CN209314034U - The decision circuitry and electronic equipment of earphone MIC positive and negative terminal - Google Patents
The decision circuitry and electronic equipment of earphone MIC positive and negative terminal Download PDFInfo
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- CN209314034U CN209314034U CN201920405520.9U CN201920405520U CN209314034U CN 209314034 U CN209314034 U CN 209314034U CN 201920405520 U CN201920405520 U CN 201920405520U CN 209314034 U CN209314034 U CN 209314034U
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Abstract
The utility model provides the decision circuitry and electronic equipment of a kind of earphone MIC positive and negative terminal, which includes comparison module and control module；The control module is connected to the both ends of the MIC, and an arbitrary first end injects exciting current in the both ends to control the MIC, and controls in the both ends of the MIC another second end and be connected to ground through analog switch；The comparison module is connected at least one of two lines of loudspeakers of the earphone, to acquire the current voltage of corresponding position in the lines of loudspeakers；The comparison module is also connected with the control module, is used to judge that the first end and the positive and negative comparison result information of the second end to be sent to control module for what the current voltage and preset reference voltage value obtained.The utility model is effectively simplified process flow, improves treatment effeciency, simultaneously as only needing one-shot measurement, the utility model also no longer needs two sets of detection devices, can be conducive to the saving of cost without implementing to measure twice in process.
Description
Technical field
The utility model relates to Type-C earphone field more particularly to a kind of decision circuitries of earphone MIC positive and negative terminal and electricity
Sub- equipment.
Background technique
Type-C earphone, it can be understood as the external interface of the earphone is standardized based on USB Type-C, wherein USB
Type-C, referred to as USB-C are a kind of hardware interface specifications of universal serial bus (USB).The external interface of Type-C earphone
It can support blindmate, i.e., positive and negative grafting.However, using in the electronic equipment of the earphone, only judge to be currently inserted into
The positive electrode and negative electrode of MIC in earphone judge that the MIC is just to connect or be reversely connected, could correctly transmit signal.
It is existing in the related technology, in order to judge that MIC is just to connect or be reversely connected, can earphone be inserted into when successively implement with
Lower two steps, the first step, the second end for controlling MIC are connected to ground through analog switch, such as can pass through the SBU2 foot for connecting the second end
Then analog switch ground connection injects an exciting current in the first end of MIC, such as can be in the SBU1 foot for connecting the first end
Exciting current is injected, the voltage V1 of SBU1 foot at this time is then detected in the way of ADC；Second step, the first end warp for controlling MIC
Analog switch is connected to ground, such as can be grounded the SBU1 foot for connecting the first end through analog switch, then infuses in the second end of MIC
Enter same exciting current, such as exciting current can be entered in the SBU2 footnote of connection second end, is then examined in the way of ADC
Survey the voltage V2 of SBU2 foot at this time.
At this point, can determine whether that the first end for the MIC that SBU1 foot is connected is cathode if obtaining V2 > V1 > preset value,
The second end for the MIC that SBU2 foot is connected is anode；If finally obtained: V1 > V2 > preset value can determine whether that SBU1 foot is corresponding
The first end of MIC be anode, the second end of the corresponding MIC of SBU2 foot is cathode.Preset value therein can be empirical value.
As it can be seen that in the prior art, judging that the process flow of MIC positive-negative connected is complex, such as need two secondary controls excitation electricity
The injection of stream, two secondary controls ground connection, and voltage is detected twice, meanwhile, it is detected twice to realize, just needs the inspection of two sets of ADC
Measurement equipment, cost are also higher.
Utility model content
The utility model provides the decision circuitry and electronic equipment of a kind of earphone MIC positive and negative terminal, with solve process flow compared with
For complicated and cost also higher problem.
It is according to the present utility model in a first aspect, providing a kind of decision circuitry of earphone MIC positive and negative terminal, the earphone is
Type-C earphone, wherein the negative terminal of MIC is connect with the common end of two lines of loudspeakers, the judgement of the earphone MIC positive and negative terminal
Circuit, comprising: comparison module and control module；
The control module is connected directly or indirectly to the both ends of the MIC, arbitrary in the both ends to control the MIC
One first end injects exciting current, and controls in the both ends of the MIC another second end and be connected to ground through analog switch；
The comparison module is connected at least one of two lines of loudspeakers of the earphone, to acquire the loudspeaker
The current voltage of corresponding position in route；
The comparison module is also connected with the control module, and the current voltage and preset reference voltage value are obtained
For judging the first end and the positive and negative comparison result information of the second end is sent to control module.
Optionally, the comparison result information includes the first comparison result information, and the comparison module is specifically used in institute
When stating current voltage higher than the reference voltage value, Xiang Suoshu control module sends the first comparison result information.
Optionally, the comparison result information includes the second comparison result information, and the comparison module is specifically used in institute
When stating current voltage lower than the reference voltage value, Xiang Suoshu control module sends the second comparison result information.
Optionally, the comparison module includes comparator, and the first input end of the comparator inputs the current voltage,
Second input terminal of the comparator inputs the reference voltage value, and the output end of the comparator connects the control module,
To send the comparison result information to the control module.
Optionally, the first input end of the comparator is connected to the public of two lines of loudspeakers through earphone speaker
End.
Optionally, the control module is also respectively connected with the MIC pin and ground pin of audio processing modules, in determination
After the positive and negative terminal of the first end and the second end, the MIC pin for being just connected to audio processing modules of the MIC is controlled,
And the negative terminal for controlling the MIC is connected to the ground pin of the audio processing modules.
Second aspect according to the present utility model, additionally provides a kind of electronic equipment for having access to earphone, and feature exists
In the decision circuitry including the earphone MIC positive and negative terminal that first aspect and its optinal plan are related to.
Optionally, the electronic equipment for having access to earphone, further includes interface module, and the interface module connects respectively
Connect the control module and the comparison module；
When the earphone accesses the interface module, the control module is respectively connected to institute by the interface module
State the both ends of MIC；
When the earphone accesses the interface module, the comparison module is connected to described two by the interface module
At least one of a lines of loudspeakers.
Optionally, the interface module includes the first interface component for the first end for connecting the control module, Yi Jilian
The second interface component of the second end of the control module is connect, the first interface component accesses the electronics in the earphone and sets
The first end of the MIC is connected when standby, the second interface component is when the earphone accesses the electronic equipment described in connection
The second end of MIC.
Optionally, the electronic equipment is following one of any: mobile phone, computer, tablet computer and verbal system.
The decision circuitry and electronic equipment of earphone MIC positive and negative terminal provided by the utility model, by Type-C earphone
Circuit framework is explored, it is found that the cathode of MIC therein is connect with two lines of loudspeakers, in turn, the utility model
It is really the corresponding voltage of MIC negative terminal that the collected voltage of institute, which can be known in advance, in middle control module, in which:
With VMICThe pressure drop at the both ends MIC is indicated, with VswitchThe pressure drop of analog switch is indicated, with VxIndicate the current electricity measured
Pressure, with VrefIndicate preset voltage value associated with reversal connection minimum voltage, then:
If injecting the first end of exciting current for MIC anode, and measured VxFor the voltage of MIC negative terminal, then Vx=Vswitch,
Due to VrefMuch larger than V at this timeswitch, then have: VxMuch smaller than Vref, then, if having measured VxLess than Vref, then can deduce this
One end is MIC anode；
If injecting the first end of exciting current for MIC negative terminal, and measured VxFor the voltage of MIC negative terminal, that is, when being reversely connected, Vx
Greater than reversal connection minimum voltage, i.e. VxGreater than Vref, then, if having measured VxGreater than VrefIt can then deduce that the first end is MIC negative
End.
As it can be seen that passing through VxWith VrefComparison, only need one-time detection, so that it may accurate judgement MIC first end and second end
Positive and negative terminal, so that it is determined that MIC is just to connect or be reversely connected.
In contrast, it is existing in the related technology, from MIC anode inject an exciting current, MIC negativing ending grounding, at this time
The voltage of the MIC anode measured, which is positive, connects voltage, injects an exciting current from MIC negative terminal, MIC positive ending grounding is surveyed at this time
The voltage of the MIC negative terminal arrived is to be reversely connected voltage, for different types of MIC, it is possible to will appear the reversal connection voltage of a kind of MIC
Just connect voltage greater than another kind of MIC, certain similar MIC just connect voltage and reversal connection voltage distinguish it is unobvious, meanwhile,
One end that exciting current is accessed when measurement is just or to bear, and it is unknowable that the one end measured, which is just or negative, so existing
There is method to need respectively to inject primary current to the anode of MIC and anti-foot and tested, to compare and judge.Therefore,
Existing just must be introduced into the related technology measures twice.
