CN104811866A - Mobile terminal and control method thereof - Google Patents
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Abstract
The invention is adaptive to the field of communication electronic equipment and provides a mobile terminal and a control method thereof. The mobile terminal comprises a Micro USB interface module, an audio switch module, a control module, an audio transcoding device, an isolation switch module, a charging module and a battery. When an earphone is connected to the mobile terminal, the control module controls the audio switch module to switch on so as to allow the audio signal output terminal of the audio transcoding device to communicate with the audio input terminal of the earphone and drives the audio switch module to output charging switching-off signals; the isolation switch module disconnects the Micro USB interface module and the charging module according to the charging switching-off signals; since a charging channel independent to the audio switch module is arranged, the isolation switch module is arranged in the charging channel, the problem that in the prior art, audio signals are damaged due to influence on MIC signals of the earphone by the charging channel is solved.
Description
Technical field
The present invention relates to communication electronic device technical field, particularly relate to a kind of mobile terminal and control method thereof.
Background technology
Along with the fast development of smart mobile phone, people can not content just to realization functionally, also propose higher demand to the differentiation of product with to U.S. vision.Wherein mobile phone ultimate attainment ultra-thin is exactly a large demand of consumer, in order to achieve this end, the height assessing device will be removed in all its bearings when carrying out Cell Phone Design, such as 3.5mm earphone interface is exactly the key factor affecting mobile phone ultrathin design, in order to take into account function and the performance of earphone, earphone interface and USB socket is needed to adopt multiplexing design, for the USB socket of 5pin, wherein the MIC signal end of earphone can be selected to carry out multiplexing with ID pin or the pin that charges usually, but when adopting and ID pin carries out multiplexing, because mobile phone needs the equipment of support many, the ID that now just there will be headset detection and other equipment detects the problem clashed, when adopting MIC signal end to carry out multiplexing with charging pin, there will be the interference problem that MIC signal is subject to charging path, so need to isolate, in prior art, the isolation of MIC signal and charging path is realized by single-pole double-throw switch (SPDT), but due to the charging voltage of main flow mobile phone be in the market all the standard of 5v, just can not meet the demands for adopting the high-voltage charging of 9v, so carry out separately design with the charge requirement that meet product to charge path with regard to needing on mainboard, and adopt the impact that the MIC signal of earphone can be caused in this way to be subject to charging path, cause audio signal impaired.In sum, the problem that the MIC signal that there is earphone in prior art causes audio signal impaired due to the impact being subject to charging path.
Summary of the invention
The object of the present invention is to provide a kind of mobile terminal, be intended to solve the problem causing audio signal impaired due to the impact being subject to charging path for the MIC signal that there is earphone in prior art.
The present invention is achieved in that first aspect provides a kind of mobile terminal, comprising: Micro usb interface module, Audio conversion switch module, audio frequency transcoder, charging module and battery;
Described Micro usb interface module is for accessing earphone or external power source, when earphone accesses, described audio frequency transcoder passes through Micro usb interface module to described earphone output channels audio signal when described Audio conversion switch module conducting, when external power source accesses, described external power source by described charging module to described powered battery;
Described mobile terminal also comprises control module and isolating switch module, the input of described control module connects the input end of described Micro usb interface module, the output of described control module connects the control end of described Audio conversion switch module, the output of described Audio conversion switch module connects the charging control end of described isolating switch module, the input of described isolating switch module connects the charging end of described Micro usb interface module, the voltage output end of described isolating switch module connects the input of described charging module, Mike's audio signal output end of described isolating switch module connects the audio input end of described audio frequency transcoder,
When according to the level change of the input end of described Micro usb interface module, described control module judges that earphone accesses, described control module controls the conducting of described Audio conversion switch module, be communicated with the audio input end of described earphone to make the audio signal output end of described audio frequency transcoder, and drive described Audio conversion switch module to export charging cut-off signals, path described in the conducting of described isolating switch module between Micro usb interface module and described audio frequency transcoder, described audio frequency transcoder is exported to the Mike's audio signal inputted by described earphone, described isolating switch module cuts off the path between described MicroUSB interface module and described charging module according to described charging cut-off signals simultaneously,
When according to the level change of the input end of described Micro usb interface module, described control module judges that external power source accesses, described control module controls described Audio conversion switch module and turns off, to cut off the path between the audio signal output end of described audio frequency transcoder and the audio input end of described earphone, described control module drives described Audio conversion switch module to export charging Continuity signal simultaneously, the path of described isolating switch module according to the conducting of described charging Continuity signal between Micro usb interface module and described charging module, be that described battery charges to make described external power source by described charging module, described isolating switch module cuts off the path between described Micro usb interface module and described audio frequency transcoder simultaneously.
