CN203608346U - Portable bluetooth speaker - Google Patents
Portable bluetooth speaker Download PDFInfo
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- CN203608346U CN203608346U CN201320771578.8U CN201320771578U CN203608346U CN 203608346 U CN203608346 U CN 203608346U CN 201320771578 U CN201320771578 U CN 201320771578U CN 203608346 U CN203608346 U CN 203608346U
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- 230000003321 amplification Effects 0.000 claims abstract description 30
- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 30
- 230000005236 sound signal Effects 0.000 claims abstract description 23
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 7
- 239000013078 crystal Substances 0.000 claims description 7
- 229910052744 lithium Inorganic materials 0.000 claims description 7
- 230000001052 transient effect Effects 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 16
- 230000000694 effects Effects 0.000 description 4
- 239000004065 semiconductor Substances 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
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Abstract
The utility model discloses a portable bluetooth speaker. The speaker comprises a power supply circuit, a charging management circuit, a DC booster circuit, a bluetooth circuit, an audio signal frequency response processing circuit, a class D power amplification circuit, an LED indicator circuit, a left channel loudspeaker, and a right channel loudspeaker. The power supply circuit is electrically connected to the LED indicator circuit, the bluetooth circuit and the charging management circuit. The power supply circuit is electrically connected to the DC booster circuit, an output terminal of which is electrically connected to the bluetooth circuit and the class D power amplification circuit separately. The LED indicator circuit is electrically connected to the bluetooth circuit. A signal output terminal of the bluetooth circuit, the audio signal frequency response processing circuit and the class D power amplification circuit are electrically connected one by one. An output terminal of the class D power amplification circuit is electrically connected to the left channel loudspeaker and the right channel loudspeaker separately. The speaker is high in power amplifying efficiency, low in distortion rate, good in transient response, and free of zero-crossing distortion.
Description
Technical field
The utility model relates to sound technique field, especially relates to the portable blue-tooth audio amplifier that a kind of tonequality is good.
Background technology
Portable loudspeaker box is conventional audio product in current people's life, does not need connecting line because portable blue-tooth audio amplifier has, small and exquisite portable advantage, and extensively received by consumer.
But there is following shortcoming in portable loudspeaker box:
While giving great volume, audio amplifier can send " " noise, lower tone; If adopt reduce gain prevent circuit send " " sound, the effective power of audio amplifier can not get fully playing.In addition, audio amplifier volume is little, and bass effect is bad.
Chinese patent mandate publication number: CN203167187U, authorizes open day on August 28th, 2013, discloses a kind of Baffle Box of Bluetooth, comprise housing, be arranged at audio interface, the data-interface of described surface of shell, be built in loud speaker, the control circuit board of described housing, described housing is silica gel shell.The weak point of this utility model is, while giving great volume, and lower tone, bass effect is bad.
Summary of the invention
Goal of the invention of the present utility model is that the deficiency that bass effect is bad, provides the portable blue-tooth audio amplifier that a kind of tonequality is good in order to overcome audio amplifier lower tone of the prior art.
To achieve these goals, the utility model is by the following technical solutions:
A kind of portable blue-tooth audio amplifier, comprises power supply circuits, charge management circuit, DC voltage booster circuit, Bluetooth circuit, audio signal frequency response treatment circuit, D class power amplification circuit, LED indicating circuit and left and right sound channels loud speaker; Power supply circuits are electrically connected with LED indicating circuit, Bluetooth circuit and charge management circuit respectively; Power supply circuits are electrically connected with DC voltage booster circuit, and the output of DC voltage booster circuit is electrically connected with Bluetooth circuit and D class power amplification circuit respectively; LED indicating circuit is electrically connected with Bluetooth circuit, and signal output part, audio signal frequency response treatment circuit and the D class power amplification circuit of Bluetooth circuit are electrically connected successively, and the output of D class power amplification circuit is electrically connected with left and right sound channels loud speaker respectively.
The power amplification circuit of portable loudspeaker box of the present utility model, when no signal input, amplifier is in cut-off state, not power consumption.When work, enter saturation condition by input signal by transistor, transistor is equivalent to the switch of a connection, and power supply and load are directly connected.Under perfect condition, not power consumption of transistor, in fact transistor can consume part electric energy, and power consumption is relevant with transistorized characteristic, and irrelevant with the size of signal output.
Therefore, the utlity model has power amplification efficiency high, the temperature rise of semiconductor device obviously reduces, and distortion rate is little, and transient response is good, without the feature of zero crossing distortion.
As preferably, described D class power amplification circuit comprises SE2602 chip, magnetic core inductance F2,1F1,2F1,1F2,1F3,2F2,2F3, electric capacity 1C5,2C5, C11, C12, C13, C14, C15, C16, resistance R 12, R13 and audio output interface, audio output interface is electrically connected with left and right sound channels loud speaker respectively;
The the 2nd, 9,11 and 15 pin ground connection of SE2602 chip; The 12nd pin of SE2602 chip is electrically connected with C11 one end, C11 other end ground connection; The 10th pin of SE2602 chip is electrically connected with 2C5 one end, 2F1 one end respectively, 2C5 other end ground connection, and the 2F1 other end is electrically connected with audio signal frequency response treatment circuit; The 8th pin of SE2602 chip is electrically connected with C12 one end, C12 other end ground connection; The 7th pin of SE2602 chip is electrically connected with 1F1 one end and 1C5 one end respectively, 1C5 other end ground connection, and the 1F1 other end is electrically connected with audio signal frequency response treatment circuit; The 5th pin of SE2602 chip is electrically connected with R12 one end; The 6th pin of SE2602 chip is electrically connected with C13 one end and R13 one end respectively, C13 other end ground connection; The 4th pin of SE2602 chip is electrically connected with the R12 other end, F2 one end, the 13rd pin, the R13 other end, C14 one end, C15 one end and C16 one end respectively, C14, C15 and the equal ground connection of the C16 other end, and the F2 other end is electrically connected with Bluetooth circuit; The 1st pin of SE2602 chip is electrically connected with 1F2 one end, the 3rd pin of SE2602 chip is electrically connected with 1F3 one end, the 14th pin of SE2602 chip is electrically connected with 2F2 one end, the 16th pin of SE2602 chip is electrically connected with 2F3 one end, and 1F2,1F3,2F2 and the 2F3 other end are all electrically connected with audio output interface.
The circuit connecting mode of D class power amplification circuit can reach the high-quality of music and restore, and effectively improves audio amplifier tonequality.
As preferably, described D class power amplification circuit also comprises 1C6,1C7,2C6 and 2C7, the 1F2 other end is electrically connected with 1C7, the 1F3 other end is electrically connected with 1C6 one end, the 2F2 other end is electrically connected with 2C6 one end, the 2F3 other end is electrically connected with 2C7 one end, 1C6,1C7,2C6 and the equal ground connection of the 2C7 other end.
The effect of filtering is played in the setting of 1C6,1C7,2C6 and 2C7, has further improved the tonequality of audio amplifier.
As preferably, described Bluetooth circuit comprises that bluetooth module, volume increase button, volume down button, microphone, crystal oscillator and discharge circuit; Volume increases button, volume down button, microphone and crystal oscillator and is electrically connected with bluetooth module respectively, and the signal output part of bluetooth module is electrically connected with discharge circuit, and the output of discharge circuit is electrically connected with audio signal frequency response treatment circuit.
As preferably, also comprise auxiliary input socket, auxiliary input socket is electrically connected with discharge circuit and audio signal frequency response treatment circuit respectively.
As preferably, power supply circuits comprise lithium battery and USB power supply; Lithium battery is electrically connected with LED indicating circuit and charge management circuit respectively, and USB power supply is electrically connected with LED indicating circuit and charge management circuit respectively.
Therefore, the utlity model has following beneficial effect: (1) power amplification efficiency is high, and distortion rate is little; (2) transient response is good, without zero crossing distortion.
Accompanying drawing explanation
Fig. 1 is a kind of theory diagram of the present utility model;
Fig. 2 is a kind of circuit diagram of power amplification circuit of the present utility model;
Fig. 3 is a kind of integrated circuit figure of the present utility model;
Fig. 4 is a kind of circuit diagram of Bluetooth circuit of the present utility model;
Fig. 5 is a kind of circuit diagram of DC voltage booster circuit of the present utility model;
Fig. 6 is a kind of circuit diagram of charge management circuit of the present utility model;
Fig. 7 is a kind of circuit diagram of power supply circuits of the present utility model;
Fig. 8 is a kind of circuit diagram of auxiliary input socket of the present utility model;
Fig. 9 is a kind of circuit diagram of audio signal frequency response treatment circuit of the present utility model;
Figure 10 is a kind of circuit diagram of LED indicating circuit of the present utility model.
In figure: power supply circuits 1, charge management circuit 2, DC voltage booster circuit 3, auxiliary input socket 4, audio signal frequency response treatment circuit 5, power amplification circuit 6, LED indicating circuit 7, Bluetooth circuit 8, loud speaker 9, audio output interface 10, bluetooth module 11, volume increase button 12, volume down button 13, microphone 14, crystal oscillator 15, discharge circuit 16, lithium battery 17, USB power supply 18.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is further described.
Embodiment is as shown in Figure 1, Figure 3 a kind of portable blue-tooth audio amplifier, comprises power supply circuits 1, charge management circuit 2, DC voltage booster circuit 3, Bluetooth circuit 8, audio signal frequency response treatment circuit 5, D class power amplification circuit 6, LED indicating circuit 7 and left and right sound channels loud speaker 9; Power supply circuits are electrically connected with LED indicating circuit, Bluetooth circuit and charge management circuit respectively; Power supply circuits are electrically connected with DC voltage booster circuit, and the output of DC voltage booster circuit is electrically connected with Bluetooth circuit and D class power amplification circuit respectively; LED indicating circuit is electrically connected with Bluetooth circuit, and signal output part, audio signal frequency response treatment circuit and the D class power amplification circuit of Bluetooth circuit are electrically connected successively, and the output of D class power amplification circuit is electrically connected with left and right sound channels loud speaker respectively.
As shown in Figure 1, Bluetooth circuit comprises that bluetooth module 11, volume increase button 12, volume down button 13, microphone 14, crystal oscillator 15 and discharge circuit 16; Volume increases button, volume down button, microphone and crystal oscillator and is electrically connected with bluetooth module respectively, and the signal output part of bluetooth module is electrically connected with discharge circuit, and the output of discharge circuit is electrically connected with audio signal frequency response treatment circuit.
Also comprise auxiliary input socket 4, auxiliary input socket is electrically connected with discharge circuit and audio signal frequency response treatment circuit respectively.Power supply circuits comprise lithium battery 17 and USB power supply 18; Lithium battery is electrically connected with LED indicating circuit and charge management circuit respectively, and USB power supply is electrically connected with LED indicating circuit and charge management circuit respectively.
Fig. 4 is a kind of circuit diagram of Bluetooth circuit of the present utility model, Fig. 5 is a kind of circuit diagram of DC voltage booster circuit of the present utility model, Fig. 6 is a kind of circuit diagram of charge management circuit of the present utility model, Fig. 7 is a kind of circuit diagram of power supply circuits of the present utility model, Fig. 8 is a kind of circuit diagram of auxiliary input socket of the present utility model, Fig. 9 is a kind of circuit diagram of audio signal frequency response treatment circuit of the present utility model, and Figure 10 is a kind of circuit diagram of LED indicating circuit of the present utility model.
As shown in Figure 2, D class power amplification circuit comprises SE2602 chip, magnetic core inductance F2,1F1,2F1,1F2,1F3,2F2,2F3, electric capacity 1C5,2C5, C11, C12, C13, C14, C15, C16, resistance R 12, R13 and audio output interface 10, audio output interface is electrically connected with left and right sound channels loud speaker respectively;
The the 2nd, 9,11 and 15 pin ground connection of SE2602 chip; The 12nd pin of SE2602 chip is electrically connected with C11 one end, C11 other end ground connection; The 10th pin of SE2602 chip is electrically connected with 2C5 one end, 2F1 one end respectively, 2C5 other end ground connection, and the 2F1 other end is electrically connected with audio signal frequency response treatment circuit; The 8th pin of SE2602 chip is electrically connected with C12 one end, C12 other end ground connection; The 7th pin of SE2602 chip is electrically connected with 1F1 one end and 1C5 one end respectively, 1C5 other end ground connection, and the 1F1 other end is electrically connected with audio signal frequency response treatment circuit; The 5th pin of SE2602 chip is electrically connected with R12 one end; The 6th pin of SE2602 chip is electrically connected with C13 one end and R13 one end respectively, C13 other end ground connection; The 4th pin of SE2602 chip is electrically connected with the R12 other end, F2 one end, the 13rd pin, the R13 other end, C14 one end, C15 one end and C16 one end respectively, C14, C15 and the equal ground connection of the C16 other end, and the F2 other end is electrically connected with Bluetooth circuit; The 1st pin of SE2602 chip is electrically connected with 1F2 one end, the 3rd pin of SE2602 chip is electrically connected with 1F3 one end, the 14th pin of SE2602 chip is electrically connected with 2F2 one end, the 16th pin of SE2602 chip is electrically connected with 2F3 one end, and 1F2,1F3,2F2 and the 2F3 other end are all electrically connected with audio output interface.
D class power amplification circuit also comprises 1C6,1C7,2C6 and 2C7, the 1F2 other end is electrically connected with 1C7, and the 1F3 other end is electrically connected with 1C6 one end, and the 2F2 other end is electrically connected with 2C6 one end, the 2F3 other end is electrically connected with 2C7 one end, 1C6,1C7,2C6 and the equal ground connection of the 2C7 other end.
The power amplification circuit of portable loudspeaker box of the present utility model, when no signal input, amplifier is in cut-off state, not power consumption.When work, enter saturation condition by input signal by transistor, transistor is equivalent to the switch of a connection, and power supply and load are directly connected.Under perfect condition, not power consumption of transistor, in fact transistor can consume part electric energy, and power consumption is relevant with transistorized characteristic, and irrelevant with the size of signal output.
Therefore, the utlity model has power amplification efficiency high, the temperature rise of semiconductor device obviously reduces, and distortion rate is little, and transient response is good, without the feature of zero crossing distortion.
Audio amplifier of the present utility model does not adopt echo tube to increase bass, loud speaker adopts the passive loudspeaker of full rubber of 40mm*70mm, fit on is than more save space of traditional echo tube, in the lower and sense of hearing of the playback frequency of bass distortion also little, more can reduce truly low frequency audio.
Should be understood that the present embodiment is only not used in restriction scope of the present utility model for the utility model is described.In addition should be understood that those skilled in the art can make various changes or modifications the utility model after having read the content of the utility model instruction, these equivalent form of values fall within the application's appended claims limited range equally.
Claims (6)
1. a portable blue-tooth audio amplifier, it is characterized in that, comprise power supply circuits (1), charge management circuit (2), DC voltage booster circuit (3), Bluetooth circuit (8), audio signal frequency response treatment circuit (5), D class power amplification circuit (6), LED indicating circuit (7) and left and right sound channels loud speaker (9); Power supply circuits are electrically connected with LED indicating circuit, Bluetooth circuit and charge management circuit respectively; Power supply circuits are electrically connected with DC voltage booster circuit, and the output of DC voltage booster circuit is electrically connected with Bluetooth circuit and D class power amplification circuit respectively; LED indicating circuit is electrically connected with Bluetooth circuit, and signal output part, audio signal frequency response treatment circuit and the D class power amplification circuit of Bluetooth circuit are electrically connected successively, and the output of D class power amplification circuit is electrically connected with left and right sound channels loud speaker respectively.
2. portable blue-tooth audio amplifier according to claim 1, it is characterized in that, described D class power amplification circuit comprises SE2602 chip, magnetic core inductance F2,1F1,2F1,1F2,1F3,2F2,2F3, electric capacity 1C5,2C5, C11, C12, C13, C14, C15, C16, resistance R 12, R13 and audio output interface (10), audio output interface is electrically connected with left and right sound channels loud speaker respectively;
The the 2nd, 9,11 and 15 pin ground connection of SE2602 chip; The 12nd pin of SE2602 chip is electrically connected with C11 one end, C11 other end ground connection; The 10th pin of SE2602 chip is electrically connected with 2C5 one end, 2F1 one end respectively, 2C5 other end ground connection, and the 2F1 other end is electrically connected with audio signal frequency response treatment circuit; The 8th pin of SE2602 chip is electrically connected with C12 one end, C12 other end ground connection; The 7th pin of SE2602 chip is electrically connected with 1F1 one end and 1C5 one end respectively, 1C5 other end ground connection, and the 1F1 other end is electrically connected with audio signal frequency response treatment circuit; The 5th pin of SE2602 chip is electrically connected with R12 one end; The 6th pin of SE2602 chip is electrically connected with C13 one end and R13 one end respectively, C13 other end ground connection; The 4th pin of SE2602 chip is electrically connected with the R12 other end, F2 one end, the 13rd pin, the R13 other end, C14 one end, C15 one end and C16 one end respectively, C14, C15 and the equal ground connection of the C16 other end, and the F2 other end is electrically connected with Bluetooth circuit; The 1st pin of SE2602 chip is electrically connected with 1F2 one end, the 3rd pin of SE2602 chip is electrically connected with 1F3 one end, the 14th pin of SE2602 chip is electrically connected with 2F2 one end, the 16th pin of SE2602 chip is electrically connected with 2F3 one end, and 1F2,1F3,2F2 and the 2F3 other end are all electrically connected with audio output interface.
3. portable blue-tooth audio amplifier according to claim 2, it is characterized in that, described D class power amplification circuit also comprises 1C6,1C7,2C6 and 2C7, the 1F2 other end is electrically connected with 1C7, the 1F3 other end is electrically connected with 1C6 one end, the 2F2 other end is electrically connected with 2C6 one end, and the 2F3 other end is electrically connected with 2C7 one end, 1C6,1C7,2C6 and the equal ground connection of the 2C7 other end.
4. portable blue-tooth audio amplifier according to claim 1, it is characterized in that, described Bluetooth circuit comprises that bluetooth module (11), volume increase button (12), volume down button (13), microphone (14), crystal oscillator (15) and discharge circuit (16); Volume increases button, volume down button, microphone and crystal oscillator and is electrically connected with bluetooth module respectively, and the signal output part of bluetooth module is electrically connected with discharge circuit, and the output of discharge circuit is electrically connected with audio signal frequency response treatment circuit.
5. portable blue-tooth audio amplifier according to claim 4, is characterized in that, also comprises auxiliary input socket (4), and auxiliary input socket is electrically connected with discharge circuit and audio signal frequency response treatment circuit respectively.
6. according to the portable blue-tooth audio amplifier described in claim 1 or 2 or 3 or 4 or 5, it is characterized in that, power supply circuits comprise lithium battery (17) and USB power supply (18); Lithium battery is electrically connected with LED indicating circuit and charge management circuit respectively, and USB power supply is electrically connected with LED indicating circuit and charge management circuit respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320771578.8U CN203608346U (en) | 2013-11-28 | 2013-11-28 | Portable bluetooth speaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320771578.8U CN203608346U (en) | 2013-11-28 | 2013-11-28 | Portable bluetooth speaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203608346U true CN203608346U (en) | 2014-05-21 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320771578.8U Expired - Lifetime CN203608346U (en) | 2013-11-28 | 2013-11-28 | Portable bluetooth speaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203608346U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106534411A (en) * | 2016-11-09 | 2017-03-22 | Tcl通讯（宁波）有限公司 | Volume boost driving device and mobile terminal |
| US10601373B2 (en) | 2016-03-31 | 2020-03-24 | Tymphany Hk Limited | Booster circuit including dynamically sliding power supply unit |
-
2013
- 2013-11-28 CN CN201320771578.8U patent/CN203608346U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10601373B2 (en) | 2016-03-31 | 2020-03-24 | Tymphany Hk Limited | Booster circuit including dynamically sliding power supply unit |
| CN106534411A (en) * | 2016-11-09 | 2017-03-22 | Tcl通讯（宁波）有限公司 | Volume boost driving device and mobile terminal |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140521 |