CN104811866B - A kind of mobile terminal and its control method - Google Patents
A kind of mobile terminal and its control method Download PDFInfo
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- CN104811866B CN104811866B CN201510208696.1A CN201510208696A CN104811866B CN 104811866 B CN104811866 B CN 104811866B CN 201510208696 A CN201510208696 A CN 201510208696A CN 104811866 B CN104811866 B CN 104811866B
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Abstract
The present invention is applied to communication electronic device technical field, and the present invention, which provides a kind of mobile terminal and its control method, mobile terminal, to be included：Micro usb interface modules, Audio conversion switch module, control module, audio transcoder, disconnecting switch module, charging module and battery；When earphone accesses, control module control Audio conversion switch module conducting, so that the audio signal output end of audio transcoder connects with the audio input end of earphone, and drive Audio conversion switch module output charging cut-off signals, disconnecting switch module is according to the path between the charging cut-off signals cut-out Micro usb interface modules and charging module, by setting the charge tunnel independently of switching switch module, by in charge tunnel by setting disconnecting switch module, the MIC signals for solving the problems, such as to have earphone in the prior art by the influence of charging path due to being caused audio signal impaired.
Description
Technical field
The present invention relates to communication electronic device technical field, more particularly to a kind of mobile terminal and its control method.
Background technology
With the fast development of smart mobile phone, people can not content just to realization functionally, also to product
Differentiation and extremely U.S. vision propose higher demand.Wherein mobile phone it is ultimate attainment it is ultra-thin be exactly consumer a big demand, in order to
This purpose is realized, will go to assess the height of device, such as 3.5mm earphone interfaces in all its bearings when carrying out Cell Phone Design
Exactly influence a key factor of mobile phone ultrathin design, in order to take into account the function of earphone and performance, it is necessary to by earphone interface with
USB socket is using the design method of multiplexing, and for 5pin USB socket, the MIC signal ends of wherein earphone would generally select and ID
Pin or charging pin are multiplexed, but when using being multiplexed with ID pin, because the equipment that mobile phone needs are supported is relatively more,
The problem of ID detections of headset detection and other equipment clash now just occurs；When using MIC signal ends and charging pin
When being multiplexed, it may appear that MIC signals by charging path interference problem, so needing to be isolated, MIC in the prior art
Signal with isolating for charging path is realized by single-pole double-throw switch (SPDT), yet with the charging of main flow mobile phone in the market
Voltage is all 5v standard, for that cannot meet to require using 9v high-voltage charging, so just needing on mainboard to charging
Path progress is individually designed to meet the charge requirement of product, and the MIC signals of earphone can be caused to be filled in this way
The influence of electric pathway, causes audio signal to be damaged.In summary, the MIC signals of earphone in the prior art be present due to being filled
The problem of influence of electric pathway causes audio signal to be damaged.
The content of the invention
It is an object of the invention to provide a kind of mobile terminal, it is intended to solves for the MIC of earphone in the prior art be present
Signal is due to the problem of being influenceed to cause audio signal to be damaged by charging path.
The present invention is achieved in that first aspect provides a kind of mobile terminal, including：Micro usb interface modules, sound
Frequency switching switch module, audio transcoder, charging module and battery；
The Micro usb interface modules are used to access earphone or external power source, when earphone accesses, the audio transcoding
Device is believed when the Audio conversion switch module turns on by Micro usb interface modules to the earphone output channels audio
Number, when external power source accesses, the external power source is by the charging module to the battery powered；
The mobile terminal also includes control module and disconnecting switch module, the input connection institute of the control module
The signal detection end of Micro usb interface modules is stated, the output end of the control module connects the Audio conversion switch module
Control terminal, the output end of the Audio conversion switch module connects the charge control end of the disconnecting switch module, it is described every
Input from switch module connects the charging end of the Micro usb interface modules, and the voltage of the disconnecting switch module is defeated
Go out the input that end connects the charging module, Mike's audio signal output end of the disconnecting switch module connects the audio
The audio input end of transcoder；
When the control module judges earphone according to the level change at the signal detection end of the Micro usb interface modules
During access, the control module controls the Audio conversion switch module conducting, so that the audio signal of the audio transcoder
Output end connects with the audio input end of the earphone, and drives the Audio conversion switch module output charging cut-off signals,
The disconnecting switch module turns on the path between the Micro usb interface modules and the audio transcoder, by described in
Mike's audio signal of earphone input exports closes according to the charging simultaneously to the audio transcoder, the disconnecting switch module
Break signal cuts off the path between the Micro usb interface modules and the charging module；
When the control module judges outside according to the level change at the signal detection end of the Micro usb interface modules
During plant-grid connection, the control module controls the Audio conversion switch module shut-off, to cut off the sound of the audio transcoder
Path between the audio input end of frequency signal output part and the earphone, the control module drive the Audio conversion simultaneously
Switch module output charging Continuity signal, the disconnecting switch module turn on the Micro according to the charging Continuity signal
Path between usb interface module and the charging module, so that the external power source is the electricity by the charging module
Pond is charged, and the disconnecting switch module is cut off between the Micro usb interface modules and the audio transcoder simultaneously
Path.