In conjunction with first aspect, in the first execution mode of first aspect, described isolating switch module comprises the first switching device, second switch device and divider resistance module;
The input of described first switching device and the input of described second switch device are connected together altogether, and form the input of described isolating switch module, the control end of described first switching device connects the first voltage output end of described divider resistance module, the control end of described second switch device connects the second voltage output end of described divider resistance module, the output of described first switching device is Mike's audio signal output end of described isolating switch module, the output of described second switch device is the voltage output end of described isolating switch module, the first input end of described divider resistance module is system voltage control end, second input of described divider resistance module is the charging control end of described isolating switch module,
When described earphone accesses described Micro usb interface module, bias voltage between the control end of described first switching device and input is greater than the pre-pinch-off voltage of described switching tube, conducting state is entered to make described first switching device, bias voltage between the control end of described second switch device and input is less than the pre-pinch-off voltage of described second switch device, enters off state to make described second switch device;
When described external power source accesses described Micro usb interface module, bias voltage between the control end of described second switch device and input is greater than the pre-pinch-off voltage of described switching tube, conducting state is entered to make described second switch device, bias voltage between the control end of described first switching device and input is less than the pre-pinch-off voltage of described first switching device, enters off state to make described first switching device.
In conjunction with the first execution mode of first aspect, in the second execution mode of first aspect, described first switching device and described second switch device are field effect transistor, triode or IGBT.
In conjunction with the second execution mode of first aspect, in the third execution mode of first aspect, described first switching device is N channel field-effect pipe, and the grid of described N channel field-effect pipe, drain electrode and source electrode are respectively the control end of described first switching device, input and output;
Described second switch device is P-channel field-effect transistor (PEFT) pipe, and the grid of described P-channel field-effect transistor (PEFT) pipe, source electrode and drain electrode are respectively the control end of described second switch device, input and output.
In conjunction with the third execution mode of first aspect, in the 4th kind of execution mode of first aspect, described mobile terminal also comprises the first anti-backflow diode and the second anti-backflow diode;
The negative electrode of described first anti-backflow diode is connected drain electrode and the source electrode of described first switching device with anode;
The negative electrode of described second anti-backflow diode is connected source electrode and the drain electrode of described second switch device with anode.
In conjunction with the first execution mode of first aspect, in the 5th kind of execution mode of first aspect, described divider resistance module comprises the first resistance, the second resistance, the 3rd resistance, the 4th resistance, the 5th resistance and triode;
The first end of described first resistance and the first end of described second resistance connect altogether and form the first input end of described divider resistance module, second end of described first resistance and the first end of described 3rd resistance connect altogether and form the first voltage output end of described divider resistance module, second end ground connection of described 3rd resistance, second end of described second resistance, the described first end of the 4th resistance and the collector electrode of described triode connect altogether and form the second voltage output end of described divider resistance module, described second end of the 4th resistance and the grounded emitter of described triode, the base stage of described triode connects the first end of described 5th resistance, second end of described 5th resistance is the second input of described divider resistance module.
Second aspect present invention proposes a kind of control method based on the mobile terminal described in above-mentioned first aspect and the first execution mode to the 5th kind of execution mode thereof, comprises the following steps:
A. according to the level change of the input end of described Micro usb interface module, described control module judges whether described Micro usb interface module occurs earphone access or external power source access, when judging earphone access, then performs step B and step C successively; When judging external power source access, then perform step D and step e successively;
B. described control module controls the conducting of described Audio conversion switch module, to make the audio signal output end of described audio frequency transcoder be communicated with the audio input end of described earphone, and drives described Audio conversion switch module to export charging cut-off signals;
C. the path described in the conducting of described isolating switch module between Micro usb interface module and described audio frequency transcoder, export to described audio frequency transcoder with the Mike's audio signal inputted by described earphone, cut off the path between described Micro usb interface module and described charging module according to described charging cut-off signals simultaneously;
D. described control module controls the shutoff of described Audio conversion switch module, to cut off the path between the audio signal output end of described audio frequency transcoder and the audio input end of described earphone, drives described Audio conversion switch module to export charging Continuity signal simultaneously;
E. the path of described isolating switch module according to the conducting of described charging Continuity signal between Micro usb interface module and described charging module, to make described external power source be that described battery charges by described charging module, cut off the path between described Micro usb interface module and described audio frequency transcoder simultaneously.
Mobile terminal provided by the invention and control method thereof, the charging end of MIC and the Micro of earphone usb interface module is carried out multiplexing, achieve the ultrathin design to mobile terminal, and in order to meet the high-voltage charging demand of mobile terminal further, independent setting is independent of the charge tunnel of diverter switch module, by arranging isolating switch module in charge tunnel, and make the MIC audio signal that earphone is transmitted to audio frequency transcoder by isolating switch module, earphone is made to receive channel audio signal by Audio conversion switch module, the output channel of MIC audio signal and channel audio signal is separated, improve the tonequality of earphone, simultaneously when earphone inserts, isolating switch module makes audio signal and charge tunnel disconnect, the MIC signal avoiding earphone is subject to the impact of charge tunnel, solve in prior art the problem that the MIC signal that there is earphone causes audio signal impaired due to the impact being subject to charging path.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of the mobile terminal that an embodiment of the present invention provides;
Fig. 2 is the isolating switch module physical circuit figure in the mobile terminal that provides of an embodiment of the present invention;
Fig. 3 is the control method flow chart of the mobile terminal structure that the another kind of embodiment of the present invention provides.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
In order to technical scheme of the present invention is described, be described below by specific embodiment.
Embodiments provide a kind of mobile terminal, as shown in Figure 1, comprising: Micro usb interface module 101, Audio conversion switch module 103, audio frequency transcoder 109, charging module 105 and battery 107.
Micro usb interface module 101 is for accessing earphone 106 or external power source 108, when earphone 106 accesses, audio frequency transcoder 109 passes through Micro usb interface module 101 to earphone 106 output channels audio signal when 103 conducting of Audio conversion switch module, when external power source 108 accesses, external power source 108 is powered to battery 107 by charging module 105.
Concrete, the charging end VBUS of Micro usb interface module 101 connects the input of isolating switch module 102, audio output DM with DP of Micro usb interface module 101 is connected output D+ and D-of Audio conversion switch module 103, and the input end ID of Micro usb interface module 101 connects the signal input part ID of Audio conversion switch module 103.
Mobile terminal also comprises control module 104 and isolating switch module 102, the input of control module 104 connects the input end of Micro usb interface module 101, the output of control module 104 connects the control end of Audio conversion switch module 103, the output of Audio conversion switch module 103 connects the charging control end of isolating switch module 102, the input of isolating switch module 102 connects the charging end of Micro usb interface module 101, the voltage output end of isolating switch module 102 connects the input of charging module 105, Mike's audio signal output end of isolating switch module 102 connects the audio input end of audio frequency transcoder 109.
When according to the level change of the input end of Micro usb interface module 101, control module 104 judges that earphone accesses, control module 104 controls Audio conversion switch module 103 conducting, be communicated with the audio input end of the audio signal output end with earphone that make audio frequency transcoder 109, and drive Audio conversion switch module 103 to export charging cut-off signals, path between isolating switch module 102 conducting Micro usb interface module 101 and audio frequency transcoder 109, audio frequency transcoder 109 is exported to the Mike's audio signal inputted by earphone, cut off the path between Micro usb interface module 101 and charging module 105 according to charging cut-off signals simultaneously.
