CN107172515A - Test earphone plug is inserted in mobile terminal detection circuit and mobile terminal - Google Patents
Test earphone plug is inserted in mobile terminal detection circuit and mobile terminal Download PDFInfo
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- CN107172515A CN107172515A CN201710358890.7A CN201710358890A CN107172515A CN 107172515 A CN107172515 A CN 107172515A CN 201710358890 A CN201710358890 A CN 201710358890A CN 107172515 A CN107172515 A CN 107172515A
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- headset
- detection circuit
- voltage
- mobile terminal
- detection
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
- H04R1/1041—Mechanical or electronic switches, or control elements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2420/00—Details of connection covered by H04R, not provided for in its groups
- H04R2420/05—Detection of connection of loudspeakers or headphones to amplifiers
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- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Headphones And Earphones (AREA)
Abstract
The embodiment of the present invention provides the detection circuit and mobile terminal that test earphone plug is inserted in a kind of mobile terminal.The detection circuit that test earphone plug is inserted in mobile terminal of the present invention, the first input end of the detection circuit is electrically connected with the headset detection pin of main control chip in mobile terminal, second input of the detection circuit is electrically connected with a constant voltage, and the constant voltage is less than the minimum voltage for being not inserted into headset detection pin during headset plug；The detection circuit is used for the voltage and the constant voltage for comparing the headset detection pin, and when the voltage of the headset detection pin is less than the constant voltage, the first level is exported to the I/O pins of the main control chip；The main control chip is used to be inserted according to the first level detection headset plug of the I/O pins.The embodiment of the present invention can reduce the probability of mobile terminal misrecognition headset plug insertion.
Description
Technical field
The present embodiments relate to the detection that test earphone plug in electronic technology, more particularly to a kind of mobile terminal is inserted
Circuit and mobile terminal.
Background technology
Earphone is a kind of converting unit, and it receives the electric signal that media player or receiver are sent, using pressing close to ear
Piece loudspeaker convert it into the sound wave that can be heard.Earphone is typically, profit separable with media player or receiver
Connected with a plug.With continuing to develop for Mobile terminal equipment, earphone is widely used in mobile phone, walkman, radio reception
Machine, portable electronic game and digital music player etc..
Headset plug with Mike's function is usually the plug of four-part form, and Fig. 1 is the knot of existing four-section type headset plug
Structure schematic diagram, as shown in figure 1, being followed successively by L channel section (L), R channel section (R), signal circuit from headset plug end to tip
Section (G) and transmitter section (M).Wherein, L channel section (L) and the L channel connection of mobile terminal, it is mobile whole for transmitting
The audio signal of L channel output, R channel section (R) and the R channel connection of mobile terminal are held, for transmitting mobile terminal
The audio signal of R channel output, signal circuit section (G) and the signal circuit connection of mobile terminal, for being grounded, send words
The transmitter connection of device section (M) and mobile terminal, for mobile terminal input audio signal.
It is adapted with the structure of above-mentioned headset plug, the interface of the earphone socket of mobile terminal is as shown in Fig. 2 earphone socket
Including headset detection pin (DET '), left channel pin (L '), right channel pin (R '), GND pin and MIC pins.Wherein,
When being not inserted into headset plug, the headset detection pin DET of main control chip voltage is 1.8V in mobile terminal, when headset detection is drawn
When pin DET voltage is less than 1.62V, mobile terminal determines there is headset plug insertion according to headset detection pin DET change, from
And carry out the operation of next step.
However, above-mentioned judge the mode whether headset plug inserts, there is problems with：When conducting medium (such as water) enters
When entering earphone socket, conducting medium can be by headset detection pin (DET ') and left channel pin (L ') or earphone ground pin (GND)
Short circuit so that the headset detection pin DET of main control chip voltage pull-down in mobile terminal, usually 0.5V is between 1.4V,
Less than threshold voltage 1.62V, so as to cause mobile terminal to misidentify headset plug insertion.
The content of the invention
The embodiment of the present invention provides the detection circuit and mobile terminal that test earphone plug is inserted in a kind of mobile terminal, with
Reduce the probability of mobile terminal misrecognition headset plug insertion.
In a first aspect, the embodiment of the present invention provides the detection circuit that test earphone plug is inserted in a kind of mobile terminal, the
One input is electrically connected with the headset detection pin of main control chip in mobile terminal, and the second input is electrically connected with a constant voltage
Connect, the constant voltage is less than the minimum voltage for being not inserted into headset detection pin during headset plug；
The detection circuit is used for the voltage and the constant voltage for comparing the headset detection pin, and when the earphone
When detecting that the voltage of pin is less than the constant voltage, the first level is exported to the I/O pins of the main control chip；
The main control chip is used to be inserted according to the first level detection headset plug of the I/O pins.
Second aspect, the embodiment of the present invention provides a kind of mobile terminal, including detection circuit as described in relation to the first aspect and
Main control chip.
Phase is inserted with the headset detection pin DET test earphones plug in the prior art by main control chip in mobile terminal
Than whether the present invention is inserted using the common test earphone plug of headset detection pin DET and I/O pins of main control chip, specifically
Ground, by setting the detection circuit that test earphone plug is inserted in mobile terminal, the first input end of the detection circuit and movement
The headset detection pin electrical connection of main control chip in terminal, the second input of detection circuit is electrically connected with a constant voltage, permanent
Threshold voltage is less than the minimum voltage of headset detection pin when being not inserted into headset plug (when being not inserted into headset plug, situations such as water inlet
The voltage of headset detection pin can be caused to decline), the detection circuit compares the voltage and constant voltage of headset detection pin, and works as
The voltage of headset detection pin be less than constant voltage when, to main control chip I/O pins export the first level, main control chip according to
First level detection headset plug is inserted, and is whether the correct test earphone plug of main control chip is inserted there is provided being effectively ensured, from
And misrecognition is prevented effectively from, to reduce the probability of mobile terminal misrecognition headset plug insertion.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the accompanying drawing used required in technology description to be briefly described, it should be apparent that, drawings in the following description are this hairs
Some bright embodiments, for those of ordinary skill in the art, without having to pay creative labor, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is the structural representation of existing four-section type headset plug；
Fig. 2 is the structural representation of the pin of earphone socket of the present invention；
Fig. 3 is the structural representation of the detection embodiment one of circuit 1 of test earphone plug insertion in mobile terminal of the present invention；
Fig. 4 is the structural representation of the detection circuit embodiments two of test earphone plug insertion in mobile terminal of the present invention；
Fig. 5 is the structural representation of the detection circuit embodiments three of test earphone plug insertion in mobile terminal of the present invention；
Fig. 6 is the structural representation of mobile terminal embodiment one of the present invention；
Fig. 7 is flow chart of the present invention using the embodiment of the method one for detecting the identification of circuit realiration headset plug.
Fig. 8 is flow chart of the present invention using the embodiment of the method two for detecting the identification of circuit realiration headset plug.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
A part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art
The every other embodiment obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.
Term " first ", " second ", " the 3rd " in description and claims of this specification and above-mentioned accompanying drawing, "
The (if present)s such as four " are for distinguishing similar object, without for describing specific order or precedence.It should manage
The data that solution is so used can be exchanged in the appropriate case, so as to embodiments of the invention described herein for example can with except
Order beyond those for illustrating or describing herein is implemented.In addition, term " comprising " and " having " and theirs is any
Deformation, it is intended that covering is non-exclusive to be included, for example, containing the process of series of steps or unit, method, system, production
Product or equipment are not necessarily limited to those steps clearly listed or unit, but may include not list clearly or for this
A little processes, method, product or the intrinsic other steps of equipment or unit.
" multiple " involved by this paper refer to two or more."and/or", describes the incidence relation of affiliated partner,
Expression may have three kinds of relations, for example, A and/or B, can be represented：Individualism A, while there is A and B, individualism B this
Three kinds of situations.It is a kind of relation of "or" that character "/", which typicallys represent forward-backward correlation object,.
