CN205179338U - Headphone structure circuit of compatible multiple cell -phone system - Google Patents

Headphone structure circuit of compatible multiple cell -phone system Download PDF

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Publication number
CN205179338U
CN205179338U CN201520916336.2U CN201520916336U CN205179338U CN 205179338 U CN205179338 U CN 205179338U CN 201520916336 U CN201520916336 U CN 201520916336U CN 205179338 U CN205179338 U CN 205179338U
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China
Prior art keywords
pin
earphone
volume
switch
connects
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Expired - Fee Related
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CN201520916336.2U
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Chinese (zh)
Inventor
胡志刚
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Dongguan Soundex Electronic Technology Co Ltd
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Dongguan Soundex Electronic Technology Co Ltd
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Abstract

The utility model discloses a headphone structure circuit of compatible multiple cell -phone system, reduce switch K2, volume increase switch K3 including microprocessor U1, plug, microphone MIC, earphone left side earphone L -earphone, earphone right side earphone R -earphone and broadcast switch K1, volume, microprocessor U1 is last to be set up microphone offset voltage pin MICBIAS, left passageway input pin lin, right passageway input pin lin, left passageway output pin lout, right passageway output pin lout, volume and reduces pin DOWN, volume increase pin UP and ground pin GND. The utility model discloses can compatible ann zhuo, various present cell -phone systems such as iso system, be applicable to the earphone field that the volume need be adjusted to the volume control of drive -by -wire earphone and other, simple structure, with low costs and convenient to use, reduce switch K2 and volume increase switch K3 through broadcast switch K1, volume, and switch microphone and audio playback, convenient and fast through transistor Q1.

Description

A kind of earphone control circuit of compatible multiple mobile phone system
Technical field
The utility model relates to earpiece volume control technology, particularly relates to a kind of earphone control circuit of compatible multiple mobile phone system.
Background technology
From the development of whole audio industry, wireless headset is still new things, and the time of development is not long, still be in the rising stage at present, user's request constantly promotes, and user is also improving the desired value of wireless headset, the new test that Here it is proposes industry.Several main points that current user is concerned about most comprise tonequality, flying power and wireless transmission capability, data, wireless transmission capability substantially can meet the demand of most user, and tonequality and flying power also have very large Improvement, promote if started with from these 2, believe and can be easy to attract user eyeball in future.
Earphone is a pair converting unit, and it accepts the electric signal that media player or receiver send, and utilizes the loud speaker of ear to convert it into the sound wave that can hear.Earphone is generally separable with media player, utilizes a plug to connect.Benefit is when not affecting other people, can listen to sound equipment alone; Also the sound of surrounding environment can be separated, to helpful the people that uses under noisy environment of making an uproar in recording studio, DJ, journey, motion etc.Earphone is former to be used on phone and radio, but prevailing along with portable electronic devices, earphone is used for mobile phone, walkman, broadcast receiver.Portable electronic game sum digit reproducing apparatus for phonotape etc.From the development of whole audio industry, wireless headset is still new things, and development time is not long, is still in the rising stage at present, and user's request constantly promotes, and user is also improving the desired value of wireless headset, the new test that Here it is proposes industry.
Earphone is the symbol of the portable speaker of people.Handset earphone is divided into two kinds of standards: OMTP standard is called GB usually, and CTIA is called as international standard.Earphone is classified according to its transducing mode, mainly contains: moving-coil mode, dynamic iron mode, electrostatic and etc. magnetic-type.Structure, functional mode is classified, and can be divided into semi open model and closed; Then ear type is had, ear suspension type, In-Ear and wear-type from the formal classification of wearing; Classify from the number of wearing, have single earphone and many people earphone; Distinguish from source of sound, active earphone and Passive earphone can be divided into; Active earphone is also often called as card earphone.
Weigh earphone and can evaluate the method for audio amplifier with some, but the sense of hearing of earphone and audio amplifier are different, the sound wave that audio amplifier sends is decayed in atmosphere, is interfered, and interact with the head of people and ear, the sound of earphone directly enters ear.The quality of the sound of earphone is more important than its technical performance, because the shape of the number of people and ear is different, one set of headphones has different senses of hearing to different people, so recommend as a reference, to have an opportunity in person to listen to the sound just really can experiencing earphone.
But the earphone compatible of each brand mobile phone is poor in prior art, when accessing other mobile phone, tonequality is poor, and Consumer's Experience is poor.
Utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art, provides a kind of earphone control circuit of compatible multiple mobile phone system, the various existing cell phone systems such as compatible Android, iso system, applied widely, and structure is simple, and cost is low.
In order to achieve the above object, the technical solution adopted in the utility model is:
An earphone control circuit for compatible multiple mobile phone system,
Comprise microprocessor U1, plug, microphone MIC, earphone left receiver L-earphone, the right receiver R-earphone and playback switch K1 of earphone, volume decrease switches K2, volume up switch K3;
Described microprocessor U1 is arranged microphone bias voltage pin MICBIAS, left passage input pin Lin, right passage input pin Lin, left passage output pin Lout, right passage output pin Lout, the little pin DOWN of volume down, volume increase pin UP and ground pin GND;
Described microphone bias voltage pin MICBIAS connects microphone MIC and playback switch K1 respectively; Described left passage input pin Lin and right passage input pin Lin attachment plug; The little pin DOWN of described volume down connects volume decrease switches K2; Described volume increases pin UP and connects volume up switch K3; The left receiver L-earphone of described left passage output pin Lout frames connecting with headphone; The right receiver R-earphone of described right passage output pin Lout frames connecting with headphone; Described ground pin GND connects earth terminal.
As most preferred embodiment of the present utility model, the output of microphone bias voltage pin MICBIAS described in the utility model arranges a transistor Q1, the grid of transistor Q1 connects microphone bias voltage pin MICBIAS, the source electrode one tunnel ground connection of transistor Q1, another road connects playback switch K1, the drain electrode of transistor Q1 connects one end of microphone MIC, and the drain series one resistance R3 of transistor Q1 connects the other end of microphone MIC.
As most preferred embodiment of the present utility model, transistor Q1 described in the utility model is nmos pass transistor.
As most preferred embodiment of the present utility model, one diode D1 is set between microphone MIC described in the utility model and microphone bias voltage pin MICBIAS, the anode of diode D1 connects microphone MIC, and the negative electrode of diode D1 connects microphone bias voltage pin MICBIAS.
As most preferred embodiment of the present utility model, microphone bias voltage pin MICBIAS described in the utility model connects ground connection after an electric capacity C1.
As most preferred embodiment of the present utility model, plug described in the utility model arranges left passage input pin Lin interface, right passage input pin Lin interface, microphone MIC interface and GND interface; Left passage input pin Lin interface is connected with left passage input pin Lin, and right passage input pin Lin interface is connected with right passage input pin Lin, and microphone MIC interface is connected with microphone MIC, GND interfacing ground.
As most preferred embodiment of the present utility model, ground connection after left passage input pin Lin interface tandem one resistance R1 described in the utility model, ground connection after described right passage input pin Lin interface tandem one resistance R2.
As most preferred embodiment of the present utility model, microprocessor U1 described in the utility model comprises button detection module, count control module, level switch module, decay output module and electric charge pump module; Wherein,
Control signal is exported after button detection module is used for detecting the volume rising signals of key-press input or volume dropping signal;
Count control module is used for reception control signal and exports counter value signal, if control signal is volume up switch K3 presses the volume sent increase control signal, carry out plus coujnt, press if control signal is volume decrease switches K2 the volume minimizing control signal sent, carry out subtraction count;
Level switch module is used for export the counter value signal after conversion after counter value signal switching levels;
Decay output module is used for the counter value signal after the conversion that will receive, the left channel audio signal of input, right channel audio signal after attenuation processing by left passage output pin Lout, right passage output pin Lout output audio signal;
Electric charge pump module for generation of negative supply and export to level switch module and decay output module, make level switch module and decay output module be operated between negative supply to positive supply.
As most preferred embodiment of the present utility model, decay output module described in the utility model comprises 1 to n resistance, 1 to n switch, the (n+1)th to 2n resistance and the (n+1)th to 2n switch; Wherein, one end of 1 to n resistance is all connected with right passage input pin Lin, the other end of 1 to n resistance is connected one by one with 1 to n switch one end respectively, and the other end of 1 to n switch is connected with right passage output pin Lout; One end of the (n+1)th to 2n resistance is all connected with left passage input pin Lin, the other end of the (n+1)th to 2n resistance is connected one by one with the (n+1)th to 2n switch one end respectively, the other end of the (n+1)th to 2n switch is connected with left passage output pin Lout, n be greater than 1 integer.
As most preferred embodiment of the present utility model, electric charge pump module described in the utility model provides negative supply for circuit.
Compared with prior art, the beneficial effects of the utility model are: the first, the various existing cell phone system such as compatible Android, iso system, be applicable to line control earphone volume to control and other need to regulate the earphone field of volume, structure is simple, cost is low and easy to use; The second, by playback switch K1, volume decrease switches K2 and volume up switch K3, and play by transistor Q1 switch microphone and audio frequency, convenient and swift.
Accompanying drawing explanation
Fig. 1 is overall structure schematic diagram of the present utility model;
Fig. 2 is microprocessor internal structural representation of the present utility model.
Embodiment
Purport of the present utility model is to overcome the deficiencies in the prior art, and provide a kind of earphone control circuit of compatible multiple mobile phone system, can adapt to different mobile phones, such as the various existing cell phone system such as compatible Android, iso system, can receive good acoustical quality.Be described in detail, to be interpretated more in-depth technical characteristic of the present utility model and advantage with reference to accompanying drawing below in conjunction with embodiment.
Overall structure schematic diagram of the present utility model as shown in Figure 1, an earphone control circuit for compatible multiple mobile phone system, comprises microprocessor U1, plug, microphone MIC, earphone left receiver L-earphone, the right receiver R-earphone and playback switch K1 of earphone, volume decrease switches K2, volume up switch K3.
Preferably, microprocessor U1 of the present utility model adopts chip ST2618.ST2618 is that its inside includes button detection module, count control module, decay output module, level switch module, electric charge pump module by key control general headrest volume control circuit (maximum attenuation is MUTE).Key-press input will be detected by button detection module, the count value of adjustment count control module controls decay output module and selects different damping resistance values, make the external audio signal being input to decay output module, output to after being attenuated resistance decrement on earphone, achieve the control to earpiece volume.Realize high resistant by decay output module to export, achieve mute function, muting function can be obtained on earphone; Five, built-in electric charge pump module, realizing output audio signal in analog for while 0V, greatly reduces peripheral components.
Circuit detects the input of button UP and DOWN by button detection module, controls internal counter addition or subtraction count, then controls decay output module by count value and selects different damping resistances, realizes the decay of audio signal and outputs on earphone.ST2618 is applicable to line control earphone volume and other need to regulate the earphone field of volume.Built-in charge pump circuit is used to provide negative voltage.UP:UP is used for improving output volume, selects to reduce output resistance by switch.DOWN:DOWN is used for reducing output volume, selects to increase output resistance by switch.The built-in pull-up resistor of UP and DOWN pin, only have button to be exceeded stabilization time 40ms by by dragging down, circuit just can change switch-mode regulation output resistance.When button is continued to drag down, every 200ms adjusts a switch and changes output resistance.ST2618 maximum operating currenbt is lower than 10uA.
As shown in Figure 2, described microprocessor U1 is arranged microphone bias voltage pin MICBIAS, left passage input pin Lin, right passage input pin Lin, left passage output pin Lout, right passage output pin Lout, the little pin DOWN of volume down, volume increase pin UP and ground pin GND.Described microphone bias voltage pin MICBIAS connects microphone MIC and playback switch K1 respectively; Described left passage input pin Lin and right passage input pin Lin attachment plug; The little pin DOWN of described volume down connects volume decrease switches K2; Described volume increases pin UP and connects volume up switch K3; The left receiver L-earphone of described left passage output pin Lout frames connecting with headphone; The right receiver R-earphone of described right passage output pin Lout frames connecting with headphone; Described ground pin GND connects earth terminal.
Preferably, the output of microphone bias voltage pin MICBIAS described in the utility model arranges a transistor Q1, the grid of transistor Q1 connects microphone bias voltage pin MICBIAS, the source electrode one tunnel ground connection of transistor Q1, another road connects playback switch K1, the drain electrode of transistor Q1 connects one end of microphone MIC, and the drain series one resistance R3 of transistor Q1 connects the other end of microphone MIC.
In order to reach good switching over effect, transistor Q1 described in the utility model is nmos pass transistor, VT=1V.Certainly, the utility model is not limited to nmos pass transistor, also can be other transistors.
The utility model is in order to prevent reverse voltage electric current, one diode D1 is set between described microphone MIC and microphone bias voltage pin MICBIAS, the anode of diode D1 connects microphone MIC, and the negative electrode of diode D1 connects microphone bias voltage pin MICBIAS.One diode D1 is set between described microphone MIC and microphone bias voltage pin MICBIAS and forms reverse cut-off circuit, prevent because reverse current causes circuit to damage, improve security performance.
As most preferred embodiment of the present utility model, microphone bias voltage pin MICBIAS described in the utility model connects ground connection after an electric capacity C1, isolates, form protection with ground end.
Plug described in the utility model arranges left passage input pin Lin interface, right passage input pin Lin interface, microphone MIC interface and GND interface; Left passage input pin Lin interface is connected with left passage input pin Lin, and right passage input pin Lin interface is connected with right passage input pin Lin, and microphone MIC interface is connected with microphone MIC, GND interfacing ground.In addition, connect ground connection after a resistance R1 in left another road of passage input pin Lin interface described in the utility model, connects ground connection after a resistance R2 in described right another road of passage input pin Lin interface.
Microprocessor U1 described in the utility model comprises button detection module, count control module, level switch module, decay output module and electric charge pump module; Wherein, button detection module exports control signal after being used for detecting the volume rising signals of key-press input or volume dropping signal; Count control module is used for reception control signal and exports counter value signal, if control signal is volume up switch K3 presses the volume sent increase control signal, carry out plus coujnt, press if control signal is volume decrease switches K2 the volume minimizing control signal sent, carry out subtraction count; Level switch module is used for export the counter value signal after conversion after counter value signal switching levels; Decay output module is used for the counter value signal after the conversion that will receive, the left channel audio signal of input, right channel audio signal after attenuation processing by left passage output pin Lout, right passage output pin Lout output audio signal; Electric charge pump module for generation of negative supply and export to level switch module and decay output module, make level switch module and decay output module be operated between negative supply to positive supply.Electric charge pump module described in the utility model provides negative supply for circuit, simultaneously without the need to extra peripheral components.
As most preferred embodiment of the present utility model, decay output module described in the utility model comprises 1 to n resistance, 1 to n switch, the (n+1)th to 2n resistance and the (n+1)th to 2n switch; Wherein, one end of 1 to n resistance is all connected with right passage input pin Lin, the other end of 1 to n resistance is connected one by one with 1 to n switch one end respectively, and the other end of 1 to n switch is connected with right passage output pin Lout; One end of the (n+1)th to 2n resistance is all connected with left passage input pin Lin, the other end of the (n+1)th to 2n resistance is connected one by one with the (n+1)th to 2n switch one end respectively, the other end of the (n+1)th to 2n switch is connected with left passage output pin Lout, n be greater than 1 integer.Preferably, the value of described n needs to regulate the progression setting of volume according to earphone, and n is the integer of 2 to 99, and as shown in Figure 2, n is 11.
In specific embodiment, described decay output module comprises 1 to n resistance R1, R2, R3 ... Rn, 1 to n K switch 1, K2, K3 ... Kn, the (n+1)th to 2n resistance R(n+1), R (n+2) ... and the (n+1)th to 2n K switch (n+1), K (n+2) R(2n) ... K(2n); Wherein, 1 to n resistance R1, R2, R3 ... one end of Rn is all connected with right passage input pin Lin, 1 to n resistance R1, R2, R3 ... the other end of Rn respectively with 1 to n K switch 1, K2, K3 ... Kn one end connects one by one, 1 to n K switch 1, K2, K3 ... the other end of Kn is connected with right passage output pin Lout; The (n+1)th to 2n resistance R(n+1), R (n+2) ... R(2n) one end is all connected with left passage input pin Lin, the (n+1)th to 2n resistance R(n+1), R (n+2) ... R(2n) the other end respectively with the (n+1)th to 2n K switch (n+1), K (n+2) ... K(2n) one end connects one by one, the (n+1)th to 2n K switch (n+1), K (n+2) ... K(2n) the other end is connected with left passage output pin Lout.
Carry out clear, complete description by the technical scheme in above embodiment to the utility model, obviously described embodiment is the embodiment of the utility model part, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.

Claims (7)

1. an earphone control circuit for compatible multiple mobile phone system, is characterized in that:
Comprise microprocessor U1, plug, microphone MIC, earphone left receiver L-earphone, the right receiver R-earphone and playback switch K1 of earphone, volume decrease switches K2, volume up switch K3;
Described microprocessor U1 is arranged microphone bias voltage pin MICBIAS, left passage input pin Lin, right passage input pin Lin, left passage output pin Lout, right passage output pin Lout, the little pin DOWN of volume down, volume increase pin UP and ground pin GND;
Described microphone bias voltage pin MICBIAS connects microphone MIC and playback switch K1 respectively; Described left passage input pin Lin and right passage input pin Lin attachment plug; The little pin DOWN of described volume down connects volume decrease switches K2; Described volume increases pin UP and connects volume up switch K3; The left receiver L-earphone of described left passage output pin Lout frames connecting with headphone; The right receiver R-earphone of described right passage output pin Lout frames connecting with headphone; Described ground pin GND connects earth terminal.
2. the earphone control circuit of compatible multiple mobile phone system according to claim 1, it is characterized in that: the output of described microphone bias voltage pin MICBIAS arranges a transistor Q1, the grid of transistor Q1 connects microphone bias voltage pin MICBIAS, the source electrode one tunnel ground connection of transistor Q1, another road connects playback switch K1, the drain electrode of transistor Q1 connects one end of microphone MIC, and the drain series one resistance R3 of transistor Q1 connects the other end of microphone MIC.
3. the earphone control circuit of compatible multiple mobile phone system according to claim 2, is characterized in that: described transistor Q1 is nmos pass transistor.
4. the earphone control circuit of compatible multiple mobile phone system according to claim 2, it is characterized in that: a diode D1 is set between described microphone MIC and microphone bias voltage pin MICBIAS, the anode of diode D1 connects microphone MIC, and the negative electrode of diode D1 connects microphone bias voltage pin MICBIAS.
5. the earphone control circuit of compatible multiple mobile phone system according to claim 2, is characterized in that: described microphone bias voltage pin MICBIAS connects ground connection after an electric capacity C1.
6. the earphone control circuit of compatible multiple mobile phone system according to claim 1, is characterized in that: described plug arranges left passage input pin Lin interface, right passage input pin Lin interface, microphone MIC interface and GND interface; Left passage input pin Lin interface is connected with left passage input pin Lin, and right passage input pin Lin interface is connected with right passage input pin Lin, and microphone MIC interface is connected with microphone MIC, GND interfacing ground.
7. the earphone control circuit of compatible multiple mobile phone system according to claim 6, is characterized in that: ground connection after described left passage input pin Lin interface tandem one resistance R1, ground connection after described right passage input pin Lin interface tandem one resistance R2.
CN201520916336.2U 2015-11-17 2015-11-17 Headphone structure circuit of compatible multiple cell -phone system Expired - Fee Related CN205179338U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108495222A (en) * 2018-03-14 2018-09-04 佳禾智能科技股份有限公司 Double compatible line control earphone control circuits and the control method realized based on the circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108495222A (en) * 2018-03-14 2018-09-04 佳禾智能科技股份有限公司 Double compatible line control earphone control circuits and the control method realized based on the circuit

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CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20160420

Termination date: 20161117

CF01 Termination of patent right due to non-payment of annual fee