CN207251890U - A kind of microphone and Bluetooth circuit plate of built-in crystal oscillator - Google Patents
A kind of microphone and Bluetooth circuit plate of built-in crystal oscillator Download PDFInfo
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- CN207251890U CN207251890U CN201720922120.6U CN201720922120U CN207251890U CN 207251890 U CN207251890 U CN 207251890U CN 201720922120 U CN201720922120 U CN 201720922120U CN 207251890 U CN207251890 U CN 207251890U
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Abstract
The utility model discloses a kind of microphone and Bluetooth circuit plate of built-in crystal oscillator, including：Acoustics sensing unit, electric signal is converted to for capturing sound；Signal processing unit, is connected with the acoustics sensing unit, is exported after the signal processing for receiving the acoustics sensing unit through one first output pin end；One crystal oscillator unit, for providing the signal of the first setting frequency range；One frequency unit, is connected with the crystal oscillator unit, to being exported after the signal frequency split of the first setting frequency range through one second output pin end.Above-mentioned technical proposal has the following advantages that or beneficial effect：By increasing crystal oscillator frequency, crystal oscillator is integrated into microphone, then is integrated into Bluetooth circuit plate, reduces the area of circuit board, and can meet different configurations.
Description
Technical field
It the utility model is related to field of micro electromechanical technology, more particularly to a kind of microphone and Bluetooth circuit of built-in crystal oscillator
Plate.
Background technology
Bluetooth is as a kind of radiotechnics of holding equipment short haul connection, in our daily life already nowhere
Do not exist, the intelligent hardware devices such as smart mobile phone, Intelligent bracelet, intelligent watch, intelligent desk lamp, intelligent earphone, intelligent electric cooker its
Real transmitted using Bluetooth technology.
In Bluetooth system, mainly include master chip, microphone, crystal oscillator and these parts of antenna, crystal oscillator on circuit board
Reference frequency signal is provided in Bluetooth circuit, is to support wireless blue tooth technology to realize the core element quickly transmitted.It is wireless blue
Most commonly used in tooth is exactly 16MHZ crystal oscillators, with the portable of high-end intellectual product, miniaturization, and ultra-thin small size, increasingly
More users can select the crystal oscillator of smaller package dimension, but crystal oscillator size cannot further contract under existing technical conditions
Small, microphone and antenna also can not be all integrated among master chip, these all have impact on miniaturising for Bluetooth circuit plate,
Constrain further portable electronic product, miniaturization, integrated development trend.
Utility model content
The utility model is directed to the limitation of the prior art, there is provided a kind of microphone and Bluetooth circuit plate of built-in crystal oscillator.
Above-mentioned technical proposal specifically includes：
A kind of microphone of built-in crystal oscillator, including：
Acoustics sensing unit；
Signal processing unit, is connected with the acoustics sensing unit；
One crystal oscillator unit；
One frequency unit, is connected with the crystal oscillator unit, to after the signal frequency split of the first setting frequency range through one
Two output pin ends export.
Preferably, in the microphone of above-mentioned built-in crystal oscillator, the acoustics sensing unit includes a digital microphone or simulation
Microphone.
Preferably, in the microphone of above-mentioned built-in crystal oscillator, the crystal oscillator unit includes a crystal oscillator, one first starting of oscillation
Capacitance, one second starting of oscillation capacitance；
The first starting of oscillation capacitance connection is between the first end of the crystal oscillator and ground terminal；
The second starting of oscillation capacitance connection is between the second end of the crystal oscillator and ground terminal.
Preferably, in the microphone of above-mentioned built-in crystal oscillator, first setting frequency range is the integral multiple of 16MHz, if described
Integral multiple is N, and the value range of N is 2,3,4 ... ....
Preferably, in the microphone of above-mentioned built-in crystal oscillator, the frequency unit uses Fractional-N frequency device, N=2,3,4 ... ....
Preferably, in the microphone of above-mentioned built-in crystal oscillator, connected between the first end of the frequency unit and the crystal oscillator
One phase inverter.
Preferably, in the microphone of above-mentioned built-in crystal oscillator, the acoustics sensing unit includes electret microphone or microcomputer
Electric system microphone.
Preferably, in the microphone of above-mentioned built-in crystal oscillator, the signal processing unit and the crystal oscillator unit, institute
Frequency unit is stated to be integrated on a dedicated IC chip.
