CN101521699A - Mobile phone receiving frequency modulated signal by using built-in aerial and method thereof - Google Patents
Mobile phone receiving frequency modulated signal by using built-in aerial and method thereof Download PDFInfo
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- CN101521699A CN101521699A CN200910130011A CN200910130011A CN101521699A CN 101521699 A CN101521699 A CN 101521699A CN 200910130011 A CN200910130011 A CN 200910130011A CN 200910130011 A CN200910130011 A CN 200910130011A CN 101521699 A CN101521699 A CN 101521699A
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Abstract
The invention relates to a mobile phone receiving frequency modulated signal by using a built-in aerial and a method thereof. The mobile phone comprises a frequency modulated (FM) built-in aerial, a matching circuit and an FM demodulated module which are connected in sequence, an audio selected switch connected with the FM demodulated module, a loudspeaker and an earphone connector, wherein the FM built-in aerial transfers a received FM signal which is matched by impedance of the matching circuit when enabling FM signal receiving function of the mobile phone to the FM demodulated module; the loudspeaker and the earphone connector are respectively connected with the audio selected switch, and the earphone connector is used for plugging a common earphone; the FM demodulated module outputs an FM demodulated signal to the audio selected switch after demodulating an input FM signal; and the audio selected switch selectively outputs the FM demodulated signal to the earphone or the loudspeaker under the control of the mobile phone. The invention satisfies the demands of users for listening to FM programs with different ways.
Description
Technical field
The present invention relates to listen to the mobile phone of frequency modulation(FM) (FM, Frequency Modulation) signal, relate in particular to mobile phone and method thereof with the built-in aerial receiving frequency modulated signal.
Background technology
At present, receive the FM signal and become one of function of mobile phone indispensability.
At common on the market FM mobile phone generally all is as antenna with earphone cord.After the earphone that has antenna function was pulled out, the situation of FM signal can appear listening to.This be because the FM antenna frequencies at 88MHz～108MHz, in theory, the FM antenna should have long electrical length 75cm (1/4 wavelength), if the FM antenna length is reduced to make its degradation, just so earphone cord be taken as reception antenna.Mobile phone is being listened to the FM music in such cases or is being listened to other program of FM and must use earphone, and just in case the user is not with earphone, software detection is less than the existence of earphone antenna, and the FM receiving function of mobile phone can't use so, and is just very inconvenient concerning the user like this.And use earphone antenna to receive FM signal demand Duola's single line on common headphones, cost is increased, also can cause earphone not general, or other holding wire transmits the FM signal in the sharing earphone, this way brings noise can for FM signal or holding wire, it also will add device as filtering and match circuit on mainboard, cost is further increased, and design difficulty is strengthened.
Along with the lifting of consumer entertainment requirement, can adopt common headphones to listen to the FM program, perhaps can adopt loud speaker to put the FM program outward and just become urgent.Along with the development of antenna technology, this imagination comes true.The outer FM of the putting mobile phone that occurs on the market adopts exactly and add the FM built-in aerial in casing at present, and this kind FM built-in aerial can be metal radiant body or short dielectric antenna.Receive the FM signal with the FM built-in aerial, though still can receive finely when not having earphone to insert, for avoiding influencing other people, earphone is listened to function and must must be possessed again in some occasion.Perhaps, playing function outside under the situation that earphone leaves behind, needing to possess by loud speaker.So just produced mobile phone not only can answer the FM program of radio station but also can emit the requirement of FM program of radio station by loud speaker outward with earphone.
And the FM demodulation chip that existing mobile phone products uses has only an input port usually, as shown in Figure 1, realize that the FM program of above-mentioned dual mode listens to if use the earphone of the above-mentioned FM of having receiving function, often need increase radio-frequency (RF) switch at FM demodulation front end, being used for selecting is to receive the FM signal by the FM built-in aerial, still receives the FM signal by earphone antenna.Like this,, on the one hand cost is further increased, and can introduce differential loss and cause the useful signal strength reduction, and noise factor is increased greatly, thereby make entire system FM receptivity become bad owing to use radio-frequency (RF) switch.