With reference in a first aspect, in the first embodiment of first aspect, the disconnecting switch module is opened including first
Close device, second switch device and divider resistance module；
The input of the input of the first switch device and the second switch device is connected together altogether, and forms institute
The input of disconnecting switch module is stated, the control terminal of the first switch device connects the first voltage of the divider resistance module
Output end, the second voltage output end of the control terminal connection divider resistance module of the second switch device, described first
The output end of switching device be the disconnecting switch module Mike's audio signal output end, the output of the second switch device
Hold and controlled for the voltage output end of the disconnecting switch module, the first input end of the divider resistance module for system voltage
End, the second input of the divider resistance module are the charge control end of the disconnecting switch module；
When the earphone accesses the Micro usb interface modules, the control terminal of the first switch device and input
Bias voltage between end is more than the pre- pinch-off voltage of the switching tube, so that the first switch device enters conducting state,
Bias voltage between the control terminal and input of the second switch device is less than the pre- pinch off electricity of the second switch device
Pressure, so that the second switch device enters off state；
When the external power source access the Micro usb interface modules when, the control terminal of the second switch device with
Bias voltage between input is more than the pre- pinch-off voltage of the switching tube, so that the second switch device enters conducting shape
State, the bias voltage between the control terminal and input of the first switch device are less than the pre- pinch off of the first switch device
Voltage, so that the first switch device enters off state.
With reference to the first embodiment of first aspect, in second of embodiment of first aspect, described first opens
It is FET, triode or IGBT to close device and the second switch device.
With reference to second of embodiment of first aspect, in the third embodiment of first aspect, described first opens
Pass device is N-channel FET, and grid, drain electrode and the source electrode of the N-channel FET are respectively the first switch
Control terminal, input and the output end of device；
The second switch device is P-channel field-effect transistor (PEFT) pipe, grid, source electrode and the drain electrode of the P-channel field-effect transistor (PEFT) pipe
Control terminal, input and the output end of respectively described second switch device.
It is described mobile whole in the 4th kind of embodiment of first aspect with reference to the third embodiment of first aspect
End also includes the first anti-backflow diode and the second anti-backflow diode；
The negative electrode of the first anti-backflow diode connects drain electrode and the source electrode of the first switch device with anode；
The negative electrode of the second anti-backflow diode connects source electrode and the drain electrode of the second switch device with anode.
With reference to the first embodiment of first aspect, in the 5th kind of embodiment of first aspect, the partial pressure electricity
Resistance module includes first resistor, second resistance, 3rd resistor, the 4th resistance, the 5th resistance and triode；
The first end of the first end of the first resistor and the second resistance connects and forms the divider resistance module altogether
First input end, the second end of the first resistor and the first end of the 3rd resistor connect and form the divider resistance altogether
The first voltage output end of module, the second end ground connection of the 3rd resistor, the second end of the second resistance, the 4th electricity
The colelctor electrode of the first end of resistance and the triode connects and forms the second voltage output end of the divider resistance module, institute altogether
The second end of the 4th resistance and the grounded emitter of the triode are stated, the base stage of the triode connects the 5th resistance
First end, the second end of the 5th resistance are the second input of the divider resistance module.
Second aspect of the present invention proposes a kind of above-mentioned first aspect and its first embodiment of being based on to the 5th kind of implementation
The control method of mobile terminal described in mode, comprises the following steps：
A. the control module is according to judging the level change at the signal detection end of the Micro usb interface modules
Whether Micro usb interface modules there is earphone access or external power source access, when judging earphone access, then perform step successively
Rapid B and step C；When judging external power source access, then step D and step E is performed successively；
B. the control module controls the Audio conversion switch module conducting, so that the audio letter of the audio transcoder
Number output end connects with the audio input end of the earphone, and drives the Audio conversion switch module output charging shut-off letter
Number；
C. the disconnecting switch module turns on logical between the Micro usb interface modules and the audio transcoder
Road, Mike's audio signal of the earphone input is exported to the audio transcoder, while according to the charging shut-off letter
Number cut off the path between the Micro usb interface modules and the charging module；
D. the control module controls the Audio conversion switch module shut-off, to cut off the audio of the audio transcoder
Path between the audio input end of signal output part and the earphone, while drive the Audio conversion switch module output to fill
Conductance messenger；
E. the disconnecting switch module according to the charging Continuity signal turn on the Micro usb interface modules with it is described
Path between charging module, so that the external power source is that the battery is charged by the charging module, cut simultaneously
Disconnected path between the Micro usb interface modules and the audio transcoder.
Mobile terminal provided by the invention and its control method, by the charging of the MIC of earphone and Micro usb interface modules
End is multiplexed, and realizes the ultrathin design to mobile terminal, and in order to further meet the high-voltage charging need of mobile terminal
Ask, be separately provided the charge tunnel independently of switching switch module, by setting disconnecting switch module in charge tunnel, and make
The MIC audio signals that earphone is transmitted by disconnecting switch module to audio transcoder, make earphone pass through Audio conversion switch module
Channel audio signal is received, the output channel of MIC audio signals and channel audio signal is separated, improves the sound of earphone
Matter, while when earphone inserts, disconnecting switch module makes audio signal be disconnected with charge tunnel, avoids the MIC signals of earphone
Influenceed by charge tunnel, solve the MIC signals that earphone in the prior art be present because the influence by charging path is led
The problem of causing audio signal impaired.
Brief description of the drawings
Technical scheme in order to illustrate the embodiments of the present invention more clearly, below will be to embodiment or description of the prior art
In the required accompanying drawing used be briefly described, it should be apparent that, drawings in the following description be only the present invention some
Embodiment, for those of ordinary skill in the art, without having to pay creative labor, can also be according to these
Accompanying drawing obtains other accompanying drawings.
Fig. 1 is the structural representation for the mobile terminal that an embodiment of the present invention provides；
Fig. 2 is the disconnecting switch module physical circuit figure in the mobile terminal that an embodiment of the present invention provides；
Fig. 3 is the control method flow chart for the mobile terminal structure that another embodiment of the present invention provides.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
In order to illustrate technical scheme, illustrated below by specific embodiment.
The embodiments of the invention provide a kind of mobile terminal, as shown in figure 1, including：Micro usb interface modules 101, sound
Frequency switching switch module 103, audio transcoder 109, charging module 105 and battery 107.
Micro usb interface modules 101 are used to access earphone 106 or external power source 108, when earphone 106 accesses, audio
Transcoder 109 is when Audio conversion switch module 103 turns on by Micro usb interface modules 101 to the output channels of earphone 106
Audio signal, when external power source 108 accesses, external power source 108 is powered by charging module 105 to battery 107.
Specifically, the input of the charging end VBUS connection disconnecting switch module 102 of Micro usb interface modules 101,
The audio output DM of Micro usb interface modules 101 connects the output end D+ and D- of Audio conversion switch module 103 with DP,
The signal input part ID of the signal detection end ID connection Audio conversions switch module 103 of Micro usb interface modules 101.
Mobile terminal also includes control module 104 and disconnecting switch module 102, the input connection of control module 104
The signal detection end of Micro usb interface modules 101, the output end connection Audio conversion switch module 103 of control module 104
Control terminal, the charge control end of the output end connection disconnecting switch module 102 of Audio conversion switch module 103, disconnecting switch mould
The charging end of the input connection Micro usb interface modules 101 of block 102, the voltage output end connection of disconnecting switch module 102
The input of charging module 105, the sound of Mike's audio signal output end connection audio transcoder 109 of disconnecting switch module 102
Frequency input terminal.
When control module 104 judges that earphone connects according to the level change at the signal detection end of Micro usb interface modules 101
Fashionable, control module 104 controls Audio conversion switch module 103 to turn on, so that the audio signal output end of audio transcoder 109
Connected with the audio input end of earphone, and drive the output charging cut-off signals of Audio conversion switch module 103, disconnecting switch module
Path between 102 conducting Micro usb interface modules 101 and audio transcoder 109, Mike's audio of earphone input is believed
Number export to audio transcoder 109, while according to charging cut-off signals cut-out Micro usb interface modules 101 and charging module
Path between 105.