When according to the level change of the input end of Micro usb interface module 101, control module 104 judges that external power source accesses, control module 104 controls Audio conversion switch module 103 and turns off, to cut off the path between the audio signal output end of audio frequency transcoder 109 and the audio input end of earphone, drive Audio conversion switch module 103 to export charging Continuity signal simultaneously, isolating switch module 102 is according to the path between charging Continuity signal conducting Micro usb interface module 101 and charging module 105, charged for battery 107 by charging module 105 to make external power source, cut off the path between Micro usb interface module 101 and audio frequency transcoder 109 simultaneously.
The charging end of MIC and the Micro of earphone usb interface module 101 is carried out multiplexing by the embodiment of the present invention, achieve the ultrathin design to mobile terminal, and in order to meet the high-voltage charging demand of mobile terminal further, independent setting is independent of the charge tunnel of diverter switch module, by arranging isolating switch module in charge tunnel, and make the MIC audio signal that earphone is transmitted to audio frequency transcoder by isolating switch module, earphone is made 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, simultaneously when earphone inserts, isolating switch module makes audio signal and charge tunnel disconnect, the MIC signal avoiding earphone is subject to the impact of charge tunnel, solve in prior art the problem that the MIC signal that there is earphone causes audio signal impaired due to the impact being subject to charging path.
Further, as shown in Figure 2, isolating switch module 102 comprises the first switching device 1021, second switch device 1022 and divider resistance module 1023.
The input of the first switching device 1021 and the input of second switch device 1022 are connected together altogether, and form the input of isolating switch module 102, the control end of the first switching device 1021 connects the first voltage output end of divider resistance module 1023, the control end of second switch device 1022 connects the second voltage output end of divider resistance module 1023, the output of the first switching device 1021 is Mike's audio signal output end of isolating switch module 102, the output of second switch device 1022 is the voltage output end of isolating switch module 102, the first input end of divider resistance module 1023 is system voltage control end, second input of divider resistance module 1023 is the charging control end of isolating switch module 102.
When earphone access Micro usb interface module 101, bias voltage between the control end of the first switching device 1021 and input is greater than the pre-pinch-off voltage of switching tube, conducting state is entered to make the first switching device 1021, bias voltage between the control end of second switch device 1022 and input is less than the pre-pinch-off voltage of second switch device 1022, enters off state to make second switch device 1022.
When external power source access Micro usb interface module 101, bias voltage between the control end of second switch device 1022 and input is greater than the pre-pinch-off voltage of switching tube, conducting state is entered to make second switch device 1022, bias voltage between the control end of the first switching device 1021 and input is less than the pre-pinch-off voltage of the first switching device 1021, enters off state to make the first switching device 1021.
Further, the first switching device 1021 and second switch device 1022 are field effect transistor, triode or IGBT.
Preferably, the first switching device 1021 is N channel field-effect pipe, and the grid of N channel field-effect pipe, drain electrode and source electrode are respectively the control end of the first switching device 1021, input and output.
Second switch device 1022 is P-channel field-effect transistor (PEFT) pipe, and the grid of P-channel field-effect transistor (PEFT) pipe, source electrode and drain electrode are respectively the control end of second switch device 1022, input and output.
Further, mobile terminal also comprises the first anti-backflow diode D1 and the second anti-backflow diode D2, and wherein, the negative electrode of the first anti-backflow diode D1 is connected drain electrode and the source electrode of the first switching device 1021 with anode; The negative electrode of the second anti-backflow diode D2 is connected source electrode and the drain electrode of second switch device 1022 with anode.
Further, divider resistance module 1023 comprises the first resistance R1, the second resistance R2, the 3rd resistance R3 and the 4th resistance R4, the 5th resistance R5 and triode Q3.
The first end of the first resistance R1 and the first end of the second resistance R2 connect altogether and form the first input end of divider resistance module 1023, second end of the first resistance R1 and the first end of the 3rd resistance R3 connect altogether and form the first voltage output end of divider resistance module 1023, the second end ground connection of the 3rd resistance R3, second end of the second resistance R2, the first end of the 4th resistance R4 and the collector electrode of triode Q3 connect altogether and form the second voltage output end of divider resistance module 1023, the second end ground connection of the 4th resistance R4 and the grounded emitter of triode Q3, the base stage of triode Q3 connects the first end of the 5th resistance R5, second end of the 5th resistance R5 is the second input of divider resistance module 1023.
Below with the first switching device for N channel field-effect pipe, second switch device is P-channel field-effect transistor (PEFT) pipe, is specifically described the isolating switch module 102 in the embodiment of the present invention:
The pre-pinch-off voltage of P-channel field-effect transistor (PEFT) pipe V1 is-1v ~-2.5v, N channel field-effect pipe V2 and P-channel field-effect transistor (PEFT) pipe V1 forms anti-phase control switch, the charging end VBUS end of Micro usb interface module 101 is multiplexing ports that MIC signal and external power source charge, MIC signalman voltage range 0 ~ 1.2v for referencial use, charging input power is generally 5v.
Second resistance R2 and the 4th resistance R4 forms the divider resistance of P-channel field-effect transistor (PEFT) pipe V1, to be precision be respectively 5% divider resistance, what the selection of the second resistance R2 and the 4th resistance R4 resistance met varying input signal automatically shuts down conducting demand, if dividing potential drop is too little, the grounded-grid of such as P-channel field-effect transistor (PEFT) pipe V1 can cause P-channel field-effect transistor (PEFT) pipe that MIC signal can not be made to turn off completely; If dividing potential drop is too large, be directly such as 4.35v, now charge path can not conducting completely, can there is efficiency.Second resistance R2 and the 4th resistance R4 resistance can not be too little simultaneously, otherwise there will be the excessive situation of electric leakage, and in the design, the resistance of the second resistance R2 is 47K, the resistance of the 4th resistance R4 is 24K, therefore, maximum leakage current is 4.35v/71k=61uA, negligible.
In like manner, the first resistance R1 and the 3rd resistance R3 forms the divider resistance of N channel field-effect pipe V2, and in the design, the resistance of the first resistance R1 is 47K, and the resistance of the 3rd resistance R3 is 24K.
Wherein, VSYS is system voltage, and operating voltage range is 3.5 ~ 4.35v, and ceiling voltage is relevant with the battery battery core of mobile terminal.
When accessing external power source, external power source input voltage is 5v, and system power supply power supply acquiescence when charging exports as 3.5v, even if battery is crossed when putting, this circuit still can normally work, and the grid voltage of now corresponding P-channel field-effect transistor (PEFT) pipe V1 is:
Vg＝24*VSYS/(24+47)；
The grid voltage that can draw corresponding P-channel field-effect transistor (PEFT) pipe V1 is thus 0 ~ 1.47v, and Vd voltage is 5v, thus the bias voltage that Vdg voltage is 3.53 ~ 4v can be calculated, according to the pre-pinch-off voltage reference value of PMOS, now PMOS is in complete conducting state, thus realizes the conducting state of charging path; And now because N channel field-effect pipe V2 and P-channel field-effect transistor (PEFT) pipe V1 forms inverted logic, N channel field-effect pipe V2 now closes, therefore MIC audio signal transmission pathway closure.
Further, due to the technological problems of P-channel field-effect transistor (PEFT) pipe V1 and N channel field-effect pipe V2, there is the first anti-backflow diode D1 and the second anti-backflow diode D2 respectively, now in off position under, the direction of the second anti-backflow diode D2 should be noted that charging signals does not pass to MIC audio signal transmission path by the second anti-backflow diode D2 and gets on, so must prevent charging signals from passing through.
When earphone accesses, the input voltage range of the MIC signal in earphone is 0 ~ 1.2v, now mobile terminal is in running order, the grid voltage of therefore corresponding P-channel field-effect transistor (PEFT) pipe V1 is between 1.2 ~ 1.47, and the ceiling voltage of MIC signal is 1.2v, now corresponding Vdg voltage is the bias voltage of 0 ~ 0.2v, according to the pre-pinch-off voltage reference value of P-channel field-effect transistor (PEFT) pipe V1, now P-channel field-effect transistor (PEFT) pipe V1 has been in cut-off state, thus realize the closed condition of charging path, now because N channel field-effect pipe V2 and P-channel field-effect transistor (PEFT) pipe V1 forms inverted logic, N channel field-effect pipe V2 now opens, therefore MIC audio signal transmission channel conductive.