A kind of Bluetooth circuit plate, including a microphone；
The microphone uses the microphone of the built-in crystal oscillator described in above-described embodiment.
Preferably, in above-mentioned Bluetooth circuit plate, a master chip and an antenna are further included；
The master chip, the antenna and the microphone are arranged in the Bluetooth circuit plate.
Above-mentioned technical proposal has the following advantages that or beneficial effect：By increasing crystal oscillator frequency, crystal oscillator is integrated into Mike
Wind, then be integrated into Bluetooth circuit plate, the area of circuit board is reduced, and can meet different configurations.
Brief description of the drawings
Upon reading the detailed description of non-limiting embodiments with reference to the following drawings, the utility model and its spy
Sign, shape and advantage will become more apparent.It should be noted that associated components are not drawn to scale in attached drawing, weight
Point is the purport for showing the utility model.
Fig. 1 is a kind of circuit diagram of the microphone of built-in crystal oscillator in the preferred embodiment of the utility model.
Embodiment
The utility model is further described with specific embodiment below in conjunction with the accompanying drawings, but not as this practicality
New restriction.
As shown in Figure 1, in the preferred embodiment of the utility model, a kind of microphone of built-in crystal oscillator, including：
Acoustics sensing unit MIC, electric signal is converted to for capturing sound；
Signal processing unit Amp, is connected with acoustics sensing unit MIC, at the signal for receiving acoustics sensing unit MIC
Exported after reason through one first output pin end OUT1；
One crystal oscillator unit, for providing the signal of the first setting frequency range；
One frequency unit Divider, is connected with crystal oscillator unit, to after the signal frequency split of the first setting frequency range through one
Second output pin end OUT2 is exported.
The main purpose of the utility model is that the first setting frequency range 16MHz for providing crystal oscillator unit passes through frequency dividing
Cells D ivider frequency dividings for 16MHz integral multiple, wherein, the value range of integral multiple N is 2,3,4 ... ..., then by the
Two output pin end OUT2 are exported, and can so cause crystal oscillator X to be integrated into microphone, then are integrated into Bluetooth circuit plate, are reduced
The area of circuit board, and can meet different configurations.
In the preferred embodiment of the utility model, acoustics sensing unit MIC includes a digital microphone or simulation wheat
Gram wind.
In the preferred embodiment of the utility model, crystal oscillator unit includes a crystal oscillator X, one first starting of oscillation capacitance
C1, one second starting of oscillation capacitance C2；
First starting of oscillation capacitance C1 is connected between first end and the ground terminal of crystal oscillator X；
Second starting of oscillation capacitance C2 is connected between second end and the ground terminal of crystal oscillator X.
The effect of first starting of oscillation capacitance C1, one second starting of oscillation capacitance C2 are to make crystal X starting of oscillations.
In the preferred embodiment of the utility model, the first setting frequency range is the integral multiple of 16MHz, if integral multiple N=
2, i.e. the first setting frequency range uses 32MHz.
In the preferred embodiment of the utility model, frequency unit Divider uses Fractional-N frequency device, N=2, and 3,
4 ... ....
In the preferred embodiment of the utility model, one is connected between the first end of frequency unit Divider and crystal oscillator X
Phase inverter INV.
The effect of phase inverter INV is to enable crystal X to continue to produce vibration, and obtains the signal of one second frequency range, the second frequency
The signal of section is simultaneously exported through the second output pin end OUT2.In the preferred embodiment of the utility model, acoustics sensing unit
MIC includes electret microphone or MEMS condenser microphone.
In the preferred embodiment of the utility model, signal processing unit Amp and crystal oscillator unit, frequency unit
Divider is integrated on a dedicated IC chip, reduces the area of microphone so as to ground, and it is empty to leave more wirings
Between, comply with circuit board high density, miniaturization, integrated development trend.
A kind of Bluetooth circuit plate, including a microphone；
Microphone uses the microphone of the built-in crystal oscillator described in above-described embodiment.
In the preferred embodiment of the utility model, a master chip and an antenna are further included；
Master chip, antenna and microphone are arranged in Bluetooth circuit plate, can so obtain highly integrated Bluetooth circuit plate, because
This place reduces the area of Bluetooth circuit plate, realizes and minimizes integrated Bluetooth circuit plate.
