CN108521873A - The control device and wired earphone of earphone - Google Patents

The control device and wired earphone of earphone Download PDF

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Publication number
CN108521873A
CN108521873A CN201880000750.5A CN201880000750A CN108521873A CN 108521873 A CN108521873 A CN 108521873A CN 201880000750 A CN201880000750 A CN 201880000750A CN 108521873 A CN108521873 A CN 108521873A
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CN
China
Prior art keywords
circuit
earphone
voltage
resistance
control device
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Granted
Application number
CN201880000750.5A
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Chinese (zh)
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CN108521873B (en
Inventor
段红亮
杨旺旺
刘畅
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Shenzhen Goodix Technology Co Ltd
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Shenzhen Huiding Technology Co Ltd
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Publication of CN108521873A publication Critical patent/CN108521873A/en
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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
    • H04R1/1041—Mechanical or electronic switches, or control elements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers, loudspeakers or microphones
    • H04R3/007—Protection circuits for transducers

Abstract

This application provides a kind of control device of earphone and wired earphones.The control device of the earphone includes：Adverse current detection control circuit, the accumulator that control circuit is connected to the earphone is detected by the adverse current in the Mike end of the earphone, adverse current detection control circuit is used to compare the voltage at the Mike end of voltage and the earphone in the accumulator, and controls be electrically connected between the accumulator and the Mike end or electrically disconnected according to the result of the comparison.In the embodiment of the present invention, when voltage of the voltage of accumulator higher than the Mike end of earphone, control device can effectively prevent the charge in accumulator to be lost in the feeder ear of terminal device, to reduce the waste to charge, and then can avoid leading to the unexpected power down of earphone due to the loss of charge in accumulator.

Description

The control device and wired earphone of earphone
Technical field
The present embodiments relate to electronic technology fields, and more particularly, to a kind of control device of earphone and have Line earphone.
Background technology
With the rise of wearable healthy ancillary equipment, the physiological status detection that heart rate measurement becomes presently the most universal refers to Mark, ear have abundant capillary, have prodigious advantage on measuring the physiological signals such as heart rate, blood pressure, blood oxygen, have Carry out the primary condition of heart rate measurement.Vehicles Collected from Market has a kind of wireless heart rate test earphone.Specifically, pass through bluetooth (Bluetooth) so that earphone establishes connection with intelligent terminal, heart rate data or result of calculation are transmitted to mobile phone.But it is this Earphone needs internal battery, it is also desirable to charge, and of high cost, price is expensive.And traditional wire earphone generally only have voice transfer and These basic functions of music, button operation, if heart rate detecting function is integrated in wired earphone, due to being had The limitation of the power supply mode of line earphone, it is relatively low and internal resistance is higher with the output voltage of the feeder ear of the mobile phone of earphone pairing, not It is enough to provide enough electric energy for heart rate detecting function.
In the prior art, an accumulator can be set in earphone, the electricity for storing the Mike end from earphone Lotus.May be that earphone is normal by the accumulator in this way, even if the power supply capacity at the headset plug of terminal device is insufficient Power supply, prevents earphone in moment high-current consumption, causes power supply terminal voltage to decline excessive, and then influence ear-phone function.For example, Heart rate detecting function etc..But since accumulator is usually connected with the Mike end of earphone, when the voltage of accumulator is higher than ear When the voltage at the Mike end of machine, the charge in accumulator is lost in the feeder ear of terminal device, can cause unnecessary waste, Further, it is possible to lead to the unexpected power down of earphone.
Invention content
To solve the above-mentioned problems, this application provides a kind of control device of earphone and wired earphone, work as accumulator Voltage higher than earphone Mike end voltage when, control device can effectively prevent the charge in accumulator to terminal device Feeder ear be lost in, to reduce waste to charge, and then can avoid leading to ear due to the loss of charge in accumulator The unexpected power down of machine.
On the one hand, a kind of control device of earphone is provided, including：
Adverse current detection control circuit, the Mike end of the earphone detect control circuit by the adverse current and are connected to the ear The accumulator of machine, electricity of the adverse current detection control circuit for voltage and the Mike end in the accumulator Pressure, and being electrically connected between the accumulator and the Mike end or electrically disconnected is controlled according to the result of the comparison.
In the embodiment of the present invention, when adverse current detection control circuit determines that the voltage of accumulator is higher than the Mike end of earphone It, can be by electrically disconnected between the adverse current detection control circuit control accumulator and Mike end, to prevent energy storage electric when voltage Charge in road is lost in the feeder ear of terminal device, to reduce the waste to charge, and then can be avoided due to accumulator The loss of middle charge and lead to the unexpected power down of earphone.In addition, when adverse current detection control circuit determines that the voltage in accumulator is low When the voltage at Mike end, it can be detected by the adverse current and be electrically connected between control circuit control accumulator and Mike end, into And accumulator is enable to store the charge at the Mike end from earphone.
On the other hand, a kind of wired earphone is provided, including：Control device described in first aspect.
Description of the drawings
Fig. 1 is the structural schematic diagram of the wired earphone with 3.5mm audio connectors of the embodiment of the present invention.
Fig. 2 is the example of the 3.5mm audio interface of the terminal device corresponding with 3.5mm audio connectors of the embodiment of the present invention Figure.
Fig. 3 is the schematic block diagram of the biological characteristic detection module of the embodiment of the present invention.
Fig. 4 and Fig. 5 is the signal of design position of the biological characteristic detection module of this hair inventive embodiments in earplug Figure.
Fig. 6 is the schematic configuration diagram of the earphone for being built-in with biological characteristic detection module of this hair inventive embodiments.
Fig. 7 is the schematic diagram of the position of the adverse current detection control circuit of the earphone of the embodiment of the present invention.
Fig. 8 is the schematic diagram of the position of the supply voltage control circuit of the earphone of the embodiment of the present invention.
Fig. 9 is the schematic diagram of the position of the voltage protection circuit of the earphone of the embodiment of the present invention.
Figure 10 is the schematic diagram of the position of the signal isolation circuit of the embodiment of the present invention.
Figure 11 is the schematic block diagram of the earphone of the embodiment of the present invention.
The voltage oscillogram of feeder ear when Figure 12 is the feeder ear suspend mode of the terminal device of the embodiment of the present invention.
Figure 13 is the feeder ear of the terminal device of the feeder ear suspend mode of the embodiment of the present invention after power-supply circuit work Voltage oscillogram.
Figure 14 is the exemplary plot of a circuit design of the earphone of the embodiment of the present invention.
Figure 15 is an exemplary block diagram of the first voltage detection control circuit of the embodiment of the present invention.
Figure 16 is another exemplary block diagram of the first voltage detection control circuit of the embodiment of the present invention.
Figure 17 is the exemplary plot of another circuit design of the earphone of the embodiment of the present invention.
Specific implementation mode
The technical solution of the embodiment of the present invention is introduced below in conjunction with the accompanying drawings.
Fig. 1 is the structural schematic diagram of the wired earphone with 3.5mm audio connectors of the embodiment of the present invention.Fig. 2 is this hair The exemplary plot of the 3.5mm audio interface of the terminal device corresponding with 3.5mm audio connectors 110b of bright embodiment.As shown in Figure 1, The wired earphone 100 includes：3.5mm audio connector 110b, earphone cable 120, line traffic control plate 130 and earplug 140.Wherein, 3.5mm sounds Frequency connector 110b can be divided into：Microphone (MIC) communication connector 111b, equipment (GND) potential connector 112b, right earplug loudspeaker connect Head 113b and left earplug horn jonit 114b.3.5mm audio connectors 110b as shown in Figure 1 is connected with intelligent terminal and (i.e. will Earphone is inserted into intelligent terminal) when, microphone (MIC) communication connector 111b shown in FIG. 1, equipment (GND) potential connector 112b, Right earplug horn jonit 113b and left earplug horn jonit 114b respectively with microphone shown in Fig. 2 (MIC) communication interface 111a, Equipment (GND) interface 112a, right horn interface 113a be connected with left horn interface 114a, wherein microphone communication interface 111a, equipment interface 112a, right horn interface 113a and left horn interface 114a compositing terminal equipment audio interface 110a. In actual operation, digital analog converter (Digital to analog converter, DAC) converts digital signals into Analog signal (in the form of electric current, voltage or charge) is communicated with earphone or is powered for earphone.Further, microphone communicates Interface 111a is connected with the inside level 152 of terminal device, which is ear by microphone communication interface 111a Machine provides supply voltage, and in some embodiments, mi crophone communication interface 111a can also be known as the feeder ear of terminal device, For ease of description, below by taking the feeder ear of terminal device as an example.It should be understood that traditional wire earphone generally only have voice transfer and These basic functions of music, button operation.Wired earphone 100 in the embodiment of the present invention can be built-in with biological characteristic Detection module, the biological characteristic detection module can be any modules that can be detected to the physiological status of human body.For example, Can be biological characteristic detection module 711, pressure detecting module wears detection module, blood pressure detecting module, temperature check mould Block, blood sugar test module, other physiological signals such as lipids detection module or circuit module etc..It should also be understood that the application not office It is limited to PlayGear Stealth, is merely illustrative description herein.Wired earphone 100 in the embodiment of the present invention can be built-in with for showing Show the biological characteristic display module of the biological characteristic detection module testing result.
