CN206821012U - A kind of vehicle-mounted MEMS sound pick-ups of two lines - Google Patents
A kind of vehicle-mounted MEMS sound pick-ups of two lines Download PDFInfo
- Publication number
- CN206821012U CN206821012U CN201720121357.4U CN201720121357U CN206821012U CN 206821012 U CN206821012 U CN 206821012U CN 201720121357 U CN201720121357 U CN 201720121357U CN 206821012 U CN206821012 U CN 206821012U
- Authority
- CN
- China
- Prior art keywords
- power
- supply circuit
- vehicle
- output end
- ups
- 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.)
- Withdrawn - After Issue
Links
Landscapes
- Amplifiers (AREA)
Abstract
The utility model provides a kind of vehicle-mounted sound pick-up of two lines, including：One multiplexing pins, for connecting the communication terminal of vehicle signal line；One ground terminal pin, for connecting the ground terminal of vehicle signal line；Power-supply circuit, the input coupling multiplexing pins of power-supply circuit, for being obtained from multiplexing pins and storing electric energy, the output end of power-supply circuit is used to export electric energy；Bias supply, the output end of the input coupling power-supply circuit of bigoted power supply, for receiving the electric energy of power-supply circuit output and exporting an operating voltage in the output end of bias supply；Transducer, its power end are coupled between the output end of bias supply and ground terminal pin；Amplifying unit, its input are coupled to the signal output part of transducer, its output end coupling multiplexing pins, the signal that the signal output part for amplifying transducer exports.Multiplexing pins do order wire simultaneously and power line uses, and have saved the setting of a signal wire, directly the utility model can be installed on into automotive interior.
Description
Technical field
The utility model sound pick-up technical field, it is specifically related to a kind of vehicle-mounted MEMS sound pick-ups of two lines.
Background technology
Upgrading and applications expanding with automotive system, automotive system intelligent requirements more and more higher, so automobile is to wheat
Gram wind has setting demand.But existing vehicle-mounted Mike has a problem that, because the signal wire of automobile is all two line forms
(connection, ground terminal), and the signal wire of MEMS sound pick-ups is typically all three lines (power end, ground terminal, connection) structure, so
In general automobile sound pick-up is applied directly can not install in wiring in onboard system, cause larger inconvenience.
Utility model content
For the above-mentioned problems in the prior art, a kind of vehicle-mounted MEMS sound pick-ups of two lines, Ke Yizhi are now aimed to provide
Scoop out with being arranged in onboard system, to solve the above problems.
Concrete technical scheme is as follows：
A kind of vehicle-mounted MEMS sound pick-ups of two lines, including：
One multiplexing pins, for connecting the communication terminal of vehicle signal line；
One ground terminal pin, for connecting the ground terminal of vehicle signal line；
Power-supply circuit, the input of the power-supply circuit couple the multiplexing pins, for being obtained from the multiplexing pins
And electric energy is stored, the output end of the power-supply circuit is used to export the electric energy；
Bias supply, the input of the bigoted power supply couple the output end of the power-supply circuit, for receiving described take
The electric energy of electric circuit output simultaneously exports an operating voltage in the output end of the bias supply；
Transducer, its power end are coupled between the output end of the bias supply and the ground terminal pin, for by sound
Sound signal is converted into electric signal；
Control unit, its input are coupled to the signal output part of the transducer, and its output end coupling multiplexing is drawn
Pin, the signal that the signal output part for amplifying the transducer exports.
Further, described sound pick-up is MEMS sound pick-ups.
Further, described control unit, including amplifier, the input of the amplifier are coupled to the transducer
Signal output part；
Voltage follower, the input of the voltage follower are coupled to the output end of the amplifier, its output end coupling
It is connected to the multiplexing pins.
Further, described amplifier is AFE amplifiers.
Further, described voltage follower is source with output voltage follower.
Further, the power end of the amplifier is coupled to the output end of the power-supply circuit, passes through power taking electricity
Road powers.
Further, described control unit couples the output end of the power-supply circuit and powered by the power-supply circuit.
Further, the power-supply circuit is output voltage 3.3V power-supply circuit.
Further, in addition to package casing, the power-supply circuit, bias supply, control unit and transducer are respectively provided with
Inside the package casing, the multiplexing pins and the ground terminal pin extend to the encapsulation inside the package casing
Housing exterior.
Further, the power-supply circuit includes pressure unit, and the pressure unit is used to reduce the multiplexing pins extremely
The voltage of the output end of the power-supply circuit.
The good effect of above-mentioned technical proposal is：
Above-mentioned vehicle-mounted sound pick-up, power taking, the directly communication to vehicle signal line are carried out to communication terminal by power-supply circuit
End carries out power taking, and the electric energy of conversion is fed directly to corresponding power input, and corresponding to the output end of multiplexing pins is coupled to
The signal output part of transducer, multiplexing pins do order wire simultaneously and power line uses, and have saved the setting of a signal wire, directly
Automotive interior can be installed on by the utility model by connecing.
Brief description of the drawings
Fig. 1 is a kind of structure chart of the embodiment of the vehicle-mounted MEMS sound pick-ups of two lines of the present utility model；
In accompanying drawing：100th, package casing；101st, power-supply circuit；102nd, bias supply；103rd, transducer；104th, amplifier；
105th, voltage follower；110th, multiplexing pins；120th, ground terminal pin.
Embodiment
In order that technological means, creation characteristic, reached purpose and effect that the utility model is realized are easy to understand, with
Lower embodiment combination accompanying drawing 1 is specifically addressed to technical scheme provided by the utility model, but herein below is not as this practicality
New restriction.
A kind of vehicle-mounted MEMS sound pick-ups of two lines, including：
One multiplexing pins 110, for connecting the communication terminal of vehicle signal line；
One ground terminal pin 120, for connecting the ground terminal of vehicle signal line；
Power-supply circuit 101, the input coupling multiplexing pins 110 of power-supply circuit 101, for being obtained from multiplexing pins 110
And electric energy is stored, the output end of power-supply circuit 101 is used to export electric energy；The power taking electricity that power-supply circuit 101 is output voltage 3.3V
Road 101.Bias supply 102, the output end of the input coupling power-supply circuit 101 of bigoted power supply, for receiving power-supply circuit 101
The electric energy of output simultaneously exports an operating voltage in the output end of bias supply 102；For exporting a bias voltage, for changing
Energy device 103 is powered.Power-supply circuit 101 includes pressure unit, and pressure unit is used to reduce multiplexing pins 110 to power-supply circuit 101
Output end voltage.
Transducer 103, its power end are coupled between the output end of bias supply 102 and ground terminal pin 120；Sound pick-up
For MEMS sound pick-ups.At present, most of sound pick-ups of actual use are all ECM (electret capacitor) sound pick-ups, this technology
There is the history of decades.ECM operation principle is to utilize the polymeric material vibrating membrane for having permanent charge stationed.With gathering for ECM
Condensation material vibrating membrane is compared, and the performance of MEMS sound pick-ups at different temperatures is all sufficiently stable, its sensitiveness will not by temperature, shake
Dynamic, humidity and the influence of time.Because heat resistance is strong, MEMS sound pick-ups can bear 260 DEG C of high temperature reflux weldering, and performance will not
There is any change.Because assembling context sensitive varies less, the audio debugging cost that can also be saved in manufacturing process.So
Compared to the existing sound pick-up of in the market (ECM sound pick-ups), its sensitiveness will not be influenceed by temperature, vibration, humidity and time.
Complex environment is applicable, is more adapted to use on automobile.MEMS is that microelectric technique and mechanical engineering are fused into one
A kind of industrial technology risen, its opereating specification is in micrometer range.It is smaller than it, in the similar technology quilt of nanometer range
Referred to as nano electromechanical systems.
Control unit, its input are coupled to the signal output part of transducer 103, its output end coupling multiplexing pins 110,
The signal that signal output part for amplifying transducer 103 exports.
Control unit, including amplifier 104, the input of amplifier 104 are coupled to the signal output part of transducer 103；
Amplifier 104 is AFE amplifiers 104.The power end of amplifier 104 is coupled to the output end of power-supply circuit 101, passes through power taking electricity
Road 101 powers.AFE is a low cost, and integrated-type, power line communication (PLC) AFE(analog front end) (AFE) device, this device can
Electric capacity or the transformer coupled company to power line are realized under a digital signal processor (DSP) either microprocessor control
Connect.This device is very suitable for driving and requires to provide highest 1.0A low impedance path for reactive load.This integrated-type receives
Device is able to detect that minimum 20 μ V signal and supports the gain option of wider range to adapt to different input signal situations.
This single-chip integration type circuit provides high reliability for power line communication application.
Voltage follower 105, the input of voltage follower 105 are coupled to the output end of amplifier 104, its output end coupling
It is connected to multiplexing pins 110.Voltage follower 105 for source with output voltage follower 105.Its output voltage is to follow power supply
The change of voltage and change, i.e., if supply voltage is 8V, then actual voltage then changes to transmit between 11.3V or 8V
Logical signal, realize the effect of a signal transmission.
Control unit couples the output end of power-supply circuit 101 and powered by power-supply circuit 101.
Also include package casing 100, power-supply circuit 101, bias supply 102, control unit and transducer 103 may be contained within
Inside package casing 100, multiplexing pins 110 and ground terminal pin 120 are extended to inside package casing 100 outside package casing 100
Portion.
The utility model preferred embodiment is these are only, not thereby limits embodiment of the present utility model and protection
Scope, to those skilled in the art, it should can appreciate that all with the utility model specification and diagramatic content institute
Scheme obtained by the equivalent substitution made and obvious change, should be included in the scope of protection of the utility model
It is interior.
Claims (9)
- A kind of 1. vehicle-mounted MEMS sound pick-ups of two lines, it is characterised in that including：One multiplexing pins, for connecting the communication terminal of vehicle signal line；One ground terminal pin, for connecting the ground terminal of vehicle signal line；Power-supply circuit, the input of the power-supply circuit couples the multiplexing pins, for obtaining and depositing from the multiplexing pins Storing up electricity energy, the output end of the power-supply circuit are used to export the electric energy；Bias supply, the input of the bias supply couple the output end of the power-supply circuit, for receiving the power taking electricity The electric energy of road output simultaneously exports an operating voltage in the output end of the bias supply；Transducer, its power end is coupled between the output end of the bias supply and the ground terminal pin, for sound to be believed Number it is converted into electric signal；Control unit, its input are coupled to the signal output part of the transducer, and its output end couples the multiplexing pins, use In the signal for the signal output part output for amplifying the transducer.
- A kind of 2. vehicle-mounted MEMS sound pick-ups of two line according to claim 1, it is characterised in thatDescribed control unit, including amplifier, the input of the amplifier are coupled to the signal output part of the transducer；Voltage follower, the input of the voltage follower are coupled to the output end of the amplifier, and its output end is coupled to The multiplexing pins.
- 3. the vehicle-mounted MEMS sound pick-ups of a kind of two line according to claim 2, it is characterised in that described amplifier is AFE Amplifier.
- 4. the vehicle-mounted MEMS sound pick-ups of a kind of two line according to claim 2, it is characterised in that described voltage follower is Source is with output voltage follower.
- A kind of 5. vehicle-mounted MEMS sound pick-ups of two line according to claim 2, it is characterised in that the power end of the amplifier The output end of the power-supply circuit is coupled to, is powered by the power-supply circuit.
- 6. the vehicle-mounted MEMS sound pick-ups of a kind of two line according to claim 1, it is characterised in that described control unit couples institute State the output end of power-supply circuit and powered by the power-supply circuit.