It should be appreciated by those skilled in the art that those skilled in the art combine the prior art and above-described embodiment can be with
Realize various change example, such change case has no effect on the substantive content of the utility model, and it will not be described here.
The preferred embodiment to the utility model is described above.It is to be appreciated that the utility model not office
It is limited to above-mentioned particular implementation, wherein the equipment and structure be not described in detail to the greatest extent are construed as using the common side in this area
Formula is practiced；Any those skilled in the art, in the case where not departing from technical solutions of the utility model ambit, all
Technical solutions of the utility model are made with many possible changes and modifications using the methods and technical content of the disclosure above, or
The equivalent embodiment of equivalent variations is revised as, this has no effect on the substantive content of the utility model.Therefore, it is every without departing from this reality
With the content of new technique scheme, according to the technical essence of the utility model to any simple modification made for any of the above embodiments,
Equivalent variations and modification, still fall within technical solutions of the utility model protection in the range of.
Claims (10)
- A kind of 1. microphone of built-in crystal oscillator, it is characterised in that including：Acoustics sensing unit；Signal processing unit, is connected with the acoustics sensing unit；One crystal oscillator unit；One frequency unit, is connected with the crystal oscillator unit, to defeated through one second after the signal frequency split of the first setting frequency range Go out leads ends output.
- 2. the microphone of built-in crystal oscillator as claimed in claim 1, it is characterised in that the acoustics sensing unit includes a numeral Microphone or simulation microphone.
- 3. the microphone of built-in crystal oscillator as claimed in claim 1, it is characterised in that it is brilliant that the crystal oscillator unit includes one Shake, one first starting of oscillation capacitance, one second starting of oscillation capacitance；The first starting of oscillation capacitance connection is between the first end of the crystal oscillator and ground terminal；The second starting of oscillation capacitance connection is between the second end of the crystal oscillator and ground terminal.
- 4. the microphone of built-in crystal oscillator as claimed in claim 1, it is characterised in that first setting frequency range is 16MHz's Integral multiple, if the integral multiple is N, the value range of N is 2,3,4 ... ....
- 5. the microphone of built-in crystal oscillator as claimed in claim 4, it is characterised in that the frequency unit uses Fractional-N frequency device, N =2,3,4 ... ....
- 6. the microphone of crystal oscillator as claimed in claim 3 built-in, it is characterised in that the of the frequency unit and the crystal oscillator A phase inverter is connected between one end.
- 7. the microphone of built-in crystal oscillator as claimed in claim 1, it is characterised in that the acoustics sensing unit includes electret Microphone or MEMS condenser microphone.
- 8. the microphone of built-in crystal oscillator as claimed in claim 1, it is characterised in that the signal processing unit and the crystal Oscillator unit, the frequency unit are integrated on a dedicated IC chip.
- 9. a kind of Bluetooth circuit plate, it is characterised in that including a microphone；The microphone uses the microphone of the built-in crystal oscillator described in any one in claim 1-8.
- 10. Bluetooth circuit plate as claimed in claim 9, it is characterised in that further include a master chip and an antenna；The master chip, the antenna and the microphone are arranged in the Bluetooth circuit plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720922120.6U CN207251890U (en) | 2017-07-27 | 2017-07-27 | A kind of microphone and Bluetooth circuit plate of built-in crystal oscillator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720922120.6U CN207251890U (en) | 2017-07-27 | 2017-07-27 | A kind of microphone and Bluetooth circuit plate of built-in crystal oscillator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207251890U true CN207251890U (en) | 2018-04-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720922120.6U Active CN207251890U (en) | 2017-07-27 | 2017-07-27 | A kind of microphone and Bluetooth circuit plate of built-in crystal oscillator |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107529712A (en) * | 2017-07-27 | 2018-01-02 | 钰太芯微电子科技（上海）有限公司 | A kind of microphone and Bluetooth circuit plate of built-in crystal oscillator |
-
2017
- 2017-07-27 CN CN201720922120.6U patent/CN207251890U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107529712A (en) * | 2017-07-27 | 2018-01-02 | 钰太芯微电子科技（上海）有限公司 | A kind of microphone and Bluetooth circuit plate of built-in crystal oscillator |
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