CN207939738U - A kind of microphone state detection circuit and vehicle multi-media player - Google Patents
A kind of microphone state detection circuit and vehicle multi-media player Download PDFInfo
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- CN207939738U CN207939738U CN201820384092.1U CN201820384092U CN207939738U CN 207939738 U CN207939738 U CN 207939738U CN 201820384092 U CN201820384092 U CN 201820384092U CN 207939738 U CN207939738 U CN 207939738U
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Abstract
A kind of microphone state detection circuit of the embodiments of the present invention offer and vehicle multi-media player, are related to mobile unit technical field, for detecting microphone state without using IC is internally integrated.The circuit includes：First control unit, the second control unit and voltage detection unit；First control unit under the control of the voltage of control node for controlling being turned on or off for power voltage terminal and microphone access interface, second control unit is used under the control of the voltage of control voltage end be turned on or off control node and the first level terminal, and voltage detection unit is used to detect the voltage at voltage detecting end and determines the state of the accessed microphone of microphone access interface according to the voltage at voltage detecting end.The embodiments of the present invention are detected for microphone state.
Description
Technical field
The utility model is related to mobile unit technical field more particularly to a kind of microphone state detection circuits and vehicle-mounted more
Media player.
Background technology
Microphone is also known as microphone, is a kind of device being used for picking up and transmitting sound, can convert voice signal
For electric signal.The functions such as voice communication, speech recognition may be implemented by microphone, therefore microphone is in current electronic device
Use it is very extensive.
Under normal circumstances, electronic equipment is required to detect the state of microphone, such as：Open circuit, short circuit, normal work
Etc. states, while also to meet over the ground, to the short circuit requirement of power supply, allow user or repairman that can judge that electronics is set quickly
Standby working condition, in favor of improving property easy to use.Generally by integrated chip to the shape of microphone in conventional electronic devices
State is detected, however integrated chip has been internally integrated DC/DC converters and provides operating voltage for it, and DC/DC converter meetings
The other equipments such as radio are interfered.
Utility model content
A kind of microphone state detection circuit of the embodiments of the present invention offer and vehicle multi-media player, are used for
Microphone state is detected in the case of without using the integrated IC for being internally integrated DC/DC converters.
In order to achieve the above objectives, the embodiments of the present invention adopt the following technical scheme that：
In a first aspect, a kind of microphone state detection circuit is provided, including：First control unit, the second control unit with
And voltage detection unit；
The first end of first control unit connects power voltage terminal by first resistor, first control unit
Second end connects microphone access interface by second resistance, and the control terminal of first control unit connects control node；Institute
The first control unit is stated for controlling the power voltage terminal and the microphone under the control of the voltage of the control node
Access interface is turned on or off；
The first end of second control unit connects the control node by 3rd resistor end, and passes through described the
One resistance, the 3rd resistor and the 4th resistance connect the power voltage terminal, the second end connection of second control unit
First level terminal, the control terminal connection control voltage end of second control unit, second control unit are used for described
Control be turned on or off under the control of the voltage of the voltage end control node and first level terminal；
The voltage detection unit connects first end, first level terminal and the voltage inspection of first control unit
End is surveyed, the voltage for detecting the voltage detecting end simultaneously determines that the microphone accesses according to the voltage at the voltage detecting end
The state of the accessed microphone in port.
Optionally, first control unit is metal-oxide semiconductor (MOS) metal-oxide-semiconductor；
The first end of first control unit is the source electrode of the metal-oxide-semiconductor, and the second end of first control unit is
The drain electrode of the metal-oxide-semiconductor, the control terminal of first control unit are the grid of the metal-oxide-semiconductor.
Optionally, the metal-oxide-semiconductor is P-channel metal-oxide-semiconductor.
Optionally, second control unit is switching transistor；
The first end of second control unit is the first pole of the switching transistor, the of second control unit
Two ends are the second pole of the switching transistor, and the control terminal of second control unit is the grid of the switching transistor.
Optionally, the switching transistor is N-type switching transistor.
Optionally, the voltage detection unit includes：5th resistance and the 6th resistance；
The first end of 5th resistance connects the first end of first control unit, the second end of the 5th resistance
Connect the voltage detecting end；
The first end of 6th resistance connects the voltage detecting end, the second end connection of the 6th resistance described the
One level terminal.
Optionally, the microphone state detection circuit further includes：Processor；
The voltage detecting end and the control voltage end are connected to the processor, and the processor is used for according to institute
The voltage for stating voltage detecting end adjusts the voltage of the control voltage end.
Optionally, which is characterized in that the microphone state detection circuit further includes：Safety element；
The safety element is series between the power voltage terminal and the first resistor.
The optional first level terminal ground connection.
Second aspect provides a kind of vehicle multi-media player, including first aspect any one of them microphone state
Detection circuit.
The microphone state detection circuit that the utility model embodiment provides, including：First control unit, the second control are single
Member and voltage detection unit；Wherein, first control unit can control under the control of the voltage of the control node
The power voltage terminal is turned on or off with the microphone access interface, and second control unit can be in the control
The control node that is turned on or off under the control of the voltage of voltage end and first level terminal, the voltage detection unit can
To detect the voltage at the voltage detecting end and determine the microphone access interface institute according to the voltage at the voltage detecting end
Access the state of microphone.The state that can determine microphone i.e. in the embodiment of the present application according to the voltage at voltage detecting end, because
This embodiment of the present application provides a kind of detection microphone shape in the case of not using the integrated IC for being internally integrated DC/DC converters
The circuit of state.
Description of the drawings
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, other drawings may also be obtained based on these drawings.
Fig. 1 is the schematic diagram for the microphone state detection circuit that the utility model embodiment provides；
Fig. 2 is one of the circuit diagram for the microphone state detection circuit that the utility model embodiment provides；
Fig. 3 is one of the current flow diagrams for the microphone state detection circuit that the utility model embodiment provides；
Fig. 4 is the two of the current flow diagrams for the microphone state detection circuit that the utility model embodiment provides；
Fig. 5 is the three of the current flow diagrams for the microphone state detection circuit that the utility model embodiment provides；
Fig. 6 is the two of the circuit diagram for the microphone state detection circuit that the utility model embodiment provides；
Fig. 7 is the three of the circuit diagram for the microphone state detection circuit that the utility model embodiment provides.
Specific implementation mode
Below in conjunction with the attached drawing in the embodiment of the present application, technical solutions in the embodiments of the present application carries out clear, complete
Site preparation describes, it is clear that described embodiment is some embodiments of the present application, instead of all the embodiments.Based on this Shen
Please in embodiment, the every other implementation that those of ordinary skill in the art are obtained without creative efforts
Example, shall fall in the protection scope of this application.
Term " first " and " second " in the description and claims of this application etc. are for distinguishing different pairs
As, rather than for the particular order of description object.For example, first antenna and the second antenna etc. are for distinguishing different days
Line, rather than the particular order for describing antenna.
In the embodiment of the present application, " illustrative " or " such as " etc. words for indicate make example, illustration or explanation.This
Application embodiment in be described as " illustrative " or " such as " any embodiment or design scheme be not necessarily to be construed as comparing
Other embodiments or design scheme more preferably or more advantage.Specifically, use " illustrative " or " such as " etc. words purport
Related notion is being presented in specific ways.In addition, in the description of the embodiment of the present application, unless otherwise indicated, " multiples' " contains
Justice refers to two or more.
The transistor used in all embodiments of the utility model all can be thin film transistor (TFT) or field-effect tube or other
The identical device of characteristic predominantly switchs brilliant according to transistor used by effect the embodiments of the present invention in circuit
Body pipe.Since the source electrode of the switching transistor used here, drain electrode are symmetrical, so its source electrode, drain electrode can be interchanged.
In the utility model embodiment, to distinguish the two poles of the earth of transistor in addition to grid, wherein it will be known as the first pole by source electrode, drain electrode claims
For the second pole.Provide that the intermediate ends of transistor are grid, input signal end is source electrode, output signal end is by the form in attached drawing
Drain electrode.In addition switching transistor used by the utility model embodiment includes p-type switching transistor and N-type switching transistor two
Kind, wherein p-type switching transistor is connected when grid is low level, ends when grid is high level, N-type switching transistor
To be connected when grid is high level, end when grid is low level.
Generally the state of microphone is detected by integrated chip in conventional electronic devices, however integrated chip needs
Operating voltage is provided for it by the DC/DC converters being internally integrated, and DC/DC converters can make the other equipments such as radio
At interference.
