CN206743487U - A kind of mobile terminal and head circuit - Google Patents
A kind of mobile terminal and head circuit Download PDFInfo
- Publication number
- CN206743487U CN206743487U CN201720155487.XU CN201720155487U CN206743487U CN 206743487 U CN206743487 U CN 206743487U CN 201720155487 U CN201720155487 U CN 201720155487U CN 206743487 U CN206743487 U CN 206743487U
- Authority
- CN
- China
- Prior art keywords
- module
- interface
- modular plug
- head circuit
- electric capacity
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model discloses a kind of mobile terminal and head circuit, is related to technical field of mobile terminals, and head circuit includes：Modular plug；Earthing module, it is connected with modular plug；Loudspeaker module, it is connected between modular plug and earthing module；Microphone module；It is connected with modular plug；Inductor module is connected between microphone module and modular plug；Microphone module is also associated with capacitance module and filtration module.The utility model provides a kind of mobile terminal and head circuit, and 1) by setting capacitance module, improve earphone antistatic property.2) by setting inductor module, more preferable impedance operator can be showed in high frequency.3) by setting filtration module, not only effective audio will not be produced and significantly affected, while and can effectively suppresses harmonic wave, reaching improves anti-interference and distortion purpose.In the case where ensureing earphone electrical characteristic performance, earphone interference free performance is lifted by a relatively large margin, meets test certification demand.
Description
Technical field
Technical field of mobile terminals is the utility model is related to, specifically, is related to a kind of mobile terminal and head circuit.
Background technology
Main accessories of the earphone as handset audio, its audio performance quality directly influence user's impression and electro-acoustic element
Life-span.We are evaluated generally mainly from loudness, sensitivity and distortion etc. for earphone.
Radiosensitivity (Radiated Susceptibility, RS) is an important test item in EMC test certifications
It is secondary, it is to judge its spoke by spatial emission interference signal, then by receiving the acoustical signal of antenna for mobile phone signal and headset earpiece
Penetrate the ability of feeling bad.
In the prior art, though the design of earphone can meet electrical characteristic requirement, seem for authentication test
Deficiency, antistatic (ESD) and interference performance are on the weak side.
Utility model content
In order to solve problem of the prior art, the utility model embodiment provides a kind of mobile terminal and head circuit.
The technical scheme is as follows：
On the one hand, there is provided a kind of head circuit, including：
Modular plug；
Earthing module, it is connected with the modular plug；
Loudspeaker module, it is connected between the modular plug and the earthing module；
Microphone module, it is connected with the modular plug；
Inductor module is connected between the microphone module and the modular plug；
The microphone module is also associated with capacitance module and filtration module.
Alternatively, the modular plug includes first interface and second interface；Wherein, the first interface and the ground connection
Module connects；
The second interface is connected with the microphone module.
Alternatively, the loudspeaker module includes right speaker interface and left speaker interface；The modular plug is also wrapped
Include the 3rd interface and the 4th interface；
First pin of the right speaker interface is connected with the 3rd interface；The second of the right speaker interface is drawn
Pin is connected with the earthing module；
First pin of the left speaker interface is connected with the 4th interface；The second of the left speaker interface is drawn
Pin is connected with the earthing module.
Alternatively, the capacitance module uses transient diode.
Alternatively, the filtration module includes：First electric capacity, the second electric capacity and the 3rd electric capacity；
First electric capacity, the second electric capacity and the 3rd electric capacity are the electric capacity of nF ranks.
Alternatively, the second interface is connected to after the capacitance module is in parallel with the filtration module.
On the other hand, there is provided a kind of mobile terminal, including described head circuit.
The beneficial effect brought of technical scheme that the utility model embodiment provides is：
1) by setting capacitance module, earphone antistatic property is improved.
2) by setting inductor module, more preferable impedance operator can be showed in high frequency.
3) by setting filtration module, not only effective audio will not be produced and significantly affected, while and can effectively suppresses humorous
Ripple, reaching improves anti-interference and distortion purpose.
In the case where ensureing earphone electrical characteristic performance, earphone interference free performance is lifted by a relatively large margin, meets test certification demand.
Above-mentioned the utility model embodiment sequence number is for illustration only, does not represent the quality of embodiment.
Brief description of the drawings
, below will be to needed for embodiment description in order to illustrate more clearly of the technical scheme in the embodiment of the utility model
The accompanying drawing to be used is briefly described, it should be apparent that, drawings in the following description are only some realities of the present utility model
Example is applied, for those of ordinary skill in the art, on the premise of not paying creative work, can also be according to these accompanying drawings
Obtain other accompanying drawings.
Fig. 1 is a kind of module diagram of head circuit of the utility model embodiment；
Fig. 2 is a kind of schematic diagram of head circuit of the utility model embodiment.
Embodiment
It is new to this practicality below in conjunction with accompanying drawing to make the purpose of this utility model, technical scheme and advantage clearer
Type embodiment is described in further detail.
Embodiment one
The utility model provides a kind of head circuit, referring to Fig. 1, including：
Modular plug 100；
Earthing module 300, it is connected with the modular plug 100；
Loudspeaker module 200, it is connected between the modular plug 100 and the earthing module 300；
Microphone module 400, it is connected with the modular plug 100；
Inductor module 410 is connected between the microphone module 400 and the modular plug 100；
The microphone module 400 is also associated with capacitance module 420 and filtration module 430.
Alternatively, the modular plug 100 includes first interface and second interface；Wherein,
The first interface is connected with the earthing module；
The second interface is connected with the microphone module.
Alternatively, the loudspeaker module 200 includes right speaker interface and left speaker interface；The modular plug is also
Including the 3rd interface and the 4th interface；
First pin of the right speaker interface is connected with the 3rd interface；The second of the right speaker interface is drawn
Pin is connected with the earthing module 300；
First pin of the left speaker interface is connected with the 4th interface；The second of the left speaker interface is drawn
Pin is connected with the earthing module 300.
Alternatively, the capacitance module uses transient diode.
Alternatively, the filtration module includes：First electric capacity, the second electric capacity and the 3rd electric capacity；
First electric capacity, the second electric capacity and the 3rd electric capacity are the electric capacity of nF ranks.
Alternatively, the second interface is connected to after the capacitance module is in parallel with the filtration module.
In the present embodiment, a kind of circuit diagram of head circuit is additionally provided, referring to Fig. 2, including：Loudspeaker SPK, microphone
MIC, ground wire GND and plug J1；The microphone MIC is parallel with transient diode T1, electric capacity C1, C2, C3；The Mike
Inductor B1 and resistance R1 is in series between wind MIC and plug J1；The loudspeaker SPK is connected to the plug J1 and ground connection
Between line GND.
Specifically, transient diode T1 (Transient Voltage Suppressor, TVS) lifts earphone antistatic behaviour
Can, while TVS pipe has capacitance characteristic, for example 47pF plays filter action；Inductor B1 uses inductance rather than magnetic resistance herein,
Because magnetic resistance can show preferable impedance operator in high frequency, but tonequality is damaged while DC impedance itself can be led
Volume is caused to diminish.
Alternatively, the plug J1 includes first interface 1 and second interface 2；Wherein, first interface 1 and the ground wire
GND connections；
Second interface 2 is connected with the microphone MIC.
Alternatively, the loudspeaker SPK includes right speaker interface SPK_R and left speaker interface SPK_L；The plug
J1 includes the 3rd interface 3 and the 4th interface 4.
The first pin of the right speaker interface SPK_R is connected with the 3rd interface 3；The right speaker interface SPK_R
Second pin be connected with the ground wire GND；
The first pin of the left speaker interface SPK_L is connected with the 4th interface 4；The left speaker interface SPK_L
Second pin be connected with the ground wire GND.
Alternatively, second interfaces 2 of the transient diode T1 with being connected the plug J1 after electric capacity C1, C2, C3 parallel connection.
Alternatively, described electric capacity C1, C2, C3 are the electric capacity of nF ranks.
Specifically, because audio is concentrated mainly on 20Hz~20KHz frequency ranges, effective speech frequency be 500Hz~
10KHz, it is nF rank electric capacity to select C1C1, C2, C3, and is used as filtering device, not only will not produce obvious shadow to effective audio
Ring, while and can effectively suppresses harmonic wave, reaching improves anti-interference and distortion purpose.
Embodiment two
On the other hand, a kind of mobile terminal that the utility model embodiment provides, the mobile terminal include such as embodiment
Head circuit described in one.
Specifically, mobile terminal can be smart mobile phone, flat board either notebook computer.
The beneficial effect brought of technical scheme that the utility model embodiment provides is：
1) by setting capacitance module, earphone antistatic property is improved.
2) by setting inductor module, more preferable impedance operator can be showed in high frequency.
3) by setting filtration module, not only effective audio will not be produced and significantly affected, while and can effectively suppresses humorous
Ripple, reaching improves anti-interference and distortion purpose.
In the case where ensureing earphone electrical characteristic performance, earphone interference free performance is lifted by a relatively large margin, meets test certification demand.
Preferred embodiment of the present utility model is these are only, it is all in the utility model not to limit the utility model
Spirit and principle within, any modification, equivalent substitution and improvements made etc., should be included in protection model of the present utility model
Within enclosing.
Claims (4)
- A kind of 1. head circuit, it is characterised in that including：Modular plug；Earthing module, it is connected with the modular plug；Loudspeaker module, it is connected between the modular plug and the earthing module；Microphone module；It is connected with the modular plug；Inductor module is connected between the microphone module and the modular plug；The microphone module is also associated with capacitance module and filtration module；The modular plug includes first interface and second interface；Wherein, the first interface is connected with the earthing module；The second interface is connected with the microphone module；The loudspeaker module includes right speaker interface and left speaker interface；The modular plug also include the 3rd interface and 4th interface；First pin of the right speaker interface is connected with the 3rd interface；The second pin of the right speaker interface with The earthing module connection；First pin of the left speaker interface is connected with the 4th interface；The second pin of the left speaker interface with The earthing module connection；The second interface is connected to after the capacitance module is in parallel with the filtration module.
- 2. head circuit as claimed in claim 1, it is characterised in that the capacitance module uses transient diode.
- 3. head circuit as claimed in claim 2, it is characterised in that the filtration module includes：First electric capacity, the second electric capacity And the 3rd electric capacity；First electric capacity, the second electric capacity and the 3rd electric capacity are the electric capacity of nF ranks.
- 4. a kind of mobile terminal, it is characterised in that including the head circuit as described in claim any one of 1-3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720155487.XU CN206743487U (en) | 2017-09-05 | 2017-09-05 | A kind of mobile terminal and head circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720155487.XU CN206743487U (en) | 2017-09-05 | 2017-09-05 | A kind of mobile terminal and head circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206743487U true CN206743487U (en) | 2017-12-12 |
Family
ID=60557143
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720155487.XU Expired - Fee Related CN206743487U (en) | 2017-09-05 | 2017-09-05 | A kind of mobile terminal and head circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206743487U (en) |
-
2017
- 2017-09-05 CN CN201720155487.XU patent/CN206743487U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171212 Termination date: 20200905 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |