CN104284274B - The audio component of electronic device and the application electronic device - Google Patents
The audio component of electronic device and the application electronic device Download PDFInfo
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- CN104284274B CN104284274B CN201310292603.9A CN201310292603A CN104284274B CN 104284274 B CN104284274 B CN 104284274B CN 201310292603 A CN201310292603 A CN 201310292603A CN 104284274 B CN104284274 B CN 104284274B
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Abstract
The present invention provides a kind of electronic device, it includes master chip, receiver J-Horner and circuit board, the master chip and receiver J-Horner setting are on circuit boards, and integrated circuit modules are formed by circuit board wiring, the receiver J-Horner includes the first grounding pin, and the receiver J-Horner further includes the second grounding pin, and first grounding pin is as FM antenna, second grounding pin provides ground connection for earphone, and second grounding pin and master chip are connected to same with reference on the ground.The present invention also provides a kind of audio components.Electronic device of the invention inside earphone by being arranged two independent first grounding pins and the second grounding pin.Since the first grounding pin is separately as antenna, thus the influence of earphone home loop electric current is eliminated, improves the sensitivity that FM antenna receives wireless signal, noise filter circuit can be also saved in circuit design.
Description
Technical field
The present invention relates to a kind of electronic devices, more particularly to one kind can eliminate the electronic device of earphone noise and apply the electricity
The audio component of sub-device.
Background technique
Traditional electronic devices generally comprise master chip and earphone, and a grounding pin is typically provided on earphone, with for microphone,
L channel and right channel provide system earth, meanwhile, the grounding pin is again usually as day frequency modulation broadcasting (FM) of electronic device
Line.Since microphone, L channel and right channel and FM share same grounding pin, it can interfere with each other, cause in use
It is certain to influence.On the one hand, noise is formed in audio signal to prevent FM signal from sealing in, need additionally to increase filter circuit, separately
On the one hand, it is influenced by the loop current of microphone, L channel and right channel, the sensitivity that FM antenna receives signal can be reduced.Together
When, since the ground connection reference point of master chip is different from earphone ground connection reference point, it will cause the electricity of fluctuation between earphone antero-posterior pathway
Signal, to form earphone noise.
Referring to Fig. 1, for a conventional earphone socket 10 and one be plugged in the receiver J-Horner 10 conventional earphone plug 20.It should
Receiver J-Horner 10 includes microphone pin 11, the first grounding pin 12, detecting pin 13, right channel pin 14 and left channel pin
15.The earphone antenna of first grounding pin 12 as FM, while it being used as microphone pin 11, right channel pin 14 and left sound again
The reference ground of road pin 15.The detecting pin 13 is for judging whether headset plug 20 is inserted into receiver J-Horner 10.The earphone is inserted
First 20 include first segment 21, second segment 22, third section 23 and the 4th section 24.When headset plug 20 is inserted into receiver J-Horner 10,
First segment 21 is connect with microphone pin 11, and second segment 22 is connect with the first grounding pin 12, third section 23 and right channel pin
14 connections, the 4th section 24 connect with left channel pin 15 and detecting pin 13.
Referring to Fig. 2, showing the circuit diagram of traditional electronic devices 100, which can be mobile phone, plate electricity
Brain etc. has the electronic device of ear-phone function.The electronic device 100 includes master chip 30, noise filter circuit 50 and receiver J-Horner
10.Above-mentioned master chip 30, noise filter circuit 50 and the setting of earphone 101 on circuit boards, and pass through circuit board wiring (PCB
LAYOUT integrated circuit modules) are formed.A point, B point, C point, D point and E point are the difference being distributed on circuit board ground plane in figure
Point, wherein A point is the reference ground of power amplifier；B point is the reference ground of earphone signal, is located at the first grounding pin 12
Near；C point is the reference ground of master chip 30, is located near master chip 30；D point is power cathode, is all current reflux
Terminal, A point, B point and C point respectively with reference to ground connect eventually by circuit board upward wiring with D point；E point is the first ground connection of earphone
Pin 12 is connected to B point by noise filter circuit 50, which is low-pass filter circuit, to prevent
Frequency modulation broadcasting (FM) signal enters with reference to ground B point, generates noise.
Since the wiring on circuit board is not pure conducting medium, electric current is by having a constant impedance between each reference ground.
In the present embodiment, the wiring impedance between A point and B point is denoted as the first equivalent resistance R1 by we;Wiring between B point and D point
Impedance is denoted as the second equivalent resistance R2；Wiring impedance between A point and C point is denoted as third equivalent resistance R3;Between C point and D point
Wiring impedance be denoted as the 4th equivalent resistance R4.Wherein, we set A point voltage as V, then earphone signal is with reference to ground B point voltage V
(t) _ B=V*R2/ (R1+R2), reference ground C point voltage V (t) _ C=V*R4/ (R3+R4) of master chip 30.From the foregoing, it will be observed that due to
For circuit board wiring itself there are a constant impedance, B point and C point are not reference ground ideally, and have certain voltage.Work as audio
Signal exports from master chip 30 and passes through conventional earphone 101, and the audio signal flowed through in conventional earphone 101 passes through the first grounding lead
Foot 12(E point) earphone signal is flowed into reference to ground B point.Due to master chip 30 reference be C point, reference of conventional earphone 101
For B point, when being routed on circuit boards, be difficult to control the first equivalent resistance R1, the second equivalent resistance R2, third equivalent resistance R3 and
The resistance value of 4th equivalent resistance R4, thus V (t) _ B=V (t) _ C can not be made, cause 101 antero-posterior pathway B point of conventional earphone in this way
And C point current potential is different, causing conventional earphone 101, there are pressure differences, and pressure difference, which exists, makes the earpiece of earphone have electric current to flow through, and is converted into sound
Sound signal is exactly the noise that we hear.Simultaneously as microphone pin 11, right channel pin 14 and left channel pin 15 and FM
The first grounding pin 12 is shared, current signal is bound on 15 circuit of microphone pin 11, right channel pin 14 and left channel pin
The received wireless signal of FM antenna can be formed and be interfered.
Summary of the invention
In view of this, it is necessary to provide a kind of electronic device, more particularly to a kind of electronic device that can eliminate earphone noise.
Separately it is necessary to provide a kind of audio components of application electronic device.
A kind of electronic device comprising master chip, receiver J-Horner and circuit board, the master chip and receiver J-Horner setting exist
On circuit board, and integrated circuit modules are formed by circuit board wiring, the receiver J-Horner includes the first grounding pin, the ear
Machine transplanting of rice mouth further includes the second grounding pin, and first grounding pin is mentioned as FM antenna, second grounding pin for earphone
For ground connection, second grounding pin and master chip are connected to same reference on the ground.
A kind of audio component comprising electronic device and headset plug, the headset plug are used for grafting electronic device, institute
Stating electronic device includes master chip, receiver J-Horner and circuit board, and the master chip and receiver J-Horner setting on circuit boards, and are led to
Oversampling circuit plate is routed to form integrated circuit modules, and the receiver J-Horner includes the first grounding pin, and the receiver J-Horner further includes
Second grounding pin, for first grounding pin as FM antenna, second grounding pin provides ground connection for earphone, and described
Two grounding pins and master chip are connected to same with reference on the ground.
Electronic device of the invention is connect by two independent first grounding pins of setting inside receiver J-Horner and second
Ground pin.Since the first grounding pin is separately as antenna, thus the influence of earphone home loop electric current is eliminated, improves FM
Antenna receives the sensitivity of wireless signal, and noise filter circuit can be also saved in circuit design.Meanwhile second grounding lead
Foot provides system earth, and second grounding pin and master chip are connected to same reference on the ground, avoids earphone with reference to ground
Noise signal is generated with master chip ground reference difference.
Detailed description of the invention
Fig. 1 is the schematic diagram of conventional earphone.
Fig. 2 is the circuit diagram of traditional electronic devices.
Fig. 3 is the earphone schematic diagram of better embodiment provided by the invention.
Fig. 4 is the electronic device circuit figure of better embodiment provided by the invention.
Main element symbol description
| Electronic device | 100,100 ' |
| Receiver J-Horner | 10,10 ' |
| Microphone pin | 11,11 ' |
| First grounding pin | 12,12 ' |
| Detect pin | 13,13 ' |
| Right channel pin | 14,14 ' |
| Left channel pin | 15,15 ' |
| Second grounding pin | 16’ |
| Headset plug | 20,20 ' |
| First segment | 21,21 ' |
| Second segment | 22,22 ' |
| Third section | 23,23 ' |
| 4th section | 24,24 ' |
| 5th section | 25’ |
| Master chip | 30,30 ' |
| Noise filter circuit | 50,50 ' |
The present invention that the following detailed description will be further explained with reference to the above drawings.
Specific embodiment
Fig. 3 and 4 is electronic device 100 ' provided by the invention, has a receiver J-Horner 10 ', for supplying a headset plug
20 ' grafting.The receiver J-Horner 10 ' includes microphone pin 11 ', the first grounding pin 12 ', detecting pin 13 ', right channel pin
14 ', left channel pin 15 ' and the second grounding pin 16, the headset plug 20 ' include first segment 21 ', second segment 22 ', third section
23 ', the 4th section 24 ' and the 5th section 25 ', the first segment 21 ', second segment 22 ', the 5th section 25 ', third section 23 ' and the 4th section 24 '
It is sequentially connected.When headset plug 20 ' is inserted into receiver J-Horner 10 ', which connect with first segment 21 ', this first
Grounding pin 12 ' is connect with second segment 22 ', which connect with the 4th section 24 ', and the detecting pin 13 ' is for judging
Whether headset plug 20 ' is inserted into receiver J-Horner 10 ', which connect with third section 23 ', the left channel pin 15 '
It is connect with the 4th section 24 ', which connect with the 5th section 25 '.
Electronic device 100 ' of the invention further includes master chip 30 '.The master chip 30 ' and receiver J-Horner 10 ' are arranged in electricity
On the plate of road, and integrated circuit modules are formed by circuit board wiring.Wherein, A ', B ', C ' and D ' are each on circuit board ground plane
Point, equivalent resistance of the R ' 1 between A ' and B ', equivalent resistance of the R ' 2 between B ' and D ', R ' 3 are equivalent between A ' and C '
Resistance, equivalent resistance of the R ' 4 between C ' and D '.Master chip 30 ' is grounded by this with reference to ground C '.First grounding pin 12 '
As FM antenna.Second grounding pin 16 ' is as microphone pin 11 ', right channel pin 14 ' and left channel pin 15 '
With reference to ground, meanwhile, second grounding pin 16 ' and reference ground C ' point connect.Due to earphone signal with reference to master chip 30 '
It is same point with reference to ground, thus avoids generating voltage difference between earphone antero-posterior pathway, and additionally generates noise signal.
Above-mentioned electronic device 100 ' and headset plug 20 ' collectively constitute audio player module, when needing using electronic device
When 100 ' broadcasting function, headset plug 20 ' need to be only inserted into the receiver J-Horner 10 ' of electronic device 100 '.
Electronic device 100 ' of the invention is drawn by the way that two independent grounding pins, such microphone are arranged inside earphone
Foot 11 ', right channel pin 14 ', left channel pin 15 ' the second grounding pin 16 ' directly with the reference of master chip 30 ' ground C ' point
Connection, without nearby referring to ground B point in receiver J-Horner 10 ' by noise filter circuit 50 described in background technique, in this way
The influence of circuit board wiring impedance is avoided, the approach that noise seals in earphone is eliminated.Simultaneously as the first grounding pin 12 '
Separately as FM antenna, electrical isolation is formed with microphone pin 11 ', right channel pin 14 ' and left channel pin 15 ', thus
The influence for eliminating 15 ' loop current of microphone pin 11 ', right channel pin 14 ' and left channel pin improves FM antenna and connects
The sensitivity for receiving wireless signal, can also save noise filter circuit 50 in circuit design.
Although being illustrated and described to the preferred embodiment of the present invention, those skilled in the art be will appreciate that
It arrives, different variations can be made, these are all without departing from the scope of the present invention.Therefore, it is intended that the invention is not limited to institute's public affairs
That opens makees preferred forms contemplated to realize the present invention.
Claims (6)
1. a kind of electronic device comprising master chip, receiver J-Horner and circuit board, the master chip and receiver J-Horner are arranged in electricity
On the plate of road, and integrated circuit modules are formed by circuit board wiring, the receiver J-Horner includes the first grounding pin, and feature exists
In: the receiver J-Horner further include the second grounding pin, microphone pin, right channel pin and left channel pin, described first
Grounding pin draws as frequency modulation broadcasting antenna, second grounding pin as microphone pin, right channel pin and L channel
The reference ground of foot, second grounding pin provide ground connection for earphone, and second grounding pin is connected to same with master chip
With reference on the ground.
2. electronic device as described in claim 1, it is characterised in that: be set on circuit board to the reference, the reference
Ground provides system earth for master chip and earphone.
3. a kind of audio component comprising electronic device and headset plug, the headset plug are plugged in electronic device, feature
Be: the electronic device is the electronic device of any one of claim 1~2.
4. audio component as claimed in claim 3, it is characterised in that: the earphone further includes headset plug, and the earphone is inserted
Head includes first segment, second segment, the 5th section, third section and the 4th section, the first segment, second segment, the 5th section, third section and the
Four sections are sequentially connected.
5. audio component as claimed in claim 4, it is characterised in that: after headset plug is inserted into receiver J-Horner, described first
Section is connect with microphone pin, and second segment is connect with the first grounding pin, and third section is connect with right channel pin, the 4th section and a left side
Sound channel pin connection.
6. audio component as claimed in claim 4, it is characterised in that: the receiver J-Horner further includes detecting pin, described to detect
Pin is surveyed for judging whether headset plug is inserted into receiver J-Horner, after headset plug is inserted into receiver J-Horner, described 4th section with
Pin connection is detected, described 5th section connect with the second grounding pin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310292603.9A CN104284274B (en) | 2013-07-12 | 2013-07-12 | The audio component of electronic device and the application electronic device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310292603.9A CN104284274B (en) | 2013-07-12 | 2013-07-12 | The audio component of electronic device and the application electronic device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104284274A CN104284274A (en) | 2015-01-14 |
| CN104284274B true CN104284274B (en) | 2018-12-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310292603.9A Expired - Fee Related CN104284274B (en) | 2013-07-12 | 2013-07-12 | The audio component of electronic device and the application electronic device |
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| Country | Link |
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| CN (1) | CN104284274B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205545799U (en) * | 2016-02-01 | 2016-08-31 | 中兴通讯股份有限公司 | Headphone plug , socket, earphone and terminal |
| CN108040140A (en) * | 2017-11-30 | 2018-05-15 | 广东欧珀移动通信有限公司 | Mobile terminal |
| CN112637735B (en) * | 2020-12-08 | 2022-04-26 | 珠海全志科技股份有限公司 | Board-level noise elimination circuit of analog signal and audio output equipment |
| CN113473315B (en) * | 2021-07-31 | 2022-06-28 | 展讯通信（上海）有限公司 | Electronic device capable of improving output performance of earphone |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20060123802A (en) * | 2005-05-30 | 2006-12-05 | 엘지전자 주식회사 | Electric device having a multi jack insert hole |
| CN2875008Y (en) * | 2005-05-12 | 2007-02-28 | 上海环达计算机科技有限公司 | Electromagnetic interference preventing circuit of audio interface |
| CN101312352A (en) * | 2007-05-25 | 2008-11-26 | 深圳市中兴移动通信有限公司 | Common control circuit for audio signal wire and frequency modulation antenna |
| CN101316111A (en) * | 2008-07-23 | 2008-12-03 | 嘉兴闻泰通讯科技有限公司 | Mobile terminal headphone |
| CN101951268A (en) * | 2010-07-23 | 2011-01-19 | 惠州Tcl移动通信有限公司 | Method and device for improving performance of radio antenna |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4904895B2 (en) * | 2006-04-12 | 2012-03-28 | ソニー株式会社 | Antenna device |
-
2013
- 2013-07-12 CN CN201310292603.9A patent/CN104284274B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2875008Y (en) * | 2005-05-12 | 2007-02-28 | 上海环达计算机科技有限公司 | Electromagnetic interference preventing circuit of audio interface |
| KR20060123802A (en) * | 2005-05-30 | 2006-12-05 | 엘지전자 주식회사 | Electric device having a multi jack insert hole |
| CN101312352A (en) * | 2007-05-25 | 2008-11-26 | 深圳市中兴移动通信有限公司 | Common control circuit for audio signal wire and frequency modulation antenna |
| CN101316111A (en) * | 2008-07-23 | 2008-12-03 | 嘉兴闻泰通讯科技有限公司 | Mobile terminal headphone |
| CN101951268A (en) * | 2010-07-23 | 2011-01-19 | 惠州Tcl移动通信有限公司 | Method and device for improving performance of radio antenna |
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| Publication number | Publication date |
|---|---|
| CN104284274A (en) | 2015-01-14 |
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