In order to solve this problem, a kind of microphone state detection circuit of the embodiment of the present application offer and vehicle mounted multimedia play
Device, the microphone state detection circuit include：First control unit, the second control unit and voltage detection unit；Wherein, institute
The power voltage terminal and the microphone can be controlled under the control of the voltage of the control node by stating the first control unit
Access interface is turned on or off, second control unit can it is described control voltage end voltage control under be connected or
The control node and first level terminal are disconnected, the voltage detection unit can detect the voltage at the voltage detecting end
And the state of the accessed microphone of microphone access interface is determined according to the voltage at the voltage detecting end.I.e. the application is real
The state of microphone can be determined according to the voltage at voltage detecting end by applying in example, therefore the embodiment of the present application provides one kind and do not make
With the circuit for detecting microphone state in the case of the integrated IC for being internally integrated DC/DC converters.
Above-mentioned the embodiment of the present application is described in detail below, shown referring to Fig.1, Mike provided by the embodiments of the present application
Wind state detection circuit, including：First control unit 11, the second control unit 12 and voltage detection unit 13.
The first end 11a of first control unit 11 is by first resistor R1 connection power voltage terminals VCC, and described first
The second end 11b of control unit 11 passes through second resistance R2 connection microphone access interface MIC+, first control unit 11
Control terminal 11c connection control nodes a；First control unit 11 is used under the control of the voltage of the control node a
Control being turned on or off for the power voltage terminal VCC and microphone access interface MIC+.
The first end 12a of second control unit 12 connects the control node a, Yi Jitong by the ends 3rd resistor R3
Cross the first resistor R1, the 3rd resistor R3 and the 4th resistance R4 connections power voltage terminal VCC, second control
The control terminal 12c connections of second end 12b the first level terminal of connection V1 of unit 12, second control unit 12 control voltage end
VC, second control unit 12 are used under the control of the voltage of the control voltage end VC control section that is turned on or off
Point a and the first level terminal V1.
The voltage detection unit 13 connects the first end 11a of first control unit 11, the first level terminal V1
And voltage detecting end VT, voltage for detecting the voltage detecting end VT are simultaneously true according to the voltage of the voltage detecting end VT
The state of the accessed microphones of the fixed microphone access interface MIC+.
The microphone state detection circuit that the utility model embodiment provides, including：First control unit, the second control are single
Member and voltage detection unit；Wherein, first control unit can control under the control of the voltage of the control node
The power voltage terminal is turned on or off with the microphone access interface, and second control unit can be in the control
The control node that is turned on or off under the control of the voltage of voltage end and first level terminal, the voltage detection unit can
To detect the voltage at the voltage detecting end and determine the microphone access interface institute according to the voltage at the voltage detecting end
Access the state of microphone.The state that can determine microphone i.e. in the embodiment of the present application according to the voltage at voltage detecting end, because
This embodiment of the present application provides a kind of detection microphone shape in the case of not using the integrated IC for being internally integrated DC/DC converters
The circuit of state.
Optionally, with reference to shown in Fig. 2, first control unit 11 is metal-oxide semiconductor (MOS) (Metal-Oxide-
Semiconductor, MOS) pipe Q1；
The first end 11a of first control unit 11 is the source electrode of the metal-oxide-semiconductor Q1, first control unit 11
Second end 11b is the drain electrode of the metal-oxide-semiconductor Q1, and the control terminal 11c of first control unit 11 is the grid of the metal-oxide-semiconductor Q1
Pole.
Further alternative, with reference to shown in Fig. 2, second control unit 12 is switching transistor Q2；
The first end 12a of second control unit 12 is the first pole of the switching transistor Q2, second control
The second end 12b of unit 12 is the second pole of the switching transistor Q2, and the control terminal 12c of second control unit 12 is institute
State the grid of switching transistor Q2.
Specifically, the switching transistor Q2 in above-described embodiment can be switching transistor.
Further alternative, with reference to shown in Fig. 2, the voltage detection unit 13 includes：The electricity of 5th resistance R5 and the 6th
Hinder R6；
The first end of the 5th resistance R5 connects the first end 11a of first control unit 11, the 5th resistance
The second end of R5 connects the voltage detecting end VT；
The first end of the 6th resistance R6 connects the voltage detecting end VT, the second end connection of the 6th resistance R6
The first level terminal V1.