Fig. 3 is the schematic block diagram of the biological characteristic detection module of the embodiment of the present invention.As shown in figure 3, the biological characteristic Detection module 200 may include acquisition module 220 and calculation control module 210.Acquisition module 210 is for acquiring original heart rate Data (or treated heart rate data, or the heart rate result that is calculated)；Calculation control module 210 can be used for acquisition 220 collected heart rate data of module is handled and is calculated；Calculation control module 210 can be also used for and mobile phone and acquisition Module 220 is communicated；Calculation control module 210 can be also used for the entire biological characteristic detection module 200 of control or should The operating mode of part of module or circuit in biological characteristic detection module 200.In one embodiment, acquisition module 220 can be with Including heart rate sensor 221, light emitting diode (LED) 224, acceleration transducer 222 and optical design module 225, the heart rate Sensor 224 may include photodiode (PD) 223.Wherein, heart rate sensor 221 controls light emitting diode 224 and shines, hair The light gone out passes to photodiode 223 after skin histology acts on, and heart rate sensor 221 handles photodiode 223 and connects The optical signal received, and optical signal is quantified as electric signal, and digital signal is converted to by analog-to-digital conversion circuit, finally It is sent to standard digital communication interface.For example, I2C interface, SPI interface.In one embodiment, calculation control module 210 can With include power control module 211, micro-control unit (Microcontroller Unit, MCU) digital signal processing circuit (Digital Signal Processing, DSP) 212.The calculation control module 210 can be used for controlling acquisition module 220 Power supply, operating mode, calculating and the heart rate result etc. for indicating measurement.
Fig. 4 and Fig. 5 is the design position of the biological characteristic detection module 200 (especially acquisition module 220) in earplug Schematic diagram.As shown in figure 4, earplug 140 as shown in Figure 1 in the embodiment of the present invention may include：Earplug mechanism member 141 and such as Acquisition module 220 shown in Fig. 3.Specifically, which may include：Rear shell decoration, postposition shell, preposition shell, Silica gel sheath.As shown in figure 5, the earplug 140 can also include the horn module 142 and Duo Gen wire rod 123c, the more wire rods 123c is connected with horn module 142 and acquisition module 220 respectively.The biological characteristic detection module 200 in the embodiment of the present invention (especially acquisition module 220) can be arranged on the wired earphone can be close to any position of ear.
Fig. 6 is the ear for being built-in with biological characteristic detection module 200 (especially acquisition module 220) of this hair inventive embodiments The schematic configuration diagram of machine.As shown in fig. 6, acquisition module 220 is arranged on left earplug 340b, which controls mould Block 210 can be set in line traffic control plate 330.Beam splitter 322 is for dividing third harness 321 for the first harness 323-B and second Harness 323-A, the first harness 323-B are connected to third harness 323-C by the line traffic control plate 330.It should be understood that shown in fig. 6 each Connection relation between a function module is merely exemplary description, and the embodiment of the present invention is not specifically limited.For example, such as Fig. 6 Shown, acquisition module 220 is to be arranged on left earplug 340b.In other embodiments, acquisition module 220 can also be arranged on the right side On earplug 340a, or be arranged simultaneously on right earplug 340a and left earplug 340b etc..In another example as shown in fig. 6, the calculating Control module 210 can be set on line traffic control plate 330.In other embodiments, which can be set to the right side On earplug 340a and/or left earplug 340b, which, which can also integrate, is provided separately in earphone etc..This Inventive embodiments are not specifically limited.
Since the earphone in the embodiment of the present invention does not need battery, there is no need to charge, without carrying charge cable or filling Electric appliance.And it is easy to use, being inserted into target device (for example, mobile phone) can use, and then reduce the production cost of earphone.Into One step, the earphone in the embodiment of the present invention can be supported to complete heart rate measurement on earphone and indicate heart rate interval.But collect When being inserted into terminal device (such as mobile phone) at the earphone for having biological characteristic detection module, only microphone (MIC) line (i.e. earphone Mike end) there are electric current, i.e. cell phone system receives supply voltage only by the Mike end of earphone.And when the Mike end of earphone electricity When flowing through big or too small, the normal work of earphone can be all influenced.Further, since the audio signal that microphone generates is also by hand The MIC lines of generator terminal are transferred to mobile phone terminal.Therefore, for transmitted by power cord the equipment (such as mobile phone export MIC lines) of signal come The power-supply fluctuation interference said, cannot decayed to the signal to be transmitted on power cord, while system work can not be allowed to generate Signal on power cord, if being built-in with biological characteristic detection module in earphone, it is likely that so that being produced between both signals Raw interference, and then reduce user experience.
On the one hand, in order to the Mike end electric current for solving earphone is too small or the headset plug of terminal device at power supply capacity Insufficient problem can be a charge for storing the Mike end from earphone built in earphone in the embodiment of the present invention Accumulator may be ear by the accumulator in this way, even if the power supply capacity at the headset plug of terminal device is insufficient Machine normal power supply prevents earphone in moment high-current consumption, causes power supply terminal voltage to decline excessive, and then influence earphone just Normal voice transmission capabilities.
On the other hand, in order to ensure that the charge stored in accumulator will not discharge to terminal device, the embodiment of the present invention In, can be that earphone configures an adverse current detection control circuit.For example, as shown in fig. 7, the control device 400 of earphone can wrap Adverse current detection control circuit 420 is included, the Mike end 410 of the earphone detects control circuit 420 by the adverse current and is connected to the earphone Accumulator 430, adverse current detection control circuit 420 is used to compare the wheat of voltage and the earphone in the accumulator 430 Gram end 410 voltage, and according to the adverse current detection control circuit 420 comparison result control the accumulator 430 and the Mike Electrical connection or electrically disconnected between end 410.
In another aspect, in order to ensure in the case of there are accumulator, the supply voltage of earphone is still not enough to drive When modules or circuit in earphone work normally, earphone can work normally, and can be earphone in the embodiment of the present invention Further one supply voltage control circuit of configuration, the supply voltage control circuit can control in earphone at least one module or The supply voltage or power consumption of circuit, it is preferable that the supply voltage control circuit can control signal processing circuit in earphone Supply voltage.For example, as shown in figure 8, the control device 400 of earphone may include supply voltage control circuit 440, the earphone Mike end 410 is connected to the input terminal of the accumulator 430 of the earphone, energy storage electricity by the supply voltage control circuit 440 The output end on road 430 is connected to signal processing circuit 450 by supply voltage control circuit 440, the supply voltage control circuit The energy storage situation of the voltage condition at the 440 Mike end 410 for obtaining the earphone and/or the accumulator 430 of the earphone, and root The signal processing of the earphone is controlled according to the energy storage situation of the accumulator 430 of the voltage condition and/or earphone at the Mike end 410 The supply voltage of circuit 450.In other words, the supply voltage control circuit 440 be used for obtain earphone Mike's terminal voltage and/or The voltage condition of accumulator, and then control the supply voltage or operating mode of modules or circuit in earphone.