During owing to adopting different USB line, its line loss is different, therefore when voltage inputs likely lower than 5v, input voltage is made to only have 4.5v, and now still meet USB charge protocol, but there is no complete conducting due to P-channel field-effect transistor (PEFT) pipe, charge efficiency now will be made lower.In order to ensure the conducting adequacy of different metal-oxide-semiconductor, a triode control switch is increased in isolating switch module, the base stage of triode is connected with the GPIO interface of Audio conversion switch module, when external power source accesses, control the GPIO mouth for acquiescence pull-up of base stage input, during such charging, the grounded-grid of P-channel field-effect transistor (PEFT) pipe makes the conducting of P-channel field-effect transistor (PEFT) pipe more abundant, thus improves charge efficiency.When earphone inserts, due to the default channel of earphone channel selecting diverter switch, now can be exported as low level by the GPIO mouth of the insertion control Audio conversion switch module of earphone, therefore P-channel field-effect transistor (PEFT) pipe still can be kept to be in buttoned-up status for MIC path.
On the basis of embodiment of the present invention divider resistance in division module, add and export by Audio conversion switch module conducting or the closedown that control signal controls P-channel field-effect transistor (PEFT) pipe, avoid P-channel field-effect transistor (PEFT) pipe when there is USB line loss problem and fail the low problem of charge efficiency that conducting brings.
The embodiment of the present invention also provides a kind of control method of mobile terminal, as shown in Figure 3, comprises the following steps:
Step S201. control module judges earphone access or external power source access according to the level change of the input end of Micro usb interface module, when judging earphone access, then performs step S202 and step S203 successively; When judging external power source access, then perform step S204 and step S205.
Step S202. control module controls the conducting of Audio conversion switch module, is communicated with the audio input end of the audio signal output end with earphone that make audio frequency transcoder, and drives Audio conversion switch module to export charging cut-off signals.
Path between step S203. isolating switch module conducting Micro usb interface module and audio frequency transcoder, export to audio frequency transcoder with the Mike's audio signal inputted by earphone, cut off the path between Micro usb interface module and charging module according to charging cut-off signals simultaneously.
Step S204. control module controls Audio conversion switch module and turns off, and to cut off the path between the audio signal output end of audio frequency transcoder and the audio input end of earphone, drives Audio conversion switch module to export charging Continuity signal simultaneously.
Step S205. isolating switch module is according to the path between charging Continuity signal conducting Micro usb interface module and charging module, to make external power source by charging module for battery charges, cut off the path between Micro usb interface module and audio frequency transcoder simultaneously.
Further, isolating switch module comprises the first switching device, second switch device and divider resistance module;
The input of the first switching device and the input of second switch device are connected together altogether, and form the input of isolating switch module, the control end of the first switching device connects the first output of divider resistance module, the control end of second switch device connects the second output of divider resistance module, the output of the first switching device is Mike's audio signal output end of isolating switch module, the output of second switch device is the voltage output end of isolating switch module, the first input end of divider resistance module is system voltage control end, second input of divider resistance module is the charging control end of isolating switch module,
Step S203 is specially: the bias voltage between the control end of the first switching device and input is greater than the pre-pinch-off voltage of switching tube, conducting state is entered to make the first switching device, bias voltage between the control end of second switch device and input is less than the pre-pinch-off voltage of second switch device, enters off state to make second switch device.
Step S205 is specially: the bias voltage between the control end of second switch device and input is greater than the pre-pinch-off voltage of switching tube, conducting state is entered to make second switch device, bias voltage between the control end of the first switching device and input is less than the pre-pinch-off voltage of the first switching device, enters off state to make the first switching device.
Those of ordinary skill in the art can recognize, in conjunction with unit and the algorithm steps of each example of embodiment disclosed herein description, can realize with the combination of electronic hardware or computer software and electronic hardware.These functions perform with hardware or software mode actually, depend on application-specific and the design constraint of technical scheme.Professional and technical personnel can use distinct methods to realize described function to each specifically should being used for, but this realization should not thought and exceeds scope of the present invention.
Those skilled in the art can be well understood to, and for convenience and simplicity of description, the specific works process of the system of foregoing description, device and unit, with reference to the corresponding process in preceding method embodiment, can not repeat them here.