It is carried below by P-channel metal-oxide-semiconductor, the N-type switching transistor of switching transistor, the first level terminal V1 ground connection of metal-oxide-semiconductor
The operation principle of microphone state detection circuit for carrying out providing above-described embodiment for ground voltage illustrates.
The microphone state detection circuit that above-described embodiment provides after the power-up, controls voltage end VC and exports high level first
Voltage is the N-type switching transistor be connected when grid high level due to switching transistor Q2, switching transistor Q2 conductings,
Control node a is grounded by 3rd resistor R3, and first node a voltages are low level at this time, and since metal-oxide-semiconductor Q1 is P-channel MOS
Pipe, therefore metal-oxide-semiconductor Q1 is also at conducting state.
At this point, if microphone access interface MIC+ does not access microphone, i.e. microphone access interface MIC+ is in open circuit shape
State, then the current direction at this time in above-mentioned microphone state detection circuit is as shown in Figure 3.As shown in figure 3, electric current is by supply voltage
End VCC splits into two-way after first resistor R1 outflows and flows into the first level terminal V1.Wherein, the first via is：5th resistance R5 and
6th resistance R6 connects the access to be formed, and the second tunnel is：4th resistance R4 and 3rd resistor R3 connects the access to be formed.At this time may be used
With according to the connection relation of each resistance in circuit, the voltage value of power voltage terminal VCC, the first level terminal V1 voltage value calculate or
Measure the voltage value Vopen for obtaining voltage detecting end VT.
At this point, if the microphone of microphone access interface MIC+ access normal works, i.e. microphone access interface MIC+ connect
Enter microphone, and microphone works normally, then the current direction at this time in above-mentioned microphone state detection circuit is as shown in Figure 4.
Wherein, load resistance value when R7 is microphone normal work in Fig. 4.As shown in figure 4, electric current by power voltage terminal VCC through first
Three roads, which are split into, after resistance R1 outflows flows into the first level terminal V1.Wherein, the first via is：5th resistance R5 and the 6th resistance R6 strings
Join the access formed, the second tunnel is：4th resistance R4 and 3rd resistor R3 connects the access to be formed, and third road is：Second resistance
R2 and the 7th resistance R7 connects the access to be formed.It equally, at this time can be according to the connection relation of each resistance, supply voltage in circuit
The voltage value of the voltage value, the first level terminal V1 of holding VCC calculates or measures the voltage value for obtaining voltage detecting end VT at this time
Vwork。
At this point, if the microphone of microphone access interface MIC+ access short circuits, i.e. microphone access interface MIC+ access wheat
Gram wind, and microphone internal short-circuit, then the current direction at this time in above-mentioned microphone state detection circuit is as shown in Figure 5.Such as Fig. 5
Shown, electric current splits into three roads after first resistor R1 flows out by power voltage terminal VCC and flows into the first level terminal V1.Wherein,
It is all the way：5th resistance R5 and the 6th resistance R6 connects the access to be formed, and the second tunnel is：4th resistance R4 and 3rd resistor R3 strings
Join the access formed, third road is：The access that second resistance R2 is formed.It equally, at this time can be according to the company of each resistance in circuit
It connects relationship, the voltage value of power voltage terminal VCC, the voltage value calculating of the first level terminal V1 or measurement and obtains voltage detecting end at this time
The voltage value Vshort of VT.
Can be detected or calculated after the completion of microphone state detection circuit manufactures in practical application obtain above-mentioned Vopen,
The value of Vwork and Vshort, when above-mentioned microphone state detection circuit carries out state-detection to microphone, according to detection electricity
The magnitude relationship of the voltage value that pressure side VT is detected and the value of Vopen, Vwork and Vshort determines the state of microphone.Example
Such as：When the voltage value that detection voltage end VT is detected is identical as the value of Vopen, it is determined that microphone is not inserted into, or is inserted into Mike
Wind is in open-circuit condition；When the voltage value that detection voltage end VT is detected is identical as the value of Vwork, it is determined that microphone is inserted into,
And it is in normal operating conditions；When the voltage value that detection voltage end VT is detected is identical as the value of Vshort, it is determined that microphone
It is inserted into, and is inserted into microphone and is in short-circuit condition.
