block diagram about digital signal processor in the embodiments of the present invention；
Fig. 4 is the overall structure figure about the earphone with decrease of noise functions in the embodiments of the present invention.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are in the premise for not making creative work
Under all other embodiment obtained, fall within the protection scope of the utility model.
It should be noted that in the absence of conflict, the feature in the embodiments of the present invention and embodiment can
To be combined with each other.
The utility model is described in further detail in the following with reference to the drawings and specific embodiments, but not as the utility model
It limits.
A kind of microphone circuit 1 is applied to line control earphone, including:
One microphone branch 10, a microphone transducer 100 is connected on microphone branch 10, and microphone transducer 100 connects
Meet an Input voltage terminal Vin and ground terminal GND；
One fixed current branch 11, it is in parallel with microphone branch 10, comprising:
Digital signal processor 110 is connect with the signal output end MIC of microphone transducer 100；
Power supervisor 111 is connect with Input voltage terminal Vin and digital signal processor 110, power supervisor 111 is also
Including current monitoring module 1110.
By the technical solution of above-mentioned microphone circuit, as shown in Figure 1, microphone circuit 1 divide for microphone branch 10 with
Fixed current branch 11, microphone transducer 100 sense audio signal and are converted to output electric signal, the microphone branch 10 at place
On electric current be dynamic；
Further, digital signal processor 110 and power supervisor 111, number letter are set on fixed current branch 11
The effect of number processor 110 is handled the output signal of microphone transducer 100, and the effect of power supervisor 111 is
It will power after the voltage step-down of Input voltage terminal Vin to digital signal processor 110, and a current monitoring module be set
1110, as shown in Fig. 2, compensating fixed current branch when the consumption electric current of digital signal processor 111 is lower than a given threshold
11 total current keeps stablizing, or when the consumption electric current of digital signal processor 110 is too low, can compensate total current, so that
Electric current on fixed current branch 11 in parallel is constant, so that total current keeps stablizing.
In a kind of preferably embodiment, power supervisor 111 includes BUCK power adapter or linear voltage regulator or electricity
Lotus pump circuit.
Specifically, BUCK power adapter be by after the voltage step-down of Input voltage terminal Vin give digital signal processor 110
Power supply, belongs to the switched mode power converter of the decompression transformation of DC to DC；Linear voltage regulator is from Input voltage terminal Vin's
After the voltage for subtracting excess in input voltage, the output voltage of adjusting is powered to digital signal processor 110；Charge pump circuit
The process that voltage is equivalent to charge and discharge is provided, capacitor charging is given first, the charge being charged into is isolated after the completion, is then connected
Digital signal processor 110 is connect, the charge being isolated just now is transmitted.
It should be noted that BUCK power adapter, linear voltage regulator, charge pump circuit should all the art, to number
The process that word signal processor 110 is powered, details are not described herein.
In a kind of preferably embodiment, digital signal processor 110 includes:
One frequency unit 1100；
One dynamic range control unit 1101, connect with frequency unit 1100.
Specifically, as shown in figure 3, digital signal processor 110 passes through frequency unit 1100 and dynamic range control respectively
The signal of microphone transducer 100 is divided into N segment signal according to audio section by unit 1101, frequency unit 1100, N be more than or equal to
2 positive integer, dynamic range control unit 1101 be the dynamic range of the input voltage of Input voltage terminal Vin is mapped to it is specified
Dynamic range in, controlled using auto gain control method, dynamic range control unit 1101 is to Input voltage terminal Vin
Input voltage signal can carry out whole dynamic range control, several subbands can also be divided into, and to each subband point
It carry out not dynamic range control；
Further, the signal of microphone transducer 100 is divided into N sections of letters according to audio section by frequency unit 1100 first
Number, respectively B1-Bn, N or n are the positive integer more than or equal to 2, and each section of electric signal can make M response signal；
Further, such as the audio signal of setting people relatively concentrates between B5-B9 sections, carries out to each section of electric signal
Control, and selected B5-B9 sections of signal is carried out to draw signal that is strong and inhibiting other sections, to meet the sense of hearing requirement of people, phase
When the mode in bandpass filter can be tracked dynamically, further such that microphone circuit 1 can be realized decrease of noise functions.
It should be noted that dynamic range control unit 1101, which passes through the control chip substituted in the prior art, realizes dynamic
Scope control, details are not described herein.
In a kind of preferably embodiment, microphone branch 10 and total current margin of fixed current branch 11 are
180 microamperes to 360 microamperes.
In a kind of preferably embodiment, the electric current of microphone branch 10 is 80 microamperes.
Specifically, Android system and normalized current as defined in IOS system are 180 microamperes to 360 microamperes, are further explained
Microphone circuit 1 is adapted to Android system and IOS system, and wherein microphone branch 10 efficiently uses 80 micro-ampere currents.
