CN201142743Y - Headphone interface circuit and mobile phone with the same - Google Patents
Headphone interface circuit and mobile phone with the same Download PDFInfo
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- CN201142743Y CN201142743Y CNU2007201583008U CN200720158300U CN201142743Y CN 201142743 Y CN201142743 Y CN 201142743Y CN U2007201583008 U CNU2007201583008 U CN U2007201583008U CN 200720158300 U CN200720158300 U CN 200720158300U CN 201142743 Y CN201142743 Y CN 201142743Y
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Abstract
The utility model discloses an earphone interface circuit, which comprises an earphone jack circuit with the diameter of 3.5mm. The earphone jack circuit comprises a grounding spring lamination, a left soundtrack spring lamination, a right soundtrack spring lamination, a microphone spring lamination and a detection spring lamination, wherein, the grounding spring lamination, the left soundtrack spring lamination and the right soundtrack lamination contact corresponding connection points of an earphone plug when the earphone plug is plugged in; the microphone spring lamination and the detection spring lamination contact the grounding connection point of the earphone plug when a three-channel earphone is plugged in, and contact the microphone connection point of the earphone plug when a four-channel earphone is plugged in; the other end of the detection spring lamination is connected with the input port of a processor; a voltage pull-up circuit branch is connected on a circuit connected with the microphone spring lamination. The utility model further discloses a mobile phone with the earphone interface circuit, so that the mobile phone is compatible with earphones provided with plugs in 3.5mm diameter and has the function of detecting the type of earphone plugged in.
Description
Technical field
The utility model belongs to the mobile communication terminal technical field, specifically, relates to the compatibility design of a kind of mobile phone to the receiver J-Horner of 3.5mm diameter.
Background technology
The development of mobile technology is maked rapid progress, and people also grow with each passing day to its dependence.Honeycomb mobile communication equipment had both brought use flexible to the user, had brought great riches to people again.The effect of earphone jack is on the mobile phone: when inserting earphone, the audio input device of mobile phone switches to the microphone on the earphone, simultaneously, is subjected to words equipment to switch to earphone on the earphone.The design of earphone jack circuit should have two kinds of recognition functions: 1, earphone inserts and detects: whether have earphone insert, so that system carries out the switching of voice pathway if detecting; 2, earphone keystroke detects: whether the button that detects on the earphone is pressed, so that the processing that system answers and hangs up the telephone.Earphone jack commonly used in the middle of the present mobile phone has following several: 1, diameter is the earphone jack of 2.5mm; 2,5pin type mini USB interface; 3, the earphone jack of pin pin connector such as 10/12/14/18; 4, other special-purpose earphone jacks.But, used audio interface is generally the earphone jack of 3.5mm diameter on MP3 and the PC, and triple channel earphone, four-way earphone a lot of and that 3.5mm diameter earphone jack is used are also arranged on the market, and this just causes these situations that has price advantage, widely used earphone to use on mobile phone.
The utility model content
The utility model is in order to solve the problem that existing mobile phone can't the compatible 3.5mm of use diameter plug earphone, a kind of earphone interface circuit is provided, under the prerequisite that guarantees mobile phone audio function and quality, make the earphone that mobile phone can compatible 3.5mm diameter plug, and can the headset type that insert be detected, make the use of mobile phone more convenient.
For solving the problems of the technologies described above, the utility model is achieved by the following technical solutions:
A kind of earphone interface circuit comprises the earphone jack circuit of 3.5mm diameter including five spring leafs in described earphone jack circuit, is defined as ground spring sheet, L channel spring leaf, R channel spring leaf, microphone spring leaf and detection springs sheet respectively; Wherein, described ground spring sheet, L channel spring leaf and R channel spring leaf when headset plug inserts respectively with corresponding contact of corresponding contact of plug; Described microphone spring leaf and detection springs sheet contact with the ground contact of headset plug when inserting the triple channel earphone, and contact with the microphone contact of headset plug when inserting the four-way earphone; The input port of the other end connection processing device of described detection springs sheet; With circuit that described microphone spring leaf is connected on be connected with on the voltage and draw branch road.
Based on above-mentioned earphone interface circuit structure, the utility model has proposed a kind of mobile phone with described earphone interface circuit again simultaneously, disposes the earphone jack of 3.5mm diameter on described mobile phone, and its inside is provided with connected earphone jack circuit.Wherein, the structure of described earphone jack circuit is same as above.Like this, can to detect the earphone of current insertion be triple channel earphone or four-way earphone to the high-low level state that receives according to the described input port of processor; And then determine that whether enabling microphone send the words function.
For convenience of the processing that cell phone system is answered and hung up the telephone, the earphone that plugs with described earphone jack circuit is provided with key switch, an end ground connection, and the other end connects the microphone contact of headset plug; In the earphone jack circuit, with circuit that described microphone spring leaf is connected on be connected with the earphone keystroke testing circuit, comprise a switching circuit; The control end of described switching circuit is connected on the connection line of described microphone spring leaf on the one hand, connect on the other hand on the described voltage and draw branch road, the second road input port of the output connection processing device of described switching circuit, according to its on off operating mode to described processor output low level or high level signal.Like this, described processor can judge whether to carry out the operation of answering or hang up the telephone according to the level signal height state that receives.
Specifically, include a NPN type triode in described switching circuit, its base stage connects on the described voltage draws branch road, grounded emitter, collector electrode connects on the one hand on the described voltage and draws branch road, connects the second road input port of described processor on the other hand.
Wherein, it is existing that described the second road input port can adopt wherein one road GPIO cause for gossip of processor.Draw route to flow power supply on the described voltage always or be in series by a direct current power supply and resistance.
Further, described DC power supply is the direct voltage by linear pressurizer output, described linear pressurizer output-controlled in described processor, when processor detects the earphone that is inserted in the earphone jack and is the triple channel earphone, control described linear pressurizer and stop output, to reduce kwh loss.
Compared with prior art, advantage of the present utility model and good effect are: earphone interface circuit of the present utility model makes earphone interface circuit possess the function that the headset type that inserts is detected by the microphone spring leaf in the 3.5mm diameter earphone jack circuit and the syndeton of detection springs sheet are carried out particular design.Described earphone interface circuit is applied on the mobile phone, not only can make the earphone of handset compatibility 3.5mm diameter plug, but also can be according to detection to headset type, that instructs handset-selected connection mobile phone Mike send that words function or earphone Mike's send the words function, thereby make the use of mobile phone more convenient, and increased the selectable range of Cellphone Accessories.
After reading the detailed description of the utility model execution mode in conjunction with the accompanying drawings, other characteristics of the present utility model and advantage will become clearer.
Description of drawings
Fig. 1 is the plug construction schematic diagram of three-channel 3.5mm diameter earphone;
Fig. 2 is the plug construction schematic diagram of the 3.5mm diameter earphone of four-way;
Fig. 3 is the earphone interface circuit schematic diagram that the utility model proposes.
Embodiment
Below in conjunction with accompanying drawing embodiment of the present utility model is described in detail.
The plug of existing 3.5mm diameter earphone generally is divided into three joints, each saves contact and is defined as L channel contact REC_L, R channel contact REC_R and ground contact GND from outside to inside successively, its structural representation transmits left channel audio signal and right channel audio signal referring to shown in Figure 1.Because it comprises three contacts, therefore, claims that usually this earphone is the triple channel earphone.
Three-channel 3.5mm diameter earphone is owing to only have L channel contact REC_L, R channel contact REC_R and ground contact GND, therefore, can only simply transmit the left and right sound channels audio signal, do not have microphone and send the words function, be applied to can well satisfy on the audio output apparatus such as television set, PC, MP3 output requirement to audio signal, still, for mobile phone products, owing to do not have the words of sending function, and make that the use of mobile phone is very inconvenient.
In order to address the above problem, a kind of 3.5mm diameter earphone of four-way arises at the historic moment, and its plug construction is referring to shown in Figure 2.The ground contact GND of existing 3.5mm diameter headset plug is divided into front and back two joints, thereby forms four joint contacts, each saves contact and is defined as L channel contact REC_L, R channel contact REC_R, microphone contact MIC and ground contact GND from outside to inside successively.And the earphone jack circuit structure that is mated use is referring to shown in Figure 3, and wherein, CN2001 is an earphone jack, comprises 5 spring leafs, and the 1st spring leaf is the ground spring sheet, when earphone inserts, contacts its other end ground connection with the ground contact GND of headset plug; The 2nd spring leaf is the L channel spring leaf, when earphone inserts, contacts with the L channel contact REC_L of headset plug, is used for to earphone speaker transmission left channel audio signal; The 3rd spring leaf is the R channel spring leaf, when earphone inserts, contacts with the R channel contact REC_R of headset plug, is used for to earphone speaker transmission right channel audio signal; The 4th spring leaf is the microphone spring leaf, when earphone inserts, contact with the microphone contact MIC of headset plug, its other end connects the speech processing circuit of mobile phone inside, receive user speech by the microphone that is provided with on the earphone, and the processing that the speech processing circuit that transfers to mobile phone inside carries out voice signal transmits, so realize 3.5mm diameter earphone send the words function; The 5th spring leaf is the detection springs sheet, when earphone inserts, contacts with the microphone contact MIC of headset plug, and its other end connects wherein one road input port of mobile phone internal processor, is used for the headset type that inserts is detected.
Because 3.5mm diameter earphone shown in Figure 2 has four joint contacts, therefore, claims that this earphone is the four-way earphone.Like this, by the circuit of reasonable disposition mobile phone inside, just can also can use the 3.5mm diameter earphone of the four-way of band microphone so that circuit shown in Figure 3 both can use the three-channel 3.5mm diameter earphone of not being with microphone.
Among Fig. 3, GPIO01, GPIO02 represent two GPIO ports of mobile phone internal processor respectively, certainly, also can adopt other two input ports of processor to realize that the utility model is not limited thereto.Wherein, GPIO01 connects the 5th spring leaf, is used to transmit the headset type detection signal; GPIO02 connects key press detecting circuit, is used for the triggering state that is arranged on the key switch on the earphone is detected, and operates to instruct cell phone system accurately to carry out to answer with on-hook.
System GPIO01 be set to import and non-on draw non-drop-down pattern, GPIO02 is set to import and drop-down state.VLDO represents the direct voltage of the linear pressurizer LDO output of cell phone system mesolow difference, is connected on the voice signal transmission line that is connected with microphone spring leaf (i.e. the 4th spring leaf) on the one hand, connects described key press detecting circuit on the other hand.Described LDO is arranged on the state that mobile phone power-on promptly has output, and this function can be connected with the control port of LDO by the output port with processor, utilizes the high-low level signal of processor output to realize the whether control of output voltage to LDO.Draw branch road on the described VLDO formation voltage, certainly, also can adopt other controllable direct current power supply that described VLDO is provided, perhaps be made up of the resistance of VLDO and series connection with it and draw branch road on the voltage, the utility model is not limited thereto.
In described key press detecting circuit, comprise a NPN type triode Q1, its base stage is connected on the voice signal transmission line that is connected with microphone spring leaf (i.e. the 4th spring leaf) on the one hand by divider resistance R1, connect VLDO by divider resistance R2 on the other hand, and by filter capacitor C1 ground connection; The grounded emitter of described NPN type triode Q1; Collector electrode connects VLDO by resistance R 3 on the one hand, connects the GPIO02 port of described processor on the other hand, and by filter capacitor C2 ground connection.Certainly, described key press detecting circuit also can adopt other switch element with on-off action or switching circuit to realize, impracticable novel this is not specifically limited.
The 2nd spring leaf and the 3rd spring leaf are connected the audio frequency processing circuit of mobile phone inside respectively with coupling capacitance C3/C4 by the inductance L 2/L1 of series connection with it, the left and right acoustic channels audio signal transmission that will receive by mobile phone is answered for the cellphone subscriber to the left and right sides headset of earphone.