Further, the switching transistor Q2 in the microphone state detection circuit in above-described embodiment can also be grid
The p-type switching transistor of extremely low electricity conducts only needs to readjust if switching transistor Q2 is p-type switching transistor
Control the voltage value of voltage end VC outputs.Specific adjustment mode is that control control voltage end VC exports low electricity when powering on
It is flat.
Further, the metal-oxide-semiconductor Q1 in the microphone state detection circuit in above-described embodiment can also be N-channel
Metal-oxide-semiconductor, if metal-oxide-semiconductor Q1 is N-channel MOS pipe, as long as adjusting the resistance value of each resistance and the voltage value of the first level terminal again,
When to make switching transistor Q2 be connected, the voltage of control node a is high level, when switching transistor Q2 ends, control node a
Voltage be low level.
Further optional, with reference to shown in Fig. 6, the microphone state detection circuit further includes：Processor 14；
The voltage detecting end VT and the control voltage end VC are connect with the processor 14, and the processor 14 is used
In the output voltage for adjusting the control voltage end VC according to the voltage of the voltage detecting end VT.
Optionally, the processor be specifically as follows a central processing unit (Central Processing Unit,
CPU) or specific integrated circuit (Application Specific Integrated Circuit, ASIC), either
It is configured to implement one or more integrated circuits of the embodiment of the present application.
Microphone state detection circuit further includes in above-described embodiment：Processor, and processor can be examined according to voltage
The voltage for surveying end adjusts the voltage of the control voltage end, therefore when the voltage value at voltage detecting end and when microphone short circuit
When Vshort is equal, processor can control the voltage that control voltage end output can be such that switching transistor ends, to make MOS
Pipe is also at cut-off state, and then prevents electric current in circuit excessive, and overcurrent is avoided to burn microphone state detection circuit.
Further alternative, with reference to shown in Fig. 7, the microphone state detection circuit further includes：Safety element TH；
The safety element TH is series between the power voltage terminal VCC and the first resistor R1.
Microphone state detection circuit in above-described embodiment is further in power voltage terminal VCC and the first resistor R1
Between be provided with safety element TH, can therefore when microphone state detection circuit short circuit occurred inside in the above-described embodiments
To disconnect the connection of microphone state detection circuit and power voltage terminal in time, to prevent burning the power supply for generating supply voltage
Circuit.
One embodiment of the application provides a kind of vehicle multi-media player, which includes any of the above-described
The microphone state detection circuit that embodiment provides.
In addition, the vehicle multi-media player that the utility model embodiment provides includes the microphone that above-described embodiment provides
State detection circuit, therefore, attainable advantageous effect can refer to corresponding microphone state detection presented above
Advantageous effect in circuit, details are not described herein again.
It should be noted that herein, the terms "include", "comprise" or its any other variant are intended to non-row
His property includes, so that process, method, article or device including a series of elements include not only those elements, and
And further include other elements that are not explicitly listed, or further include for this process, method, article or device institute it is intrinsic
Element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that including this
There is also other identical elements in the process of element, method, article or device.
Through the above description of the embodiments, those skilled in the art can be understood that above-described embodiment side
Method can add the mode of required general hardware platform to realize by software, naturally it is also possible to by hardware, but in many cases
The former is more preferably embodiment.Based on this understanding, the technical solution of the application substantially in other words does the prior art
Going out the part of contribution can be expressed in the form of software products, which is stored in a storage medium
In (such as ROM/RAM, magnetic disc, CD), including some instructions are used so that a station terminal (can be mobile phone, computer, service
Device, air conditioner or network equipment etc.) execute each embodiment of the application described in method.
Embodiments herein is described above in conjunction with attached drawing, but the application be not limited to it is above-mentioned specific
Embodiment, the above mentioned embodiment is only schematical, rather than restrictive, those skilled in the art
Under the enlightenment of the application, the application objective and scope of the claimed protection are not being departed from, can also made very much
Form belongs within the protection of the application.
