CN201869250U - Mobile phone device - Google Patents
Mobile phone device Download PDFInfo
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- CN201869250U CN201869250U CN2010206182119U CN201020618211U CN201869250U CN 201869250 U CN201869250 U CN 201869250U CN 2010206182119 U CN2010206182119 U CN 2010206182119U CN 201020618211 U CN201020618211 U CN 201020618211U CN 201869250 U CN201869250 U CN 201869250U
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- electric capacity
- loudspeaker
- resistance
- mobile device
- baseband chip
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Abstract
The utility model relates to the field of mobile communication terminals, and discloses a mobile phone device. Since a speaker is connected with the audio output end of a baseband chip through a first impedance matching circuit and the receiver output end of the baseband chip through a second impedance matching circuit, the audio output and the receiver output of the mobile phone can share the speaker, and thereby the production cost is reduced.
Description
Technical field
The utility model relates to the mobile communication terminal field, in particular a kind of mobile device.
Background technology
Along with the development of mobile communication and improving constantly of people's living standard, the use of mobile phone is more and more universal, and mobile phone has become indispensable means of communication in people's life.
The mobile phone of prior art has the output of three road audio frequency in its baseband circuit, the one road to loudspeaker, and one the road to receiver, also has one the road to earphone (some mobile phone does not dispose earphone).And loudspeaker and receiver, need take two first devices, be unfavorable for saving cost.
Therefore, prior art has yet to be improved and developed.
The utility model content
The technical problems to be solved in the utility model is that the above-mentioned defective at prior art provides a kind of mobile device, and it makes the audio frequency output and the receiver of mobile phone export shared loudspeaker, has reduced production cost.
The technical scheme that the utility model technical solution problem is adopted is as follows:
A kind of mobile device, comprise a mobile phone body, and be arranged on circuit board in the described mobile phone body, and described circuit board is provided with baseband chip, it is characterized in that, it comprises that also one is arranged on the loudspeaker on the described mobile phone body, and described loudspeaker are connected with the audio output of described baseband chip by first impedance matching circuit, and described loudspeaker also are connected with the receiver output of described baseband chip by second impedance matching circuit.
Described mobile device, wherein, the resistance of the described loudspeaker and first impedance matching circuit is 8 ohm.
Described mobile device, wherein, the resistance of the described loudspeaker and second impedance matching circuit is 32 ohm.
Described mobile device, wherein, described first impedance matching circuit comprises first electric capacity and second electric capacity;
A wherein end of described first electric capacity is connected with the SPK_N pin of described baseband chip audio frequency output, and its other end is connected with described loudspeaker by first holding wire;
A wherein end of described second electric capacity is connected with the SPK_P pin of described baseband chip audio frequency output, and its other end is connected with described loudspeaker by the secondary signal line.
Described mobile device, wherein, described first impedance matching circuit also comprises an audio frequency power amplifier chip, the input of described audio frequency power amplifier chip is connected to the audio output of described baseband chip respectively by described first electric capacity, second electric capacity;
The output of described audio frequency power amplifier chip is connected to described loudspeaker by described first holding wire, secondary signal line respectively.
Described mobile device, wherein, described first electric capacity, second electric capacity are the electric capacity of 0.1uF.
Described mobile device, wherein, described second impedance matching circuit comprises the 3rd electric capacity, the 4th electric capacity, first resistance and second resistance;
A wherein end of described the 3rd electric capacity is connected to the REC_P pin of described baseband chip receiver output; Its other end is connected to described loudspeaker by described first resistance;
A wherein end of described the 4th electric capacity is connected to the REC_N pin of described baseband chip receiver output, and its other end is connected to described loudspeaker by described second resistance.
Described mobile device, wherein, described the 3rd electric capacity, the 4th electric capacity are the electric capacity of 22 uF, the resistance of described first resistance, second resistance all is 12 ohm.
Described mobile device, wherein, between first holding wire that connects described loudspeaker and secondary signal line and be connected to the 6th electric capacity.
Described mobile device, wherein, described first holding wire also connects with reference to ground by the 5th electric capacity, and described secondary signal line also connects with reference to ground by the 7th electric capacity.
Mobile device provided by the utility model, owing to adopted described loudspeaker are connected with the audio output of described baseband chip by first impedance matching circuit, described loudspeaker also are connected with the receiver output of described baseband chip by second impedance matching circuit, it makes the audio frequency output and the receiver of mobile phone export shared loudspeaker, has reduced production cost.
Description of drawings
Fig. 1 is the mobile device perspective view of the utility model embodiment;
Fig. 2 is the mobile device circuit principle structure schematic diagram of the utility model embodiment.
Embodiment
A kind of mobile device provided by the utility model, clearer, clear and definite for making the purpose of this utility model, technical scheme and advantage, below the utility model is further described with reference to the accompanying drawing embodiment that develops simultaneously.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.
A kind of mobile device that the utility model embodiment is provided as shown in Figure 1, comprises a mobile phone body 100, and is arranged on the circuit board 110 in the described mobile phone body 100.
As shown in Figure 2, described circuit board 110 is provided with baseband chip 101, reaches the radio circuit 102 that is connected with described baseband chip 101.Wherein, as shown in Figure 1, it comprises that also one is arranged on the loudspeaker 120 on the described mobile phone body 100 mobile device of present embodiment, described loudspeaker 120 are connected with the audio output (SPK_N and SPK_P) of described baseband chip 101 by first impedance matching circuit 104, and described loudspeaker 120 also are connected with the receiver output (REC_P and REC_N) of described baseband chip 101 by second impedance matching circuit 103.
Wherein, promptly described SPK_N/SPK_P is the audio frequency output channel of loudspeaker, and it is 8 ohm that this passage requires the load of peripheral circuit.So the resistance coupling of the described loudspeaker 120 and first impedance matching circuit 104 is about 8 ohm.
And the impedance of receiver is about 32 ohm, and as shown in Figure 2, the resistance of the described loudspeaker 120 and second impedance matching circuit 103 is about 32 ohm.
Further, as shown in Figure 2, described first impedance matching circuit 104 comprises first capacitor C 1, second capacitor C 2 and an audio frequency power amplifier chip 105; A wherein end of described first capacitor C 1 is connected with the SPK_N pin of described baseband chip 101 audio outputs, and its other end is connected with described loudspeaker 120 by described audio frequency power amplifier chip 105.
A wherein end of described second capacitor C 2 is connected with the SPK_P pin of described baseband chip 101 audio outputs, and its other end is connected to described loudspeaker 120 by described audio frequency power amplifier chip 105.Wherein, described first electric capacity, second electric capacity are the electric capacity of 0.1uF.The output of described audio frequency power amplifier chip 105 is connected to described loudspeaker 120 by described first holding wire 106, secondary signal line 107 respectively.
Certainly, also can adopt cancellation audio frequency power amplifier chip 105, SPK_N pin, the SPK_P pin of baseband chip 101 audio input ends respectively be gone here and there directly receive on the loudspeaker after the 0.1uf electric capacity.That is, with wherein one being connected with the SPK_N pin of described baseband chip 101 audio outputs of described first capacitor C 1, its other end is connected with described loudspeaker 120 by first holding wire 106.A wherein end of described second capacitor C 2 is connected with the SPK_P pin of described baseband chip 101 audio outputs, and its other end is connected with described loudspeaker 120 by secondary signal line 107.
Described mobile device, as shown in Figure 2, the REC_N/REC_P of baseband chip is receiver output (passage) end, it is 32 ohm that this passage requires the peripheral circuit load.Second impedance matching circuit, 103 its impedances of being made up of the 3rd capacitor C 3, the 4th capacitor C 4, first resistance R 1 and second resistance R 2 also are 32 ohm.Wherein, described the 3rd electric capacity, the 4th electric capacity are the electric capacity of 22 uF, and the resistance of described first resistance, second resistance all is 12 ohm.
Preferably, a wherein end of described the 3rd capacitor C 3 is connected to the REC_P pin of described baseband chip 101 receiver outputs; Its other end is connected to described loudspeaker 120 by described first resistance R 1;
A wherein end of described the 4th capacitor C 4 is connected to the REC_N pin of described baseband chip 101 receiver outputs, and its other end is connected to described loudspeaker 120 by described second resistance R 2.Why can directly hold REC_N/REC_P to receive on the loudspeaker receiver output (passage) of baseband chip? because the impedance of these loudspeaker is 8 ohm, the utility model adopts has gone here and there 2 12 ohm resistance (first resistance R 1 as shown in Figure 2 and second resistance R 2) on the loop, so the impedance in whole loop is exactly ohm.(because these three impedances are series connection, 12+8+12=32), this has just solved resistance matching problem.
Further, as shown in Figure 2, between first holding wire 106 that connects described loudspeaker 120 and secondary signal line 107 and be connected to the 6th capacitor C 6.And described first holding wire 106 also connects with reference to ground by the 5th capacitor C 5, and described secondary signal line 107 also connects with reference to ground by the 7th capacitor C 7.
In circuit as shown in Figure 2, first capacitor C 1 and second capacitor C 2 act as coupling.Acting as every directly of the 3rd capacitor C 3 and the 4th capacitor C 4, the 5th capacitor C 5, the 6th capacitor C 6 and the 7th capacitor C 7 act as filtering, effectively the filtering noise improves the loudspeaker audio quality.
Circuit of the present utility model in addition is more flexible, if the volume when wish increasing receiver can suitably reduce the resistance of first resistance R 1 and second resistance R 2.This is very suitable in the design of low costs such as old man's machine, the high loudness of receiver.
In sum, mobile device provided by the utility model, owing to adopted described loudspeaker are connected with the audio output of described baseband chip by first impedance matching circuit, described loudspeaker also are connected with the receiver output of described baseband chip by second impedance matching circuit, it makes the audio frequency output and the receiver of mobile phone export shared loudspeaker, has reduced production cost.
Should be understood that; application of the present utility model is not limited to above-mentioned giving an example; for those of ordinary skills, can be improved according to the above description or conversion, all these improvement and conversion all should belong to the protection range of the utility model claims.
Claims (10)
1. mobile device, comprise a mobile phone body, and be arranged on circuit board in the described mobile phone body, and described circuit board is provided with baseband chip, it is characterized in that, it comprises that also one is arranged on the loudspeaker on the described mobile phone body, and described loudspeaker are connected with the audio output of described baseband chip by first impedance matching circuit, and described loudspeaker also are connected with the receiver output of described baseband chip by second impedance matching circuit.
2. mobile device according to claim 1 is characterized in that, the resistance of the described loudspeaker and first impedance matching circuit is 8 ohm.
3. mobile device according to claim 1 is characterized in that, the resistance of the described loudspeaker and second impedance matching circuit is 32 ohm.
4. mobile device according to claim 1 is characterized in that, described first impedance matching circuit comprises first electric capacity and second electric capacity;
A wherein end of described first electric capacity is connected with the SPK_N pin of described baseband chip audio frequency output, and its other end is connected with described loudspeaker by first holding wire;
A wherein end of described second electric capacity is connected with the SPK_P pin of described baseband chip audio frequency output, and its other end is connected with described loudspeaker by the secondary signal line.
5. mobile device according to claim 4, it is characterized in that, described first impedance matching circuit also comprises an audio frequency power amplifier chip, and the input of described audio frequency power amplifier chip is connected to the audio output of described baseband chip respectively by described first electric capacity, second electric capacity;
The output of described audio frequency power amplifier chip is connected to described loudspeaker by described first holding wire, secondary signal line respectively.
6. mobile device according to claim 4 is characterized in that, described first electric capacity, second electric capacity are the electric capacity of 0.1uF.
7. mobile device according to claim 1 is characterized in that, described second impedance matching circuit comprises the 3rd electric capacity, the 4th electric capacity, first resistance and second resistance;
A wherein end of described the 3rd electric capacity is connected to the REC_P pin of described baseband chip receiver output; Its other end is connected to described loudspeaker by described first resistance;
A wherein end of described the 4th electric capacity is connected to the REC_N pin of described baseband chip receiver output, and its other end is connected to described loudspeaker by described second resistance.
8. mobile device according to claim 7 is characterized in that, described the 3rd electric capacity, the 4th electric capacity are the electric capacity of 22 uF, and the resistance of described first resistance, second resistance all is 12 ohm.
9. mobile device according to claim 4 is characterized in that, between first holding wire that connects described loudspeaker and secondary signal line and be connected to the 6th electric capacity.
10. mobile device according to claim 9 is characterized in that, described first holding wire also connects with reference to ground by the 5th electric capacity, and described secondary signal line also connects with reference to ground by the 7th electric capacity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206182119U CN201869250U (en) | 2010-11-22 | 2010-11-22 | Mobile phone device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206182119U CN201869250U (en) | 2010-11-22 | 2010-11-22 | Mobile phone device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201869250U true CN201869250U (en) | 2011-06-15 |
Family
ID=44140392
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206182119U Expired - Fee Related CN201869250U (en) | 2010-11-22 | 2010-11-22 | Mobile phone device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201869250U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102006345A (en) * | 2010-11-22 | 2011-04-06 | 惠州Tcl移动通信有限公司 | Mobile phone device |
-
2010
- 2010-11-22 CN CN2010206182119U patent/CN201869250U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102006345A (en) * | 2010-11-22 | 2011-04-06 | 惠州Tcl移动通信有限公司 | Mobile phone device |
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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: 20110615 Termination date: 20131122 |