CN106817644A - A kind of mobile terminal and head circuit - Google Patents
A kind of mobile terminal and head circuit Download PDFInfo
- Publication number
- CN106817644A CN106817644A CN201710092817.XA CN201710092817A CN106817644A CN 106817644 A CN106817644 A CN 106817644A CN 201710092817 A CN201710092817 A CN 201710092817A CN 106817644 A CN106817644 A CN 106817644A
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- CN
- China
- Prior art keywords
- module
- interface
- plug
- earphone
- microphone
- Prior art date
- 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.)
- Pending
Links
- 238000001914 filtration Methods 0.000 claims abstract description 14
- 239000003990 capacitor Substances 0.000 claims description 16
- 230000001052 transient effect Effects 0.000 claims description 6
- 238000010586 diagram Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000001939 inductive effect Effects 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 230000001627 detrimental effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
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- 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
- H04R1/1083—Reduction of ambient noise
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- 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
- H04R1/08—Mouthpieces; Microphones; Attachments therefor
-
- 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
- H04R3/04—Circuits for transducers, loudspeakers or microphones for correcting frequency response
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2460/00—Details of hearing devices, i.e. of ear- or headphones covered by H04R1/10 or H04R5/033 but not provided for in any of their subgroups, or of hearing aids covered by H04R25/00 but not provided for in any of its subgroups
- H04R2460/01—Hearing devices using active noise cancellation
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Headphones And Earphones (AREA)
Abstract
The invention discloses a kind of mobile terminal and head circuit, it is related to technical field of mobile terminals, the head circuit includes：Modular plug；Earthing module, is connected with the modular plug；Loudspeaker module, 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 invention provides a kind of mobile terminal and head circuit, 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 is significantly affected, while can effectively suppress harmonic wave again, reaching improves anti-interference and distortion purpose.In the case where earphone electrical characteristic performance is ensured, earphone interference free performance is lifted by a relatively large margin, meet test certification demand.
Description
Technical Field
The invention relates to the technical field of mobile terminals, in particular to a mobile terminal and an earphone circuit.
Background
The earphone is used as a main accessory of the mobile phone audio, and the user experience and the service life of an electroacoustic device are directly influenced by the quality of the audio performance of the earphone. We generally evaluate headphones mainly in terms of loudness, sensitivity, and distortion.
Radiation Sensitivity (RS) is an important test item in EMC test and certification, and the radiation difficulty capability is determined by emitting an interference signal in space and receiving an antenna signal of a mobile phone and an acoustic signal of an earphone handset.
In the prior art, the design of the earphone can meet the electrical characteristic requirements, but the earphone is insufficient for the certification test, and the antistatic (ESD) and interference capabilities are weak.
Disclosure of Invention
In order to solve the problems in the prior art, embodiments of the present invention provide a mobile terminal and an earphone circuit. The technical scheme is as follows:
in one aspect, a headset circuit is provided, including:
a plug module;
the grounding module is connected with the plug module;
the loudspeaker module is connected between the plug module and the grounding module;
a microphone module connected with the plug module;
an inductance module is connected between the microphone module and the plug module;
the microphone module is also connected with a capacitor module and a filtering module.
Optionally, the plug module comprises a first interface and a second interface; wherein the first interface is connected with the grounding module;
the second interface is connected with the microphone module.
Optionally, the speaker module comprises a right speaker interface and a left speaker interface; the plug module further comprises a third interface and a fourth interface;
the first pin of the right loudspeaker interface is connected with the third interface; the second pin of the right loudspeaker interface is connected with the grounding module;
the first pin of the left loudspeaker interface is connected with the fourth interface; and the second pin of the left loudspeaker interface is connected with the grounding module.
Optionally, the capacitance module employs a transient diode.
Optionally, the filtering module includes: a first capacitor, a second capacitor and a third capacitor;
the first, second and third capacitances are nF scale capacitances.
Optionally, the capacitance module and the filtering module are connected in parallel and then connected to the second interface.
In another aspect, a mobile terminal is provided, which includes the earphone circuit.
The technical scheme provided by the embodiment of the invention has the following beneficial effects:
1) through setting up the electric capacity module, the antistatic performance of earphone has been promoted.
2) By providing an inductive module, better impedance characteristics can be presented at high frequencies.
3) Through setting up the filtering module, not only can not produce obvious influence to effective audio frequency, can effectively restrain the harmonic again simultaneously, reach and improve anti-interference and distortion purpose.
Under the condition of ensuring the electrical characteristic performance of the earphone, the anti-interference performance of the earphone is greatly improved, and the requirement of test authentication is met.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a block diagram of an earphone circuit according to an embodiment of the present invention;
fig. 2 is a schematic diagram of an earphone circuit according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
Example one
The present invention provides an earphone circuit, see fig. 1, comprising:
a plug module 100;
a ground module 300 connected to the header module 100;
a speaker module 200 connected between the plug module 100 and the ground module 300;
a microphone module 400 connected to the plug module 100;
an inductance module 410 is connected between the microphone module 400 and the plug module 100;
the microphone module 400 is further connected with a capacitance module 420 and a filtering module 430.
Optionally, the plug module 100 comprises a first interface and a second interface; wherein,
the first interface is connected with the grounding module;
the second interface is connected with the microphone module.
Optionally, the speaker module 200 comprises a right speaker interface and a left speaker interface; the plug module further comprises a third interface and a fourth interface;
the first pin of the right loudspeaker interface is connected with the third interface; the second pin of the right speaker interface is connected with the grounding module 300;
the first pin of the left loudspeaker interface is connected with the fourth interface; the second pin of the left speaker interface is connected to the grounding module 300.
Optionally, the capacitance module employs a transient diode.
Optionally, the filtering module includes: a first capacitor, a second capacitor and a third capacitor;
the first, second and third capacitances are nF scale capacitances.
Optionally, the capacitance module and the filtering module are connected in parallel and then connected to the second interface.
In this embodiment, a circuit diagram of an earphone circuit is further provided, referring to fig. 2, including: a loudspeaker SPK, a microphone MIC, a grounding wire GND and a plug J1; the microphone MIC is connected with a transient diode T1, a capacitor C1, a capacitor C2 and a capacitor C3 in parallel; an inductor B1 and a resistor R1 are connected in series between the microphone MIC and the plug J1; the speaker SPK is connected between the plug J1 and the ground line GND.
Specifically, a Transient diode T1 (TVS) improves the antistatic performance of the earphone, and at the same time, the TVS tube has a capacitance characteristic, such as 47pF, which plays a role of filtering; inductor B1 here uses inductance rather than reluctance because reluctance may present a better impedance characteristic at high frequencies, but may be detrimental to sound quality while inherently dc impedance may result in a reduction in sound volume.
Optionally, the plug J1 includes a first interface 1 and a second interface 2; the first interface 1 is connected with the ground line GND;
the second interface 2 is connected to the microphone MIC.
Optionally, the speaker SPK includes a right speaker interface SPK _ R and a left speaker interface SPK _ L; the plug J1 includes a third interface 3 and a fourth interface 4.
A first pin of the right speaker interface SPK _ R is connected to the third interface 3; a second pin of the right speaker interface SPK _ R is connected to the ground line GND;
a first pin of the left speaker interface SPK _ L is connected to a fourth interface 4; and a second pin of the left speaker interface SPK _ L is connected to the ground line GND.
Optionally, the transient diode T1 is connected in parallel with the capacitors C1, C2 and C3 and then connected to the second interface 2 of the plug J1.
Optionally, the capacitances C1, C2, C3 are nF-class capacitances.
Specifically, the audio frequency is mainly concentrated in the frequency range of 20 Hz-20 KHz, the effective voice frequency is 500 Hz-10 KHz, C1C1, C2 and C3 are selected as nF-level capacitors and are used as filter devices, so that the effective audio frequency is not obviously influenced, harmonic waves can be effectively inhibited, and the aims of improving interference resistance and distortion are fulfilled.
Example two
In another aspect, an embodiment of the present invention provides a mobile terminal, where the mobile terminal includes the earphone circuit as described in the first embodiment.
In particular, the mobile terminal may be a smartphone, a tablet, or a notebook computer.
The technical scheme provided by the embodiment of the invention has the following beneficial effects:
1) through setting up the electric capacity module, the antistatic performance of earphone has been promoted.
2) By providing an inductive module, better impedance characteristics can be presented at high frequencies.
3) Through setting up the filtering module, not only can not produce obvious influence to effective audio frequency, can effectively restrain the harmonic again simultaneously, reach and improve anti-interference and distortion purpose.
Under the condition of ensuring the electrical characteristic performance of the earphone, the anti-interference performance of the earphone is greatly improved, and the requirement of test authentication is met.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent replacements, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. An earphone circuit, comprising:
a plug module;
the grounding module is connected with the plug module;
the loudspeaker module is connected between the plug module and the grounding module;
a microphone module; is connected with the plug module;
an inductance module is connected between the microphone module and the plug module;
the microphone module is also connected with a capacitor module and a filtering module.
2. The headset circuit of claim 1, wherein the plug module comprises a first interface and a second interface; wherein the first interface is connected with the grounding module;
the second interface is connected with the microphone module.
3. The headset circuit of claim 2, wherein the speaker module comprises a right speaker interface and a left speaker interface; the plug module further comprises a third interface and a fourth interface;
the first pin of the right loudspeaker interface is connected with the third interface; the second pin of the right loudspeaker interface is connected with the grounding module;
the first pin of the left loudspeaker interface is connected with the fourth interface; and the second pin of the left loudspeaker interface is connected with the grounding module.
4. The headset circuit of claim 3, wherein the capacitance module employs a transient diode.
5. The headset circuit of claim 4, wherein the filtering module comprises: a first capacitor, a second capacitor and a third capacitor;
the first, second and third capacitances are nF scale capacitances.
6. The headset circuit of claim 5, wherein the capacitance module is connected to the second interface in parallel with the filtering module.
7. A mobile terminal characterized by comprising an earpiece circuit according to any of claims 1-6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710092817.XA CN106817644A (en) | 2017-02-21 | 2017-02-21 | A kind of mobile terminal and head circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710092817.XA CN106817644A (en) | 2017-02-21 | 2017-02-21 | A kind of mobile terminal and head circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106817644A true CN106817644A (en) | 2017-06-09 |
Family
ID=59112053
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710092817.XA Pending CN106817644A (en) | 2017-02-21 | 2017-02-21 | A kind of mobile terminal and head circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106817644A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108572878A (en) * | 2017-10-09 | 2018-09-25 | 北京视联动力国际信息技术有限公司 | A kind of audio-frequency detection and device |
| CN108632691A (en) * | 2017-10-09 | 2018-10-09 | 北京视联动力国际信息技术有限公司 | A kind of antistatic microphone |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000312253A (en) * | 1999-04-28 | 2000-11-07 | Hitachi Metals Ltd | Earphone cord device with microphone, audible noise suppressing method and phs terminal or cellular telephone terminal |
| CN201207642Y (en) * | 2008-04-23 | 2009-03-11 | 符诗华 | Wireless noise reduction earphone |
| CN201928419U (en) * | 2011-01-21 | 2011-08-10 | 青岛海信移动通信技术股份有限公司 | Earphone and mobile communication terminal provided with same |
| CN203492178U (en) * | 2013-10-21 | 2014-03-19 | 宁波一凯电子有限公司 | In-ear earphone |
| CN104363547A (en) * | 2014-12-04 | 2015-02-18 | 青岛歌尔声学科技有限公司 | Audio processing circuit for eliminating plug-in noise of earphone and line control earphone |
| US20160365082A1 (en) * | 2015-06-15 | 2016-12-15 | Blackberry Limited | Headphones using multiplexed microphone signals to enable active noise cancellation |
-
2017
- 2017-02-21 CN CN201710092817.XA patent/CN106817644A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000312253A (en) * | 1999-04-28 | 2000-11-07 | Hitachi Metals Ltd | Earphone cord device with microphone, audible noise suppressing method and phs terminal or cellular telephone terminal |
| CN201207642Y (en) * | 2008-04-23 | 2009-03-11 | 符诗华 | Wireless noise reduction earphone |
| CN201928419U (en) * | 2011-01-21 | 2011-08-10 | 青岛海信移动通信技术股份有限公司 | Earphone and mobile communication terminal provided with same |
| CN203492178U (en) * | 2013-10-21 | 2014-03-19 | 宁波一凯电子有限公司 | In-ear earphone |
| CN104363547A (en) * | 2014-12-04 | 2015-02-18 | 青岛歌尔声学科技有限公司 | Audio processing circuit for eliminating plug-in noise of earphone and line control earphone |
| US20160365082A1 (en) * | 2015-06-15 | 2016-12-15 | Blackberry Limited | Headphones using multiplexed microphone signals to enable active noise cancellation |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108572878A (en) * | 2017-10-09 | 2018-09-25 | 北京视联动力国际信息技术有限公司 | A kind of audio-frequency detection and device |
| CN108632691A (en) * | 2017-10-09 | 2018-10-09 | 北京视联动力国际信息技术有限公司 | A kind of antistatic microphone |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170609 |