Therefore, need be improved existing technology, make mobile phone products can either use common headphones to listen to the FM program, also can use loud speaker to put the FM program outward, thereby under the prerequisite that reduces product cost and raising audibility, satisfy user's the different demands of listening to the FM program.
Summary of the invention
Technical problem to be solved by this invention provides a kind of mobile phone and method thereof with the built-in aerial receiving frequency modulated signal, can either use common headphones to listen to the FM program, also can use loud speaker to put the FM program outward, thereby under the prerequisite that reduces product cost, satisfy the different demands that the user listens to the FM program.
In order to solve the problems of the technologies described above, the invention provides a kind of mobile device with the built-in aerial receiving frequency modulated signal, comprise the frequency modulation(FM) FM built-in aerial, match circuit and the FM demodulation module that connect successively; When the FM built-in aerial enables at the FM of mobile device signal receiving function,, be transferred to the FM demodulation module with the impedance matching of the FM signal that receives by match circuit; In addition, mobile device also comprises an audio selected switch that is connected with the FM demodulation module, and the loud speaker and the headset connector that are connected respectively with this audio selected switch; Wherein:
Headset connector, being used to peg graft does not have the earphone that receives the FM semiotic function;
The FM demodulation module, be used for to the input the FM signal carry out demodulation after, export the FM restituted signal to audio selected switch;
Audio selected switch is used at least under the control of mobile device, selects to export the FM restituted signal to earphone by headset connector, or selects to export the FM restituted signal to loud speaker.
Further,
Audio selected switch, when mobile device detected headset connector insertion earphone, controlled selection exported the FM restituted signal to earphone at least; Otherwise controlled selection exports the FM restituted signal to loud speaker.
Further,
Audio selected switch, when mobile device detected user by selecting menu or options button selection earphone listening mode, controlled selection exported the FM restituted signal to earphone at least; Otherwise when mobile device detected user by selecting menu or options button selection loud speaker listening mode, controlled selection exported the FM restituted signal to loud speaker.
Further,
Audio selected switch, when mobile device detected headset connector insertion earphone and user by selecting menu or options button selection earphone listening mode, controlled selection exported the FM restituted signal to earphone; Otherwise controlled selection exports the FM restituted signal to loud speaker.
Further, between headset connector and audio selected switch, also be connected with a communication circuit module;
Communication circuit module also is connected with the FM demodulation module, is used for when receiving signal of communication, stops the demodulation of FM demodulation module to the FM signal, and after signal of communication carried out demodulation, exports audio selected switch to;
Audio selected switch also is used under the control of mobile device, and the selection restituted signal of will communicating by letter exports earphone to by headset connector, or the restituted signal of selecting to communicate by letter exports loud speaker to.
Further,
Audio selected switch is subjected to the control of mobile device, detects at mobile device and inserts earphone on the headset connector, and/or detect the user by selecting menu or select the strong earphone listening mode of selecting, and the controlled selection restituted signal of will communicating by letter exports earphone to; Otherwise the controlled selection restituted signal of will communicating by letter exports loud speaker to.
In order to solve the problems of the technologies described above, the invention provides a kind of method of in mobile phone, using the built-in aerial receiving frequency modulated signal, relate to mobile phone interior frequency modulation(FM) FM built-in aerial, audio selected switch, loud speaker and a headset connector of the earphone of the nothing reception FM semiotic function that is used to peg graft, this method comprises:
At mobile phone power-on and when the FM signal receiving function is enabled, mobile phone carries out demodulation with the FM signal that the FM built-in aerial receives, and the control audio selector switch, the FM restituted signal is selected to export earphone to by headset connector play, or select to export to loudspeaker plays.
Further,
When mobile phone inserted earphone on detecting headset connector, perhaps, when detecting the user by selecting menu or select to be good for selection earphone listening mode, the control audio selector switch was selected to export the FM restituted signal to earphone; Otherwise the control audio selector switch is selected to export described FM restituted signal to loud speaker.
Further,
Mobile phone inserts on detecting headset connector when earphone and user by selecting menu or selection are strong selects the earphone listening mode, and the control audio selector switch is selected to export the FM restituted signal to earphone; Otherwise the control audio selector switch is selected to export the FM restituted signal to loud speaker.
Further,
Mobile phone is when receiving signal of communication, stop the FM signal is carried out demodulation, and signal of communication carried out demodulation, insert earphone on the headset connector if detect, and/or detect the user by selecting menu or select strongly when selecting the earphone listening mode, the control audio selector switch restituted signal of selecting to communicate by letter exports earphone to; If detect when not inserting earphone on the headset connector, or detect the user by selecting menu or select strongly when selecting the loud speaker listening mode, the control audio selector switch restituted signal of selecting to communicate by letter exports loud speaker to.
The present invention is owing to combine common headphones with loud speaker, only adopt the FM built-in aerial to receive the FM signal at FM demodulation front end, increase audio selected switch in FM demodulation rear end, cell phone system according to whether being inserted with earphone on the headset connector being controlled this audio selected switch and is selected to listen to the FM program with earphone and still put the FM program outward with loud speaker, thereby has satisfied the demand that the user listens to the FM program in different ways and receives calls according to the needs of different occasions.And the present invention has been owing to saved the radio-frequency (RF) switch and the match circuit of FM demodulation front end costliness, thereby farthest reduced cost.Have, because the present invention adopts common headphones to listen to the FM signal, obviously this can increase the versatility of terminal, makes the user under the situation that the earphone of oneself is lost again, and uses others' earphone and also can listen to the FM signal, also provides convenience for user's use undoubtedly.
Description of drawings
Fig. 1 combines the FM built-in aerial part hardware configuration schematic diagram that receives the FM signal respectively with earphone antenna in the existing mobile phone;
Fig. 2 is a hardware block diagram of using the mobile device of built-in aerial receiving frequency modulated signal of the present invention;
Fig. 3 is the present invention's method embodiment flow chart with the built-in aerial receiving frequency modulated signal in mobile phone.
Embodiment
Mobile phone and method thereof with the built-in aerial receiving frequency modulated signal provided by the invention, its inventive concept is, mobile phone combines common headphones with loud speaker, only adopt the FM built-in aerial to receive the FM signal at FM demodulation front end, and in audio selected switch of FM demodulation rear end employing, mobile phone is according to the listening mode of choice menus that whether is inserted with earphone and/or mobile phone on the headset connector or options button selection, controlling this audio selected switch selects the FM restituted signal is exported to the earphone broadcast or exports loudspeaker plays to, satisfy the user listens to the FM program according to the needs corresponding manner of different occasions demand with this, simultaneously, save product cost greatly.
Below in conjunction with accompanying drawing and preferred embodiment above-mentioned design of the present invention is at length launched, thereby clearly set forth out technical scheme of the present invention.
As shown in Figure 2, structured flowchart for the mobile device with the built-in aerial receiving frequency modulated signal provided by the invention (being cell phone mainboard), cell phone mainboard 101 comprises FM built-in aerial 102, match circuit 103, FM demodulation module 104, audio selected switch 105, the loud speaker 106 that connects successively, also comprises headset connector 108 and the communication circuit module 109 in order to the grafting common headphones 107 that connect successively; Wherein:
FM built-in aerial 102 is used for the FM signal that receives is exported to match circuit 103;
This FM built-in aerial 102 adopts metal radiant body or dielectric material to make.
Match circuit 103, the impedance that is used to mate FM built-in aerial 102 and FM demodulation module 104 is transferred to FM demodulation module 104 with the FM signal of importing;
FM demodulation module 104 is used for the FM signal of input is carried out demodulation, and exports the FM restituted signal to audio selected switch 105;
Audio selected switch 105 also is connected with headset connector 108, is used for the control according to cell phone mainboard, selects to export the FM restituted signal to loud speaker 106, still exports common headphones 107 to by headset connector 108;
The control of cell phone mainboard can be taked one of following mode:
(1) cell phone mainboard is according to the detection signal that is plugged with earphone 107 on the headset connector 108, and control is selected to export the FM restituted signal to common headphones 107, otherwise control is selected to export the FM restituted signal to loud speaker 106;
(2) cell phone mainboard is selected the earphone listening mode according to choice menus on the mobile phone or the strong (not shown) of selection, and control is selected to export the FM restituted signal to common headphones 107; Otherwise, the strong loud speaker listening mode of selecting of choice menus or selection, control is selected to export the FM restituted signal to loud speaker 106;
(3) cell phone mainboard is plugged with the insertion detection signal of earphone 107 according to headset connector 108, and the choice menus on the mobile phone or select the strong earphone listening mode of selecting, and control is selected to export the FM restituted signal to common headphones 107; Otherwise promptly according to the do not peg graft detection signal of earphone 107 of headset connector 108, or according to the choice menus on the mobile phone or select the strong loud speaker listening mode of selecting, control is selected to export the FM restituted signal to loud speaker 106;
(4) cell phone mainboard is controlled in advance the FM restituted signal is exported to common headphones 107 or exports loud speaker 106 to, carries out the adjustment of listening mode then again according to user's requirement.For example, cell phone mainboard is controlled in advance and is exported the FM restituted signal to common headphones 107, and then cell phone mainboard detects the user and takes off earphone from headset connector, then adjusts to export the FM restituted signal to loud speaker 106; Vice versa.For example cell phone mainboard is controlled in advance and is exported the FM restituted signal to loud speaker 106 again, and then cell phone mainboard detects the user by selecting menu or selects the strong earphone listening mode of selecting, and adjusts and exports the FM restituted signal to common headphones 107.
Loud speaker 106 is used for the FM restituted signal of input is amplified the back broadcast;
Headset connector 108 is used for the signal whether common headphones 107 is inserted is exported to cell phone mainboard, and selects the FM restituted signal of output to be transferred to common headphones 107 audio selected switch 105 and play;
Here, the common headphones 107 of pegging graft on the headset connector 108 does not have the function as the antenna that receives the FM signal.
Communication circuit module 109, be connected with audio selected switch 105 with FM demodulation module 104 respectively, be used for when receiving signal of communication, stop 104 pairs of FM signals of FM demodulation module and carry out demodulation, and after the signal of communication that receives carried out demodulation, export audio selected switch 105 to.
At this moment, the audio selected switch 105 among Fig. 2 is used for the control according to cell phone mainboard, and the selection restituted signal of will communicating by letter exports loud speaker 106 to, still exports common headphones 107 to; Correspondingly, loud speaker 106 and common headphones 107 all are used for the communication restituted signal of input is play.
One of embodiment of the present invention's method of usefulness built-in aerial receiving frequency modulated signal in mobile phone comprises the steps: as shown in Figure 3
S1: open (enabling) FM signal receiving function;
Enable the FM signal receiving function, for example realize, or realize by the shortcut of a broadcast receiver icon in the mobile phone menu by a function of radio receiver key on the mobile phone.
S2: detect earphone and whether be inserted on the headset connector,, carry out S4 if not if carry out S3;
S3: detect and whether select the earphone listening mode to listen to the FM program,, carry out S4 if not if carry out S5;
The user is by the choice menus on the mobile phone or select the strong earphone listening mode of selecting to use, or selects the loud speaker listening mode.
S4: after the FM signal demodulation with the reception of FM built-in aerial, export the FM restituted signal to loudspeaker plays; Process ends;
S5: after the FM signal demodulation with the reception of FM built-in aerial, export the FM restituted signal to earphone and play; Process ends.
The output of the control FM restituted signal of cell phone mainboard, except the mode of taking present embodiment, the alternate manner of having addressed before can also taking does not repeat them here.
When mobile phone receives signal of communication, can stop demodulation output, and the signal of communication demodulation is exported the FM signal.Insert earphone on the headset connector detecting, and detect choice menus or select strongly when selecting the earphone listening mode, the restituted signal of will communicating by letter exports earphone to; And do not insert earphone on the headset connector detecting, or detect choice menus or select strongly when selecting the loud speaker listening mode, the restituted signal of will communicating by letter exports loudspeaker plays to.
In sum as can be seen, the present invention is owing to combine common headphones with loud speaker, adopt the FM built-in aerial to receive the FM signal at FM demodulation front end, increase an inexpensive audio selected switch in FM demodulation rear end, whether cell phone system inserts this audio selected switch of control according to earphone, selection is to listen to the FM program or put the FM program outward with loud speaker with earphone, thereby has satisfied the demand that the user listens to the FM program in different ways and receives calls according to the needs of different occasions.And the present invention has been because of having saved the components and parts and the circuit of FM demodulation front end costliness, thereby reduces effectively and receive noise factor, improved signal receiving quality and reduced product cost.Have, because the present invention adopts common headphones to listen to the FM signal, obviously this can increase the versatility of terminal again, and the convenience of using is provided for the user.
Certainly; the present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.
Claims (10)
1, a kind of mobile device with the built-in aerial receiving frequency modulated signal comprises the frequency modulation(FM) FM built-in aerial, match circuit and the FM demodulation module that connect successively; When described FM built-in aerial enables at the FM of described mobile device signal receiving function,, be transferred to described FM demodulation module with the impedance matching of the FM signal that receives by described match circuit; It is characterized in that described mobile device also comprises an audio selected switch that is connected with described FM demodulation module, and the loud speaker and the headset connector that are connected respectively with this audio selected switch; Wherein:
Described headset connector, being used to peg graft does not have the earphone that receives the FM semiotic function;
Described FM demodulation module, be used for to the input described FM signal carry out demodulation after, export the FM restituted signal to described audio selected switch;
Described audio selected switch is used at least under the control of described mobile device, selects to export described FM restituted signal to described earphone by described headset connector, or selects to export described FM restituted signal to described loud speaker.
2, according to the described mobile device of claim 1, it is characterized in that,
Described audio selected switch, when described mobile device detected described headset connector and inserts described earphone, controlled selection exported described FM restituted signal to described earphone at least; Otherwise controlled selection exports described FM restituted signal to described loud speaker.
3, according to the described mobile device of claim 1, it is characterized in that,
Described audio selected switch, when described mobile device detected user by selecting menu or options button selection earphone listening mode, controlled selection exported described FM restituted signal to described earphone at least; Otherwise when described mobile device detected user by selecting menu or options button selection loud speaker listening mode, controlled selection exported described FM restituted signal to described loud speaker.
4, according to claim 2 or 3 described mobile devices, it is characterized in that,
Described audio selected switch, when described mobile device detected described headset connector and inserts described earphone and user and select the earphone listening mode by described choice menus or options button, controlled selection exported described FM restituted signal to described earphone; Otherwise controlled selection exports described FM restituted signal to described loud speaker.
5, according to each described mobile device of claim 1 to 3, it is characterized in that, between described headset connector and described audio selected switch, also be connected with a communication circuit module;
Described communication circuit module also is connected with described FM demodulation module, is used for when receiving signal of communication, stops the demodulation of described FM demodulation module to described FM signal, and after described signal of communication carried out demodulation, exports described audio selected switch to;
Described audio selected switch also is used under the control of described mobile device, selects to export described communication restituted signal to described earphone by described headset connector, or selects to export described communication restituted signal to described loud speaker.
6, according to the described mobile device of claim 5, it is characterized in that,
Described audio selected switch, be subjected to the control of described mobile device, detect the described earphone of insertion on the described headset connector at described mobile device, and/or detecting the user by described choice menus or the strong earphone listening mode of selecting of selection, controlled selection exports described communication restituted signal to described earphone; Otherwise controlled selection exports described communication restituted signal to described loud speaker.
7, a kind of method of in mobile phone, using the built-in aerial receiving frequency modulated signal, relate to described mobile phone interior frequency modulation(FM) FM built-in aerial, audio selected switch, loud speaker and a headset connector of the earphone of the nothing reception FM semiotic function that is used to peg graft, described method comprises:
At described mobile phone power-on and when the FM signal receiving function is enabled, described mobile phone carries out demodulation with the FM signal that the FM built-in aerial receives, and control described audio selected switch, the FM restituted signal is selected to export described earphone to by described headset connector play, or select to export to described loudspeaker plays.
8, in accordance with the method for claim 7, it is characterized in that,
When described mobile phone inserts described earphone on detecting described headset connector, perhaps, when detecting the user by selecting menu or select to be good for selection earphone listening mode, control described audio selected switch and select to export described FM restituted signal to described earphone; Otherwise, control described audio selected switch and select to export described FM restituted signal to described loud speaker.
9, in accordance with the method for claim 7, it is characterized in that,
Described mobile phone inserts described earphone and user by described choice menus or select strongly when selecting the earphone listening mode on detecting described headset connector, control described audio selected switch and select to export described FM restituted signal to described earphone; Otherwise, control described audio selected switch and select to export described FM restituted signal to described loud speaker.
10, according to each described method of claim 7 to 9, it is characterized in that,
Described mobile phone is when receiving signal of communication, stop described FM signal is carried out demodulation, and described signal of communication carried out demodulation, if detect and insert described earphone on the described headset connector, and/or detect the user by described choice menus or select strongly when selecting the earphone listening mode, control described audio selected switch and select to export described communication restituted signal to described earphone; If detect when not inserting described earphone on the described headset connector, or detect the user by described choice menus or select strongly when selecting the loud speaker listening mode, control described audio selected switch and select to export described communication restituted signal to described loud speaker.
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| CN200910130011A CN101521699A (en) | 2009-03-26 | 2009-03-26 | Mobile phone receiving frequency modulated signal by using built-in aerial and method thereof |
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| CN200910130011A CN101521699A (en) | 2009-03-26 | 2009-03-26 | Mobile phone receiving frequency modulated signal by using built-in aerial and method thereof |
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| CN101867658A (en) * | 2010-06-30 | 2010-10-20 | 深圳市经纬科技有限公司 | Mobile phone and mobile phone built-in antenna dynamic tuning method and device |
| CN102033800A (en) * | 2009-10-08 | 2011-04-27 | 捷讯研究有限公司 | Method for indicating volume of audio sink of portable electronic device |
| CN102340589A (en) * | 2010-07-27 | 2012-02-01 | 上海闻泰电子科技有限公司 | Mobile phone with FM (frequency modulation) multi-channel playback function and FM multi-channel playback method |
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| CN102033800A (en) * | 2009-10-08 | 2011-04-27 | 捷讯研究有限公司 | Method for indicating volume of audio sink of portable electronic device |
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| CN101867658A (en) * | 2010-06-30 | 2010-10-20 | 深圳市经纬科技有限公司 | Mobile phone and mobile phone built-in antenna dynamic tuning method and device |
| CN102340589A (en) * | 2010-07-27 | 2012-02-01 | 上海闻泰电子科技有限公司 | Mobile phone with FM (frequency modulation) multi-channel playback function and FM multi-channel playback method |
| CN102420633A (en) * | 2011-11-29 | 2012-04-18 | 华为终端有限公司 | Mobile terminal |
| CN104980854A (en) * | 2014-04-10 | 2015-10-14 | 恩智浦有限公司 | Smart passive speaker drive |
| CN107360499A (en) * | 2017-08-07 | 2017-11-17 | 歌尔股份有限公司 | Audio output balancing circuitry and earphone |
| CN107360499B (en) * | 2017-08-07 | 2023-04-25 | 歌尔股份有限公司 | Audio output balancing circuit and earphone |
| CN112243066A (en) * | 2020-10-20 | 2021-01-19 | Oppo广东移动通信有限公司 | Method for selecting FM (frequency modulation) playing mode of electronic equipment and electronic equipment |
| CN112243066B (en) * | 2020-10-20 | 2021-07-23 | Oppo广东移动通信有限公司 | Method for selecting FM (frequency modulation) playing mode of electronic equipment and electronic equipment |
| CN117498974A (en) * | 2023-12-28 | 2024-02-02 | 荣耀终端有限公司 | Terminal equipment, peripheral equipment and terminal system |
| CN117498974B (en) * | 2023-12-28 | 2024-05-31 | 荣耀终端有限公司 | Terminal equipment, peripheral equipment and terminal system |
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Application publication date: 20090902 |