Below in conjunction with earphone jack circuit shown in Figure 3, specifically set forth the operation principle of the earphone interface circuit that the utility model proposed.
When inserting without any earphone, GPIO01 is in and draws non-pull-down state on non-, and GPIO02 is in low-potential state L.When earphone shown in Figure 1 (below be defined as earphone A) inserted, 1,4,5 spring leafs of earphone jack linked together, so, the state of GPIO01 is L, and system thinks and inserted earphone A, the output of system closing LDO afterwards, the magnitude of voltage that is VLDO is 0, so that save power consumption.And when earphone shown in Figure 2 (below be defined as earphone B) inserted, 4,5 spring leafs of earphone jack linked together, because LDO opens at this moment, promptly the magnitude of voltage of VLDO be high, so GPIO01 is in high potential state H, earphone B insertion is thought by system.
Earphone B is provided with key switch, an end ground connection, and the other end connects the microphone contact MIC of headset plug.When key switch is not pressed, the high voltage VLDO control triode Q1 conducting of LDO output, thus make GPIO02 be in the L state; When button is pressed, be equivalent to the 4th spring leaf shorted to earth in the earphone jack, triode Q1 ends, thereby make GPIO02 be in the H state at this moment, the difference that this state has been arranged, system just can judge later on whether the button on the earphone is pressed at insertion earphone B, and then the action of carrying out telephone receiving or hanging up.
When following table was the earphone insertion, GPIO01 port and GPIO02 port be pairing high low-potential state table under different situations:
| State | GPIO01 | GPIO02 |
| Insert earphone A | L | L |
| Insert earphone B, and key switch is not pressed | H | L |
| Insert earphone B, and key switch is pressed | H | H |
By adopting above-mentioned earphone interface circuit structure, not only can make the earphone of handset compatibility 3.5mm diameter plug, and can utilize four-way earphone after the improvement to finish and give words and dislodging machine function, increased the selectable range of Cellphone Accessories, made things convenient for the daily use of mobile phone.
Certainly, above-mentioned earphone interface circuit structure also can be applicable in other audio processing equipment except that mobile phone.
Should be noted that; the above only is a kind of preferred implementation of the present utility model; for those skilled in the art; under the prerequisite that does not break away from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection range of the present utility model.
Claims (10)
1, a kind of earphone interface circuit, it is characterized in that: the earphone jack circuit that comprises the 3.5mm diameter, in described earphone jack circuit, include five spring leafs, be defined as ground spring sheet, L channel spring leaf, R channel spring leaf, microphone spring leaf and detection springs sheet respectively; Wherein, described ground spring sheet, L channel spring leaf and R channel spring leaf when headset plug inserts respectively with corresponding contact of corresponding contact of plug; Described microphone spring leaf and detection springs sheet contact with the ground contact of headset plug when inserting the triple channel earphone, and contact with the microphone contact of headset plug when inserting the four-way earphone; The input port of the other end connection processing device of described detection springs sheet; With circuit that described microphone spring leaf is connected on be connected with on the voltage and draw branch road.
2, earphone interface circuit according to claim 1 is characterized in that: the earphone that plugs with described earphone jack circuit is provided with key switch, an end ground connection, and the other end connects the microphone contact of headset plug; In the earphone jack circuit, with circuit that described microphone spring leaf is connected on be connected with the earphone keystroke testing circuit, comprise a switching circuit; The control end of described switching circuit is connected on the connection line of described microphone spring leaf on the one hand, connect on the other hand on the described voltage and draw branch road, the second road input port of the output connection processing device of described switching circuit, according to its on off operating mode to described processor output low level or high level signal.
3, earphone interface circuit according to claim 2, it is characterized in that: in described switching circuit, include a NPN type triode, its base stage connects on the described voltage draws branch road, grounded emitter, collector electrode connects on the one hand on the described voltage and draws branch road, connects the second road input port of described processor on the other hand.
4, according to claim 1 or 2 or 3 described earphone interface circuits, it is characterized in that: draw route to flow power supply on the described voltage always or be in series by a direct current power supply and resistance.
5, earphone interface circuit according to claim 4 is characterized in that: described DC power supply is the direct voltage by the output of linear pressurizer, described linear pressurizer output-controlled in described processor.
6, a kind of mobile phone with earphone interface circuit, it is characterized in that: the earphone jack circuit that comprises the 3.5mm diameter, in described earphone jack circuit, include five spring leafs, be defined as ground spring sheet, L channel spring leaf, R channel spring leaf, microphone spring leaf and detection springs sheet respectively; Wherein, described ground spring sheet, L channel spring leaf and R channel spring leaf when headset plug inserts respectively with corresponding contact of corresponding contact of plug; Described microphone spring leaf and detection springs sheet contact with the ground contact of headset plug when inserting the triple channel earphone, and contact with the microphone contact of headset plug when inserting the four-way earphone; The input port of the other end connection processing device of described detection springs sheet; With circuit that described microphone spring leaf is connected on be connected with on the voltage and draw branch road.
7, mobile phone according to claim 6 is characterized in that: the earphone that plugs with described earphone jack circuit is provided with key switch, an end ground connection, and the other end connects the microphone contact of headset plug; In the earphone jack circuit, with circuit that described microphone spring leaf is connected on be connected with the earphone keystroke testing circuit, comprise a switching circuit; The control end of described switching circuit is connected on the connection line of described microphone spring leaf on the one hand, connect on the other hand on the described voltage and draw branch road, the second road input port of the output connection processing device of described switching circuit, according to its on off operating mode to described processor output low level or high level signal.
8, mobile phone according to claim 7, it is characterized in that: in described switching circuit, include a NPN type triode, its base stage connects on the described voltage draws branch road, grounded emitter, collector electrode connects on the one hand on the described voltage and draws branch road, connects the second road input port of described processor on the other hand.
9, according to claim 6 or 7 or 8 described mobile phones, it is characterized in that: draw route to flow power supply on the described voltage always or be in series by a direct current power supply and resistance.
10, mobile phone according to claim 9 is characterized in that: described DC power supply is the direct voltage by the output of linear pressurizer, described linear pressurizer output-controlled in described processor.
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| Application Number | Priority Date | Filing Date | Title |
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| CNU2007201583008U CN201142743Y (en) | 2007-12-08 | 2007-12-08 | Headphone interface circuit and mobile phone with the same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201583008U CN201142743Y (en) | 2007-12-08 | 2007-12-08 | Headphone interface circuit and mobile phone with the same |
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Cited By (12)
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| CN101783986A (en) * | 2010-03-17 | 2010-07-21 | 青岛海信移动通信技术股份有限公司 | Earphone interface circuit and electronic equipment |
| CN101917659A (en) * | 2010-07-23 | 2010-12-15 | 惠州Tcl移动通信有限公司 | Detection device, method and mobile terminal of earphone circuit |
| CN102104823A (en) * | 2011-02-11 | 2011-06-22 | 惠州Tcl移动通信有限公司 | Earphone key detection device, method and mobile terminal |
| WO2011079720A1 (en) * | 2009-12-30 | 2011-07-07 | 华为终端有限公司 | Wired earphone compatible method and device |
| CN102457793A (en) * | 2010-11-02 | 2012-05-16 | 深圳富泰宏精密工业有限公司 | Earphone interface circuit and electronic device provided with the same |
| CN102544953A (en) * | 2011-12-06 | 2012-07-04 | 深圳市文鼎创数据科技有限公司 | Self-adaptive audio frequency switching device and method |
| CN102752690A (en) * | 2012-07-17 | 2012-10-24 | 上海摩软通讯技术有限公司 | Electronic device and earphone |
| CN102946138A (en) * | 2012-10-15 | 2013-02-27 | 东莞华贝电子科技有限公司 | Power supply switching device |
| CN103096210A (en) * | 2011-11-04 | 2013-05-08 | 纬创资通股份有限公司 | Signal connection module, electronic device and connector identification method |
| CN103369420A (en) * | 2012-03-30 | 2013-10-23 | 三星电子株式会社 | Apparatus and method for interfacing earphone |
| CN102143262B (en) * | 2010-02-03 | 2014-03-26 | 深圳富泰宏精密工业有限公司 | Electronic device and method for switching audio input channel thereof |
| CN105610012A (en) * | 2015-12-24 | 2016-05-25 | 努比亚技术有限公司 | External equipment power supply device and method |
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| WO2011079720A1 (en) * | 2009-12-30 | 2011-07-07 | 华为终端有限公司 | Wired earphone compatible method and device |
| CN102143262B (en) * | 2010-02-03 | 2014-03-26 | 深圳富泰宏精密工业有限公司 | Electronic device and method for switching audio input channel thereof |
| CN101783986A (en) * | 2010-03-17 | 2010-07-21 | 青岛海信移动通信技术股份有限公司 | Earphone interface circuit and electronic equipment |
| CN101783986B (en) * | 2010-03-17 | 2013-02-20 | 青岛海信移动通信技术股份有限公司 | Earphone interface circuit and electronic equipment |
| CN101917659A (en) * | 2010-07-23 | 2010-12-15 | 惠州Tcl移动通信有限公司 | Detection device, method and mobile terminal of earphone circuit |
| CN102457793A (en) * | 2010-11-02 | 2012-05-16 | 深圳富泰宏精密工业有限公司 | Earphone interface circuit and electronic device provided with the same |
| CN102457793B (en) * | 2010-11-02 | 2016-01-13 | 深圳富泰宏精密工业有限公司 | Earphone interface circuit and there is the electronic installation of this earphone interface circuit |
| CN102104823A (en) * | 2011-02-11 | 2011-06-22 | 惠州Tcl移动通信有限公司 | Earphone key detection device, method and mobile terminal |
| US9326068B2 (en) | 2011-11-04 | 2016-04-26 | Wistron Corporation | Signal connecting module, electronic device, and connector identification method thereof |
| CN103096210B (en) * | 2011-11-04 | 2016-04-13 | 纬创资通股份有限公司 | Signal connection module, electronic device and connector identification method |
| CN103096210A (en) * | 2011-11-04 | 2013-05-08 | 纬创资通股份有限公司 | Signal connection module, electronic device and connector identification method |
| CN102544953A (en) * | 2011-12-06 | 2012-07-04 | 深圳市文鼎创数据科技有限公司 | Self-adaptive audio frequency switching device and method |
| CN102544953B (en) * | 2011-12-06 | 2014-07-30 | 深圳市文鼎创数据科技有限公司 | Self-adaptive audio frequency switching device and method |
| US9179233B2 (en) | 2012-03-30 | 2015-11-03 | Samsung Electronics Co., Ltd. | Apparatus and method for interfacing earphone |
| CN103369420A (en) * | 2012-03-30 | 2013-10-23 | 三星电子株式会社 | Apparatus and method for interfacing earphone |
| CN103369420B (en) * | 2012-03-30 | 2017-03-01 | 三星电子株式会社 | Apparatus and method for earphone docking |
| CN102752690A (en) * | 2012-07-17 | 2012-10-24 | 上海摩软通讯技术有限公司 | Electronic device and earphone |
| CN102752690B (en) * | 2012-07-17 | 2016-05-04 | 上海摩软通讯技术有限公司 | Electronic equipment and earphone |
| CN102946138B (en) * | 2012-10-15 | 2014-10-22 | 东莞华贝电子科技有限公司 | Power supply switching device |
| CN102946138A (en) * | 2012-10-15 | 2013-02-27 | 东莞华贝电子科技有限公司 | Power supply switching device |
| CN105610012A (en) * | 2015-12-24 | 2016-05-25 | 努比亚技术有限公司 | External equipment power supply device and method |
| CN105610012B (en) * | 2015-12-24 | 2019-05-10 | 努比亚技术有限公司 | External equipment power supply unit and method |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081029 Termination date: 20101208 |