CN2877147Y - Apparatus for converting VF signal into FM signal of cell phone - Google Patents
Apparatus for converting VF signal into FM signal of cell phone Download PDFInfo
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- CN2877147Y CN2877147Y CN 200520047938 CN200520047938U CN2877147Y CN 2877147 Y CN2877147 Y CN 2877147Y CN 200520047938 CN200520047938 CN 200520047938 CN 200520047938 U CN200520047938 U CN 200520047938U CN 2877147 Y CN2877147 Y CN 2877147Y
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Abstract
The utility model relates to a device used with a mobile telephone to convert voice signals into frequency-modulated signals, which comprises an existing functional circuit contained inside the mobile telephone, wherein the utility model further comprises a switch, an audio conversion chip, a transmitting antenna module, and a frequency control circuit. Said audio conversion chip is connected to an audio output of the existing functional circuit inside the mobile telephone by the switch, and is further connected to the transmitting antenna module and the frequency control circuit respectively. The utility model can convert voice signals into frequency-modulated signals, so as to provide music, rings and incoming call sounds to the mobile telephone. The utility model features in low cost, large coverage and transmission range (up to tens of meters), clear sound, anti-jamming capability, simple structure, easy operation, and stable and reliable performance. The utility model has wide application range and can bring conveniences to the user.
Description
Technical field
The utility model relates to field of mobile phones, and particularly handset audio conversion of signals and output field specifically are meant the device that on a kind of mobile phone audio signal is converted to FM signal.
Background technology
In the mobile phone manufacturing, when certain notion performs to when ultimate attainment, new element moment of entering the court just.Therefore, in 2005, everybody saw scene of " pixel " and " music " exchange relay baton, had seen the swarm scene of MP3 of numerous cell phone manufacturers, so enter 2005, the mobile phone of various integrated MP3 playing functions replaces " image mobile phone " gradually becomes the emphasis that each manufacturer contends.But have only product about half a year as a kind of life cycle, how integrated how first and then practical function in mobile phone is the direction that numerous decision-makers make great efforts.
Use in the process of mobile phone at us, want sometimes to share your music, share the people's of incoming call sound with more people.In our automobile, it is that oneself is liked that the song in the CD often has only one or two head, can very easily share these information but a kind of means of present shortage make between the people, has brought certain inconvenience with regard to the live and work of giving people like this.
The utility model content
The purpose of this utility model is to have overcome above-mentioned shortcoming of the prior art, the device that provide that a kind of effective coverage range is big, sound clarity, anti-interference is stronger, with low cost, simple in structure, easy to operate, stable and reliable working performance, the scope of application are converted to audio signal on the mobile phone FM signal comparatively widely.
In order to realize above-mentioned purpose, the device that on the mobile phone of the present utility model audio signal is converted to FM signal has following formation:
On this mobile phone audio signal is converted to the device of FM signal, comprise the existing capability circuit in the mobile phone, its main feature is, described device comprises a diverter switch, audio conversion chip, transmitting antenna module and frequency control circuit, described audio conversion chip is connected by the audio output of the existing capability circuit in diverter switch and the mobile phone, and this audio conversion chip also is connected with frequency control circuit with the transmitting antenna module respectively.
The audio conversion chip model that on this mobile phone audio signal is converted to the device of FM signal is BH1417F.
The audio output that on this mobile phone audio signal is converted to the existing capability circuit in the mobile phone of device of FM signal is connected with the input pin of this BH1417F audio conversion chip respectively by diverter switch.
The frequency control circuit that on this mobile phone audio signal is converted to the device of FM signal is the high-low level commutation circuit, and is connected with the frequency adjustment function pin of this BH1417F audio conversion chip.
The transmitting antenna module that on this mobile phone audio signal is converted to the device of FM signal is connected with the FM signal output pin of this BH1417F audio conversion chip.
Adopted the device that on the mobile phone of this utility model audio signal is converted to FM signal, because the audio signal in the mobile phone is sent by the FM signal that this conversion equipment is converted into different frequency range, transmission range is tens meters scopes, the feasible sound that can easierly share music, the tinkle of bells, incoming call etc., and with low cost, only two or three U.S. dollars of needs just can be finished the manufacturing of entire circuit; Coverage is bigger simultaneously, and transmission range can be accomplished tens meters, and more people can receive the content in the mobile phone, during as foreign language teaching, can be put into the content of hearing in the mobile phone, just can be very easy to such an extent that last hearing is levied, greatly reduce instruction cost; Moreover, use this device to make sound clarity, can be clear through the FM signal after the handset processes as the sound in the radio station; And can prevent to disturb, because the FM signal of emission is enough strong, make the user can not receive the radio signals of original frequency, simultaneously simple in structure, easy to operate, stable and reliable working performance, the scope of application is comparatively extensive, brings great convenience for people's life.
Description of drawings
Fig. 1 is on the mobile phone of the present utility model being converted to audio signal the circuit theory diagrams of the device of FM signal.
Fig. 2 is on the mobile phone of the present utility model being converted to audio signal each module routine schematic diagram of the device of FM signal.
Embodiment
In order more to be expressly understood technology contents of the present utility model, describe in detail especially exemplified by following examples.
See also illustrated in figures 1 and 2, on this mobile phone audio signal is converted to the device of FM signal, comprise the existing capability circuit 4 in the mobile phone, wherein, described device comprises a diverter switch 1, audio conversion chip 2, transmitting antenna module 3 and frequency control circuit, and this audio conversion chip 2 is the audio conversion chip of BH1417F for the model of ROHM company; Described audio conversion chip 2 is connected by the audio output of the existing capability circuit 4 in diverter switch 1 and the mobile phone, in the present embodiment, the audio output of the existing capability circuit 4 in this mobile phone is connected with the input pin of this BH1417F audio conversion chip 2 respectively by diverter switch 1; And this audio conversion chip 2 also is connected with frequency control circuit with transmitting antenna module 3 respectively, in the present embodiment, this frequency control circuit is the high-low level commutation circuit, and adjusting the function pin with the frequency of this BH1417F audio conversion chip 2 is connected, simultaneously, this transmitting antenna module 3 is connected with the FM signal output pin of this BH1417F audio conversion chip 2.
In the middle of reality is used, described audio signal is by PIN1, the PIN22 input of this BH1417F audio conversion chip 2, through filtering, a series of processing such as mixing convert the voice signal of 20HZ～20KHZ to the FM signal of 88MHZ～109MHZ, launch from PIN11, the PLL of chip internal locks the frequency that transmits, and the size by PIN15～PIN18 adjusts frequency has so just formed audio conversion circuit.
This circuit is incorporated in the middle of the mobile phone, and concrete implementation procedure is:
At first, need the input that a switch comes the guide sound tone signal, the user can select whether to use this function like this.
Secondly, when adjusting frequency, needn't re-use rheostat, directly be selected by software, what following table was represented is the working method of PLL, and the high-low level of PIN15～PIN18 can be provided with by software, has so both save the space, can make things convenient for the user again.
