CN2697952Y - Speaker device for vehicle carried mobile telephone set - Google Patents
Speaker device for vehicle carried mobile telephone set Download PDFInfo
- Publication number
- CN2697952Y CN2697952Y CN 200320118027 CN200320118027U CN2697952Y CN 2697952 Y CN2697952 Y CN 2697952Y CN 200320118027 CN200320118027 CN 200320118027 CN 200320118027 U CN200320118027 U CN 200320118027U CN 2697952 Y CN2697952 Y CN 2697952Y
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- China
- Prior art keywords
- mobile phone
- frequency
- free device
- vehicle carried
- carried mobile
- 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.)
- Expired - Fee Related
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Abstract
The utility model relates to a wireless FM frequency modulation receiving and dispatching technology application, in particular to a hand-free device for vehicle carried mobile phone, comprising a mobile phone, an FM frequency modulation emitter and an FM broadcast receiver in the vehicle. The audio signal of an incoming call is received from the earcap of the mobile phone through a microphone, the audio signal is carried out the frequency modulation and emission through the FM frequency modulation emitter, and the FM receiver in the vehicle receives and listens the sound of incoming call. Compared with prior art, the utility model has the advantages that the wireless FM frequency modulation receiving and dispatching technology is applied to the mobile phone hand-free device; the mobile phone hand-free loudspeaking is realized by the FM receiver in the vehicle.
Description
Technical field
The utility model has related to a kind of radio FM frequency modulation transmit-receive technology to be used, and is specially adapted to the mobile phone hands-free device of vehicular.
Background is described
Automobile-used hands-free device, the product of up to the present existing various ways, its groundwork mode is the receiving and transmitting signal that extracts mobile phone by line, reaches hands-free purpose after the amplification.These its advantages of traditional on-vehicle hands-free device are that work is more stable, and acoustical quality is better.But maximum shortcoming is to use complexity, line is many, versatility is poor, and the mobile phone products of different manufacturers needs special-purpose plugs and sockets.Cause and produce complexity, use inconvenience, have a strong impact on the universal use of car handsfree communicator, the traffic accident that causes of phoning with mobile telephone because of driving happens occasionally.
Automobile-used mobile phone hands-free device of the present utility model, deficiency and advantage that traditional vehicle exists with hands-free device have been used for reference, from aspect such as practicality, easy to use, highly versatile, call tone quality be good, use the anti-interference strong and good FM frequency modulation transmit-receive technology of tonequality, utilize FM FM receiver in the automobile to realize the hands-free loud-speaking effect of making a phone call dexterously, thereby make this patent product not need line, need not wear earphone, need not install, be suitable for the hands-free use of all types of mobile phones.
Summary of the invention
The purpose of this utility model is achieved by the following technical solution: the utility model is made up of the FM broadcast receiver in mobile phone, FM frequency-modulated transmitter and the automobile, from the receiver of mobile phone, collect the audio signal of calling by microphone, carry out frequency modulation and emission through the FM frequency-modulated transmitter, the FM broadcast receiver in the automobile is listened to the sound of calling.
The utility model also can extract audio signal from the earphone jack of mobile phone, launch after the modulation of FM frequency-modulated transmitter is amplified, and utilize the FM broadcast receiver in the automobile to listen to the sound of calling.
FM frequency-modulated transmitter described in the utility model is mainly produced and modulation circuit 11 by reference frequency, frequency multiplier circuit 12, and power amplification radiating circuit 13 is formed.Triode N1 and crystal XT form reference frequency and produce and FM circuit, produce the reference frequency of 17.6～18MHZ.Triode N2 after 5 frequencys multiplication and 6 frequencys multiplication, can produce two groups of high-frequency modulation signals to reference frequency in 88～108MHZ frequency range, launched by ring Shape antenna after triode N3 amplifies again.
The utility model compared with prior art has wireless FM frequency modulation transmit-receive technology is used in the mobile phone hands-free device; Use FM broadcast receiver in the automobile to realize the hands-free advantage such as raise one's voice of mobile phone.
Description of drawings
Fig. 1 is circuit theory diagrams of the present utility model.
Specific embodiment
Below in conjunction with description of drawings the utility model is described in further detail: as shown in Figure 1, the main part of this product is the FM frequency-modulated transmitter, it collects the audio signal of calling dexterously by microphone from the receiver of mobile phone, or from the earphone jack of mobile phone, extract audio signal, after amplifying, the modulation of FM frequency-modulated transmitter launches, and utilize the FM broadcast receiver in the automobile to listen to the sound of calling, thereby realize the function of hand-free call.The electric principle of this frequency-modulated transmitter is mainly produced and modulation circuit 11 by reference frequency as shown in Figure 1, frequency multiplier circuit 12, and power amplification radiating circuit 13 is formed.Triode N1 in its electrical schematic diagram 11 and crystal XT form reference frequency and produce and FM circuit, produce the reference frequency of 17.6～18MHZ, triode N2 in the electrical schematic diagram 12 reference frequency after 5 frequencys multiplication and 6 frequencys multiplication, can produce two groups of high-frequency modulation signals in 88～108MHZ frequency range, the triode N3 in electrical schematic diagram 13 is launched by ring Shape antenna after amplifying again.
Claims (5)
1, a kind of vehicle carried mobile phone hands-free device, formed by the FM broadcast receiver in mobile phone, FM frequency-modulated transmitter and the automobile, it is characterized in that from the receiver of mobile phone, collecting the audio signal of calling by microphone, carry out frequency modulation and emission through the FM frequency-modulated transmitter, the FM broadcast receiver in the automobile is listened to the sound of calling.
2, vehicle carried mobile phone hands-free device according to claim 1 is characterized in that extracting audio signal in the earphone jack of described mobile phone, launches after the modulation of FM frequency-modulated transmitter is amplified, and utilizes the FM broadcast receiver in the automobile to listen to the sound of calling.
3, vehicle carried mobile phone hands-free device according to claim 1 and 2 is characterized in that described FM frequency-modulated transmitter is mainly produced and modulation circuit by reference frequency, frequency multiplier circuit, and the power amplification radiating circuit is formed.
4, vehicle carried mobile phone hands-free device according to claim 3 is characterized in that triode N1 and crystal XT form reference frequency and produce and FM circuit, produces the reference frequency of 17.6～18MHZ.
5, vehicle carried mobile phone hands-free device according to claim 4, it is characterized in that triode N2 reference frequency after 5 frequencys multiplication and 6 frequencys multiplication, can in 88～108MHZ frequency range, produce two groups of high-frequency modulation signals, after triode N3 amplifies, launch again by ring Shape antenna.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320118027 CN2697952Y (en) | 2003-11-13 | 2003-11-13 | Speaker device for vehicle carried mobile telephone set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320118027 CN2697952Y (en) | 2003-11-13 | 2003-11-13 | Speaker device for vehicle carried mobile telephone set |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2697952Y true CN2697952Y (en) | 2005-05-04 |
Family
ID=34762357
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200320118027 Expired - Fee Related CN2697952Y (en) | 2003-11-13 | 2003-11-13 | Speaker device for vehicle carried mobile telephone set |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2697952Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101345541A (en) * | 2008-08-29 | 2009-01-14 | 飞图科技（北京）有限公司 | Method for implementing karaoke through broadcasting audio by FM radio used for mobile terminal |
| CN103618582A (en) * | 2013-11-28 | 2014-03-05 | 北京奇虎科技有限公司 | Method and system for acquiring broadcast signal information in vehicle |
| CN106374943A (en) * | 2016-11-16 | 2017-02-01 | 深圳市华讯方舟卫星通信有限公司 | Ka-band transmitter |
-
2003
- 2003-11-13 CN CN 200320118027 patent/CN2697952Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101345541A (en) * | 2008-08-29 | 2009-01-14 | 飞图科技（北京）有限公司 | Method for implementing karaoke through broadcasting audio by FM radio used for mobile terminal |
| CN103618582A (en) * | 2013-11-28 | 2014-03-05 | 北京奇虎科技有限公司 | Method and system for acquiring broadcast signal information in vehicle |
| CN103618582B (en) * | 2013-11-28 | 2017-11-17 | 北京奇虎科技有限公司 | Broadcast signal information acquisition methods and system in vehicle |
| CN106374943A (en) * | 2016-11-16 | 2017-02-01 | 深圳市华讯方舟卫星通信有限公司 | Ka-band transmitter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |