CN104333830A - Antenna circuit and electronic equipment - Google Patents
Antenna circuit and electronic equipment Download PDFInfo
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- CN104333830A CN104333830A CN201410534335.1A CN201410534335A CN104333830A CN 104333830 A CN104333830 A CN 104333830A CN 201410534335 A CN201410534335 A CN 201410534335A CN 104333830 A CN104333830 A CN 104333830A
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- earphone
- antenna
- antenna circuit
- chip
- electronic equipment
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Abstract
The invention relates to an antenna circuit and a piece of electronic equipment, belonging to the field of electronic circuits. The antenna circuit comprises a FM chip and an earphone socket. The FM chip comprises an antenna interface. The earphone socket comprises a microphone terminal. The antenna interface and the microphone terminal are electrically connected. By using a microphone wire of an earphone as the antenna of the FM chip, the problem that antenna signals interfere with sound played in an earphone to reduce the sound quality of the earphone when a ground wire of the earphone is used as the antenna of the FM chip in the related technology is solved. Therefore, antenna signals do not interfere with sound played in the earphone, and the sound quality of the earphone is improved.
Description
Technical field
The disclosure relates to electronic circuit field, particularly a kind of antenna circuit and electronic equipment.
Background technology
Radio function is function common in the electronic equipment of such as smart mobile phone, panel computer and E-book reader and so on.
In these electronic equipments, be usually provided with FM (Frequency Modulation, frequency modulation) chip.FM chip needs to coordinate corresponding antenna normally to work.Length due to antenna needs to be greater than 1/4 of electromagnetic wavelength to be received, and the electromagnetic wavelength that broadcast modulation adopts is longer, and electronic equipment usually all directly cannot be set to FM chip and arrange antenna.In the related, user, when using radio function, needs plugged earphone on an electronic device, and electronic equipment uses the ground wire in earphone to be used as the antenna of FM chip.
Open people is realizing in process of the present disclosure, finds that aforesaid way at least exists following defect:
Because earphone operationally also needs to make property-line, when the antenna of the ground wire in earphone simultaneously as FM chip, aerial signal can produce interference to the sound play in earphone, and the sound quality of earphone is declined.
Summary of the invention
In order to solve in correlation technique the antenna using the ground wire in earphone as FM chip, aerial signal can produce interference to the sound play in earphone, and make the problem that the sound quality of earphone declines, disclosure embodiment provides a kind of antenna circuit and electronic equipment.Described technical scheme is as follows:
According to first aspect of the present disclosure, provide a kind of antenna circuit, this antenna circuit comprises: modulating FM chip and earphone socket;
FM chip includes antennal interface;
Earphone socket includes microphone terminal;
Antennal interface and microphone terminal are electrical connected.
In one embodiment, this antenna circuit also comprises: SPDT switch and audio processing chip;
A moved end in antennal interface and SPDT switch is electrical connected;
Another moved end in microphone input termi-nal in audio processing chip and SPDT switch is electrical connected;
Not moved end in SPDT switch and microphone terminal are electrical connected.
In one embodiment, antennal interface is electrical connected by high-pass filtering circuit and microphone terminal.
In one embodiment, high-pass filtering circuit comprises filter capacitor.
In one embodiment, antenna circuit also comprises: audio processing chip;
Microphone input termi-nal in audio processing chip is electrical connected by low-pass filter circuit and microphone terminal.
In one embodiment, low-pass filter circuit comprises filter inductance.
In one embodiment, earphone socket is the universal standard earphone socket of 2.5 millimeters, 3.5 millimeters or 6.5 millimeters.
According to second aspect of the present disclosure, provide a kind of electronic equipment, this electronic equipment comprises the antenna circuit as first aspect provides.
According to the third aspect of the present disclosure, provide a kind of antenna circuit, this antenna circuit comprises: modulating FM chip and helical antenna;
FM chip includes antennal interface, and antennal interface and helical antenna are electrical connected.
According to fourth aspect of the present disclosure, provide a kind of electronic equipment, this electronic equipment comprises the antenna circuit that the as above third aspect provides.
The technical scheme that disclosure embodiment provides can comprise following beneficial effect:
By utilizing the microphone lines in earphone as the antenna of FM chip; Solve in correlation technique the antenna using the ground wire in earphone as FM chip, aerial signal can produce interference to the sound play in earphone, makes the problem that the sound quality of earphone declines; Reach aerial signal and can not produce interference to the sound play in earphone, thus improve the effect of the sound quality of earphone.
Should be understood that, it is only exemplary and explanatory that above general description and details hereinafter describe, and can not limit the disclosure.
Accompanying drawing explanation
Accompanying drawing to be herein merged in specification and to form the part of this specification, shows and meets embodiment of the present disclosure, and is used from specification one and explains principle of the present disclosure.
Fig. 1 is the circuit diagram of a kind of antenna circuit according to an exemplary embodiment;
Fig. 2 is the circuit diagram of a kind of antenna circuit according to another exemplary embodiment;
Fig. 3 is the circuit diagram of a kind of antenna circuit according to another exemplary embodiment;
Fig. 4 is the structural representation of a kind of electronic equipment according to an exemplary embodiment;
Fig. 5 is the circuit diagram of a kind of antenna circuit according to another exemplary embodiment;
Fig. 6 is the structural representation of a kind of electronic equipment according to another exemplary embodiment.
By above-mentioned accompanying drawing, illustrate the embodiment that the disclosure is clear and definite more detailed description will be had hereinafter.These accompanying drawings and text description be not in order to limited by any mode the disclosure design scope, but by reference to specific embodiment for those skilled in the art illustrate concept of the present disclosure.
Embodiment
Here will be described exemplary embodiment in detail, its sample table shows in the accompanying drawings.When description below relates to accompanying drawing, unless otherwise indicated, the same numbers in different accompanying drawing represents same or analogous key element.Execution mode described in following exemplary embodiment does not represent all execution modes consistent with the disclosure.On the contrary, they only with as in appended claims describe in detail, the example of apparatus and method that aspects more of the present disclosure are consistent.
Fig. 1 is the circuit diagram of a kind of antenna circuit according to an exemplary embodiment.This antenna circuit comprises: FM chip 120 and earphone socket 140.
FM chip 120 includes antennal interface 122.
Earphone socket 140 includes microphone terminal 142.
Antennal interface 122 and microphone terminal 142 are electrical connected.
In sum, the antenna circuit that the present embodiment provides, by utilizing the microphone lines in earphone as the antenna of FM chip; Solve in correlation technique the antenna using the ground wire in earphone as FM chip, aerial signal can produce interference to the sound play in earphone, makes the problem that the sound quality of earphone declines; Reach aerial signal and can not produce interference to the sound play in earphone, thus improve the effect of the sound quality of earphone.
FM chip in above-mentioned antenna circuit operationally, need plugged earphone in earphone socket, use the microphone lines in earphone as the antenna of FM chip, due to when the radio function using FM chip to provide, microphone in earphone is in non operating state usually, so aerial signal can not cause interference to microphone.Even if now microphone is in running order, because user requires higher to the high-fidelity of the sound that earphone is play, and require lower to the high-fidelity of call or recording, so aerial signal is also in the interference of microphone the scope that user can receive.
Fig. 2 is the circuit diagram of a kind of antenna circuit according to another exemplary embodiment.This antenna circuit comprises: FM chip 120, audio processing chip 130, earphone socket 140 and SPDT switch 150.
FM chip 120 includes antennal interface 122.
Audio processing chip 130 includes microphone input termi-nal 132.
Earphone socket 140 is generally the universal standard earphone socket of 2.5 millimeters, 3.5 millimeters or 6.5 millimeters.Earphone socket 140 generally includes four terminals, is respectively ground wire terminal 141, microphone terminal 142, R channel terminal 143 and L channel terminal 144.The difference of the industry standard referenced by earphone socket 140, putting in order of these four terminals may be slightly different.
SPDT switch 150 comprises not moved end 156,152,154 and one, two moved ends.
Antennal interface 122 is electrical connected with a moved end 152 in SPDT switch 150.
Microphone input termi-nal 132 in audio processing chip 130 is electrical connected with another moved end 154 in SPDT switch 150.
Not moved end 156 in SPDT switch 150 is electrical connected with the microphone terminal 142 of earphone socket 140.
When the moved end 152 in SPDT switch 150 is not with when moved end 156 is connected, the antennal interface 122 of FM chip 120 is electrical connected with the microphone terminal 142 of earphone socket 140.
When the moved end 154 in SPDT switch 150 is not with when moved end 156 is connected, the microphone input termi-nal 132 in audio processing chip 130 is electrical connected with the microphone terminal 142 of earphone socket 140.
Alternatively, SPDT switch 150 can also comprise a control end (not shown), this control end is connected with the processor of electronic equipment, when needs use FM chip, this processor sends the first control signal, and moved end 152 is connected with not moved end 156 according to the first control signal by SPDT switch 150; When needs use microphone call or recording, this processor sends the second control signal, and moved end 154 is connected with not moved end 156 according to the second control signal by SPDT switch 150.
In sum, the antenna circuit that the present embodiment provides, by utilizing the microphone lines in earphone as the antenna of FM chip; Solve in correlation technique the antenna using the ground wire in earphone as FM chip, aerial signal can produce interference to the sound play in earphone, makes the problem that the sound quality of earphone declines; Reach aerial signal and can not produce interference to the sound play in earphone, thus improve the effect of the sound quality of earphone.
Owing to using SPDT switch, microphone is optionally connected with audio processing chip with FM chip, decrease the possibility that FM chip and audio processing chip interfere with each other, improve the microphone lines in earphone as the reliability of the antenna of FM chip and applicability.
Fig. 3 is the circuit diagram of a kind of antenna circuit according to another exemplary embodiment.This antenna circuit comprises: FM chip 120, audio processing chip 130, earphone socket 140, high-pass filtering circuit 160 and low-pass filter circuit 170.
FM chip 120 includes antennal interface 122.
Audio processing chip 130 includes microphone input termi-nal 132.
Earphone socket 140 is generally the universal standard earphone socket of 2.5 millimeters, 3.5 millimeters or 6.5 millimeters.Earphone socket 140 generally includes four terminals, is respectively ground wire terminal 141, microphone terminal 142, R channel terminal 143 and L channel terminal 144.The difference of the industry standard referenced by earphone socket 140, putting in order of these four terminals may be slightly different.
Antennal interface 122 is electrical connected by high-pass filtering circuit 160 and microphone terminal 142.Alternatively, high-pass filtering circuit 160 comprises filter capacitor C.
Microphone input termi-nal 132 in audio processing chip 130 is electrical connected by low-pass filter circuit 170 and microphone terminal 142.Alternatively, low-pass filter circuit 170 comprises filter inductance L.
In sum, the antenna circuit that the present embodiment provides, by utilizing the microphone lines in earphone as the antenna of FM chip; Solve in correlation technique the antenna using the ground wire in earphone as FM chip, aerial signal can produce interference to the sound play in earphone, makes the problem that the sound quality of earphone declines; Reach aerial signal and can not produce interference to the sound play in earphone, thus improve the effect of the sound quality of earphone.
Because the frequency range of audio signal is 20-20KHZ, the audio signal on earphone can deaden by high-pass filtering circuit 150, FM chip 120 can not be entered into.Again because the frequency range of FM signal is 87.5MHZ-108MHZ, the FM signal on earphone can be low-pass filtered circuit 160 and deadened, and can not enter into audio processing chip 130.
Fig. 4 is the structural representation of a kind of electronic equipment according to an exemplary embodiment.This electronic equipment 400 comprises the antenna circuit 420 that Fig. 1 or Fig. 2 or Fig. 3 any embodiment provide.
Fig. 5 is the circuit diagram of a kind of antenna circuit according to another exemplary embodiment.This antenna circuit comprises: FM chip 520 and helical antenna 540;
FM chip 520 includes antennal interface 522, and antennal interface 522 and helical antenna 540 are electrical connected.
Helical antenna 540 can be the flat helical antenna be wound around around rectangle, round rectangle or square.
In sum, the antenna circuit that the present embodiment provides, by utilizing helical antenna as the antenna of FM chip; Solve in correlation technique the antenna using the ground wire in earphone as FM chip, aerial signal can produce interference to the sound play in earphone, makes the problem that the sound quality of earphone declines; Reach aerial signal and can not produce interference to the sound play in earphone, thus improve the effect of the sound quality of earphone.
Fig. 6 is the structural representation of a kind of electronic equipment according to another exemplary embodiment.This electronic equipment 600 comprises the antenna circuit 620 that Fig. 5 embodiment provides.Helical antenna in this antenna circuit 600 can be fitted the inner surface of the bonnet being arranged at electronic equipment 600.
Those skilled in the art, at consideration specification and after putting into practice invention disclosed herein, will easily expect other embodiment of the present disclosure.The application is intended to contain any modification of the present disclosure, purposes or adaptations, and these modification, purposes or adaptations are followed general principle of the present disclosure and comprised the undocumented common practise in the art of the disclosure or conventional techniques means.Specification and embodiment are only regarded as exemplary, and true scope of the present disclosure and spirit are pointed out by claim below.
Should be understood that, the disclosure is not limited to precision architecture described above and illustrated in the accompanying drawings, and can carry out various amendment and change not departing from its scope.The scope of the present disclosure is only limited by appended claim.
Claims (10)
1. an antenna circuit, is characterized in that, described antenna circuit comprises: modulating FM chip and earphone socket;
Described FM chip includes antennal interface;
Described earphone socket includes microphone terminal;
Described antennal interface and described microphone terminal are electrical connected.
2. antenna circuit according to claim 1, is characterized in that, described antenna circuit also comprises: SPDT switch and audio processing chip;
A moved end in described antennal interface and described SPDT switch is electrical connected;
Another moved end in microphone input termi-nal in described audio processing chip and described SPDT switch is electrical connected;
Not moved end in described SPDT switch and described microphone terminal are electrical connected.
3. antenna circuit according to claim 1, is characterized in that, described antennal interface is electrical connected by high-pass filtering circuit and described microphone terminal.
4. antenna circuit according to claim 3, is characterized in that, described high-pass filtering circuit comprises filter capacitor.
5. antenna circuit according to claim 3, is characterized in that, described antenna circuit also comprises: audio processing chip;
Microphone input termi-nal in described audio processing chip is electrical connected by low-pass filter circuit and described microphone terminal.
6. antenna circuit according to claim 5, is characterized in that, described low-pass filter circuit comprises filter inductance.
7., according to the arbitrary described antenna circuit of claim 1 to 6, it is characterized in that, described earphone socket is the universal standard earphone socket of 2.5 millimeters, 3.5 millimeters or 6.5 millimeters.
8. an electronic equipment, is characterized in that, described electronic equipment comprise as arbitrary in claim 1 to 7 as described in antenna circuit.
9. an antenna circuit, is characterized in that, described antenna circuit comprises: modulating FM chip and helical antenna;
Described FM chip includes antennal interface, and described antennal interface and described helical antenna are electrical connected.
10. an electronic equipment, is characterized in that, described electronic equipment comprises antenna circuit as claimed in claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410534335.1A CN104333830A (en) | 2014-10-11 | 2014-10-11 | Antenna circuit and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410534335.1A CN104333830A (en) | 2014-10-11 | 2014-10-11 | Antenna circuit and electronic equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104333830A true CN104333830A (en) | 2015-02-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410534335.1A Pending CN104333830A (en) | 2014-10-11 | 2014-10-11 | Antenna circuit and electronic equipment |
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| Country | Link |
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| CN (1) | CN104333830A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105099424A (en) * | 2015-06-12 | 2015-11-25 | 联想(北京)有限公司 | Electronic equipment and information processing method |
| CN107528937A (en) * | 2017-07-24 | 2017-12-29 | 捷开通讯(深圳)有限公司 | A kind of mobile communication equipment and its antenna |
| WO2018166271A1 (en) * | 2017-03-17 | 2018-09-20 | 中兴通讯股份有限公司 | Fm earphone jack circuit, audio terminal and control method therefor |
| CN113676572A (en) * | 2021-08-04 | 2021-11-19 | 维沃移动通信有限公司 | Interface circuit and electronic device |
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| CN201444651U (en) * | 2009-07-31 | 2010-04-28 | 沈阳晨讯希姆通科技有限公司 | Dual-headphone adapter and corresponding main board thereof |
| CN201550105U (en) * | 2009-11-19 | 2010-08-11 | 华为终端有限公司 | Terminal and system using power line as wireless receiving antenna |
| CN103297887A (en) * | 2012-02-29 | 2013-09-11 | 宏达国际电子股份有限公司 | Headset, circuit structure of mobile apparatus, and the mobile apparatus |
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| US20070259684A1 (en) * | 2004-02-06 | 2007-11-08 | Sanyo Electric Co., Ltd. | Mobile Telephone Unit with Broadcast Receiving Function |
| CN101188431A (en) * | 2006-11-17 | 2008-05-28 | 光宝科技股份有限公司 | Receiving device for frequency modulation broadcast system |
| CN201444651U (en) * | 2009-07-31 | 2010-04-28 | 沈阳晨讯希姆通科技有限公司 | Dual-headphone adapter and corresponding main board thereof |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105099424A (en) * | 2015-06-12 | 2015-11-25 | 联想(北京)有限公司 | Electronic equipment and information processing method |
| WO2018166271A1 (en) * | 2017-03-17 | 2018-09-20 | 中兴通讯股份有限公司 | Fm earphone jack circuit, audio terminal and control method therefor |
| CN108632696A (en) * | 2017-03-17 | 2018-10-09 | 中兴通讯股份有限公司 | A kind of FM earphone bases circuit, voice frequency terminal and its control method |
| CN108632696B (en) * | 2017-03-17 | 2021-01-26 | 中兴通讯股份有限公司 | FM earphone seat circuit, audio terminal and control method thereof |
| CN107528937A (en) * | 2017-07-24 | 2017-12-29 | 捷开通讯(深圳)有限公司 | A kind of mobile communication equipment and its antenna |
| CN107528937B (en) * | 2017-07-24 | 2020-05-19 | 捷开通讯(深圳)有限公司 | Mobile communication equipment and antenna thereof |
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| CN113676572A (en) * | 2021-08-04 | 2021-11-19 | 维沃移动通信有限公司 | Interface circuit and electronic device |
| CN113676572B (en) * | 2021-08-04 | 2024-03-01 | 维沃移动通信有限公司 | Interface circuit and electronic device |
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Application publication date: 20150204 |