In several embodiments that the application provides, should be understood that disclosed system, apparatus and method can realize by another way.Such as, device embodiment described above is only schematic, such as, the division of described unit, be only a kind of logic function to divide, actual can have other dividing mode when realizing, such as multiple unit or assembly can in conjunction with or another system can be integrated into, or some features can be ignored, or do not perform.Another point, shown or discussed coupling each other or direct-coupling or communication connection can be by some interfaces, and the indirect coupling of device or unit or communication connection can be electrical, machinery or other form.
The described unit illustrated as separating component or can may not be and physically separates, and the parts as unit display can be or may not be physical location, namely can be positioned at a place, or also can be distributed in multiple network element.Some or all of unit wherein can be selected according to the actual needs to realize the object of the present embodiment scheme.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, also can be that the independent physics of unit exists, also can two or more unit in a unit integrated.
If described function using the form of SFU software functional unit realize and as independently production marketing or use time, can be stored in a computer read/write memory medium.Based on such understanding, the part of the part that technical scheme of the present invention contributes to prior art in essence in other words or this technical scheme can embody with the form of software product, this computer software product is stored in a storage medium, comprising some instructions in order to make a computer equipment (can be personal computer, server, or the network equipment etc.) perform all or part of step of method described in each embodiment of the present invention.And aforesaid storage medium comprises: USB flash disk, portable hard drive, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disc or CD etc. various can be program code stored medium.
Above content is in conjunction with concrete preferred implementation further description made for the present invention, can not assert that specific embodiment of the invention is confined to these explanations.For general technical staff of the technical field of the invention; make some equivalent alternative or obvious modification without departing from the inventive concept of the premise; and performance or purposes identical, all should be considered as belonging to the scope of patent protection that the present invention is determined by submitted to claims.
Claims (7)
1. a mobile terminal, it comprises Micro usb interface module, Audio conversion switch module, audio frequency transcoder, charging module and battery; Described Micro usb interface module is for accessing earphone or external power source, when earphone accesses, described audio frequency transcoder when described Audio conversion switch module conducting by described Micro usb interface module to described earphone output channels audio signal, when external power source accesses, described external power source by described charging module to described powered battery; It is characterized in that:
Described mobile terminal also comprises control module and isolating switch module, the input of described control module connects the input end of described Micro usb interface module, the output of described control module connects the control end of described Audio conversion switch module, the output of described Audio conversion switch module connects the charging control end of described isolating switch module, the input of described isolating switch module connects the charging end of described Micro usb interface module, the voltage output end of described isolating switch module connects the input of described charging module, Mike's audio signal output end of described isolating switch module connects the audio input end of described audio frequency transcoder,
When according to the level change of the input end of described Micro usb interface module, described control module judges that earphone accesses, described control module controls the conducting of described Audio conversion switch module, be communicated with the audio input end of described earphone to make the audio signal output end of described audio frequency transcoder, and drive described Audio conversion switch module to export charging cut-off signals, path described in the conducting of described isolating switch module between Micro usb interface module and described audio frequency transcoder, described audio frequency transcoder is exported to the Mike's audio signal inputted by described earphone, described isolating switch module cuts off the path between described MicroUSB interface module and described charging module according to described charging cut-off signals simultaneously,
When according to the level change of the input end of described Micro usb interface module, described control module judges that external power source accesses, described control module controls described Audio conversion switch module and turns off, to cut off the path between the audio signal output end of described audio frequency transcoder and the audio input end of described earphone; Described control module drives described Audio conversion switch module to export charging Continuity signal simultaneously, the path of described isolating switch module according to the conducting of described charging Continuity signal between Micro usb interface module and described charging module, to make described external power source be that described battery charges by described charging module, described isolating switch module cuts off the path between described Micro usb interface module and described audio frequency transcoder simultaneously.