In contrast, the utility model finds and the negative terminal of MIC is utilized to connect with the common end of two lines of loudspeakers
Electric circuit characteristic breaches the existing technology for thinking to judge that MIC positive and negative terminal should directly detect corresponding positive and negative terminal voltage in the related technology
Prejudice.In turn, the utility model is by comparing current provided by the connection of module and lines of loudspeakers and the hardware configuration
Compared with reference voltage value survey can be completed under hardware access provided by it by the improvement of hardware configuration in voltage
Examination, measures twice without implementing in process, is effectively simplified process flow, improves treatment effeciency, simultaneously as only needing primary
Measurement, the utility model also no longer need two sets of detection devices, can be conducive to the saving of cost.
In the utility model, since the utility model is not required to detection twice, detected data can be directly compared,
And then digitized processing is no longer necessary means with caching, can be advantageously implemented other lower-cost detection means,
It is no longer limited to the mode of ADC, it is seen then that it may also be advantageous for reducing cost, for this, the further optinal plan of the utility model
Can be used compared with current voltage that comparator will test carries out directly with reference voltage value, further reduced device at
This.
Detailed description of the invention
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, before not making the creative labor property
It puts, is also possible to obtain other drawings based on these drawings.
Fig. 1 is the circuit diagram one of the decision circuitry of earphone MIC positive and negative terminal and earphone in the utility model embodiment；
Fig. 2 is the circuit diagram two of the decision circuitry of earphone MIC positive and negative terminal and earphone in the utility model embodiment；
Fig. 3 is a kind of schematic illustration one of the decision circuitry of earphone MIC positive and negative terminal in the utility model embodiment；
Fig. 4 is a kind of schematic illustration two of the decision circuitry of earphone MIC positive and negative terminal in the utility model embodiment；
Fig. 5 is the electricity of the decision circuitry of earphone MIC positive and negative terminal in the utility model embodiment, earphone and audio processing modules
Road schematic diagram；
Fig. 6 is a kind of circuit diagram one of control module in the utility model embodiment；
Fig. 7 is a kind of circuit diagram two of control module in the utility model embodiment；
Fig. 8 is the circuit diagram of electronic equipment and earphone in the utility model embodiment；
Fig. 9 is a kind of flow diagram of the judgment method of earphone MIC positive and negative terminal in the utility model embodiment.
Description of symbols:
The decision circuitry of 1- earphone MIC positive and negative terminal；
11- comparison module；
111- comparator；
12- control module；
121- controls chip；
2- earphone；
21-MIC；
22- lines of loudspeakers；
3- audio processing modules；
4- electronic equipment；
41- interface module；
The first equivalent resistance of R1-；
The second equivalent resistance of R2-；
S1- analog switch.
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 without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
The specification and claims of the utility model and term " first ", " second ", " third " in above-mentioned attached drawing
(if present)s such as " the 4 " are to be used to distinguish similar objects, without being used to describe a particular order or precedence order.It answers
The data that the understanding uses in this way are interchangeable under appropriate circumstances, so that the embodiments of the present invention described herein can
Implemented with the sequence other than those of illustrating or describing herein.In addition, term " includes " and " having " and they
Any deformation, it is intended that cover it is non-exclusive include, for example, containing the process, method of a series of steps or units, being
System, product or equipment those of are not necessarily limited to be clearly listed step or unit, but may include be not clearly listed or
For the intrinsic other step or units of these process, methods, product or equipment.
The technical solution of the utility model is described in detail with specifically embodiment below.These are specific below
Embodiment can be combined with each other, and the same or similar concept or process may be repeated no more in some embodiments.
Fig. 1 is the circuit diagram one of the decision circuitry of earphone MIC positive and negative terminal and earphone in the utility model embodiment；Figure
2 be the circuit diagram two of the decision circuitry of earphone MIC positive and negative terminal and earphone in the utility model embodiment；Fig. 3 is that this is practical
A kind of schematic illustration one of the decision circuitry of earphone MIC positive and negative terminal in new embodiment；Fig. 4 is in the utility model embodiment
A kind of schematic illustration two of the decision circuitry of earphone MIC positive and negative terminal.
The decision circuitry of earphone MIC positive and negative terminal involved in the utility model embodiment can be applied to Type-C earphone
The positive and negative terminal of middle MIC is judged.
Please refer to figs. 1 to 4, and the decision circuitry 1 of earphone MIC positive and negative terminal can be applied to Type-C earphone, it may be assumed that the earphone
2 be Type-C earphone, wherein earphone 2 may include MIC21 and lines of loudspeakers 22.
MIC21 therein, it can be understood as the combination of device or device that external voice signal is acquired and is transmitted,
It has anode and negative terminal, the anode and negative terminal of MIC21 to inside and outside, it will be appreciated that are as follows: audio processing modules are connected in its anode
Anode, and the negative terminal of its negative terminal and audio processing modules altogether after, the transmission of external voice signal may be implemented so that
Audio processing modules can carry out relevant treatment to voice signal.The anode of audio processing modules also is understood as the end MIC or MIC
Pin, negative terminal also are understood as ground terminal or ground pin.
Lines of loudspeakers 22 therein, can be and right for that can receive audio signal from electronic equipment that earphone is connected
The outer electronic circuit for issuing corresponding sound.It can wherein may also include for example including the earphone speaker that can issue sound wave to sound
The device that frequency signal amplifies, filters, transmitting, buck etc. arbitrarily acts on, and for realizing between device connecting communication its
His device.
Each earphone can correspond to tool, and there are two lines of loudspeakers 22, lines of loudspeakers 22 and the auris dextras of respectively left ear
Lines of loudspeakers 22, each earphone can have a MIC21.
In addition, MIC21 can be configured in a shell with any one lines of loudspeakers 22, one can also be separately set in
In a shell, as long as the mode of connection relationship involved in context or data transmission is realized, no matter it is spatially
How to design, all without departing from the associated description of the utility model embodiment.
In Type-C earphone, the negative terminal of MIC21 is connect with the common end of two lines of loudspeakers 22.Specifically it can refer to
The pin definitions and internal circuit of Type-C earphone, are known in the art common sense, so, circuit is no longer passed through for this
Figure or text are described in detail.Also therefore, arbitrarily by the utility model embodiment, related scheme is applied to Type- hereinafter
The scheme of C earphone, all without departing from the scope of the utility model.
In addition, the judgement to MIC21 positive and negative terminal, the judgement that also is understood as just meeting MIC21 or be reversely connected；Wherein, sentence
Disconnected be positive connects, and can for example be interpreted as the anode that MIC21 is judged and be currently connected to the MIC pin of audio processing modules,
The negative terminal that MIC21 is identified is currently connected to the ground pin of audio processing modules, conversely, it is judged as reversal connection, it can be such as
It is interpreted as the anode that MIC21 is judged to be currently connected to the ground pin of audio processing modules, the negative terminal that MIC is identified
It is currently connected to the MIC pin of audio processing modules.
Please refer to figs. 1 to 4, the decision circuitry 1 of the earphone MIC positive and negative terminal, comprising: comparison module 11 and control module
12。
The control module 12 is connected directly or indirectly to the both ends of the MIC21, for controlling the two of the MIC21
An arbitrary first end injects exciting current I in end, and controls another second end in the both ends of the MIC21 and be connected to ground.
By controlling above, MIC21 can be made to form the access for just connecing or being reversely connected, it in turn, can adopting for voltage
Collect and compare offer basis.Simultaneously as existing the relevant technologies also need to inject exciting current to MIC21, so, control swashs
Electric current is encouraged to be injected, and control ground connection mode, can using it is existing in the related technology by the way of.
In one of embodiment, first end and the second end of MIC21 can be separately connected control module 12 one is defeated
Outlet, control module 12 can be externally by corresponding output end to the first end and second end output drive electric currents of MIC21.
In one of embodiment, first end and the second end of MIC21 can be connected to through an analog switch S1 respectively
Corresponding first end or the second end can be connected to ground when one of them analog switch of the control of control module 12 is closed by ground.
In another embodiment, due to only needing to inject primary excitation in the subsequent implementation mode of the utility model embodiment
Electric current, so, the connection type and action principle at the both ends of MIC21 can be identified as one end for being grounded, and the other end is for injecting
Exciting current can also be conducive to set the simplification of circuit without keeping both ends to be used equally for ground connection and injection exciting current
Meter.
Fig. 3 and Fig. 4 are please referred to, in specific embodiment, as long as realizing that at least one of Fig. 3's and Fig. 4 is logical by control
Road form can whether switch under two kinds of passage forms, can fall in the range of the utility model embodiment.
The comparison module 11 is connected at least one of two lines of loudspeakers 22 of the earphone, is raised with acquiring this
The current voltage of corresponding position in sound device route 22.
The comparison module 11 is also connected with the control module 12, and the comparison result information is sent to control module
12。
After the comparison module 11 is used in the first end by injection exciting current I, and the second end is grounded, than
The current voltage and preset reference voltage value, obtain comparison result information.
Hardware relationship referred to above can be regarded as:
The comparison module is also connected with the control module, and the current voltage and preset reference voltage value are obtained
For judging the first end and the positive and negative comparison result information of the second end is sent to control module.
Reference voltage value, it can be understood as it is predetermined to be the minimum value of reversal connection voltage, or determined according to the minimum value
Another voltage value.Meanwhile the reference voltage value, it can be the empirical value that artificial or machine determines, in a kind of embodiment, needle
For the parameter of resistance in specific exciting current, analog switch, lines of loudspeakers etc., it can correspond to and be determined at a reference voltage
Value.
In concrete example, when exciting current chooses 1mA, corresponding reference voltage value can be 100mV.
Due to reference voltage value be it is existing be also required to determining value in the related technology, so, under any logic caused by
Reference voltage value can be applied to the present embodiment and form feasible embodiment.In addition, whether existing reference voltage value
Value logic, or there is certain improved value logic, all without departing from the description of the present embodiment.
Comparison result information, it can be understood as which bigger times of current voltage and reference voltage value can be symbolized
The information of meaning form.
In a kind of embodiment, comparison result information can use two different information to characterize two different comparisons
As a result, for example, the first comparison result information and the second comparison result information, corresponding, control module can receive the first ratio
Directly learn which kind of comparison result bottom is when compared with result information or the second comparison result information.
In another embodiment, comparison result information be may be alternatively configured as, and only be issued in a kind of the case where comparison result
Information out does not issue information in the case where another comparison result, and corresponding, control module can be configured to, if receiving
The information then can determine that current voltage is greater than reference voltage value；If not receiving, it can determine that current voltage is less than reference voltage
Value.
As it can be seen that according to the circuit configuration of comparison module 11 and control module 12 difference, the information shape of comparison result information
Formula itself, and issue logic and may each be multiplicity.
The control module 12 is also used to judge according to the comparison result information first end and the second end
Positive and negative terminal is just being connect or is being reversely connected with the determination MIC21.
In one of embodiment, if comparison result information includes the first comparison result information, the comparison module 11
Specifically for when the current voltage is higher than the reference voltage value, Xiang Suoshu control module sends first comparison result
Information.
Corresponding, the control module 12 is specifically used for determining the first end according to the first comparison result information
For the negative terminal of the MIC21, the second end is the anode of the MIC21.
In one of embodiment, if comparison result information includes the second comparison result information, the comparison module 11
Specifically for when the current voltage is higher than the reference voltage value, Xiang Suoshu control module 12 sends the second comparison result letter
Breath.
Corresponding, the judgment module 11 is specifically used for determining the first end according to the second comparison result information
For the anode of the MIC21, the second end is the negative terminal of the MIC21.
In specific implementation process, if characterizing the first comparison result information with high level signal, it is higher than in current voltage
Such as 100Mv reference voltage value when, when control module 12 can receive the high level signal from comparison module 11, so that it is determined that
First end is the negative terminal of the MIC21, and second end is the anode of MIC21；If characterizing the second comparison result with low level signal
Information, then when current voltage is lower than the reference voltage value of such as 100Mv, control module 12 can receive this from comparison module 11
Low level signal, so that it is determined that first end is the anode of the MIC21, second end is the negative terminal of MIC21.
In one of embodiment, Fig. 2 to Fig. 3 is please referred to, the comparison module 11 includes comparator 111, the ratio
The current voltage is inputted compared with the first input end of device 111, the second input terminal input of the comparator 111 is described with reference to electricity
The output end of pressure value, the comparator 111 connects the control module, to send the comparison result letter to the control module
Breath.Specific exportable high level signal or low level signal referred to above.
Meanwhile the present embodiment is also not excluded for detecting in the way of ADC obtaining current voltage, and compares current voltage
With the mode of reference voltage value.
In lines of loudspeakers 22, it can be equipped between the first input end of comparator and the common end of two lines of loudspeakers
Earphone speaker, the earphone speaker can be characterized using equivalent resistance, such as the first equivalent resistance R1 shown in figure and
Two equivalent resistance R2.As it can be seen that the collected current voltage of comparator institute, can not common end voltage itself, but with it is public
Have certain associated between the voltage at end, in a kind of embodiment, since comparator input impedance is very big, comparator is adopted herein
The current voltage collected can also be equal with the voltage of common end, corresponding, comparator compared be common end voltage with
Reference voltage value.
If the SBU1 pin in the interface module that the first end of MIC21 passes through earphone is connect with control module 12, MIC21
Second end connect by the SBU2 pin in the interface module of earphone interface with control module 12, meanwhile, with VMICIndicate MIC
The pressure drop at both ends, with VswitchThe pressure drop of analog switch is indicated, with VxThe current voltage measured is indicated, with VrefIndicate it is preset with
It is reversely connected the associated voltage value of minimum voltage, then has:
In the embodiment shown in fig. 3, the first end of exciting current I is injected for MIC negative terminal, and measured VxIt is negative for MIC
The voltage at end, that is, when being reversely connected, VxGreater than reversal connection minimum voltage, i.e. VxGreater than Vref, then, if having measured VxGreater than VrefIt can then push away
Know that the first end is MIC negative terminal.
In an embodiment shown in fig. 4, the first end of exciting current is injected for MIC anode, and measured VxFor MIC negative terminal
Voltage, then Vx=Vswitch, due to VrefMuch larger than V at this timeswitch, then have: the current voltage at this time detected is equal to
The conducting resistance of analog switch K1 multiplied by 1mA's as a result, since the conducting resistance is usually less than 100 milliohms, so at this time when
Preceding voltage VxReference voltage value V should be much smaller thanref, i.e. VxMuch smaller than Vref, then, if having measured VxLess than Vref, then can deduce this
First end is MIC anode.
Fig. 5 is the electricity of the decision circuitry of earphone MIC positive and negative terminal in the utility model embodiment, earphone and audio processing modules
Road schematic diagram.
Referring to FIG. 5, the control module 12 is also connected with audio processing modules 3.
Audio processing modules 3 can carry out the circuit of audio processing, Yi Zhongshi for the signal arbitrarily come to earphone transmission
It applies in mode, can also for example understand are as follows: can be identified simultaneously by the processor of electronic equipment through treated the signal of audio processing modules 3
For information processing.
Audio processing modules 3 have MIC pin and ground pin, and as mentioned before, when just connecing, MIC pin can connect
It is connected to MIC anode, ground pin can be connected to MIC negative terminal.
Control module 12 is also used to after determining the positive and negative terminal of the first end and the second end, controls the MIC21
The MIC pin for being just connected to audio processing modules 3, to receive the signal of MIC21 transmission using the MIC pin, and
The negative terminal for controlling the MIC21 is connected to the ground pin of the audio processing modules 3.
Hardware relationship referred to above can be such as:
The control module is also respectively connected with the MIC pin and ground pin of audio processing modules, to determine described
After the positive and negative terminal of one end and the second end, the MIC pin for being just connected to audio processing modules of the MIC is controlled, and control
The negative terminal of the MIC is connected to the ground pin of the audio processing modules.
Fig. 6 is a kind of circuit diagram one of control module in the utility model embodiment.
Referring to FIG. 6, control module 12 may include control chip 121, control chip is separately connected using four ports
To the ground pin of the anode of MIC21, the negative terminal of MIC21, the MIC pin of audio processing modules 3 and audio processing modules 3.Into
And by the way that the anode and audio processing modules of MIC21 itself are realized in control chip 121 to the definition of each port and conducting situation
The connection of the ground pin of the negative terminal and audio processing modules 3 of the connection and MIC21 of 3 MIC pin.
Fig. 7 is a kind of circuit diagram two of control module in the utility model embodiment.
Referring to FIG. 7, control module 12 may include control chip 121, may also include that controlled coremaking piece 121 controls the
One control switch 122, the second control switch 123, third control switch 124 and the 4th control switch 125 are opened by four controls
The control of pass is, it can be achieved that the anode of MIC21 and the connection of MIC pin of audio processing modules 3 and the negative terminal of MIC21 and sound
The connection of the ground pin of frequency processing module 3.
Due to the existing respective tube for also needing to realize that the anode of MIC21, negative terminal correspond to audio processing modules 3 in the related technology
The connection of foot, so, the implementation of any existing way can meet the above demand, and not depart from retouching for the utility model embodiment
It states.
As it can be seen that the decision circuitry of earphone MIC positive and negative terminal provided by the utility model finds and utilizes the negative terminal and two of MIC
The electric circuit characteristic of the common end connection of a lines of loudspeakers breaches and existing thinks judge that MIC positive and negative terminal should be directly in the related technology
The technology prejudice for detecting corresponding positive and negative terminal voltage is connect, in turn, positive and negative terminal can determine whether by one-shot measurement.As it can be seen that this is practical new
Type can effectively simplify process flow, improve treatment effeciency, simultaneously as only needing one-shot measurement, the utility model is also no longer needed
Two sets of detection devices are wanted, the saving of cost can be conducive to.
In the utility model, since the utility model is not required to detection twice, detected data can be directly compared,
And then digitized processing is no longer necessary means with caching, can be advantageously implemented other lower-cost detection means,
It is no longer limited to the mode of ADC, it is seen then that it may also be advantageous for reducing cost, for this, the further optinal plan of the utility model
Can be used compared with current voltage that comparator will test carries out directly with reference voltage value, further reduced device at
This.
Fig. 8 is the circuit diagram of electronic equipment and earphone in the utility model embodiment.
Referring to FIG. 8, having access to the electronic equipment 4 of earphone, including earphone MIC involved in above each optinal plan is just
The decision circuitry 1 of negative terminal.
In one of embodiment, electronic equipment 4 further includes interface module 41, and the interface module 41 is separately connected
The control module 12 and the comparison module 11.
When the earphone 2 accesses the interface module 41, the control module 12 is distinguished by the interface module 41
It is connected to the both ends of the MIC21.
When the earphone 2 accesses the interface module 41, the comparison module 11 is connected by the interface module 41
Extremely at least one of described two lines of loudspeakers 22.
In specific implementation process, interface module 41 may include the first interface portion of the first end of link control module 12
The second interface component of the second end of part and link control module 12, first interface component can access electronic equipment in earphone 2
The first end of MIC21 is connected when 4, second interface component connects the of the MIC21 when the earphone 2 accesses electronic equipment 4
Two ends, such as first interface component can be connect with the SBU1 pin in earphone 2 with SBU2 pin with second interface component.
Interface module 41 may also include the third interface unit of connection comparison module, and third interface unit can connect in earphone 2
Corresponding lines of loudspeakers 22 is connected when entering electronic equipment 4.
In one of embodiment, the electronic equipment 4 is following one of any: mobile phone, computer, tablet computer,
And verbal system.
Fig. 9 is a kind of flow diagram of the judgment method of earphone MIC positive and negative terminal in the utility model embodiment.
Referring to FIG. 9, the judgment method of earphone MIC positive and negative terminal, comprising:
S11: arbitrary first end injection exciting current in the both ends of the MIC is controlled, and controls the two of the MIC
The second end of another in end is connected to ground.
S12: the current voltage of corresponding position in acquisition at least one of them lines of loudspeakers.
S13: the current voltage and preset reference voltage value.
S14: whether the current voltage is higher than the reference voltage value.
If so, implementation steps S15: determining that the first end is the negative terminal of the MIC, the second end is the MIC
Anode.
If it is not, then implementation steps S16: determining that the first end is the anode of the MIC, the second end is the MIC
Negative terminal.
In addition, method shown in the present embodiment, accordingly can be used for implementing the technical solution of Fig. 1 to embodiment illustrated in fig. 8,
The meaning of its realization principle, technical effect and term is similar, and details are not described herein again.
In conclusion the utility model finds and the negative terminal of MIC is utilized to connect with the common end of two lines of loudspeakers
Electric circuit characteristic breaches the existing technology for thinking to judge that MIC positive and negative terminal should directly detect corresponding positive and negative terminal voltage in the related technology
Prejudice.In turn, the utility model is by comparing current provided by the connection of module and lines of loudspeakers and the hardware configuration
Compared with reference voltage value survey can be completed under hardware access provided by it by the design of hardware configuration in voltage
Examination, measures twice without implementing in process, effectively simplifies process flow, treatment effeciency is improved, simultaneously as only need to once survey
Amount, the utility model also no longer need two sets of detection devices, can be conducive to the saving of cost.
In the utility model, since the utility model is not required to detection twice, detected data can be directly compared,
And then digitized processing is no longer necessary means with caching, can be advantageously implemented other lower-cost detection means,
It is no longer limited to the mode of ADC, it is seen then that it may also be advantageous for reducing cost, for this, the further optinal plan of the utility model
Can be used compared with current voltage that comparator will test carries out directly with reference voltage value, further reduced device at
This.
Finally, it should be noted that the above various embodiments is only to illustrate the technical solution of the utility model, rather than it is limited
System；Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should
Understand: it is still possible to modify the technical solutions described in the foregoing embodiments, or to some or all of
Technical characteristic is equivalently replaced；And these are modified or replaceed, it does not separate the essence of the corresponding technical solution, and this is practical new
The range of each embodiment technical solution of type.
Claims (10)
1. a kind of decision circuitry of earphone MIC positive and negative terminal, the earphone is Type-C earphone, wherein the negative terminal of MIC is raised with two
The common end of sound device route connects, which is characterized in that the decision circuitry of the earphone MIC positive and negative terminal, comprising: comparison module and control
Molding block；
The control module is connected directly or indirectly to the both ends of the MIC, arbitrary one in the both ends to control the MIC
First end injects exciting current, and controls in the both ends of the MIC another second end and be connected to ground through analog switch；
The comparison module is connected at least one of two lines of loudspeakers of the earphone, to acquire the lines of loudspeakers
The current voltage of middle corresponding position；
The comparison module is also connected with the control module, the use that the current voltage and preset reference voltage value are obtained
In judging the first end and the positive and negative comparison result information of the second end is sent to control module.
2. the decision circuitry of earphone MIC positive and negative terminal according to claim 1, which is characterized in that the comparison result information
Including the first comparison result information, the comparison module is specifically used for when the current voltage is higher than the reference voltage value,
The first comparison result information is sent to the control module.
3. the decision circuitry of earphone MIC positive and negative terminal according to claim 1, which is characterized in that the comparison result information
Including the second comparison result information, the comparison module is specifically used for when the current voltage is lower than the reference voltage value,
The second comparison result information is sent to the control module.
4. the decision circuitry of earphone MIC positive and negative terminal according to any one of claims 1 to 3, which is characterized in that the comparison
Module includes comparator, and the first input end of the comparator inputs the current voltage, the second input terminal of the comparator
The reference voltage value is inputted, the output end of the comparator connects the control module, to send institute to the control module
State comparison result information.
5. the decision circuitry of earphone MIC positive and negative terminal according to claim 4, which is characterized in that the first of the comparator
Input terminal is connected to the common end of two lines of loudspeakers through earphone speaker.
6. the decision circuitry of earphone MIC positive and negative terminal according to any one of claims 1 to 3, which is characterized in that the control
Module is also respectively connected with the MIC pin and ground pin of audio processing modules, to determine the first end and the second end
Positive and negative terminal after, control the MIC pin for being just connected to audio processing modules of the MIC, and the negative terminal for controlling the MIC is connected to
The ground pin of the audio processing modules.
7. a kind of electronic equipment for having access to earphone, which is characterized in that including earphone as claimed in any one of claims 1 to 6
The decision circuitry of MIC positive and negative terminal.
8. the electronic equipment according to claim 7 for having access to earphone, which is characterized in that it further include interface module, institute
It states interface module and is separately connected the control module and the comparison module；
When the earphone accesses the interface module, the control module is respectively connected to described by the interface module
The both ends of MIC；
When the earphone accesses the interface module, the comparison module is connected to described two raise by the interface module
At least one of sound device route.
9. the electronic equipment according to claim 8 for having access to earphone, which is characterized in that the interface module includes connecting
The first interface component of the first end of the control module is connect, and connects the second interface portion of the second end of the control module
Part, the first interface component connect the first end of the MIC when the earphone accesses the electronic equipment, and described second connects
Mouthpiece connects the second end of the MIC when the earphone accesses the electronic equipment.
10. the electronic equipment according to any one of claims 7 to 9 for having access to earphone, which is characterized in that the electronics
Equipment is following one of any: mobile phone, computer, tablet computer and verbal system.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920405520.9U CN209314034U (en) | 2019-03-27 | 2019-03-27 | The decision circuitry and electronic equipment of earphone MIC positive and negative terminal |
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| CN201920405520.9U CN209314034U (en) | 2019-03-27 | 2019-03-27 | The decision circuitry and electronic equipment of earphone MIC positive and negative terminal |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109769174A (en) * | 2019-03-27 | 2019-05-17 | 上海爻火微电子有限公司 | Decision circuitry, method and the electronic equipment of earphone MIC positive and negative terminal |
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2019
- 2019-03-27 CN CN201920405520.9U patent/CN209314034U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109769174A (en) * | 2019-03-27 | 2019-05-17 | 上海爻火微电子有限公司 | Decision circuitry, method and the electronic equipment of earphone MIC positive and negative terminal |
| CN109769174B (en) * | 2019-03-27 | 2024-04-12 | 上海爻火微电子有限公司 | Judging circuit and method for positive and negative terminals of MIC (microphone) of earphone and electronic equipment |
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