When control module 104 judges external electrical according to the level change at the signal detection end of Micro usb interface modules 101
When source is accessed, control module 104 controls Audio conversion switch module 103 to turn off, to cut off the audio signal of audio transcoder 109
Path between output end and the audio input end of earphone, while drive the output charging conducting letter of Audio conversion switch module 103
Number, disconnecting switch module 102 is according between charging Continuity signal conducting Micro usb interface modules 101 and charging module 105
Path, so that external power source is that battery 107 is charged by charging module 105, while cut off Micro usb interface modules
Path between 101 and audio transcoder 109.
The charging end of the MIC of earphone and Micro usb interface modules 101 is multiplexed by the embodiment of the present invention, is realized
To the ultrathin design of mobile terminal, and in order to further meet the high-voltage charging demand of mobile terminal, be separately provided independently of
Switch the charge tunnel of switch module, by setting disconnecting switch module in charge tunnel, and earphone is passed through disconnecting switch
The MIC audio signals that module transmits to audio transcoder, earphone is set to receive channel audio signal by Audio conversion switch module,
The output channel of audio signal and channel audio signal is separated, improve the tonequality of earphone, while when earphone inserts, every
Audio signal is set to be disconnected with charge tunnel from switch module, avoid the MIC signals of earphone is influenceed by charge tunnel, solves
The MIC signals of earphone in the prior art be present due to the problem of being caused audio signal to be damaged by the influence of charging path.
Further, as shown in Fig. 2 disconnecting switch module 102 includes first switch device 1021, second switch device
1022 and divider resistance module 1023.
The input of first switch device 1021 and the input of second switch device 1022 are connected together altogether, and form every
From the input of switch module 102, the first voltage of the control terminal connection divider resistance module 1023 of first switch device 1021
Output end, the second voltage output end of the control terminal connection divider resistance module 1023 of second switch device 1022, first switch
The output end of device 1021 be disconnecting switch module 102 Mike's audio signal output end, the output of second switch device 1022
To hold as the voltage output end of disconnecting switch module 102, the first input end of divider resistance module 1023 is system voltage control terminal,
Second input of divider resistance module 1023 is the charge control end of disconnecting switch module 102.
When earphone accesses Micro usb interface modules 101, between the control terminal and input of first switch device 1021
Bias voltage be more than switching tube pre- pinch-off voltage so that first switch device 1021 enters conducting state, second switch device
Bias voltage between the control terminal and input of part 1022 is less than the pre- pinch-off voltage of second switch device 1022, so that second
Switching device 1022 enters off state.
When external power source accesses Micro usb interface modules 101, the control terminal and input of second switch device 1022
Between bias voltage be more than switching tube pre- pinch-off voltage so that second switch device 1022 enters conducting state, first opens
The pre- pinch-off voltage that the bias voltage between the control terminal of device 1021 and input is less than first switch device 1021 is closed, so that
First switch device 1021 enters off state.
Further, first switch device 1021 and second switch device 1022 are FET, triode or IGBT.
Preferably, first switch device 1021 is N-channel FET, grid, drain electrode and the source of N-channel FET
Pole is respectively control terminal, input and the output end of first switch device 1021.
Second switch device 1022 is P-channel field-effect transistor (PEFT) pipe, and grid, source electrode and the drain electrode of P-channel field-effect transistor (PEFT) pipe are distinguished
For the control terminal of second switch device 1022, input and output end.
Further, mobile terminal also includes the first anti-backflow diode D1 and the second anti-backflow diode D2, wherein, the
One anti-backflow diode D1 negative electrode connects drain electrode and the source electrode of first switch device 1021 with anode；Second anti-backflow diode
D2 negative electrode connects source electrode and the drain electrode of second switch device 1022 with anode.
Further, divider resistance module 1023 includes first resistor R1, second resistance R2,3rd resistor R3 and the 4th
Resistance R4, the 5th resistance R5 and triode Q3.
First resistor R1 first end and second resistance R2 first end connect and form the of divider resistance module 1023 altogether
One input, first resistor R1 the second end and 3rd resistor R3 first end connect and form the of divider resistance module 1023 altogether
One voltage output end, 3rd resistor R3 the second end ground connection, second resistance R2 the second end, the 4th resistance R4 first end and
Triode Q3 colelctor electrode connects and forms the second voltage output end of divider resistance module 1023, the 4th resistance R4 the second end altogether
Ground connection and triode Q3 grounded emitter, triode Q3 base stage connect the 5th resistance R5 first end, the 5th resistance R5's
Second end is the second input of divider resistance module 1023.