Earphone socket involved by this paper refers specifically to the socket being connected in mobile terminal with headset plug, and the earphone socket can
With the socket for being the socket that matches with three-section earphone plug or matching with four-section type headset plug, the present invention
Embodiment is done by taking the earphone socket matched with four-section type headset plug as shown in Figure 1 as an example for example, the earphone socket
Specifically can be with as shown in Fig. 2 the embodiment of the present invention be in this, as limitation.Headset plug is connected by connecting line with equipment,
The equipment can be earphone or self-shooting bar etc..Specifically, continuing to develop with electronic technology, is only applicable to before
The earphone socket of headset plug is inserted, be used to that other equipment, such as self-shooting bar can be connected.Inserted with the earphone for lifting mobile terminal
The utilization rate of seat, more multifunctional application is provided the user by the equipment being connected with earphone socket.
Mobile terminal involved by this paper, refers to the equipment (device) for providing a user voice and/or data connectivity, bag
Include wireless terminal or catv terminal.Wireless terminal can be portable equipment with wireless connecting function or be connected to wireless
Other processing equipments of modem, the mobile terminal communicated through wireless access network with one or more core nets.Example
Such as, wireless terminal can be mobile phone (or being " honeycomb " phone) and the computer with mobile terminal.And for example, it is wireless whole
End can also be portable, pocket, hand-held, built-in computer or vehicle-mounted mobile device.For another example, wireless terminal
Can be with smart mobile phone, tablet personal computer, intelligent watch etc..
The structure for the embodiment one of detection circuit 1 whether Fig. 3 inserts for test earphone plug in mobile terminal of the present invention is shown
It is intended to, as shown in figure 3, the first input end 11 of detection circuit 1 of the present embodiment is examined with the earphone of main control chip 2 in mobile terminal
Pin DET (pin 22) electrical connections are surveyed, the second input 12 of the detection circuit 1 is electrically connected with a constant voltage, constant electricity
Pressure is less than the minimum voltage of headset detection pin DET when being not inserted into headset plug.I.e. the constant voltage is less than being not inserted into earphone
The positive count of headset detection pin DET minimum voltage during plug.A kind of specifically achievable mode, the constant voltage is more than
0 and less than 0.5V, such as constant voltage can be 0.35V.
Wherein, the detection circuit 1 is used for the voltage and the constant voltage for comparing headset detection pin DET, and works as earphone
When detecting that pin DET 22 voltage is less than the constant voltage, to input/output (Input/Output, letter of the main control chip 2
Claim I/O) the first level of output of pin 21, the main control chip 2 is for the first level detection headset plug according to the I/O pins 21
Insertion.
Specifically, a kind of achievable mode is：It is high level to set the first level, and main control chip 2 is true according to the high level
Determine headset plug insertion earphone socket.
Another achievable mode is：It is low level to set the first level, and main control chip 2 determines earphone according to the low level
Plug inserts earphone socket.
Wherein, high level, for example, can be 1.8V, low level for example can be 0V.It will of course be understood that, can also
It is other values to set high level, low level.
Optionally, the detection circuit 1 can be also used for when headset detection pin DET voltage is more than the constant voltage,
The second electrical levels different from the first level are exported to the I/O pins 21, the main control chip 2 can be also used for according to I/O pins 21
Second electrical level test earphone plug be not inserted into.
Specifically, a kind of achievable mode is：It is high level to set the first level, and main control chip 2 is true according to the high level
Determine headset plug insertion earphone socket, setting second electrical level is low level, and main control chip 2 is inserted according to the second electrical level test earphone
Head is not inserted into.
Another achievable mode is：It is low level to set the first level, and main control chip 2 determines earphone according to the low level
Plug inserts earphone socket, and setting second electrical level is high level, and main control chip 2 is not inserted according to the second electrical level test earphone plug
Enter.
Wherein, high level, for example, can be 1.8V, low level for example can be 0V.It will of course be understood that, can also
It is other values to set high level, low level.
Above-mentioned embodiment can flexibly be set according to demand, and the embodiment of the present invention is not in this, as limit
System.Following embodiments are illustrated so that the first level is low level, second electrical level is high level as an example.
The mobile terminal of the detection circuit 1 of the embodiment of the present invention is provided with, when the earphone socket of mobile terminal is not inserted into ear
During machine transplanting of rice head, headset detection pin DET (pin 22) magnitude of voltage is 1.8V, detects the voltage of the first input end 11 of circuit 1
Value is also 1.8V, and detects the magnitude of voltage of the second input 12 of circuit 1 for the constant voltage, and the constant voltage, which is less than, to be not inserted into
Headset detection pin DET minimum voltage during headset plug, so, the magnitude of voltage of first input end 11 is more than the second input 12
Magnitude of voltage, the output high level of output end 13 of detection circuit 1, such as 1.8V, main control chip 2 determines earphone according to the high level
Headset plug is not inserted into socket.Headset plug is wherein not inserted into earphone socket includes two states：(1) do not have in earphone socket
There is headset plug；(2) headset plug is extracted from earphone socket.
As can be seen here, main control chip 2 is when the magnitude of voltage of I/O pins 21 is high level, it may be determined that in earphone socket not
Headset plug is inserted, main control chip 2 can also determine ear when it is high level that the magnitude of voltage of I/O pins 21 is by low level upset
Headset plug is not inserted into machine transplanting of rice seat.
When the earphone socket of mobile terminal inserts headset plug, headset detection pin DET ' is led with left channel pin L '
It is logical, specifically, due to each section of headset plug (by taking Fig. 1 as an example) be insulator, headset plug insertion between conductor, adjacent segment
During earphone, headset detection pin DET (pin 22) as shown in Figure 3 and left channel pin L (pin 23) respectively with as shown in Figure 1
One section of headset plug low order end connection, headset detection pin DET and left channel pin L is turned on by the section, L channel
Pin L can be grounded, then headset detection pin DET voltage is also 0, detects the magnitude of voltage of the first input end 11 of circuit 1
For 0V, and detect that the magnitude of voltage of the second input 12 of circuit 1 is the constant voltage, so, the magnitude of voltage of first input end 11
Less than the magnitude of voltage of the second input 12, the output low level of output end 13 of detection circuit 1, such as 0V, main control chip 2 is according to this
Low level determines to insert headset plug in earphone socket.Headset plug is inserted wherein in earphone socket includes two states：(1) ear
There is headset plug in machine transplanting of rice seat；(2) in headset plug insertion earphone socket.
As can be seen here, main control chip 2 is when the magnitude of voltage of I/O pins 21 is low level, it may be determined that inserted in earphone socket
Enter headset plug, main control chip 2 can also determine earphone when it is low level that the magnitude of voltage of I/O pins 21 is by high level upset
Headset plug is inserted in socket.
For the embodiment of the present invention earphone socket water inlet when, headset detection pin DET (pin 22) and left channel pin L
(pin 23) formation micro-short circuit, headset detection pin DET (pin 22) voltage is 0.5V to 1.4V, the first of detection circuit 1
The magnitude of voltage of input 11 is also 0.5V to 1.4V, that is, headset detection pin DET (pin 22) is most when being not inserted into headset plug
Small voltage is 0.5V, and detects the magnitude of voltage of the second input 12 of circuit 1 for constant voltage, and the constant voltage, which is less than, to be not inserted into
Headset detection pin DET (pin 22) minimum voltage during earphone, the constant voltage is more than 0V and less than 0.5, so, first is defeated
The magnitude of voltage for entering end 11 is more than the magnitude of voltage of the second input 12, the output high level of output end 13 of detection circuit 1, Ke Yiwei
1.8V, main control chip 2 determines to be not inserted into headset plug in earphone socket according to the high level.So as to the feelings intake in earphone socket
Under condition, it can also correctly recognize and headset plug is not inserted into earphone socket, be prevented effectively from misrecognition.
It should be noted that above-mentioned detection circuit 1 can be specifically comparator or power switch pipe, the master control
Chip 2 can be realized by software and/or hardware.
Optionally, the detection circuit 1 of the embodiment of the present invention can specifically include comparator or power switch pipe, the power
Switching tube can be triode, FET etc., the above-mentioned functions for realizing detection circuit 1.
The present embodiment, by the detection circuit for setting test earphone plug in mobile terminal to insert, the of the detection circuit
One input is electrically connected with the headset detection pin of main control chip in mobile terminal, detects the second input and a constant of circuit
Voltage is electrically connected, and constant voltage is less than the minimum voltage of headset detection pin when being not inserted into headset plug, and the detection circuit compares
The voltage and constant voltage of headset detection pin, and when the voltage of headset detection pin is less than constant voltage, to main control chip
I/O pins export the first level, main control chip insert according to the first level detection headset plug, wherein, detected due to setting
Circuit, and the second input and the constant less than the minimum voltage of headset detection pin when being not inserted into headset plug of detection circuit
Voltage electricity electrical connection, detection circuit works as headset detection pin by comparing the voltage and the constant voltage of headset detection pin
Voltage export the first level to main control chip when being less than the constant voltage, be that the insertion of main control chip correct test earphone plug is carried
Supply to be effectively ensured, so that misrecognition is prevented effectively from, to reduce the probability of mobile terminal misrecognition headset plug insertion.
Several specific embodiments are used below, and the technical scheme to embodiment illustrated in fig. 3 is described in detail.
Fig. 4 is the structural representation of the detection circuit embodiments two of test earphone plug insertion in mobile terminal of the present invention,
As shown in figure 4, on the basis of structure shown in Fig. 3, the perseverance electrically connected with the second input 12 of detection circuit 1 of the present embodiment
Threshold voltage can be provided by bleeder circuit 3, and the voltage that the bleeder circuit 3 is used for the power supply 4 to detecting circuit 1 is divided
Pressure.
Wherein, as shown in figure 4, the left channel pin L (pin 23) of main control chip 2 or earphone socket in mobile terminal
Resistance R can be connected between left channel pin L ' and ground2, the headset detection pin DET ' and master of earphone socket in mobile terminal
Resistance R can be connected between the headset detection pin DET (pin 22) for controlling chip 21。
A kind of specifically achievable mode bleeder circuit 3 can specifically include：Resistance R3With resistance R4.Wherein, resistance R3
One end be connected with power supply 4, the other end respectively with resistance R4One end connection and the second input 12 connect, resistance R4
The other end ground connection.
Optionally, the power supply 4 can also be with detecting that the power input VCC of circuit 1 is connected.
Specifically, the detection circuit 1 of the embodiment of the present invention is illustrated in figure 4 comparator, the first input end of circuit 1 is detected
11 be the IN+ shown in Fig. 4, and the second input 12 of detection circuit 1 is the IN- shown in Fig. 4.
Wherein, the magnitude of voltage of power supply 5 can be 1.8V.On the one hand, the power supply 5 by bleeder circuit 5 to inspection
Second input 12 of slowdown monitoring circuit 1 provides magnitude of voltage, i.e., above-mentioned constant voltage, and the constant voltage is more than 0V and less than 0.5.It is another
Aspect, the power supply 5 provides supply voltage to detection circuit 1.Optionally, it can also be set between the power supply 5 and ground
Electric capacity C2.
The present embodiment, by the detection circuit for setting test earphone plug in mobile terminal to insert, the of the detection circuit
One input is electrically connected with the headset detection pin of main control chip in mobile terminal, detects the second input and a constant of circuit
Voltage is electrically connected, and constant voltage is less than the minimum voltage of headset detection pin when being not inserted into headset plug, and the detection circuit compares
The voltage and constant voltage of headset detection pin, and when the voltage of headset detection pin is less than constant voltage, to main control chip
I/O pins export the first level, main control chip insert according to the first level detection headset plug, wherein, detected due to setting
Circuit, and the second input and the constant less than the minimum voltage of headset detection pin when being not inserted into headset plug of detection circuit
Voltage electricity electrical connection, detection circuit works as headset detection pin by comparing the voltage and the constant voltage of headset detection pin
Voltage export the first level to main control chip when being less than the constant voltage, be that the insertion of main control chip correct test earphone plug is carried
Supply to be effectively ensured, so that misrecognition is prevented effectively from, to reduce the probability of mobile terminal misrecognition headset plug insertion.
Further, by setting bleeder circuit 3 to realize the power supply electricity by providing supply voltage to detection circuit 1
Source 5, to detect that the second input 12 of circuit 1 provides constant voltage, to ensure correct detection that whether headset plug inserts.
The structural representation for the detection circuit embodiments three whether Fig. 5 inserts for test earphone plug in mobile terminal of the present invention
Figure, as shown in figure 5, on the basis of structure shown in Fig. 3 or Fig. 4, the detection circuit 1 of the present embodiment can also include：Filtered electrical
Road 6.The filter circuit 6 includes resistance R5With electric capacity C1.Resistance R5It is connected to first input end 11 and the headset detection pin
Between DET (pin 22).Electric capacity C1 one end is connected with first input end 11, electric capacity C1 other end ground connection.
Optionally, resistance R5For 20K ohm, electric capacity C1 is 82nF.
The present embodiment, by the detection circuit for setting test earphone plug in mobile terminal to insert, the of the detection circuit
One input is electrically connected with the headset detection pin of main control chip in mobile terminal, detects the second input and a constant of circuit
Voltage is electrically connected, and constant voltage is less than the minimum voltage of headset detection pin when being not inserted into headset plug, and the detection circuit compares
The voltage and constant voltage of headset detection pin, and when the voltage of headset detection pin is less than constant voltage, to main control chip
I/O pins export the first level, main control chip insert according to the first level detection headset plug, wherein, detected due to setting
Circuit, and the second input and the constant less than the minimum voltage of headset detection pin when being not inserted into headset plug of detection circuit
Voltage electricity electrical connection, detection circuit works as headset detection pin by comparing the voltage and the constant voltage of headset detection pin
Voltage export the first level to main control chip when being less than the constant voltage, be that the insertion of main control chip correct test earphone plug is carried
Supply to be effectively ensured, so that misrecognition is prevented effectively from, to reduce the probability of mobile terminal misrecognition headset plug insertion.
Further, by setting bleeder circuit 3 to realize the power supply electricity by providing supply voltage to detection circuit 1
Source 5, to detect that the second input 12 of circuit 1 provides constant voltage, to ensure correct detection that whether headset plug inserts.
Further, by setting filter circuit 6, it is possible to prevente effectively from the generation of situations below：In insertion headset plug
Media play is carried out, when the voltage peak-to-peak value of headset plug L channel section (L) is larger, detects that the IN+ of circuit 1 voltage is excessive,
Cause IN+>IN-, the voltage for detecting the output end of circuit 1 is 1.8V, so that what main control module was exported according to detection module
Voltage detecting goes out headset plug extraction, causes erroneous judgement.
In any of the above-described embodiment, resistance R1Resistance can be specifically 20K ohm, resistance R is set1, for preventing ear
The microphone of machine can not be used.
Fig. 6 is the structural representation of mobile terminal embodiment one of the present invention, as shown in fig. 6, the mobile terminal can include
Detection circuit and main control chip as described in above-mentioned any embodiment.Wherein, the concrete function and structure of detection circuit can join
See the explanation of above-described embodiment, its implementing principle and technical effect is similar, and here is omitted.
Wherein, the main control chip be additionally operable to detect headset plug insertion when, obtain left channel pin to ground resistance
It is anti-, and the device type for determining to be connected with the headset plug according to the earth impedance.
The main control chip is additionally operable to, when the earth impedance is less than the first predetermined threshold value, determine that the device type is
Earphone, and when the earth impedance is more than the second predetermined threshold value, it is self-shooting bar to determine the device type.
Optionally, the first predetermined threshold value is specifically as follows 600 ohm, and the second predetermined threshold value is specifically as follows 1000 ohm,
Other values can certainly be chosen, the embodiment of the present invention is not in this, as limitation.
The mobile terminal of the embodiment of the present invention is by setting detection circuit and main control chip, it is possible to prevente effectively from misrecognition,
To reduce the probability of mobile terminal misrecognition headset plug insertion.
Further, by obtaining the earth impedance of left channel pin, and determined and the ear according to the earth impedance
The device type of machine transplanting of rice head connection, so as to realize that pair equipment being connected with headset plug is effectively recognized.
It can realize that headset plug inserts the correct detection of earphone socket using the detection circuit of any of the above-described embodiment.Under
Method for distinguishing is known to the specific detection circuit realiration headset plug using the embodiment of the present invention by one embodiment and carried out in detail in face
Describe in detail bright.
Fig. 7 is flow chart of the present invention using the embodiment of the method one for detecting the identification of circuit realiration headset plug, such as Fig. 7 institutes
Show, the method for the present embodiment can include：
Step 701, to detect circuit first input end magnitude of voltage and constant voltage be compared.
If step 702, the magnitude of voltage of the first input end of detection circuit are more than constant voltage, detect that the output end of circuit is defeated
Go out high level, determined to be not inserted into headset plug in earphone socket according to high level.
If step 703, the magnitude of voltage of the first input end of detection circuit are less than constant voltage, detect that the output end of circuit is defeated
Go out low level, determined to insert headset plug in earphone socket according to low level.
The present embodiment, voltage and the constant electricity of the headset detection pin being connected by detecting circuit to compare with first input end
Pressure, and high level or low level are exported according to comparative result, whether inserted according to high level or low level test earphone plug, its
In, detection circuit is whether correct test earphone plug is inserted there is provided being effectively ensured, so that misrecognition is prevented effectively from, to reduce
The probability of mobile terminal misrecognition headset plug insertion.
Fig. 8 is flow chart of the present invention using the embodiment of the method two for detecting the identification of circuit realiration headset plug, such as Fig. 8 institutes
Show, on the basis of embodiment illustrated in fig. 7, can also pair device type being connected with headset plug be identified, the present embodiment
Method can include：
If step 801, the magnitude of voltage of the first input end of detection circuit are less than constant voltage, detect that the output end of circuit is defeated
Go out low level, headset plug is inserted in the earphone socket that mobile terminal is determined according to low level.
Step 802, the earth impedance for obtaining left channel pin.
Step 803, judge the earth impedance whether be less than 600 ohm, or the earth impedance be more than 1000 ohm.
If the earth impedance is less than 600 ohm, step 804 is performed, if the earth impedance is more than 1000 ohm, step is performed
805。
The device type that step 804, determination are connected with headset plug is earphone.
The device type that step 805, determination are connected with headset plug is self-shooting bar.
When in the earphone socket for detecting mobile terminal insert headset plug when, by obtain left channel pin to ground resistance
It is anti-, and the device type for determining be connected with the headset plug according to the earth impedance, so as to realize pair and headset plug company
The equipment connect is effectively recognized.
One of ordinary skill in the art will appreciate that：Realizing all or part of step of above-mentioned each method embodiment can lead to
The related hardware of programmed instruction is crossed to complete.Foregoing program can be stored in a computer read/write memory medium.The journey
Sequence upon execution, performs the step of including above-mentioned each method embodiment；And foregoing storage medium includes：ROM, RAM, magnetic disc or
Person's CD etc. is various can be with the medium of store program codes.
Finally it should be noted that：Various embodiments above is merely illustrative of the technical solution of the present invention, rather than its limitations；To the greatest extent
The present invention is described in detail with reference to foregoing embodiments for pipe, it will be understood by those within the art that：Its according to
The technical scheme described in foregoing embodiments can so be modified, or which part or all technical characteristic are entered
Row equivalent substitution；And these modifications or replacement, the essence of appropriate technical solution is departed from various embodiments of the present invention technology
The scope of scheme.
