CN209545858U - A kind of active audio amplifier - Google Patents
A kind of active audio amplifier Download PDFInfo
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- CN209545858U CN209545858U CN201920402466.2U CN201920402466U CN209545858U CN 209545858 U CN209545858 U CN 209545858U CN 201920402466 U CN201920402466 U CN 201920402466U CN 209545858 U CN209545858 U CN 209545858U
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- audio amplifier
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Abstract
The utility model discloses a kind of active audio amplifiers, it is related to an electro-technical field, it include: bluetooth power amplifier unit, electron tube Simulation scale-up unit, AD conversion unit, digital amplifying unit and loudspeaker, the output end of the bluetooth power amplifier unit connects the input terminal of the electron tube Simulation scale-up unit, the output end of the electron tube Simulation scale-up unit connects the input terminal of the AD conversion unit, the output end of the AD conversion unit connects the input terminal of the digital amplifying unit, the output end of the number amplifying unit connects the input terminal of the loudspeaker, audio signal is amplified in such a way that electron tube Simulation scale-up unit and digital amplifying unit combine, it is more soft to realize a kind of tone color, more there is the active audio amplifier of charm, in addition, allow to wirelessly connect audiogenic device by bluetooth power amplifier unit, It is more convenient to use.
Description
Technical field
The utility model relates to family's electro-technical field, especially a kind of active audio amplifier.
Background technique
Active audio amplifier refers to a kind of equipment that audio signal can be transformed to sound, and popular saying just refers to active audio amplifier host
Power amplifier is carried in cabinet or subwoofer cabinet, and audio signal is amplified and is played back out after handling by active audio amplifier itself
Sound makes its sound become larger.
Existing active audio amplifier mostly uses common amplifier, and sound quality is more general.
Utility model content
The utility model is intended to solve at least some of the technical problems in related technologies.For this purpose, this reality
It is to provide a kind of better active audio amplifier of sound quality with a novel purpose.
The technical scheme adopted by the utility model is
A kind of active audio amplifier, comprising: bluetooth power amplifier unit, electron tube Simulation scale-up unit, AD conversion unit, number amplification
Unit and loudspeaker, the output end of the bluetooth power amplifier unit connects the input terminal of the electron tube Simulation scale-up unit, described
The output end of electron tube Simulation scale-up unit connects the input terminal of the AD conversion unit, and the output end of the AD conversion unit connects
The input terminal of the digital amplifying unit is connect, the output end of the number amplifying unit connects the input terminal of the loudspeaker.
It further, further include main control unit, the input of the output end of the main control unit and the digital amplifying unit
End connection.
It further, further include power supply unit, the power supply unit is used to be the bluetooth power amplifier unit, the electron tube
Simulation scale-up unit, the AD conversion unit, the main control unit and the digital amplifying unit power supply.
It further, further include USB interface, the USB interface is electrically connected with the bluetooth power amplifier unit.
It further, further include AUX interface, the AUX interface is electrically connected with the bluetooth power amplifier unit.
Further, the digital amplifying unit includes high pitch amplifying unit, middle pitch amplifying unit and bass amplifying unit.
Further, the AD conversion unit includes PCM 1860DBTR chip.
Further, the main control unit includes STM320 series monolithic.
Further, the digital amplifying unit includes NTP8204 chip.
The utility model discloses a kind of active audio amplifiers, including bluetooth power amplifier unit, electron tube Simulation scale-up unit, AD to turn
Unit, digital amplifying unit and loudspeaker are changed, the mode that electron tube Simulation scale-up unit and digital amplifying unit combine is to audio
Signal amplifies, and realizes that a kind of tone color is more soft, more has the active audio amplifier of charm.
In addition, allow to wirelessly connect audiogenic device by bluetooth power amplifier unit, it is more convenient to use.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of one specific embodiment of active audio amplifier in the utility model；
Fig. 2 is a kind of active audio amplifier still another embodiment structural schematic diagram in the utility model；
Fig. 3 is a kind of circuit diagram of AD conversion unit in one specific embodiment of active audio amplifier in the utility model；
Fig. 4 is a kind of circuit diagram of digital amplifying unit in one specific embodiment of active audio amplifier in the utility model.
Specific embodiment
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.
As shown in FIG. 1, FIG. 1 is the schematic diagrams of a specific embodiment of active audio amplifier a kind of in the utility model, including indigo plant
Tooth power amplifier unit, electron tube Simulation scale-up unit, AD conversion unit, digital amplifying unit and loudspeaker, the bluetooth power amplifier list
The output end of member connects the input terminal of the electron tube Simulation scale-up unit, and the output end of the electron tube Simulation scale-up unit connects
The input terminal of the AD conversion unit is connect, the output end of the AD conversion unit connects the input terminal of the digital amplifying unit,
The output end of the number amplifying unit connects the input terminal of the loudspeaker.
The bluetooth power amplifier unit is sent after converting analog signal for the audio signal for receiving audio signal
Electron pipe die intends amplifying unit, after electron tube Simulation scale-up unit carries out level-one amplification, sends a signal to AD conversion
Unit after AD conversion unit converts analog signals into digital signal, sends digital amplifying unit for the digital signal, number
Word amplifying unit carries out secondary amplification to sound source signal.
After carrying out level-one amplification by electron tube analogue amplifier, so that the tone color sound of active audio amplifier is very gentle, it is rich
Charm, the volume of active audio amplifier can effectively be reduced by carrying out secondary amplification by digital amplifying unit, and circuit is simple, performance is excellent
More, defencive function is complete.
It further include main control unit in the present embodiment, the input of the output end of the main control unit and the digital amplifying unit
End connection, main control unit are also used to include the work such as electrifying timing sequence, initialization, Active crossover, automatic protection.
Power supply unit be used for for the bluetooth power amplifier unit, the electron tube Simulation scale-up unit, the AD conversion unit,
The main control unit and the digital amplifying unit power supply.
Wherein power supply is Switching Power Supply, has power management function, receives exchange 90V~240V voltage input, exportable
5V standby voltage, 6.3V, 150V and 20V voltage, provide operating voltage for each unit, have Power on/off control system,
Main power mode is exported including L standby mode and H, to realize energy conservation.
It further include USB interface and AUX interface in the present embodiment, the USB interface is electrically connected with the bluetooth power amplifier unit,
The AUX interface is electrically connected with the bluetooth power amplifier unit.
Bluetooth power amplifier unit is integrated with the controller of 2.0 interface of full speed USB, can be used for realizing that circumscribed USB connects
Jaws equipment, while can be used for the debugging upgrade interface of system equipment, facilitate debugging.AUX interface facilitates user to play external sound
Source signal.
Audio signal from bluetooth receiving module or USB interface or AUX interface is ADC/ through bluetooth power amplifier unit
After the processing such as DAC, then it is input to electron tube Simulation scale-up unit and carries out the processing of prime Simulation scale-up, output simulation L/R source of sound letter
Number.
The L/R sound source signal received is converted into digital I by digital amplifying unit2S signal source, main control unit carry out number
Processing, while it being divided into the high pitch amplifying unit that high, normal, basic three audio sections are separately input to digital amplifying unit, middle pitch amplification
Unit and the amplification output of bass amplifying unit, gross output 80W.
It further include LED light (not shown) in the present embodiment, when active audio amplifier is in open state, indicator light
It is displayed in white, when active audio amplifier is in standby, indicator light is shown as orange, refers to when active audio amplifier is in off-mode
Show that lamp is shown in red.
Main control unit control active audio amplifier is in: booting, suspend mode and standby three kinds of working conditions, after active audio amplifier booting,
(the present embodiment is 15 minutes) system enters dormant state after preset time, can automatically wake up, under standby mode, can not call out automatically
It wakes up.
When having, when accessing signal in Bluetooth signal connection or USB interface or AUX interface, system is called out under dormant state
It wakes up.
As shown in figure 3, specifically, AD conversion unit described in the present embodiment includes PCM 1860DBTR chip, simulated sound
What sound signal AUDIO_L+, AUDIO_R+, AUDIO_L-, AUDIO_R- were separately input to PCM 1860DBTR chip 27~30 draws
Foot exports from 15~18 pins after processing, is denoted as MASK, BT_I2S_LRCK, BT_I2S_BCK, BT_I2S_SDO.
Specifically, main control unit described in the present embodiment includes STM320 series monolithic.
As shown in figure 4, specifically, number amplifying unit described in this example includes NTP8204 chip, audio digital signal
BT_I2S_SDO, BT_I2S_LRCK, BT_I2S_BCK are separately connected 3,4,5 ports of NTP8204 chip, distinguish after processing
From OUT1A1, OUT1B1, OUT2A1 and OUT2B2 pin output sound amplified signal Tweeter_L+, Tweeter_L-,
Tweeter_R+、Tweeter_R-。
It is to be illustrated to the preferable implementation of the utility model, but the invention is not limited to the reality above
Example is applied, those skilled in the art can also make various equivalent variations without departing from the spirit of the present invention
Or replacement, these equivalent deformations or replacement are all included in the scope defined by the claims of the present application.
Claims (9)
1. a kind of active audio amplifier characterized by comprising bluetooth power amplifier unit, electron tube Simulation scale-up unit, AD conversion list
Member, digital amplifying unit and loudspeaker, the output end of the bluetooth power amplifier unit connect the electron tube Simulation scale-up unit
Input terminal, the output end of the electron tube Simulation scale-up unit connect the input terminal of the AD conversion unit, the AD conversion list
The output end of member connects the input terminal of the digital amplifying unit, and the output end of the number amplifying unit connects the loudspeaker
Input terminal.
2. a kind of active audio amplifier according to claim 1, which is characterized in that it further include main control unit, the main control unit
Output end connect with the input terminal of the digital amplifying unit.
3. a kind of active audio amplifier according to claim 2, which is characterized in that it further include power supply unit, the power supply unit
For for the bluetooth power amplifier unit, the electron tube Simulation scale-up unit, the AD conversion unit, the main control unit and institute
State digital amplifying unit power supply.
4. a kind of active audio amplifier according to claim 1, which is characterized in that further include USB interface, the USB interface with
The bluetooth power amplifier unit electrical connection.
5. a kind of active audio amplifier according to claim 1, which is characterized in that further include AUX interface, the AUX interface with
The bluetooth power amplifier unit electrical connection.
6. a kind of active audio amplifier according to claim 1, which is characterized in that the number amplifying unit includes high pitch amplification
Unit, middle pitch amplifying unit and bass amplifying unit.
7. a kind of active audio amplifier according to claim 1, which is characterized in that the AD conversion unit includes
PCM1860DBTR chip.
8. a kind of active audio amplifier according to claim 2, which is characterized in that the main control unit includes that STM320 series is single
Piece machine.
9. a kind of active audio amplifier according to claim 1, which is characterized in that the number amplifying unit includes NTP8204
Chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920402466.2U CN209545858U (en) | 2019-03-27 | 2019-03-27 | A kind of active audio amplifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920402466.2U CN209545858U (en) | 2019-03-27 | 2019-03-27 | A kind of active audio amplifier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209545858U true CN209545858U (en) | 2019-10-25 |
Family
ID=68275711
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920402466.2U Active CN209545858U (en) | 2019-03-27 | 2019-03-27 | A kind of active audio amplifier |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209545858U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109905809A (en) * | 2019-03-27 | 2019-06-18 | 深圳市火乐科技发展有限公司 | A kind of active audio amplifier |
-
2019
- 2019-03-27 CN CN201920402466.2U patent/CN209545858U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109905809A (en) * | 2019-03-27 | 2019-06-18 | 深圳市火乐科技发展有限公司 | A kind of active audio amplifier |
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