A kind of earphone 2 with decrease of noise functions, including the microphone circuit 1 of above-mentioned any one.
In a kind of preferably embodiment, including an earphone interface connector 20, it is connect with outer audio equipment 3, earphone
Interface connector 20 includes:
First interface 200 connects microphone circuit 1；
Second interface 201 connects ground terminal GND；
Third interface 202 connects right channel loudspeaker 21；
4th interface 203 connects left channel loudspeaker 22.
In a kind of preferably embodiment, earphone interface connector 20 puts in order as first interface 200, second interface
201, third interface 202, the 4th interface 203.
In a kind of preferably embodiment, earphone interface connector 20 puts in order as second interface 201, first interface
200, third interface 202, the 4th interface 203.
By the technical solution of the above-mentioned earphone with decrease of noise functions, as shown in figure 4, microphone circuit 1 effectively combines ear
Machine interface connector 20 passes through the first interface 200 of earphone interface connector 20, second interface 201, third interface 202 and
Four interfaces 203 are connected with right channel loudspeaker 21 and the left channel loudspeaker 22 of earphone, to form with decrease of noise functions
Earphone 2, so that earphone 2 can be realized decrease of noise functions.
The technical solution of the utility model beneficial effect is: digital signal processor is used, to microphone transducer
Output signal is handled, and carries out drawing signal that is strong and inhibiting other sections to the signal of setting frequency range range, to realize drop
It makes an uproar function；Using power supervisor, decompression is carried out to input voltage, constant electric current is provided for digital signal processor, and is arranged
There is current monitoring module, real-time perfoming compensates current difference, so that total current keeps stablizing.
The foregoing is merely the utility model preferred embodiment, be not intended to limit the embodiments of the present invention and
Protection scope should can appreciate that all in the utility model specification and diagram to those skilled in the art
Hold made equivalent replacement and obviously change obtained scheme, the protection model of the utility model should all be included in
In enclosing.
Claims (9)
1. a kind of microphone circuit, which is characterized in that be applied to line control earphone, comprising:
One microphone branch, one microphone transducer of the microphone branch road connection, the microphone transducer connection one are defeated
Enter voltage end and ground terminal；
One fixed current branch, with the microphone branch circuit parallel connection, comprising:
Digital signal processor is connect with the signal output end of the microphone transducer；
Power supervisor, connecting the power supervisor with the Input voltage terminal and the digital signal processor further includes electricity
Flow monitoring modular.
2. microphone circuit according to claim 1, which is characterized in that the power supervisor includes the conversion of BUCK power supply
Device or linear voltage regulator or charge pump circuit.
3. microphone circuit according to claim 1, which is characterized in that the digital signal processor includes:
One frequency unit；
One dynamic range control unit, connect with the frequency unit.
4. microphone circuit according to claim 1, which is characterized in that the microphone branch and the fixed current branch
Total current margin on road is 180 microamperes to 360 microamperes.
5. microphone circuit according to claim 1, which is characterized in that the electric current of the microphone branch is 80 microamperes.
6. a kind of earphone with decrease of noise functions, which is characterized in that including Mike's wind-powered electricity generation described in claim 1-3 any one
Road.
7. the earphone according to claim 6 with decrease of noise functions, which is characterized in that including an earphone interface connector,
It is connect with outer audio equipment, the earphone interface connector includes:
First interface connects the microphone circuit；
Second interface connects ground terminal；
Third interface connects right channel loudspeaker；
4th interface connects left channel loudspeaker.
8. the earphone according to claim 7 with decrease of noise functions, which is characterized in that the row of the earphone interface connector
Column sequence is first interface, second interface, third interface, the 4th interface.
9. the earphone according to claim 7 with decrease of noise functions, which is characterized in that the row of the earphone interface connector
Column sequence is second interface, first interface, third interface, the 4th interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820247261.7U CN208353533U (en) | 2018-02-11 | 2018-02-11 | A kind of microphone circuit and the earphone with decrease of noise functions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820247261.7U CN208353533U (en) | 2018-02-11 | 2018-02-11 | A kind of microphone circuit and the earphone with decrease of noise functions |
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| Publication Number | Publication Date |
|---|---|
| CN208353533U true CN208353533U (en) | 2019-01-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820247261.7U Active CN208353533U (en) | 2018-02-11 | 2018-02-11 | A kind of microphone circuit and the earphone with decrease of noise functions |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108235173A (en) * | 2018-02-11 | 2018-06-29 | 钰太芯微电子科技（上海）有限公司 | A kind of microphone circuit and the earphone with decrease of noise functions |
-
2018
- 2018-02-11 CN CN201820247261.7U patent/CN208353533U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108235173A (en) * | 2018-02-11 | 2018-06-29 | 钰太芯微电子科技（上海）有限公司 | A kind of microphone circuit and the earphone with decrease of noise functions |
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