| Control data | Frequency | |||
| D 0(Pin15) | D 1(Pin16) | D 2(Pin17) | D 3(Pin18) | |
| L | L | L | L | 87.7MHz |
| H | L | L | L | 87.9MHz |
| L | H | L | L | 88.1MHz |
| H | H | L | L | 88.3MHz |
| L | L | H | L | 88.5MHz |
| H | L | H | L | 88.7MHz |
| L | H | H | L | 88.9MHz |
| H | H | H | L | PLL stops, and the phase comparator terminal is supported high impedance |
| L | L | L | H | 106.7MHz |
| H | L | L | H | 106.9MHz |
| L | H | L | H | 107.1MHz |
| H | H | L | H | 107.3MHz |
| L | L | H | H | 107.5MHz |
| H | L | H | H | 107.7MHz |
| L | H | H | H | 107.9MHz |
| H | H | H | H | PLL stops, and the phase comparator terminal is supported high impedance |
Adopted the device that on the above-mentioned mobile phone audio signal is converted to FM signal, because the audio signal in the mobile phone is sent by the FM signal that this conversion equipment is converted into different frequency range, transmission range is tens meters scopes, the feasible sound that can easierly share music, the tinkle of bells, incoming call etc., and with low cost, only two or three U.S. dollars of needs just can be finished the manufacturing of entire circuit; Coverage is bigger simultaneously, and transmission range can be accomplished tens meters, and more people can receive the content in the mobile phone, during as foreign language teaching, can be put into the content of hearing in the mobile phone, just can be very easy to such an extent that last hearing is levied, greatly reduce instruction cost; Moreover, use this device to make sound clarity, can be clear through the FM signal after the handset processes as the sound in the radio station; And can prevent to disturb, because the FM signal of emission is enough strong, make the user can not receive the radio signals of original frequency, simultaneously simple in structure, easy to operate, stable and reliable working performance, the scope of application is comparatively extensive, brings great convenience for people's life.
In this specification, the utility model is described with reference to its certain embodiments.Can make various modifications and conversion obviously and not deviate from spirit and scope of the present utility model.Specification and accompanying drawing are regarded in an illustrative, rather than a restrictive.
Claims (5)
1, on a kind of mobile phone audio signal is converted to the device of FM signal, comprise the existing capability circuit in the mobile phone, it is characterized in that, described device comprises that one switches switch, audio conversion chip, transmitting antenna module and frequency control circuit, described audio conversion chip is connected by the audio output of the existing capability circuit in diverter switch and the mobile phone, and this audio conversion chip also is connected with frequency control circuit with the transmitting antenna module respectively.
2, on the mobile phone according to claim 1 audio signal is converted to the device of FM signal, it is characterized in that, described audio conversion chip model is BH1417F.
3, on the mobile phone according to claim 2 audio signal is converted to the device of FM signal, it is characterized in that the audio output of the existing capability circuit in the described mobile phone is connected with the input pin of this BH1417F audio conversion chip respectively by diverter switch.
4, according to the device that on claim 2 or the 3 described mobile phones audio signal is converted to FM signal, it is characterized in that, described frequency control circuit is the high-low level commutation circuit, and is connected with the frequency adjustment function pin of this BH1417F audio conversion chip.
According to the device that on claim 2 or the 3 described mobile phones audio signal is converted to FM signal, it is characterized in that 5, described transmitting antenna module is connected with the FM signal output pin of this BH1417F audio conversion chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520047938 CN2877147Y (en) | 2005-12-23 | 2005-12-23 | Apparatus for converting VF signal into FM signal of cell phone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520047938 CN2877147Y (en) | 2005-12-23 | 2005-12-23 | Apparatus for converting VF signal into FM signal of cell phone |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2877147Y true CN2877147Y (en) | 2007-03-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520047938 Expired - Fee Related CN2877147Y (en) | 2005-12-23 | 2005-12-23 | Apparatus for converting VF signal into FM signal of cell phone |
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| Country | Link |
|---|---|
| CN (1) | CN2877147Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008122156A1 (en) * | 2007-04-06 | 2008-10-16 | Dong Fang | Cell phone with music radio transmitting |
| CN102111190A (en) * | 2009-12-25 | 2011-06-29 | 康佳集团股份有限公司 | Method for transmitting file between mobile phones |
-
2005
- 2005-12-23 CN CN 200520047938 patent/CN2877147Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008122156A1 (en) * | 2007-04-06 | 2008-10-16 | Dong Fang | Cell phone with music radio transmitting |
| CN102111190A (en) * | 2009-12-25 | 2011-06-29 | 康佳集团股份有限公司 | Method for transmitting file between mobile phones |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070307 Termination date: 20111223 |