Claims (10)
1. the detection circuit that test earphone plug is inserted in a kind of mobile terminal, it is characterised in that first input end is whole with movement
The headset detection pin electrical connection of main control chip in end, the second input is electrically connected with a constant voltage, and the constant voltage is small
The minimum voltage of headset detection pin when headset plug is not inserted into；
The detection circuit is used for the voltage and the constant voltage for comparing the headset detection pin, and when the headset detection
When the voltage of pin is less than the constant voltage, the first level is exported to the I/O pins of the main control chip；
The main control chip is used to be inserted according to the first level detection headset plug of the I/O pins.
2. detection circuit according to claim 1, it is characterised in that the detection circuit is additionally operable to work as the headset detection
When the voltage of pin is more than the constant voltage, the second electrical levels different from first level are exported to the I/O pins；
The main control chip is additionally operable to be not inserted into according to the second electrical level test earphone plug of the I/O pins.
3. detection circuit according to claim 1 or 2, it is characterised in that the constant voltage is provided by a bleeder circuit,
The bleeder circuit is used to carry out partial pressure to the voltage of the power supply of the detection circuit.
4. detection circuit according to claim 3, it is characterised in that the bleeder circuit includes first resistor and the second electricity
Resistance；
One end of the first resistor is connected with the power supply, the other end be connected respectively with one end of the second resistance with
And the second input connection, the other end ground connection of the second resistance.
5. detection circuit according to claim 1 or 2, it is characterised in that the detection circuit includes comparator or work(
Rate switching tube.
6. detection circuit according to claim 1 or 2, it is characterised in that the detection circuit also include 3rd resistor and
First electric capacity；
The 3rd resistor is connected between the first input end and the headset detection pin；
One end of first electric capacity is connected with the first input end, other end ground connection.
7. detection circuit according to claim 1 or 2, it is characterised in that the constant voltage is more than 0 and less than 0.5V.
8. a kind of mobile terminal, it is characterised in that including the detection circuit and master control core as any one of claim 1-7
Piece.
9. mobile terminal according to claim 8, it is characterised in that the main control chip is additionally operable to insert detecting earphone
During head insertion, the earth impedance of left channel pin is obtained, and determine what is be connected with the headset plug according to the earth impedance
Device type.
10. mobile terminal according to claim 9, it is characterised in that the main control chip is additionally operable to described to ground resistance
When resisting less than the first predetermined threshold value, it is earphone to determine the device type, and is more than the second default threshold in the earth impedance
During value, it is self-shooting bar to determine the device type.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710358890.7A CN107172515A (en) | 2017-05-19 | 2017-05-19 | Test earphone plug is inserted in mobile terminal detection circuit and mobile terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710358890.7A CN107172515A (en) | 2017-05-19 | 2017-05-19 | Test earphone plug is inserted in mobile terminal detection circuit and mobile terminal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107172515A true CN107172515A (en) | 2017-09-15 |
Family
ID=59815800
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710358890.7A Pending CN107172515A (en) | 2017-05-19 | 2017-05-19 | Test earphone plug is inserted in mobile terminal detection circuit and mobile terminal |
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| CN110213686A (en) * | 2019-05-28 | 2019-09-06 | 维沃移动通信有限公司 | A kind of detection method and terminal of earphone socket |
| CN111295871A (en) * | 2017-11-13 | 2020-06-16 | 三星电子株式会社 | Apparatus and method for controlling microphone according to connection of external accessory |
| WO2020134812A1 (en) * | 2018-12-25 | 2020-07-02 | 维沃移动通信有限公司 | Terminal device, adapter, and charging method |
| CN111586549A (en) * | 2020-05-14 | 2020-08-25 | 西安闻泰电子科技有限公司 | Earphone insertion detection circuit |
| CN112468923A (en) * | 2020-11-30 | 2021-03-09 | 维沃移动通信有限公司 | Audio processing circuit, method and device, electronic equipment and readable storage medium |
| CN112653959A (en) * | 2019-10-11 | 2021-04-13 | Oppo广东移动通信有限公司 | Earphone box, earphone device and mobile terminal |
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