Below using first switch device as N-channel FET, second switch device is P-channel field-effect transistor (PEFT) pipe, to this hair
Disconnecting switch module 102 in bright embodiment is specifically described：
P-channel field-effect transistor (PEFT) pipe V1 pre- pinch-off voltage is -1v~-2.5v, N-channel FET V2 and P-channel field-effect transistor (PEFT)
Pipe V1 forms anti-phase controlling switch, and the charging end VBUS ends of Micro usb interface modules 101 are that MIC signals fill with external power source
The multiplexing port of electricity, MIC signals work 0~1.2v of reference voltage range, charging input power is usually 5v.
Second resistance R2 and the 4th resistance R4 forms P-channel field-effect transistor (PEFT) pipe V1 divider resistance, is that precision is 5% respectively
Divider resistance, what the selection of second resistance R2 and the 4th resistance R4 resistances met varying input signal automatically shuts down conducting demand,
If partial pressure is too small, for example P-channel field-effect transistor (PEFT) pipe V1 grounded-grid can cause P-channel field-effect transistor (PEFT) pipe that MIC signals can not be made complete
It is fully closed disconnected；If partial pressure is too big, for example is directly 4.35v, now charge path can not be fully on, can there is efficiency.
Second resistance R2 and the 4th resistance R4 resistances can not be too small simultaneously, otherwise occur excessive situation of leaking electricity, second in the design
Resistance R2 resistance is 47K, and the 4th resistance R4 resistance is 24K, and therefore, maximum leakage current is 4.35v/71k=61uA, can
To ignore.
Similarly, first resistor R1 and 3rd resistor R3 form N-channel FET V2 divider resistance, first in the design
Resistance R1 resistance is 47K, and 3rd resistor R3 resistance is 24K.
Wherein, VSYS is system voltage, and operating voltage range is 3.5~4.35v, ceiling voltage and mobile terminal battery
Battery core is relevant.
When accessing external power source, external power source input voltage is 5v, and system power supply power supply acquiescence output in charging is
3.5v, even if battery is crossed in the case of putting, the circuit still can be with normal work, now corresponding P-channel field-effect transistor (PEFT) pipe V1
Grid voltage is：
Vg=24*VSYS/ (24+47)；
It can thus be concluded that the grid voltage for going out corresponding P-channel field-effect transistor (PEFT) pipe V1 is 0~1.47v, and Vd voltages are 5v, so as to
To calculate bias voltage of the Vdg voltages as 3.53~4v, according to PMOS pre- pinch-off voltage reference value, now PMOS is to be in
Fully on state, so as to realize the conducting state of charging path；And now because N-channel FET V2 and P-channel field are imitated
Should pipe V1 form inverted logic, N-channel FET V2 now closed, therefore MIC audio signal transmissions passage is closed.
Further, due to P-channel field-effect transistor (PEFT) pipe V1 and N-channel FET V2 technological problemses, it is anti-to be respectively present first
Diode D1 and the second anti-backflow diode D2 is flow backwards, now in the closed state, should be noted that charging signals can not be by the
Two anti-backflow diode D2 pass to MIC audio signal transmissions path up, so the second anti-backflow diode D2 direction is certain
Prevent charging signals from passing through.
When earphone accesses, the input voltage range of the MIC signals in earphone is 0~1.2v, and now mobile terminal is in
Working condition, therefore between corresponding P-channel field-effect transistor (PEFT) pipe V1 grid voltage is 1.2~1.47, and the highest of MIC signals is electric
Press as 1.2v, now corresponding Vdg voltages are 0~0.2v bias voltage, according to P-channel field-effect transistor (PEFT) pipe V1 pre- pinch-off voltage
Reference value, now P-channel field-effect transistor (PEFT) pipe V1 is to be in cut-off state, so as to realize the closed mode of charging path, now
Because N-channel FET V2 and P-channel field-effect transistor (PEFT) pipe V1 forms inverted logic, N-channel FET V2 is now opened, therefore
MIC audio signal transmission channel conductives.
During due to using different USB lines, its line loss is different, therefore in control source possibly lower than 5v so that input
Voltage only has 4.5v, and now still meets USB charge protocols, but due to P-channel field-effect transistor (PEFT) pipe do not have it is fully on, now
It will make it that charge efficiency is relatively low.In order to ensure the conducting adequacy of different metal-oxide-semiconductors, increase by one three in disconnecting switch module
Pole pipe controlling switch, the base stage of triode is connected with the GPIO interface of Audio conversion switch module, when external power source accesses,
The GPIO mouths for acquiescence pull-up of base stage input are controlled, the grounded-grid of P-channel field-effect transistor (PEFT) pipe causes P-channel field when so charging
The conducting of effect pipe is more abundant, so as to improve charge efficiency.When earphone inserts, due to writing from memory for earphone channel selecting switching switch
Recognize passage, the GPIO mouths output that Audio conversion switch module can be now controlled by the insertion of earphone is low level, therefore right
It can still keep P-channel field-effect transistor (PEFT) pipe in the completely closed state in MIC paths.