- 7. the vehicle-mounted MEMS sound pick-ups of a kind of two line according to claim 1, it is characterised in that the power-supply circuit is output Voltage 3.3V power-supply circuit.
- 8. the vehicle-mounted MEMS sound pick-ups of a kind of two line according to claim 1, it is characterised in that also including package casing, institute State power-supply circuit, bias supply, control unit and transducer to may be contained within inside the package casing, the multiplexing pins and institute Ground terminal pin is stated to extend to inside the package casing outside the package casing.
- 9. the vehicle-mounted MEMS sound pick-ups of a kind of two line according to claim 1, it is characterised in that the power-supply circuit includes drop Unit is pressed, the pressure unit is used to reduce the multiplexing pins to the voltage of the output end of the power-supply circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720121357.4U CN206821012U (en) | 2017-02-09 | 2017-02-09 | A kind of vehicle-mounted MEMS sound pick-ups of two lines |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720121357.4U CN206821012U (en) | 2017-02-09 | 2017-02-09 | A kind of vehicle-mounted MEMS sound pick-ups of two lines |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206821012U true CN206821012U (en) | 2017-12-29 |
Family
ID=60750706
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720121357.4U Withdrawn - After Issue CN206821012U (en) | 2017-02-09 | 2017-02-09 | A kind of vehicle-mounted MEMS sound pick-ups of two lines |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206821012U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108377435A (en) * | 2018-03-23 | 2018-08-07 | 钰太芯微电子科技（上海）有限公司 | A kind of twin wire microphone with ultrasonic wave identification |
-
2017
- 2017-02-09 CN CN201720121357.4U patent/CN206821012U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108377435A (en) * | 2018-03-23 | 2018-08-07 | 钰太芯微电子科技（上海）有限公司 | A kind of twin wire microphone with ultrasonic wave identification |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108768310B (en) | Low-noise charge amplifier for piezoelectric sensor and implementation method thereof | |
| CN203368756U (en) | Miniature microphone | |
| CN206821012U (en) | A kind of vehicle-mounted MEMS sound pick-ups of two lines | |
| CN105197001B (en) | Vacuum pump of electric automobile controller | |
| CN201112532Y (en) | Battery electric quantity remote prompting apparatus | |
| SG93284A1 (en) | Transducer interface arrangement including a sigma-delta modulator with offset correction and with gain setting | |
| CN103675317B (en) | A kind of low-power consumption servo circuit for quartz flexible accelerometer | |
| CN208539813U (en) | A kind of motor speed closed-loop control system | |
| CN108419192A (en) | A kind of vehicle-mounted MEMS sound pick-ups of two lines | |
| CN208656723U (en) | A kind of low-noise charge amplifier for piezoelectric transducer | |
| CN201122111Y (en) | Sensibility-adjustable vibration transducer | |
| CN208206291U (en) | A kind of wireless collection device and oil well wireless vibration monitor system | |
| CN202940789U (en) | Frequency current isolation conversion module | |
| CN203812008U (en) | Analog signal collector | |
| CN201357714Y (en) | Tire pressure warner | |
| CN205038006U (en) | Pressure collecting circuit of constant current source driving pressure sensor | |
| CN101350598B (en) | Two-way feedback single-power supply audio power amplifier | |
| CN203984359U (en) | A kind of onboard audio power amplification circuit | |
| CN107453754A (en) | Positive pressure of shock wave signal condition system | |
| CN202948136U (en) | Remote and wireless collecting device for acoustic emission signal | |
| CN201382007Y (en) | Control circuit for stabilizing wind speed of blast blower | |
| CN207677695U (en) | A kind of operational amplifier integrating termination power and feedback circuit | |
| CN219714541U (en) | Signal processing circuit of vibration sensor | |
| CN104010260A (en) | Two-line MEMS microphone | |
| CN204740258U (en) | Electronic round of tipper yaw velocity multiple spot measuring device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20171229 Effective date of abandoning: 20230725 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20171229 Effective date of abandoning: 20230725 |
|
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |