CN204697274U - A kind of digital audio power amplification system of Bluetooth audio device - Google Patents
A kind of digital audio power amplification system of Bluetooth audio device Download PDFInfo
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- CN204697274U CN204697274U CN201520342569.6U CN201520342569U CN204697274U CN 204697274 U CN204697274 U CN 204697274U CN 201520342569 U CN201520342569 U CN 201520342569U CN 204697274 U CN204697274 U CN 204697274U
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Abstract
The utility model provides a kind of digital audio power amplification system of Bluetooth audio device, comprise: power supply, power-supplying circuit, digital power amplifying circuit and loudspeaker, the output of described power supply connects power-supplying circuit, the output of described power-supplying circuit connects digital power amplifying circuit, the output of described digital power amplifying circuit connects loudspeaker, described digital power amplifying circuit comprises Bluetooth receptions module, preamplifier, Audio Controller and drive amplification circuit, the output of Bluetooth receptions module connects preamplifier, the output of described preamplifier connects Audio Controller, the output of described Audio Controller connects drive amplification circuit, the output of described drive amplification circuit connects loudspeaker.The utility model, by arranging Bluetooth receptions module, can dock with the bluetooth sending module of other equipment and realize radio play, and structure is simple, easy to use; Guarantee that the long-term stability of audio power amplifier circuit is run.
Description
Technical field
The utility model relates to a kind of sound equipment, is specifically related to a kind of digital audio power amplification system of Bluetooth audio device.
Background technology
Sound equipment is well received by consumers as music player devices, at present, the known sound equipment of people mainly realizes its playing function by being connected with various audiogenic device, such as be connected with VCD, MP3, computer, but this sound equipment generally all needs to connect external power source, carry inconvenience, therefore inconvenience and play whenever and wherever possible with oneself, if will carry out outside playing, need to carry power supply separately, or look for the civil power position carrying out transferring to play, make scope of application critical constraints.At present for the Audio power amplifier chip of the overwhelming majority, load for loudspeaker has certain requirement, in order to realize better audio frequency output quality, when the loudspeaker of the little load resistance of material, more easily occur that loudspeaker load damages comparatively greatly the problem of loudspeaker, and then occur that big current returns string and damages audio power chip, like this by the range of application of restricting audio power amplifier chip greatly.
Utility model content
In order to overcome above-mentioned prior art Problems existing, the utility model provides a kind of digital audio power amplification system of Bluetooth audio device.
The technical scheme that the utility model is taked is: a kind of digital audio power amplification system of Bluetooth audio device, it is characterized in that, comprise: power supply, power-supplying circuit, digital power amplifying circuit and loudspeaker, the output of described power supply connects power-supplying circuit, the output of described power-supplying circuit connects digital power amplifying circuit, the output of described digital power amplifying circuit connects loudspeaker, described digital power amplifying circuit comprises Bluetooth receptions module, preamplifier, Audio Controller and drive amplification circuit, the output of Bluetooth receptions module connects preamplifier, the output of described preamplifier connects Audio Controller, the output of described Audio Controller connects drive amplification circuit, the output of described drive amplification circuit connects loudspeaker.
Further, described power-supplying circuit comprises diode D1 and discharge circuit, described discharge circuit is by resistance R1, resistance R2 and triode Q1 forms, the output of described power supply connects the anode of diode D1, the negative electrode of described diode D1 connects digital power amplifying circuit, the two ends of described first resistance R1 connect the output of described power supply and the base stage of described triode Q1 respectively, one end of described second resistance R2 connects the collector electrode of described triode Q1, other end ground connection, the emitter of described triode Q1 connects the input of digital power amplifying circuit.
Further, described drive amplification circuit comprises output control circuit and feedback control circuit, described output control circuit comprises output circuit and charge pump circuit, described output circuit is made up of positive output end and negative output terminal, described positive output end is connected with the output of charge pump circuit with diode D3 by diode D2 with negative output terminal, described diode D2 is connected with described positive input terminal and negative input end with the anode of diode D3, described diode D2 is connected with the output of charge pump circuit with the negative electrode of diode D3, between described positive output end and negative output terminal, feedback control circuit is set, described positive output end and negative output terminal are connected to the positive-negative input end of loudspeaker.
Further, described feedback control circuit comprises the first feedback capacity C1, the second feedback capacity C2 and feedback resistance R3, described second feedback capacity C2 with connect after the first feedback capacity C1 and feedback resistance R3 parallel connection access positive output end and negative output terminal.
The beneficial effects of the utility model are: in the utility model embodiment, by arranging Bluetooth receptions module, can dock realize radio play with the bluetooth sending module of other equipment, and structure is simple, easy to use; By arranging power-supplying circuit, power supply is controlled, the phenomenon that when preventing digital power amplifying circuit output low frequency audio signal, electric current is refunded, and voltage stabilizing is carried out to operating voltage; By arranging diode between output circuit and charge pump circuit, when loudspeaker export big current, two diodes can play the effect of one-way conduction, and then realize the protection to Audio Controller, guarantee that the long-term stability of audio power amplifier circuit is run; By being connected with feedback capacity and feed resistance between positive output end and negative output terminal, AC and DC signal being fed back, avoiding Audio Controller self-excitation phenomena and damage Audio Controller and loudspeaker in the course of the work.
Accompanying drawing explanation
The digital audio power amplification system structure chart of a kind of Bluetooth audio device that Fig. 1 provides for the utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in detail.
See Fig. 1, it is the digital audio power amplification system structure chart of a kind of Bluetooth audio device that the utility model provides.
As shown in Figure 1, a kind of digital audio power amplification system of Bluetooth audio device, it is characterized in that, comprise: power supply, power-supplying circuit, digital power amplifying circuit and loudspeaker, the output of described power supply connects power-supplying circuit, the output of described power-supplying circuit connects digital power amplifying circuit, the output of described digital power amplifying circuit connects loudspeaker, described digital power amplifying circuit comprises Bluetooth receptions module, preamplifier, Audio Controller and drive amplification circuit, the output of Bluetooth receptions module connects preamplifier, the output of described preamplifier connects Audio Controller, the output of described Audio Controller connects drive amplification circuit, the output of described drive amplification circuit connects loudspeaker.
In the utility model embodiment, by arranging Bluetooth receptions module, can dock realize radio play with the bluetooth sending module of other equipment, structure is simple, easy to use.
Further, described power-supplying circuit comprises diode D1 and discharge circuit, described discharge circuit is by resistance R1, resistance R2 and triode Q1 forms, the output of described power supply connects the anode of diode D1, the negative electrode of described diode D1 connects digital power amplifying circuit, the two ends of described first resistance R1 connect the output of described power supply and the base stage of described triode Q1 respectively, one end of described second resistance R2 connects the collector electrode of described triode Q1, other end ground connection, the emitter of described triode Q1 connects the input of digital power amplifying circuit.
In the utility model embodiment, by arranging power-supplying circuit, power supply is controlled, the phenomenon that when preventing digital power amplifying circuit output low frequency audio signal by arranging diode, electric current is refunded, adopts discharge circuit to carry out voltage stabilizing to the operating voltage of digital power amplifying circuit.
Further, described drive amplification circuit comprises output control circuit and feedback control circuit, described output control circuit comprises output circuit and charge pump circuit, described output circuit is made up of positive output end and negative output terminal, described positive output end is connected with the output of charge pump circuit with diode D3 by diode D2 with negative output terminal, described diode D2 is connected with described positive input terminal and negative input end with the anode of diode D3, described diode D2 is connected with the output of charge pump circuit with the negative electrode of diode D3, between described positive output end and negative output terminal, feedback control circuit is set, described positive output end and negative output terminal are connected to the positive-negative input end of loudspeaker.
In the utility model embodiment; by arranging diode between output circuit and charge pump circuit, when loudspeaker export big current, two diodes can play the effect of one-way conduction; and then the protection realized Audio Controller, guarantee that the long-term stability of audio power amplifier circuit is run.
Further, described feedback control circuit comprises the first feedback capacity C1, the second feedback capacity C2 and feedback resistance R3, described second feedback capacity C2 with connect after the first feedback capacity C1 and feedback resistance R3 parallel connection access positive output end and negative output terminal.
In the utility model embodiment, by being connected with feedback capacity and feed resistance between positive output end and negative output terminal, AC and DC signal is fed back, avoid Audio Controller self-excitation phenomena and damage Audio Controller and loudspeaker in the course of the work, an output capacitance is connected to, the other end ground connection of described two output capacitances between positive output end and negative output terminal.
Above the utility model is described in detail, but the utility model is not limited to above-mentioned execution mode, in the ken that those of ordinary skill in the art possess, can also makes a variety of changes under the prerequisite not departing from the utility model aim.Do not depart from design of the present utility model and scope can make many other and change and remodeling.Should be appreciated that the utility model is not limited to specific execution mode, scope of the present utility model is defined by the following claims.
Claims (4)
1. the digital audio power amplification system of a Bluetooth audio device, it is characterized in that, comprise: power supply, power-supplying circuit, digital power amplifying circuit and loudspeaker, the output of described power supply connects power-supplying circuit, the output of described power-supplying circuit connects digital power amplifying circuit, the output of described digital power amplifying circuit connects loudspeaker, described digital power amplifying circuit comprises Bluetooth receptions module, preamplifier, Audio Controller and drive amplification circuit, the output of Bluetooth receptions module connects preamplifier, the output of described preamplifier connects Audio Controller, the output of described Audio Controller connects drive amplification circuit, the output of described drive amplification circuit connects loudspeaker.
2. the digital audio power amplification system of a kind of Bluetooth audio device according to claim 1, it is characterized in that, described power-supplying circuit comprises diode D1 and discharge circuit, described discharge circuit is by resistance R1, resistance R2 and triode Q1 forms, the output of described power supply connects the anode of diode D1, the negative electrode of described diode D1 connects digital power amplifying circuit, the two ends of described resistance R1 connect the output of described power supply and the base stage of described triode Q1 respectively, one end of described resistance R2 connects the collector electrode of described triode Q1, other end ground connection, the emitter of described triode Q1 connects the input of digital power amplifying circuit.
3. the digital audio power amplification system of a kind of Bluetooth audio device according to claim 1, it is characterized in that, described drive amplification circuit comprises output control circuit and feedback control circuit, described output control circuit comprises output circuit and charge pump circuit, described output circuit is made up of positive output end and negative output terminal, described positive output end is connected with the output of charge pump circuit with diode D3 by diode D2 with negative output terminal, described diode D2 is connected with described positive input terminal and negative input end with the anode of diode D3, described diode D2 is connected with the output of charge pump circuit with the negative electrode of diode D3, between described positive output end and negative output terminal, feedback control circuit is set, described positive output end and negative output terminal are connected to the positive-negative input end of loudspeaker.
4. the digital audio power amplification system of a kind of Bluetooth audio device according to claim 3, it is characterized in that, described feedback control circuit comprises the first feedback capacity C1, the second feedback capacity C2 and feedback resistance R3, described second feedback capacity C2 with connect after the first feedback capacity C1 and feedback resistance R3 parallel connection access positive output end and negative output terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520342569.6U CN204697274U (en) | 2015-05-25 | 2015-05-25 | A kind of digital audio power amplification system of Bluetooth audio device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520342569.6U CN204697274U (en) | 2015-05-25 | 2015-05-25 | A kind of digital audio power amplification system of Bluetooth audio device |
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| CN204697274U true CN204697274U (en) | 2015-10-07 |
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| CN201520342569.6U Active CN204697274U (en) | 2015-05-25 | 2015-05-25 | A kind of digital audio power amplification system of Bluetooth audio device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115119090A (en) * | 2022-07-06 | 2022-09-27 | 中网电声科技(南京)有限公司 | Creative artistic hidden installation mode of indoor ultrathin loudspeaker |
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2015
- 2015-05-25 CN CN201520342569.6U patent/CN204697274U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115119090A (en) * | 2022-07-06 | 2022-09-27 | 中网电声科技(南京)有限公司 | Creative artistic hidden installation mode of indoor ultrathin loudspeaker |
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