The embodiment of the present invention on the basis of divider resistance, adds defeated by Audio conversion switch module in division module
Go out the on and off of control signal control P-channel field-effect transistor (PEFT) pipe, avoid P-channel field-effect transistor (PEFT) pipe when USB line damage be present
Fail the problem of next charge efficiency of conduction band is low.
The embodiment of the present invention also provides a kind of control method of mobile terminal, as shown in figure 3, comprising the following steps：
Step S201. control modules judge earphone according to the level change at the signal detection end of Micro usb interface modules
Access or external power source access, when judging earphone access, then step S202 and step S203 are performed successively；It is outside when judging
During plant-grid connection, then step S204 and step S205 is performed.
Step S202. control modules control Audio conversion switch module conducting, so that the audio signal of audio transcoder is defeated
Go out end to connect with the audio input end of earphone, and drive Audio conversion switch module output charging cut-off signals.
Step S203. disconnecting switch module turns on the path between Micro usb interface modules and audio transcoder, will
Mike's audio signal of earphone input, which exports, gives audio transcoder, while according to charging cut-off signals cut-out Micro USB interfaces
Path between module and charging module.
Step S204. control modules control Audio conversion switch module shut-off, to cut off the audio signal of audio transcoder
Path between output end and the audio input end of earphone, while drive Audio conversion switch module output charging Continuity signal.
Step S205. disconnecting switch module is according to charging Continuity signal conducting Micro usb interface modules and charging module
Between path so that external power source by charging module be battery charged, while cut off Micro usb interface modules with
Path between audio transcoder.
Further, disconnecting switch module includes first switch device, second switch device and divider resistance module；
The input of first switch device and the input of second switch device are connected together altogether, and form disconnecting switch mould
The input of block, the first output end of the control terminal connection divider resistance module of first switch device, the control of second switch device
Second output end of connection divider resistance module in end processed, the output end of first switch device are Mike's audio of disconnecting switch module
Signal output part, the output end of second switch device are the voltage output end of disconnecting switch module, the first of divider resistance module
Input is system voltage control terminal, and the second input of divider resistance module is the charge control end of disconnecting switch module；
Step S203 is specially：Bias voltage between the control terminal and input of first switch device is more than switching tube
Pre- pinch-off voltage, so that first switch device enters conducting state, it is inclined between the control terminal and input of second switch device
The pre- pinch-off voltage that voltage is less than second switch device is put, so that second switch device enters off state.
Step S205 is specially：Bias voltage between the control terminal and input of second switch device is more than switching tube
Pre- pinch-off voltage, so that second switch device enters conducting state, it is inclined between the control terminal and input of first switch device
The pre- pinch-off voltage that voltage is less than first switch device is put, so that first switch device enters off state.
Those of ordinary skill in the art are it is to be appreciated that the list of each example described with reference to the embodiments described herein
Member and algorithm steps, it can be realized with the combination of electronic hardware or computer software and electronic hardware.These functions are actually
Performed with hardware or software mode, application-specific and design constraint depending on technical scheme.Professional and technical personnel
Described function can be realized using distinct methods to each specific application, but this realization is it is not considered that exceed
The scope of the present invention.
It is apparent to those skilled in the art that for convenience and simplicity of description, the system of foregoing description,
The specific work process of device and unit, the corresponding process in preceding method embodiment is may be referred to, will not be repeated here.
In several embodiments provided herein, it should be understood that disclosed systems, devices and methods, can be with
Realize by another way.For example, device embodiment described above is only schematical, for example, the unit
Division, only a kind of division of logic function, can there is other dividing mode, such as multiple units or component when actually realizing
Another system can be combined or be desirably integrated into, or some features can be ignored, or do not perform.It is another, it is shown or
The mutual coupling discussed or direct-coupling or communication connection can be the indirect couplings by some interfaces, device or unit
Close or communicate to connect, can be electrical, mechanical or other forms.
The unit illustrated as separating component can be or may not be physically separate, show as unit
The part shown can be or may not be physical location, you can with positioned at a place, or can also be distributed to multiple
On NE.Some or all of unit therein can be selected to realize the mesh of this embodiment scheme according to the actual needs
's.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, can also
That unit is individually physically present, can also two or more units it is integrated in a unit.
If the function is realized in the form of SFU software functional unit and is used as independent production marketing or in use, can be with
It is stored in a computer read/write memory medium.Based on such understanding, technical scheme is substantially in other words
The part to be contributed to prior art or the part of the technical scheme can be embodied in the form of software product, the meter
Calculation machine software product is stored in a storage medium, including some instructions are causing a computer equipment (can be
People's computer, server, or network equipment etc.) perform all or part of step of each embodiment methods described of the present invention.
And foregoing storage medium includes：USB flash disk, mobile hard disk, read-only storage (ROM, Read-Only Memory), arbitrary access are deposited
Reservoir (RAM, Random Access Memory), magnetic disc or CD etc. are various can be with the medium of store program codes.
Above content is to combine specific preferred embodiment further description made for the present invention, it is impossible to is assert
The specific implementation of the present invention is confined to these explanations.For general technical staff of the technical field of the invention,
Some equivalent substitutes or obvious modification are made on the premise of not departing from present inventive concept, and performance or purposes are identical, all should
It is considered as belonging to the scope of patent protection that the present invention is determined by the claims submitted.
Claims (6)
1. a kind of mobile terminal, it includes Micro usb interface modules, Audio conversion switch module, audio transcoder, charging mould
Block and battery；The Micro usb interface modules are used to access earphone or external power source, when earphone accesses, the audio
Transcoder is when the Audio conversion switch module turns on by the Micro usb interface modules to the earphone output channels
Audio signal, when external power source accesses, the external power source is by the charging module to the battery powered；Its feature exists
In：
The mobile terminal also includes control module and disconnecting switch module, described in the input connection of the control module
The signal detection end of Micro usb interface modules, the output end of the control module connect the Audio conversion switch module
Control terminal, the output end of the Audio conversion switch module connect the charge control end of the disconnecting switch module, the isolation
The input of switch module connects the charging end of the Micro usb interface modules, the voltage output of the disconnecting switch module
End connects the input of the charging module, and Mike's audio signal output end of the disconnecting switch module connects the audio conversion
The audio input end of code device；
When the control module judges that earphone accesses according to the level change at the signal detection end of the Micro usb interface modules
When, the control module controls the Audio conversion switch module conducting, so that the audio signal output of the audio transcoder
End connects with the audio input end of the earphone, and drives the Audio conversion switch module output charging cut-off signals, described
Disconnecting switch module turns on the path between the Micro usb interface modules and the audio transcoder, by the earphone
Mike's audio signal of input is exported to the audio transcoder, and the disconnecting switch module is simultaneously according to the charging shut-off letter
Number cut off the path between the Micro usb interface modules and the charging module；
When the control module judges external power source according to the level change at the signal detection end of the Micro usb interface modules
During access, the control module controls the Audio conversion switch module shut-off, to cut off the audio of audio transcoder letter
Path number between output end and the audio input end of the earphone；The control module drives the Audio conversion to switch simultaneously
Module output charging Continuity signal, the disconnecting switch module turn on the Micro USB according to the charging Continuity signal and connect
Path between mouth mold block and the charging module, so that the external power source is carried out by the charging module for the battery
Charging, the disconnecting switch module cut off the path between the Micro usb interface modules and the audio transcoder simultaneously；
Wherein, the disconnecting switch module includes first switch device, second switch device and divider resistance module；
The input of the input of the first switch device and the second switch device is connected together altogether, and form it is described every
From the input of switch module, the control terminal of the first switch device connects the first voltage output of the divider resistance module
End, the control terminal of the second switch device connect the second voltage output end of the divider resistance module, the first switch
The output end of device is Mike's audio signal output end of the disconnecting switch module, and the output end of the second switch device is
The voltage output end of the disconnecting switch module, the first input end of the divider resistance module are system voltage control terminal, institute
The second input for stating divider resistance module is the charge control end of the disconnecting switch module；
When the earphone accesses the Micro usb interface modules, the control terminal of the first switch device and input it
Between bias voltage be more than the pre- pinch-off voltage of the switching tube it is described so that the first switch device enters conducting state
Bias voltage between the control terminal and input of second switch device is less than the pre- pinch-off voltage of the second switch device, with
The second switch device is set to enter off state；
When the external power source accesses the Micro usb interface modules, the control terminal of the second switch device and input
Bias voltage between end is more than the pre- pinch-off voltage of the switching tube, so that the second switch device enters conducting state,
Bias voltage between the control terminal and input of the first switch device is less than the pre- pinch off electricity of the first switch device
Pressure, so that the first switch device enters off state.