Claims (10)
1. a kind of microphone state detection circuit, which is characterized in that including：First control unit, the second control unit and electricity
Press detection unit；
The first end of first control unit by first resistor connect power voltage terminal, the second of first control unit
End connects microphone access interface by second resistance, and the control terminal of first control unit connects control node；Described
One control unit is accessed for controlling the power voltage terminal under the control of the voltage of the control node with the microphone
Port is turned on or off；
The first end of second control unit connects the control node by 3rd resistor end, and passes through first electricity
Resistance, the 3rd resistor connect the power voltage terminal, the second end connection first of second control unit with the 4th resistance
Level terminal, the control terminal connection control voltage end of second control unit, second control unit are used in the control
The control node that is turned on or off under the control of the voltage of voltage end and first level terminal；
The voltage detection unit connects first end, first level terminal and the voltage detecting of first control unit
It holds, the voltage for detecting the voltage detecting end simultaneously determines the microphone incoming end according to the voltage at the voltage detecting end
The state of mouth institute access microphone.
2. microphone state detection circuit according to claim 1, which is characterized in that first control unit is metal
Oxide semiconductor metal-oxide-semiconductor；
The first end of first control unit is the source electrode of the metal-oxide-semiconductor, and the second end of first control unit is described
The drain electrode of metal-oxide-semiconductor, the control terminal of first control unit are the grid of the metal-oxide-semiconductor.
3. microphone state detection circuit according to claim 2, which is characterized in that the metal-oxide-semiconductor is P-channel metal-oxide-semiconductor.
4. microphone state detection circuit according to claim 1, which is characterized in that second control unit is switch
Transistor；
The first end of second control unit is the first pole of the switching transistor, the second end of second control unit
For the second pole of the switching transistor, the control terminal of second control unit is the grid of the switching transistor.
5. microphone state detection circuit according to claim 4, which is characterized in that the switching transistor is opened for N-type
Close transistor.
6. microphone state detection circuit according to claim 1, which is characterized in that the voltage detection unit includes：
5th resistance and the 6th resistance；
The first end of 5th resistance connects the first end of first control unit, the second end connection of the 5th resistance
The voltage detecting end；
The first end of 6th resistance connects the voltage detecting end, second end connection first electricity of the 6th resistance
Flush end.
7. microphone state detection circuit according to claim 1, which is characterized in that the microphone state detection circuit
Further include：Processor；
The voltage detecting end and the control voltage end are connected to the processor, and the processor is used for according to the electricity
The voltage of pressure test side adjusts the voltage of the control voltage end.
8. according to claim 1-7 any one of them microphone state detection circuits, which is characterized in that the microphone state
Detection circuit further includes：Safety element；
The safety element is series between the power voltage terminal and the first resistor.
9. according to claim 1-7 any one of them microphone state detection circuits, which is characterized in that first level terminal
Ground connection.
10. a kind of vehicle multi-media player, which is characterized in that including claim 1-9 any one of them microphone states
Detection circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820384092.1U CN207939738U (en) | 2018-03-20 | 2018-03-20 | A kind of microphone state detection circuit and vehicle multi-media player |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820384092.1U CN207939738U (en) | 2018-03-20 | 2018-03-20 | A kind of microphone state detection circuit and vehicle multi-media player |
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|---|---|
| CN207939738U true CN207939738U (en) | 2018-10-02 |
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ID=63655463
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109068238A (en) * | 2018-10-09 | 2018-12-21 | 晶晨半导体(上海)股份有限公司 | microphone and intelligent sound box |
| CN113573227A (en) * | 2021-08-03 | 2021-10-29 | Tcl通讯（宁波）有限公司 | Microphone fault detection system, microphone fault detection method, electronic device and storage medium |
| CN115361609A (en) * | 2022-08-30 | 2022-11-18 | 歌尔微电子股份有限公司 | Electronic device test circuit and microphone array module |
-
2018
- 2018-03-20 CN CN201820384092.1U patent/CN207939738U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109068238A (en) * | 2018-10-09 | 2018-12-21 | 晶晨半导体(上海)股份有限公司 | microphone and intelligent sound box |
| CN113573227A (en) * | 2021-08-03 | 2021-10-29 | Tcl通讯（宁波）有限公司 | Microphone fault detection system, microphone fault detection method, electronic device and storage medium |
| CN113573227B (en) * | 2021-08-03 | 2023-12-12 | Tcl通讯（宁波）有限公司 | Microphone fault detection system, detection method thereof, electronic device and storage medium |
| CN115361609A (en) * | 2022-08-30 | 2022-11-18 | 歌尔微电子股份有限公司 | Electronic device test circuit and microphone array module |
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