2. mobile terminal as claimed in claim 1, it is characterized in that, described isolating switch module comprises the first switching device, second switch device and divider resistance module;
The input of described first switching device and the input of described second switch device are connected together altogether, and form the input of described isolating switch module, the control end of described first switching device connects the first voltage output end of described divider resistance module, the control end of described second switch device connects the second voltage output end of described divider resistance module, the output of described first switching device is Mike's audio signal output end of described isolating switch module, the output of described second switch device is the voltage output end of described isolating switch module, the first input end of described divider resistance module is system voltage control end, second input of described divider resistance module is the charging control end of described isolating switch module,
When described earphone accesses described Micro usb interface module, bias voltage between the control end of described first switching device and input is greater than the pre-pinch-off voltage of described switching tube, conducting state is entered to make described first switching device, bias voltage between the control end of described second switch device and input is less than the pre-pinch-off voltage of described second switch device, enters off state to make described second switch device;
When described external power source accesses described Micro usb interface module, bias voltage between the control end of described second switch device and input is greater than the pre-pinch-off voltage of described switching tube, conducting state is entered to make described second switch device, bias voltage between the control end of described first switching device and input is less than the pre-pinch-off voltage of described first switching device, enters off state to make described first switching device.
3. mobile terminal as claimed in claim 2, it is characterized in that, described first switching device and described second switch device are field effect transistor, triode or IGBT.
4. mobile terminal as claimed in claim 3, it is characterized in that, described first switching device is N channel field-effect pipe, and the grid of described N channel field-effect pipe, drain electrode and source electrode are respectively the control end of described first switching device, input and output;
Described second switch device is P-channel field-effect transistor (PEFT) pipe, and the grid of described P-channel field-effect transistor (PEFT) pipe, source electrode and drain electrode are respectively the control end of described second switch device, input and output.
5. mobile terminal as claimed in claim 4, it is characterized in that, described mobile terminal also comprises the first anti-backflow diode and the second anti-backflow diode;
The negative electrode of described first anti-backflow diode is connected drain electrode and the source electrode of described first switching device with anode;
The negative electrode of described second anti-backflow diode is connected source electrode and the drain electrode of described second switch device with anode.
6. mobile terminal as claimed in claim 2, it is characterized in that, described divider resistance module comprises the first resistance, the second resistance, the 3rd resistance, the 4th resistance, the 5th resistance and triode;
The first end of described first resistance and the first end of described second resistance connect altogether and form the first input end of described divider resistance module, second end of described first resistance and the first end of described 3rd resistance connect altogether and form the first voltage output end of described divider resistance module, second end ground connection of described 3rd resistance, second end of described second resistance, the described first end of the 4th resistance and the collector electrode of described triode connect altogether and form the second voltage output end of described divider resistance module, described second end of the 4th resistance and the grounded emitter of described triode, the base stage of described triode connects the first end of described 5th resistance, second end of described 5th resistance is the second input of described divider resistance module.
7. based on a control method for the mobile terminal as described in claim 1 to 6 any one, it is characterized in that, comprise the following steps:
A. according to the level change of the input end of described Micro usb interface module, described control module judges whether described Micro usb interface module occurs earphone access or external power source access, when judging earphone access, then performs step B and step C successively; When judging external power source access, then perform step D and step e successively;
B. described control module controls the conducting of described Audio conversion switch module, to make the audio signal output end of described audio frequency transcoder be communicated with the audio input end of described earphone, and drives described Audio conversion switch module to export charging cut-off signals;
C. the path described in the conducting of described isolating switch module between Micro usb interface module and described audio frequency transcoder, export to described audio frequency transcoder with the Mike's audio signal inputted by described earphone, cut off the path between described Micro usb interface module and described charging module according to described charging cut-off signals simultaneously;
D. described control module controls the shutoff of described Audio conversion switch module, to cut off the path between the audio signal output end of described audio frequency transcoder and the audio input end of described earphone, drives described Audio conversion switch module to export charging Continuity signal simultaneously;
E. the path of described isolating switch module according to the conducting of described charging Continuity signal between Micro usb interface module and described charging module, to make described external power source be that described battery charges by described charging module, cut off the path between described Micro usb interface module and described audio frequency transcoder simultaneously.
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| CN110620967A (en) * | 2018-06-20 | 2019-12-27 | 深圳市时商创展科技有限公司 | Earphone and earphone device |
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| CN104811866B (en) | 2017-11-14 |
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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. |
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