2. mobile terminal as claimed in claim 1, it is characterised in that the first switch device and the second switch device
For FET, triode or IGBT.
3. mobile terminal as claimed in claim 2, it is characterised in that the first switch device is N-channel FET, institute
Grid, drain electrode and the source electrode for stating N-channel FET are respectively the control terminal of the first switch device, input and defeated
Go out end；
The second switch device is P-channel field-effect transistor (PEFT) pipe, and grid, source electrode and the drain electrode of the P-channel field-effect transistor (PEFT) pipe are distinguished
For control terminal, input and the output end of the second switch device.
4. mobile terminal as claimed in claim 3, it is characterised in that the mobile terminal also includes the first anti-backflow diode
With the second anti-backflow diode；
The negative electrode of the first anti-backflow diode connects drain electrode and the source electrode of the first switch device with anode；
The negative electrode of the second anti-backflow diode connects source electrode and the drain electrode of the second switch device with anode.
5. mobile terminal as claimed in claim 1, it is characterised in that the divider resistance module includes first resistor, second
Resistance, 3rd resistor, the 4th resistance, the 5th resistance and triode；
The first end of the first end of the first resistor and the second resistance connects and forms the of the divider resistance module altogether
One input, the second end of the first resistor connect with the first end of the 3rd resistor and form the divider resistance module altogether
First voltage output end, the second end ground connection of the 3rd resistor, the second end of the second resistance, the 4th resistance
The colelctor electrode of first end and the triode connects and forms the second voltage output end of the divider resistance module altogether, and described
Second end of four resistance and the grounded emitter of the triode, the base stage of the triode connect the first of the 5th resistance
End, the second end of the 5th resistance are the second input of the divider resistance module.
A kind of 6. control method of the mobile terminal based on as described in claim 1 to 5 any one, it is characterised in that including
Following steps：
A. the control module is according to judging the level change at the signal detection end of the Micro usb interface modules
Whether Micro usb interface modules there is earphone access or external power source access, when judging earphone access, then perform step successively
Rapid B and step C；When judging external power source access, then step D and step E is performed successively；
B. the control module controls the Audio conversion switch module conducting, so that the audio signal of the audio transcoder is defeated
Go out end to connect with the audio input end of the earphone, and drive the Audio conversion switch module output charging cut-off signals；
C. the disconnecting switch module turns on the path between the Micro usb interface modules and the audio transcoder, with
Mike's audio signal of the earphone input is exported to the audio transcoder, while according to the charging cut-off signals cut-out
Path between the Micro usb interface modules and the charging module；
D. the control module controls the Audio conversion switch module shut-off, to cut off the audio signal of the audio transcoder
Path between the audio input end of output end and the earphone, while drive the Audio conversion switch module output charging to lead
Messenger；
E. the disconnecting switch module turns on the Micro usb interface modules and the charging according to the charging Continuity signal
Path between module, so that the external power source is that the battery is charged by the charging module, while cut off institute
State the path between Micro usb interface modules and the audio transcoder.
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| CN201510208696.1A CN104811866B (en) | 2015-04-28 | 2015-04-28 | A kind of mobile terminal and its control method |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105071795A (en) * | 2015-08-17 | 2015-11-18 | 广东欧珀移动通信有限公司 | Multiplex circuit based on USB interface |
| CN105868141B (en) * | 2016-04-18 | 2019-09-27 | 深圳市树源科技有限公司 | Digital interface adapter |
| CN108052467A (en) * | 2017-11-27 | 2018-05-18 | 努比亚技术有限公司 | A kind of interface self-adaption method, terminal and computer readable storage medium |
| CN110620967B (en) * | 2018-06-20 | 2021-05-04 | 深圳市时商创展科技有限公司 | Earphone and earphone device |
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| EP2597844A1 (en) * | 2010-07-23 | 2013-05-29 | Huizhou TCL Mobile Communication Co., Ltd. | Method and device for sharing micro-usb interface between earphone and usb |
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| WO2013097356A1 (en) * | 2011-12-26 | 2013-07-04 | 中兴通讯股份有限公司 | Hdmi multiplexing method, hdmi, and hdmi-equipped device |
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Address after: Changan town in Guangdong province Dongguan 523860 usha Beach Road No. 18 Patentee after: GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., Ltd. Address before: Changan town in Guangdong province Dongguan 523841 usha Beach Road No. 18 Patentee before: GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., Ltd. |