Correspondingly, for earphone Mike end electric current is excessive or the headset plug of terminal device at power supply capacity it is excessive The problem of, can be a voltage protection circuit built in earphone in the embodiment of the present invention.For example, as shown in figure 9, the control of earphone Device 400 processed may include voltage protection circuit 520, and when which is inserted into terminal device, which passes through this The Mike end 510 of earphone is connected with the feeder ear of the terminal device, and the voltage protection circuit 520 is for receiving feeder ear output Voltage and export the supply voltage of the earphone, wherein the voltage of feeder ear output is greater than or equal to the supply voltage.I.e. should Voltage protection circuit 520 can be greater than or equal to the supply voltage by controlling the voltage of feeder ear output, prevent the power supply The circuit of rear end is damaged when holding the voltage of output excessive, and then influences the normal work of earphone.As an example, the feeder ear exports Voltage be higher than threshold voltage when, which can be used for exporting the threshold voltage, the feeder ear output electricity It forces down when the threshold voltage, which can be used for exporting the voltage of feeder ear output.For example, the threshold Threshold voltage is 2.8 volts.
In addition, in order to ensure the power-supply fluctuation of system work generation not to be passed on power cord (such as mobile phone output MIC lines) Defeated signal, which generates, decays, and can be a signal isolation circuit built in earphone in the application so that earphone generated when working Power-supply fluctuation does not affect the signal transmitted on power cord.For example, as shown in Figure 10, the control device 400 of earphone can wrap Signal isolation circuit 630 is included, the Mike end 610 of the earphone is connected to the signal isolation circuit by the voice pickup circuit 620 630 one end, wherein voice pickup circuit 620 is used to the voice signal received being converted to electric signal.Signal isolation electricity Road 630 is for being isolated the electric signal and the circuit being connected with the other end of the signal isolation circuit 630 (power-supply fluctuation of generation) Between interference.
It is directed to the above-mentioned voltage protection circuit being related to, adverse current detection control circuit, signal isolation circuit below in conjunction with the accompanying drawings It is illustrated with the connection relation of supply voltage control circuit：
Figure 11 is the schematic block diagram of the Headphone structure of the embodiment of the present invention, and the solid line in Figure 11 can indicate to be electrically connected, Dotted line can indicate to communicate to connect.Specifically, which, which includes the connection relation of various circuits or module, to be presented as：Ear The Mike end of machine passes sequentially through voltage control circuit 701, adverse current detection control circuit 702, signal isolation circuit 703 and energy storage Circuit 704 is electrically connected to first voltage detection control circuit 705, and detects the electricity respectively of control circuit 705 by the first voltage It is connected to signal processing circuit 710, voice pickup circuit 709 and biological characteristic detection module 711.With signal processing circuit 710 For connection between first voltage detection control circuit 705, first voltage detection control circuit 705 is connected by solid line First voltage detection control circuit 705, which is can be understood as, to signal processing circuit 710 is connected to signal processing electricity Road 710.First voltage detection control circuit 705 is bidirectionally connected to signal processing circuit 710 and can be understood as this by a dotted line First voltage, which detects control circuit 705 and the signal processing circuit 710, can carry out two-way communication.In practical operation, the letter Number processing circuit 710 can send control signal by detecting control circuit 705 to the first voltage, to control the first voltage The conducting or shutdown being electrically connected between detection control circuit 705 and the signal processing circuit 710.Similarly, as shown in figure 11, should Power-supply circuit 707 can be communicatively connected to Mike end and the signal processing circuit 710 of earphone, which can be with It is communicatively connected to the Mike end of earphone, the biological characteristic detection module 711 and biological characteristic display module 712 can communicate respectively It is connected to signal processing circuit 710, which can also be communicatively connected to ear by telecommunication circuit 706 The Mike end of machine.
It should be appreciated that the connection relation of modules or circuit is merely illustrative in earphone shown in Figure 11, in other realities It applies in example, earphone may include partial circuit or module as shown in figure 11, for example, not including adverse current detection control circuit 702 or first voltage detection control circuit 705 etc..In another example the Mike end of earphone can pass through the voltage protection circuit 701 can also communicate to connect with signal processing circuit 710, that is, control the voltage protection circuit by signal processing circuit 710 701 operating mode (such as open or be not turned on).
For the voltage control at the Mike end of earphone, power-supply circuit 707 is introduced in the present embodiment.Terminal device as a result, Feeder ear output voltage it is too low when, the power-supply circuit 707 in the present embodiment can generate and the terminal being inserted into earphone is set Preparation send third signal, which is used to encourage the voltage of the feeder ear increase output of terminal device.Optionally at one In embodiment, which can be used for transmitting signal (such as by the voltage at the Mike end of mobile phone to terminal device Drag down), which is used for the power end output HIGH voltage of triggering terminal equipment.By taking terminal device is mobile phone as an example, for example, Figure 12 When the brownout at the Mike end of shown mobile phone, which can be by the voltage pull-down at the Mike end of mobile phone and maintenance (T ms as shown in fig. 13 that) for a period of time, the fan-out capability for improving the Mike end of mobile phone terminal again for triggering mobile phone.It needs It is noted that voice pickup circuit 709 shown in Figure 11 can be used for receiving external sound signal, it is reconverted into electric signal transmission To terminal device.In one optionally embodiment, in order to save power consumption, the power supply of the voice pickup circuit 709 can be by this The control of signal processing circuit 710 either other circuits or module.
It should be appreciated that the too low situation of the output voltage of the feeder ear of above-mentioned terminal device includes but not limited to following feelings Condition：The feeder ear (voltage at the microphone end of such as mobile phone 3.5mm mouthfuls output) of terminal device is unstable.Terminal device does not make When with microphone, i.e. the Mike end suspend mode of terminal device (showing as output voltage reduces internal resistance increase).Earphone keystroke is pressed When lower the case where brownout.By taking terminal device is mobile phone as an example, optionally, the powering mode of mobile phone 3.5mm interfaces can wrap It includes：Not at least one of powering mode, strong powering mode and weak powering mode.Mobile phone 3.5mm interfaces are in strong powering mode When, voice pickup circuit 709 can work normally, when mobile phone 3.5mm interfaces are in weak powering mode, voice pickup circuit 709 can not necessarily work normally.Voice pickup circuit 709 in the embodiment of the present invention can be microphone circuit, can also It is the other types of module for call, the embodiment of the present invention is not specifically limited.Optionally, handset port is in strong power supply When pattern, the inside level (as shown in Figure 2 152) of handset port can be higher than the supply voltage of 1.6v；And work as handset port When in weak powering mode, the inside level of handset port can be less than the supply voltage of 1.8v；It should be understood that different hands The strong and weak powering mode of machine has different.Above-mentioned number is merely illustrative.For example, in other embodiments, mobile phone When interface is in weak powering mode, the inside level of handset port can also be the supply voltage less than 1.7v.In reality In work, when corresponding mobile phone 3.5mm interfaces are in strong powering mode, sufficient supply voltage can be provided for earphone.However, When mobile phone 3.5mm interfaces are in weak powering mode, the supply voltage of earphone is suspend mode voltage (for example, from 2.7v operating voltages It is reduced to the suspend mode voltage of 1.4v).It should be noted that：Handset port is in the case where strong powering mode and may include：It is wired Earphone is inserted into mobile phone, and microphone related application is opened (such as call)；Alternatively, when no microphone applications program is opened When, i.e., voice pickup circuit 709 is in idle condition；For example, wired earphone be inserted into after a period of time in；In another example In a period of time after key press；Alternatively, microphone related application stop using after a period of time in.Correspondingly, other Period, handset port are in weak powering mode.
For the voltage detecting at the Mike end of earphone, second voltage detection control circuit 708 is introduced in the present embodiment, the Two voltage detecting and controling circuits 708 are configured to the voltage of the feeder ear of timely detection terminal equipment (such as 3.5mm mouthfuls of outputs of mobile phone The voltage at microphone end), i.e. Mike's terminal voltage of earphone can pass through signal when detecting that Mike's terminal voltage of earphone is too low Processing circuit 710 allows earphone to enter corresponding operating mode and is handled accordingly, such as enters low-power consumption mode, and carry out phase The action of pass exports higher voltage (such as triggering power-supply circuit 707 works) with triggering terminal equipment.In other words, this second Voltage detecting and controling circuit 708 measures the voltage condition at the Mike end of earphone, and the Mike end exported for characterizing mobile phone powers The signal of voltage condition is to signal processing circuit 710, so that the signal processing circuit enters accordingly according to this signal by earphone Operating mode is simultaneously handled accordingly.By taking voice pickup circuit 709 as an example, which detects control circuit 708 can be with It generates and sends fourth signal to the signal processing circuit 710, which is used to indicate the voltage shape at the Mike end of earphone Condition after the signal processing circuit 710 receives the fourth signal, can be based on the fourth signal and control power-supply circuit 709.
By terminal device be mobile phone for, the feeder ear of the mobile phone in the present embodiment for electric model can be voltage source+ The mode of resistance, the i.e. feeder ear of mobile phone can provide power supply, and can receive signal.As a result, in the embodiment of the present invention The weak current that accumulator 704 can be exported with the feeder ear of memory mobile phone starts subsequent conditioning circuit work when charge storage is enough.
For the accumulator 704, on the one hand, adverse current detection control circuit 702 is introduced in the embodiment of the present invention, It can be used for controlling the flow direction of electric current, specifically, when the feeder ear output voltage of mobile phone is higher, for being carried to system For electric energy, when the feeder ear output voltage of mobile phone is low, the charge loss of accumulator 704 is prevented.In other words, in the present embodiment Adverse current detection control circuit 702 can be used for limit electric current one-way flow, i.e., only allow feeder ear stream of the electric current from mobile phone Rearwards circuit prevents electric current from flowing to the feeder ear of mobile phone from circuit below.
On the other hand, first voltage detection control circuit 705 is introduced in the embodiment of the present invention, can be used for detecting storage The voltage of energy circuit 704, specifically, when first voltage detection control circuit 705 detects that the voltage on accumulator 704 reaches To system worked well voltage when, by the charge that is stored in the voltage at earphone Mike end and the accumulator 704 to ear Modules in machine or circuit power supply.When first voltage detection control circuit 705 detects the electricity on accumulator 704 When pressing through low, in earphone or earphone part of module or circuit send one remove piezoelectric voltage signal, system for prompting voltage is not It is enough just system and makes corresponding processing (as entered low-power consumption mode), or controls the confession of the part of module or circuit in earphone Piezoelectric voltage.In other words, first voltage detection control circuit 705 can be used for detecting the charge voltage of accumulator 704, when The storage voltage of detection accumulator 704 can provide electric energy when reaching a certain threshold value to the late-class circuit of accumulator 704, Further, signal processing circuit 710 can also be output signals to, how much is the charge storage of this characterization accumulator 704.
In addition, in practical communication, for the equipment (such as mobile phone exports MIC lines) for transmitting signal by power cord, It needs the signal for avoiding being transmitted on power cord to decay, while being also required to the power-supply fluctuation interference for avoiding earphone work from generating Signal on to power cord.Signal isolation circuit 703 in the embodiment of the present invention can allow both signals to generate isolation effect, It can prevent the signal (this signal is converted by sound and is transferred to mobile phone) of 709 output of isolation voice pickup circuit from declining Subtract, while can prevent because power-supply fluctuation caused by circuit works behind the signal isolation circuit 703 influences sound and picks up The output signal of sense circuit 709.
By taking terminal device is mobile phone as an example, the telecommunication circuit 706 in the present embodiment is responsible for the communication function of mobile phone and earphone. Telecommunication circuit 706 is by the data (heart rate value, system mode etc.) and biological characteristic detection module 711 of signal processing circuit 710 Data (heart rate initial data etc.) collect, mobile phone terminal is transferred to by the MIC feeder ears of mobile phone terminal.Mobile phone terminal is sent simultaneously The corresponding signal processing circuit 710 and raw of being sent to of data (telecommunication circuit 706 is transferred to by the right channel line of mobile phone) Object feature detection module 711.Optionally, telecommunication circuit 706 can also include push button signalling, and push button signalling is sent to mobile phone End.Wherein, which can be the control axis of entire earphone, and specifically, which can For reading the original data of biological characteristic detection module 711, and for calculating heart rate value.The signal processing circuit 710 can be used for the value or the section where biological characteristic that control biological characteristic display module 712 shows biological characteristic.The letter Number processing circuit 710 can be used for controlling the power supply of first voltage detection control circuit 705.The signal processing circuit 710 It can be also used for carrying out data exchange between telecommunication circuit 706.The signal processing circuit 710 can be also used for receiving the second electricity Pressure detection 708 output signal of control circuit, judges the voltage condition at the Mike end of earphone.The signal processing circuit 710 can be with It works for controlling power-supply circuit 707, triggers the Mike end output HIGH voltage of mobile phone.In addition, biological characteristic detection module 711 can Close to user's placed, to obtain the original heart rate data of user, biological characteristic display module 712 shows that active user's is aobvious The value for showing biological characteristic or the section where biological characteristic.
In practical operation, by taking terminal device is mobile phone as an example, the workflow of earphone may include：Earphone is inserted into mobile phone When the 3.5mm earpiece holes at end, the feeder ear output voltage of mobile phone, voltage control circuit 701 is prevented for limiting mobile phone output voltage Only mobile phone output voltage is excessively high, damages back-end circuit.Since entire earphone is inserted into for the first time, there is no charge in accumulator 704 Storage, electric current flow through adverse current detection control circuit 702 and signal isolation circuit 703 flow into storage by voltage protection circuit 701 Energy circuit 704 is stored.When first voltage detection control circuit 705 detects that the voltage of accumulator 704 reaches threshold value electricity When pressing (such as 2V), the accumulator 704 is to module or the circuit power supply of 704 rear end of accumulator, such as signal processing circuit 710, voice pickup circuit 709 and biological characteristic detection module 711 etc..The module or circuit of 704 rear end of accumulator After being powered, start to work normally.Further, after which is powered, control biological characteristic detection Module 711 simultaneously obtains corresponding heart rate initial data, and carries out the operation of heart rate signal, passes through biological characteristic display module 712 It shows.
When having by key pressing, telecommunication circuit 706 generates push button signalling, and the supply voltage at the Mike end of mobile phone is dragged down. On the one hand, the low voltage signal on the supply voltage at the Mike end of mobile phone is sent to letter by second voltage detection control circuit 708 Number processing circuit 710, signal processing circuit 710 handled accordingly to save power consumption, such as stop biological characteristic detection and aobvious Show, disconnects the power supply of voice pickup circuit 709.On the other hand, when having push button signalling generation, the confession at the Mike end of mobile phone Piezoelectric voltage can be less than the voltage of accumulator 704, and adverse current, which detects control circuit 702, will disconnect access, prevent accumulator 704 Electric charge stream turn round and stretch out the hand the Mike end of machine.When cell phone system is when using microphone, voice pickup circuit 709 can turn voice signal It is changed to electric signal, is transmitted to the output end of voltage protection circuit 701, to be transferred on the Mike end of mobile phone.Since adverse current is examined Survey the presence of control circuit 702 and signal isolation circuit 703 so that the output signal of voice pickup circuit 709 is not attenuated.Together When earphone when working the power-supply fluctuation that generates also due to the presence of signal isolation circuit 703 is not transmitted to the Mike end of mobile phone. It should be noted that for some mobile phones, when cell phone system does not use microphone, Mike end is possible to that suspend mode can be carried out, It is presented as that output voltage is lower, internal resistance increases, and power supply capacity dies down.At this time, on the one hand, adverse current detection control circuit 702 can be with Mike end for the flow of charge mobile phone for preventing accumulator 704.On the other hand, second voltage detects 708 meeting of control circuit It detects this signal, and issues a signal to signal processing circuit 710, signal processing circuit 710 detects that mobile microphone is powered Suspend mode then sends and takes electric signal to power-supply circuit 707, and power-supply circuit 707 can trigger mobile phone, the feeder ear of mobile phone is promoted to export Voltage be high voltage.
In conclusion in the embodiment of the present invention, by introducing power-supply circuit 707, second voltage detects control circuit 708, Adverse current detection control circuit 702 and first voltage detect control circuit 705 so that when the brownout at the Mike end of earphone, The voltage of the increased feeder ear output of terminal device can be encouraged by power-supply circuit 707.Also, signal processing circuit 710 can detect the voltage condition at the Mike end of the measurement earphone of control circuit 708 and/or first voltage inspection according to the second voltage The charge condition for surveying the accumulator that control circuit 705 measures allows earphone to enter corresponding operating mode and is located accordingly Reason, and then be the modules or circuit reasonable distribution electric energy in earphone.In addition, adverse current detection control circuit 702 can have Effect prevents the charge in accumulator to be lost in the feeder ear of mobile phone, avoids the waste to charge in accumulator.Finally, believe Number isolation circuit 703 can effectively reduce the interference between voice pickup circuit 709 and back-end circuit.
It should be appreciated that signal processing circuit 710 shown in Figure 11 can be according to the module or circuit (example in the earphone Such as, second voltage detection control circuit 708 and/or first voltage detect control circuit 705) testing result, control the signal Other circuits or module are (for example, power-supply circuit 707, biological characteristic detection module 711 in processing circuit 710 and the earphone And biological characteristic display module 712) supply voltage.The signal processing circuit 710 can be micro-control unit (Microcontroller Unit, MCU) digital signal processing circuit (Digital Signal Processing, DSP), use In the power supply, operating mode and the data that control modules or circuit in earphone, more specifically, for according to actual demand The operating mode (that is, power consumption) of each circuit or module in wired earphone is controlled.For example, calculating and indicating to survey Heart rate result of amount etc..And the voltage protection circuit 701 of the embodiment of the present invention is used to control the Mike end by the earphone With the output voltage of the feeder ear of the terminal device, the i.e. control to the input voltage of earphone.It is also understood that Fig. 3 institutes The calculation control module 210 shown can be used for controlling power supply, operating mode, calculating and the heart for indicating measurement of acquisition module 220 Rate result is exemplary description.But implementation of the present invention is without being limited thereto.For example, in other embodiments, the calculation control module 210 can also be integrally disposed with the signal processing circuit 710, that is, the acquisition module 220 can be individually designed, thus the acquisition After module 220 collects data, the data of acquisition can be sent to signal processing circuit 710, be controlled by signal processing circuit 710 Power supply, operating mode, calculating and the heart rate result for indicating measurement of acquisition module 220 processed.
It is also understood that either module can be separately as the control device or electricity of earphone for each circuit shown in Figure 11 Road produce, can also segment set become earphone control device produce, can also be fully integrated on an object be used as earphone Master control device production, the embodiment of the present invention is not specifically limited.For example, the voltage protection circuit 701 can be wired ear One component of machine is produced, and can also be integrated in signal processing circuit 710 and be produced, that is, as signal processing electricity The component part on road 710.For Fig. 6, each circuit shown in Figure 11 either module can it is independent or it is integrally disposed in In the line traffic control plate of the wired earphone, can also individually or be integrally disposed on earplug (right earplug 340a and left earplug 340b). In other embodiments, each circuit or module can split into multiple modules shown in Figure 11 or circuit is respectively arranged at line It controls on version 330, left earplug 340b and right earplug 340a.The embodiment of the present invention is not specifically limited.Further, the present invention is real The modules being related to or circuit for applying example can be built in any wired earphone, and the wired earphone and intelligent terminal are mating It uses.Especially has the intelligent terminal of 3.5mm audio output interfaces.Such as：Mobile phone, tablet computer, laptop, electricity Brain, MP3 and MP4 etc..The embodiment of the present invention by control device only to be built in wired earphone, wired earphone and mobile phone is mating makes Scene illustrates, but the embodiment of the present invention is without being limited thereto.
Figure 14 is the exemplary plot of a circuit design of the earphone of the embodiment of the present invention.Figure 15 is the first voltage inspection of Figure 11 Survey an exemplary plot of control circuit 705.Figure 16 is another exemplary plot of the first voltage detection control circuit 705 of Figure 11. Figure 17 is the exemplary plot of another circuit design of the earphone of the embodiment of the present invention.With reference to physical circuit design to above-mentioned each A circuit and module illustrate.
For the particular circuit configurations for countercurrently detecting control circuit 702 shown in Figure 11：
In one example, as shown in figure 14, adverse current detection control circuit 702 may include：Resistance 813, resistance 814, resistance 819, resistance 815, switch 817, diode 818, comparator 820 and NOT gate 816.Specifically, with terminal device For mobile phone, when electric current flows to late-class circuit (such as capacitance 821, capacitance 822) from the Mike end of mobile phone so that comparator 820 reversed terminal voltage is higher than in-phase end voltage, and the output of comparator 820 is low level, after NOT gate 816, controls switch 817 It is closed.Here, diode 818 provides access for electric current.When electric current flows to the Mike end of mobile phone from rear end, comparator 820 The voltage of in-phase end is higher than reverse side, and the output of comparator 820 is high level, and controlling switch 817 by NOT gate 816 disconnects.This moment Diode 818 is in reverse phase cut-off state, can prevent charge loss in energy-storage module.In other words, when button 802 is pressed When, the voltage on earphone Mike end is lower, and charge can be from storage capacitor 822, by resistance 823, switch 817, resistance 814, LDO 804, resistance 801 and the flow direction of button 802 ground.Current flowing resistance 814 makes the in-phase end voltage of comparator 820 be higher than reverse side Voltage.The output of comparator 820 is high level, and switch 817 disconnects.It is due to there are feedback resistance 815, comparator 820 being made to export It can ensure that the in-phase end voltage of comparator is always more than reversed terminal voltage when high level voltage, ensure that switch 817 is constantly in Off-state.
In another example, as shown in figure 17, adverse current detection control circuit 702 may include：Metal-oxide-semiconductor 917, comparator 920 and resistance 919；The Mike end is connected to the accumulator 704 by the metal-oxide-semiconductor 917；The negative input end of the comparator 920 Be connected with the Mike end of the earphone, the positive input terminal of the comparator 920 is connected with the accumulator 704, the comparator 920 it is defeated Outlet is connected to the grid of the metal-oxide-semiconductor 917 by the resistance 919.Further, control circuit 702 is detected in order to improve the stream Performance, that is, improve the prevention effect that is lost in the feeder ear of terminal device of charge in accumulator, which controls Circuit 702 can also include：Metal-oxide-semiconductor 916 and resistance 918；The drain electrode of the metal-oxide-semiconductor 917 is connected with the drain electrode of the metal-oxide-semiconductor 916；It should Comparator 920 is connected to the grid of the metal-oxide-semiconductor 916 by the resistance 918.Further, it is controlled to improve stream detection The performance of circuit 702, adverse current detection control circuit 702 can also include：3rd resistor (does not indicate) in figure；The metal-oxide-semiconductor 917 It is connected to the metal-oxide-semiconductor 916 by the 3rd resistor.In actual operation, when the voltage at the Mike end of earphone is higher than capacitance 923 When voltage, the output of comparator 920 is low level, and metal-oxide-semiconductor 916 and metal-oxide-semiconductor 917 are connected, and electric current flows to electricity from the Mike end of earphone Hold 923 and capacitance 924.When the output voltage at the Mike end of earphone is less than the voltage of capacitance 923, the output of comparator 920 is High level.Metal-oxide-semiconductor 917 and metal-oxide-semiconductor 916 end, to prevent charge to be lost in from capacitance 923 and capacitance 924 to the Mike end of earphone. It further, can be in metal-oxide-semiconductor 917 and MOS in order to increase the voltage difference between 920 in-phase end of first comparator and reverse side Series resistance between pipe 916 allows the electric current for flowing through metal-oxide-semiconductor 917 and metal-oxide-semiconductor 916 also to flow through the resistance.
For the particular circuit configurations of signal isolation circuit shown in Figure 11 703：
In one example, as shown in figure 14, which may include：Resistance 814, resistance 823, electricity Hold 821 and capacitance 822；The voice pickup circuit 709 is connected with one end of the resistance 814, and the other end of the resistance 814 passes through this Capacitance 821 is connected to the ground, and the other end of the resistance 814 is also connected to one end of the capacitance 822, the capacitance by the resistance 823 822 other end ground connection.Wherein, the voice signal of 806 output of microphone (MIC) is isolated in resistance 814 and capacitance 821, prevents MIC The voice signal of 806 outputs has excessive decaying and interference late-class circuit work；Resistance 823, capacitance 821 and capacitance 822 are used Power supply noise, which is generated, in filtering appts work interferes with front stage circuits.In one possible implementation, the capacitance 821 and/ Or the capacitance 822 may be constructed the accumulator 704 of the earphone, for being stored simultaneously to the weak current at the Mike end to earphone For other circuits or module for power supply.
In another example, as shown in figure 17, which may include：Low pressure difference linear voltage regulator (LDO) 921, resistance 922, capacitance 923 and capacitance 924；The Mike end is connected to adverse current detection by voltage control circuit 701 and controls The output end of the input terminal of circuit 702 processed, the adverse current detection control circuit is connected with one end of the LDO 921, the LDO's 921 The other end is connected to the ground by the capacitance 923, and the other end of the LDO 921 is also connected to the capacitance 924 by the resistance 922 One end, 924 other end of capacitance ground connection.Specifically, which can be used for preventing the signal decaying that MIC 909 is exported.It is former Reason is as follows, it is assumed that setting 921 output voltages of LDO are relatively low (such as 2V), when the input power of LDO 921 is higher than 2V, even if input terminal Power-supply fluctuation will not influence to export.In one possible implementation, the capacitance 923 and/or the capacitance 924 can be with structures At the accumulator 704 of the earphone.
For the particular circuit configurations of voice pickup circuit 709 shown in Figure 11：
As an example, as shown in figure 14, which may include：Capacitance 805, microphone 806, Capacitance 807, resistance 808, switch 809 and inverter circuit 810；The Mike end of the earphone is connected with one end of the capacitance 805, the capacitance 805 other end is connected by the microphone 806 with one end of the capacitance 807, and one end of the capacitance 807 passes through the resistance 808 It is connected to one end of the switch 809, the other end of the switch 809 is connected with the Mike end of earphone, another termination of the capacitance 807 Ground；The signal processing circuit 710 of the earphone is used to control the on or off of the switch 809.In other words, voice pickup circuit 709 can be made of capacitance 805, microphone 806, capacitance 807, resistance 808, switch 809 and inverter circuit 810.In the present embodiment, The signal processing circuit 710 can be MCU 933, and the voice pickup circuit 709 power supply is switched by MCU 933 by controlling 809 realize.Microphone 806 converts sound into electric signal, is transmitted on mobile microphone feeder ear by capacitance 805.
The particular circuit configurations of control circuit 708 are detected for second voltage shown in Figure 11：
As an example, as shown in figure 14, second voltage detection control circuit may include：Resistance 811 and resistance 812；By taking the signal processing circuit 710 is MCU 833 as an example, the Mike end of the earphone is connected to the resistance by the resistance 811 812 one end, the Mike end of the earphone are connected to the signal processing circuit 710 by the resistance 811, the resistance 812 it is another End ground connection.In the present embodiment, partial pressure value can be obtained after being divided by resistance 811 and resistance 812, which is input to In MCU 833, can by comparator analog-digital converter in MCU 833 (Analog-to-Digital Converter, The modules detection such as ADC), signal processing function can be provided in this MCU 833.
In addition, the connection for signal processing circuit 710 shown in Figure 11 and first voltage detection control circuit 705 is closed System.As an example, as shown in figure 14, by taking the signal processing circuit 710 is MCU 833 as an example, first voltage detection control The output end of circuit 824 processed is connected to the first input end of this or circuit 825, and first voltage detection control circuit 824 is used for It generates and sends the first information to this or circuit 825.Control circuit is detected by the second voltage and (is not marked in the Mike end of the earphone Show) it is connected to one end of MCU 833, which detects the other end and the second input of this or circuit 825 of control circuit End is connected, and the MCU 833 is for generating and sending second signal to this or circuit 825.In actual operation, due to or circuit 825 the characteristics of being dual input or door or door were exactly height there are one be height output.Therefore, which detects control circuit 824 When detecting that the voltage of accumulator 703 reaches threshold voltage, which detects control circuit 824 and exports high level, should Or circuit 825 also exports high level.In addition, when the MCU 833 has electricity, the MCU 833 to or circuit 825 export high level, should Or circuit 825 also exports high level, even if in this way, can if when the first voltage detection output of control circuit 824 is low level Ensure that circuit 825 exports height, the accident for preventing MCU 833 etc. and frequently power-off.Meanwhile the first voltage detects control circuit 824 can also send the energy storage condition information of accumulator to MCU 833, optionally, when the first voltage detects control circuit When 824 outputs are low level, accumulator undertension can be indicated, and then MCU 833 can be carried out operating accordingly and be lowered Overall power.
It should be noted that first voltage detection control circuit 824 shown in Figure 14 may be configured with hysteresis voltage detection work( Energy.For example, when the voltage on accumulator 704 reaches 2V, output is high level, until 704 voltage of accumulator is down to 1.85V, output are just low level.In actual operation, when the first voltage detection output of control circuit 824 is high level When or circuit 825 also to export be high level, thus closure switch 826 give the power supplies of MCU 833, while the output pin of MCU 833 It may be coupled to or another input terminal of circuit 825, i.e. MCU 833 exports high level and arrives or the input of circuit 825 after the power is turned on End, it can also be used to the normal power supply of MCU 833 is maintained, as long as thus first voltage detection control circuit 824 and MCU 833 appoint One output is high level it is ensured that MCU 833 has electricity.Further, MCU 833 can pass through the conducting of control switch 828 Or turn off to control the power supply of biological characteristic detection module 830, MCU 833 can be also used for calculating the current biology spy of user The value (such as heart rate value) of sign, and shown by LED 832.When MCU 833 calculates the value of biological characteristic, if system Power consumption is excessive, and voltage on storage capacitor 822 can be made to be less than 1.85V, and it is low level that first voltage, which detects the output of control circuit 824, MCU 833 obtains this signal simultaneously, and using corresponding measure, (as stopped heart rate acquisition and calculating, MCU 833 enters sleep mould Formula), reduce system power dissipation.
The particular circuit configurations of control circuit 705 are detected for first voltage shown in Figure 11：
As an example, as shown in figure 15, first voltage detection control circuit 824 may include：Resistance 401, electricity Resistance 402, resistance 403, comparator 404, comparator 405 and trigger 406；One end of the resistance 401 and 704 phase of accumulator Even, the other end of the resistance 401 is connected to one end of the resistance 403 by the resistance 402, and the other end of the resistance 403 is grounded, The other end of the resistance 401 is connected with the negative input end of the comparator 404, and one end of the resistance 402 and the comparator 405 are just Input terminal is connected, and the negative input end of the positive input terminal of the comparator 404 and the comparator 405 receives reference voltage, the comparator 404 output end is connected with the R input of the trigger 406, and the output end of the comparator 405 and the S of the trigger 406 are inputted End is connected.In other words, resistance 401, resistance 402 and resistance 403 are connected, and the connection of resistance 401 is tested voltage, and resistance 403 connects Ground, and to tested voltage (Vi) partial pressure；The homophase input of comparator 404 terminates reference voltage, 401 He of reverse input end connecting resistance The intersection of resistance 402, the ends R of the output end in contact hair device 406 of comparator 404.The in-phase input end of comparator 405 is connected to The reverse input end of the intersection of resistance 401 and resistance 402, comparator 405 connects reference voltage, and output end is connected to trigger 406 ends S；Using the Q of trigger 406 as the signal of voltage detecting.
According to 406 output state equation of triggerIt is found that when the brownout of tested voltage (Vi), So that the anti-phase input terminal voltage of comparator 404 is less than reference voltage.At this point, the output of comparator 404 is high level, comparator 405 outputs are low level, then the ends the Q output of trigger 406 is low level.When Vi voltages gradually rise so that comparator 404 The voltage of reverse input end is higher than reference voltage, but the homophase input terminal voltage of comparator 405 is less than reference voltage, at this point, The output of comparator 404 is low level, and the output of comparator 405 is low level, then the ends the Q output of trigger 406 is low level.Work as Vi Voltage increases again so that the reverse input end voltage of comparator 404 is higher than reference voltage, the in-phase input end of comparator 405 Higher than reference voltage, then the output of comparator 404 is low level, and the output of comparator 405 is high level, then the ends Q of trigger 406 are defeated Go out for high level.If at this time be tested voltage be decreased to comparator 404 reverse input end voltage be more than reference voltage, but compare Voltage compared with the in-phase input end of device 405 is less than reference voltage.At this point, the output of comparator 404 is low level, comparator 405 is defeated Go out for low level, but the previous state at the ends Q of trigger 406 is high level, therefore the current state at the ends Q of trigger 406 Also it is high level.Tested voltage continues to reduce, and the reverse input end voltage down to comparator 404 is less than reference voltage, comparator 405 homophase input terminal voltage is less than reference voltage, then the output of comparator 404 is high level, and the output of comparator 405 is low electricity It is flat.The ends the Q output of current trigger 406 is low level.Thus, it is possible to realize the detection of hysteresis voltage.In the present embodiment, pass through The ratio of regulation resistance 401, resistance 402 and resistance 403 can also adjust the detection range of hysteresis voltage.
As another example, as shown in figure 16, first voltage detection control circuit 824 may include：Resistance 407, electricity Resistance 409, resistance 408 and comparator 411；The accumulator 704 is connected to one end of the resistance 409, the electricity by the resistance 407 The other end of resistance 409 is connected with the output end of the comparator 411, and the negative input end of the comparator 411 receives reference voltage, the ratio Positive input terminal compared with device 411 is connected to the ground by the resistance 408.In other words, the connection of resistance 407 is tested voltage and comparator 411 in-phase input end, resistance 409 connect the output end and in-phase input end of comparator 411, and resistance 408 connects comparator 411 In-phase input end and ground, the inverting input of comparator 411 connect reference voltage.In actual operation, when tested voltage foot Enough low, so that the voltage of the in-phase input end of comparator 411 is less than reference voltage, then the output of comparator 411 is low level.When When tested voltage increases, the homophase input terminal voltage of comparator 411 is total resistance value and electricity after resistance 408 is in parallel with resistance 409 The partial pressure of resistance 407.When the homophase input terminal voltage that voltage is increased to comparator 411 is higher than reference voltage, comparator 411 exports It is equivalent to the computation model for changing 411 homophase input terminal voltage of comparator this moment for high level.When voltage declines certain value So that the voltage of the in-phase input end of comparator 411 is less than reference voltage level, then it is low level that comparator 411 exports again.It can To find, comparator 411 is high low to exporting from output, with the output of comparator 411 be low level to exporting is high level, same to phase The voltage computation model of input terminal is different, therefore the two surveys voltage threshold difference.In other words, comparator 411 is exported from low electricity The threshold value for putting down high level is more than threshold value from high to low level so that first voltage detection control circuit 705 realizes Hysteresis voltage detects.
For the particular circuit configurations of power-supply circuit shown in Figure 11 707：
As an example, as shown in figure 14, which may include：Switch 803；The Mike end passes through this Switch 803 is connected to the ground.By taking terminal device is mobile phone as an example, when cell phone system does not use microphone, the Mike end of mobile phone is stopped It sleeps, is presented as that the output voltage at the Mike end of mobile phone is lower, power supply capacity dies down.And the Mike end output voltage of mobile phone is lower (being less than 822 voltage of storage capacitor), charge can be made to flow back to the Mike end of mobile phone in storage capacitor 822.This moment, comparator 820 Output is high level, and then controls switch 817 and disconnect.Meanwhile by taking signal processing circuit 710 is MCU 833 as an example, MCU 833 It can detect that the Mike end of mobile phone, will in dormant state by second voltage detection control circuit (resistance 811 and resistance 812) By controlling switch 803, mobile phone output HIGH voltage is triggered.Optionally, triggering mode can be the Mike end suspend mode in mobile phone By the voltage pull-down 25ms at the Mike end of mobile phone after 40ms.
As shown in figure 14, by taking signal processing circuit 710 is MCU 833 as an example, the accumulator 704 of the earphone can also lead to The biological characteristic detection module 830 that switch 828 is connected to the earphone is crossed, MCU 833 is used to control conducting or the pass of the switch 828 It is disconnected.In other words, the power supply of biological characteristic detection module 830 by MCU 833 control.By taking terminal device is mobile phone as an example, When mobile phone, which needs to send to earphone, orders, it is only necessary to send specific waveform on right channel.MCU 833 and biological characteristic inspection Instruction will be received by surveying module 830, MCU 833 can be allowed to stop the calculating and display of biological characteristic by this operation, allowed simultaneously Data are sent data to mobile phone by biological characteristic detection module 830 by Mike end, to carry out the meter of biological characteristic in mobile phone It calculates and shows.Further, as shown in figure 14, which can be by internal integrated circuit (IIC)/serial Peripheral Interface (SPI) carries out two-way communication with MCU 833.As shown in figure 14, as an example, the capacitance in the accumulator 822 can also be connected with one end of low pressure difference linear voltage regulator (LDO) 827, and the other end of the LDO 827 can also pass through capacitance 829 are connected to the ground, and the other end of the LDO 827 can also be connected to the biological characteristic detection module 830 by the switch 828, Further, the other end of the LDO 827 can also be connected to the ground by capacitance 831, and then increase the working performance of circuit.
It should be understood that above in association with connection relation between modules or circuit shown in Figure 14 to Figure 17, modules or The particular circuit configurations of person's circuit are merely illustrative description, identical for circuit structure in Figure 14 and Figure 17 to avoid repeating Part repeats no more (for example, power-supply circuit and second voltage detection control circuit and telecommunication circuit).
In the embodiment of the present invention, by increasing biological characteristic on traditional wired earphone with 3.5mm audio interface Detection module so that traditional wire earphone has the function of detection biological characteristic (for example, heart rate).In addition, by increasing biology Feature display module can be with real-time display testing result.As an example, which includes multiple shine Diode (LED).As shown in figure 11, which can also include biological characteristic display module 712.Further, as shown in figure 14, Biological characteristic display module can pass through light emitting diode (Light-Emitting Diode, LED) 832 or organic light-emitting diodes The value for managing (Organic Light-Emitting Diode, OLED) or other visualization devices instruction biological characteristic, with heart rate For intensity, such as：The heart rate intensity interval that the LED indication of several different colors can be utilized different.For example, blue can be used LED represents heart rate between 30BPM~80BPM；Wherein, green LED represents heart rate between 80~110BPM；It is represented with red Between 110~150BPM；Between 150~180BPM being represented with yellow；With it is orange represent heart rate interval 180~220BPM it Between.It should be understood that above-mentioned heart rate intensity interval and indicating mode are only the example of the embodiment of the present invention, the embodiment of the present invention is not limited to This.For example, while biological characteristic display module 712 can be with display color, different flicker frequencies can also be coordinated to indicate the heart Rate speed.For example, when heart rate LED flicker frequencies are higher, heart rate is corresponding also higher.In another example biological characteristic display module 712 Heart rate interval can also be indicated by different flash speeds using a LED.
Since the earphone in the embodiment of the present invention does not need battery, there is no need to charge, without carrying charge cable or filling Electric appliance.And it is easy to use, being inserted into target device (for example, mobile phone) can use, and then reduce the production cost of earphone.Into One step, the earphone in the embodiment of the present invention can be supported to complete heart rate measurement on earphone and indicate heart rate interval, further Ground, by the way that an accumulator is arranged in earphone, the charge for storing the Mike end from earphone.In this way, even if terminal Power supply capacity at the headset plug of equipment is insufficient, may be earphone normal power supply by the accumulator, prevents earphone from existing When moment high-current consumption, power supply terminal voltage is caused to decline normal voice transfer function that is excessive, and then influencing earphone.Further Ground, damage rear end when by the way that voltage that the feeder ear exports for a voltage protection circuit built in earphone, can be prevented excessive Circuit, and then influence the normal work of earphone.Further, by for a signal isolation circuit built in earphone, making earphone It carries out biological characteristic detection and listens to music, be independent of each other using microphone.Further, by for an adverse current built in earphone Control circuit is detected, can be prevented because mobile phone output voltage reduces suddenly, the charge loss of caused earphone accumulator, into And avoid the unexpected power down of earphone.It further, can be with real-time control by for a supply voltage control circuit built in earphone The supply voltage of signal processing module.
Those of ordinary skill in the art may realize that lists described in conjunction with the examples disclosed in the embodiments of the present disclosure Member and circuit can be realized with the combination of electronic hardware or computer software and electronic hardware.These functions are actually with hard Part or software mode execute, and depend on the specific application and design constraint of technical solution.Professional technician can be with Each specific application is used different methods to achieve the described function, but this realization is it is not considered that exceed this Shen Range please.In several embodiments provided herein, it should be understood that disclosed circuit, branch and unit, it can be with It realizes by another way.For example, branch described above is schematical, for example, the division of the unit, only one Kind of division of logic function, formula that in actual implementation, there may be another division manner, such as multiple units or component can combine or It is desirably integrated into a branch, or some features can be ignored or not executed.If the integrated unit is with software function list The form of member is realized and when sold or used as an independent product, can be stored in a computer read/write memory medium In.Based on this understanding, the technical solution of the application substantially in other words the part that contributes to existing technology or should The part of technical solution can be expressed in the form of software products, which is stored in a storage medium In, including some instructions use is so that a computer equipment (can be personal computer, server or the network equipment etc.) Execute all or part of step of each embodiment the method for the application.And storage medium above-mentioned includes：USB flash disk, movement are hard Disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), The various media that can store program code such as magnetic disc or CD.
The above, the only specific implementation mode of the application, but the protection domain of the application is not limited thereto, it is any Those familiar with the art can easily think of the change or the replacement in the technical scope that the application discloses, and should all contain It covers within the protection domain of the application.Therefore, the protection domain of the application should be subject to the scope of the claims.

Claims (19)

1. a kind of control device of earphone, which is characterized in that including：
Adverse current detection control circuit；
The accumulator that control circuit is connected to the earphone, the adverse current are detected by the adverse current in the Mike end of the earphone Voltage of the control circuit for voltage and the Mike end in the accumulator is detected, and is controlled according to the result of the comparison Make being electrically connected between the accumulator and the Mike end or electrically disconnected.
2. control device according to claim 1, which is characterized in that the adverse current detects control circuit and includes：
First metal-oxide-semiconductor, first comparator and first resistor；
The Mike end is connected to the accumulator by first metal-oxide-semiconductor；
The negative input end of the first comparator is connected with the Mike end of the earphone, the positive input terminal of the first comparator with The accumulator is connected, and the output end of the first comparator is connected to first metal-oxide-semiconductor by the first resistor Grid.
3. control device according to claim 2, which is characterized in that the adverse current detects control circuit and further includes：
Second metal-oxide-semiconductor and second resistance；
The drain electrode of first metal-oxide-semiconductor is connected with the drain electrode of second metal-oxide-semiconductor, source electrode and the storage of second metal-oxide-semiconductor Energy circuit is connected；
The output end of the first comparator is connected to the grid of second metal-oxide-semiconductor by the second resistance.
4. control device according to claim 3, which is characterized in that the adverse current detects control circuit and further includes：
3rd resistor；
First metal-oxide-semiconductor is connected to second metal-oxide-semiconductor by the 3rd resistor.
5. control device according to any one of claim 1 to 4, which is characterized in that the control device further includes：
The Mike end of signal isolation circuit, the earphone is connected to the signal isolation circuit by the voice pickup circuit of earphone One end, the voice pickup circuit is used to the voice signal received being converted to electric signal；The signal isolation circuit is used In the interference being isolated between the electric signal and the circuit being connected with the other end of the signal isolation circuit.
6. control device according to claim 5, which is characterized in that the signal isolation circuit includes：
Current limiting element, the 5th resistance, the first capacitance and the second capacitance；
The voice pickup circuit is connected with one end of the current limiting element, and the other end of the current limiting element passes through described first Capacitance connection to ground, the other end of the current limiting element is also connected to one end of second capacitance by the 5th resistance, The other end of second capacitance is grounded；
Wherein, the current limiting element is the 4th resistance or the first low pressure difference linear voltage regulator LDO.
7. control device according to claim 5 or 6, which is characterized in that the voice pickup circuit includes：
Third capacitance, microphone, the 4th capacitance, the 6th resistance, first switch and inverter circuit；
The Mike end of the earphone is connected with one end of the third capacitance, and the other end of the third capacitance passes through the Mike Wind is connected with one end of the 4th capacitance, and one end of the 4th capacitance is connected to described first by the 6th resistance and opens One end of pass, the other end of the first switch are connected with the Mike end, the other end ground connection of the 4th capacitance.
8. control device according to any one of claim 1 to 7, which is characterized in that the control device further includes：
Supply voltage control circuit, the supply voltage of the signal processing circuit for controlling the earphone；
Wherein, the supply voltage control circuit includes：
First voltage detects control circuit or circuit and second switch；
The output end of the first voltage detection control circuit is connected to described or circuit first input end, the first voltage Control circuit is detected for generating and sending the first signal to described or circuit；
The output end of the signal processing circuit is connected with described or circuit the second input terminal, and the signal processing circuit is used for It generates and sends second signal to described or circuit；
The accumulator is connected to the signal processing circuit by the second switch；
Described or circuit is for receiving first signal and the second signal, and according to first signal and/or described Second signal controls the on or off of the second switch.
9. control device according to claim 8, which is characterized in that the first voltage detects control circuit and includes：
7th resistance, the 8th resistance, the 9th resistance, the second comparator, third comparator and trigger；
One end of 7th resistance is connected with the accumulator, and the other end of the 7th resistance passes through the 8th resistance Be connected to one end of the 9th resistance, the other end ground connection of the 9th resistance, the other end of the 7th resistance with it is described The negative input end of second comparator is connected, and one end of the 8th resistance is connected with the positive input terminal of the third comparator, institute The negative input end of the positive input terminal and the third comparator of stating the second comparator receives reference voltage, second comparator Output end is connected with the R input of the trigger, the output end of the third comparator and the S input terminal phases of the trigger Even；
Alternatively, the first voltage detection control circuit includes：
Tenth resistance, eleventh resistor, twelfth resistor and the 4th comparator；
The accumulator is connected to one end of the eleventh resistor by the tenth resistance, the eleventh resistor it is another One end is connected with the output end of the 4th comparator, and the negative input end of the 4th comparator receives reference voltage, and described the The positive input terminal of four comparators is connected to the ground by the twelfth resistor.
10. control device according to any one of claim 1 to 9, which is characterized in that the control device further includes：
Power-supply circuit；
The Mike end of the earphone is connected to the signal processing circuit of the earphone, the signal processing by the power-supply circuit Circuit is used to control the terminal device transmission third signal that the power-supply circuit is generated and is inserted into the earphone, the third letter Number for encourage the terminal device increase the terminal device feeder ear output voltage.
11. control device according to claim 10, which is characterized in that the power-supply circuit includes：
Third switchs；
The Mike end is connected to the ground by third switch.
12. control device according to any one of claim 1 to 11, which is characterized in that the control device further includes：
Second voltage detects control circuit；
The signal processing circuit that control circuit is connected to the earphone is detected by the second voltage in the Mike end of the earphone Input terminal, second voltage detection control circuit is for generating and sending fourth signal, institute to the signal processing circuit State voltage condition of the fourth signal for indicating the Mike end.
13. control device according to claim 12, which is characterized in that the second voltage detects control circuit and includes：
Thirteenth resistor and the 14th resistance；
The Mike end of the earphone is connected to one end of the 14th resistance, the wheat of the earphone by the thirteenth resistor Gram end is connected to the signal processing circuit by the thirteenth resistor, and the other end of the 14th resistance is grounded.
14. control device according to any one of claim 1 to 13, which is characterized in that the control device further includes：
4th switch；
The accumulator of the earphone is connected to the biological characteristic detection module of the earphone by the 4th switch, the earphone Signal processing circuit is used to control the on or off of the 4th switch.
15. control device according to claim 14, which is characterized in that the control device further includes：
Second low pressure difference linear voltage regulator LDO；
The accumulator is connected with one end of the 2nd LDO, the other end of the 2nd LDO by the 5th capacitance connection to ground, The other end of 2nd LDO is also connected to the biological characteristic detection module by the 4th switch.
16. control device according to claim 15, which is characterized in that the control device further includes：
6th capacitance；
The other end of 2nd LDO passes through the 6th capacitance connection to ground.
17. a kind of wired earphone, which is characterized in that including：
Control device described in any one of claim 1 to 16.
18. wired earphone according to claim 17, which is characterized in that the control device is set to the wired earphone Line traffic control plate in.
19. the wired earphone according to claim 17 or 18, which is characterized in that the wired earphone further includes：
Biological characteristic display module；
The signal processing circuit of the earphone is connected with the biological characteristic display module, and the biological characteristic display module is used for Show the testing result of the biological characteristic detection module of the earphone.
CN201880000750.5A 2018-04-12 2018-04-12 Earphone control device and wired earphone Active CN108521873B (en)

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