CN209402715U - A kind of audio power amplifier circuit - Google Patents
A kind of audio power amplifier circuit Download PDFInfo
- Publication number
- CN209402715U CN209402715U CN201920428986.0U CN201920428986U CN209402715U CN 209402715 U CN209402715 U CN 209402715U CN 201920428986 U CN201920428986 U CN 201920428986U CN 209402715 U CN209402715 U CN 209402715U
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- Prior art keywords
- circuit
- power amplifier
- signal processing
- digital signal
- connect
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Abstract
The utility model relates to player audio power amplifier technical fields, especially a kind of audio power amplifier circuit, including voltage-stabilized power supply circuit, digital signal processing circuit, power amplifier, start-up circuit, the output end of the voltage-stabilized power supply circuit is connect with the input terminal of the input terminal of the digital signal processing circuit and the power amplifier, the output end of the digital signal processing circuit is connect with the input terminal of the power amplifier, and the output end of the start-up circuit is connect with the input terminal of the digital signal processing circuit；The utility model passes through a kind of audio power amplifier circuit, the route of power board is greatly simplified using single supply power supply and enhances the stability and reliability of product, embedded digital signal processing circuit tuning, and it is compensated automatically with audio, sound quality is purer, and signal-to-noise ratio is greatly enhanced, and effectively optimizes the performance of machine system, true reduction bass is genuine, and effect is more intrepid.
Description
Technical field
The utility model relates to player audio power amplifier technical field, especially a kind of audio power amplifier circuit.
Background technique
The audio power amplifier circuit of current vehicle-mounted alarm device is all made of analog amplifier circuit, and there are four big disadvantages for analog amplifier:
First is that since power tube is in linear working state, power consumption is big, calorific value is high, it is easily damaged, and power consumption is also big；
Two traditional power amplifier designs are that the design of dual power supply power amplifier route needs to boost by transformer after connecting 12V battery
Power supply is used for power amplification, and due to the limitation of route, efficiency conversion is lower, and a large amount of battery power consumption loss is caused to distribute in heat
On, sound equipment can give out a large amount of heat when starting；
Third is that traditional vehicle active cabinet subwoofer uses traditional preceding pole analogue audio frequency process circuit, can not accomplish to be directed to
The accurate tuning of different frequency range, sound quality perfect can not embody, and when volume is output to maximum value, the voltage waveform of loudspeaker be pushed to be
Square wave acts on the mutually not disorderly conjunction of force request with voice coil vibrations, so that extra electric energy is lost and is generated heat in voice coil, reduce loudspeaker
Service life；
Fourth is that the load of traditional power amplifier is generally 1 OHM-8 OHM, special radiator is needed.
Summary of the invention
In view of the above-mentioned deficiencies in the prior art, the purpose of this utility model is to provide a kind of audio frequency power amplifier electricity
Road.
To achieve the goals above, the utility model adopts the following technical solution:
A kind of audio power amplifier circuit, it is characterised in that: including voltage-stabilized power supply circuit, digital signal processing circuit, power amplifier electricity
Road, start-up circuit, the input terminal and the power amplifier of the output end of the voltage-stabilized power supply circuit and the digital signal processing circuit
The input terminal of circuit connects, and the output end of the digital signal processing circuit is connect with the input terminal of the power amplifier, described
The output end of start-up circuit is connect with the input terminal of the digital signal processing circuit.
Preferably, the voltage-stabilized power supply circuit uses a fixed frequency current mode controller chip.
Preferably, the digital signal processing circuit is sequentially connected by six amplifying circuits and is formed.
Preferably, it is additionally provided with a constant-current power supply circuit, the constant-current power supply circuit and Digital Signal Processing electricity
Road connection.
Preferably, it is additionally provided with a controller, and the first pin of the controller is connect with the power amplifier.
Preferably, it is additionally provided with a LED light, and the LED light is connect with the controller.
Preferably, it is additionally provided with a protection circuit, the protection circuit and the voltage regulator circuit, constant-current supply electricity
Road, the power amplifier are connected with the controller.
Preferably, the power amplifier is made of an amplifying circuit and two half-bridge gate drive circuits.
Using the above scheme, the beneficial effects of the utility model are:
The utility model greatly simplifies the route of power board by a kind of audio power amplifier circuit, using single supply power supply
And enhance the stability and reliability of product, embedded digital signal processing circuit tuning, and compensated automatically with audio, sound quality is more
Pure, signal-to-noise ratio is greatly enhanced, and effectively optimizes the performance of machine system, the true bass that restores is genuine, effect
It is more intrepid.
Detailed description of the invention
Fig. 1 is the schematic diagram of the audio power amplifier circuit of the utility model；
Fig. 2 is the circuit diagram of the voltage-stabilized power supply circuit of the audio power amplifier circuit of the utility model；
Fig. 3 is the circuit diagram of the digital signal processing circuit of the audio power amplifier circuit of the utility model；
Fig. 4 is the circuit diagram of the power amplifier of the audio power amplifier circuit of the utility model；
Fig. 5 is the circuit diagram of the start-up circuit of the audio power amplifier circuit of the utility model；
Fig. 6 is the circuit diagram of the constant-current power supply circuit of the audio power amplifier circuit of the utility model；
Fig. 7 is the circuit diagram of the controller of the audio power amplifier circuit of the utility model；
Fig. 8 is the circuit diagram of the LED light of the audio power amplifier circuit of the utility model；
Fig. 9 is the circuit diagram of the protection circuit of the audio power amplifier circuit of the utility model.
Specific embodiment
The embodiments of the present invention are described in detail below in conjunction with attached drawing, but the utility model can be by right
It is required that the multitude of different ways for limiting and covering is implemented.
As shown in Figures 1 to 5, a kind of audio power amplifier circuit, including voltage-stabilized power supply circuit, digital signal processing circuit, function
It discharges road, start-up circuit, the input terminal of the output end of the voltage-stabilized power supply circuit and the digital signal processing circuit and described
The input terminal of power amplifier connects, and the output end of the digital signal processing circuit is connect with the input terminal of the power amplifier,
The output end of the start-up circuit is connect with the input terminal of the digital signal processing circuit.
In the utility model preferred embodiment, the utility model using single supply 12V battery directly power without
Additional Switching Power Supply part greatly simplifies the route of power board and enhances the stability and reliability of product, and sound quality is more
Add pure, signal-to-noise ratio is greatly enhanced, and more efficiently reduces extra cost.
In the utility model preferred embodiment, voltage-stabilized power supply circuit uses a fixed frequency current mode controller core
4th pin of piece, fixed frequency Controlled in Current Mode and Based chip is connect with the base stage of a triode, fixed frequency current-mode control
6th pin of coremaking piece is connect with the base stage of another triode, and on the input terminal and pcb board of voltage-stabilized power supply circuit
The connection of three connectors.
In the utility model preferred embodiment, digital signal processing circuit is sequentially connected by six amplifiers and is formed, number
The input terminal of word signal processing circuit is connect with jack, and digital signal processing circuit links together with controller.
As shown in fig. 6, audio power amplifier circuit is additionally provided with constant-current supply electricity in the utility model preferred embodiment
Road, constant-current power supply circuit are connect with digital signal processing circuit, and constant-current power supply circuit is connect with voltage-stabilized power supply circuit.
As shown in fig. 7, audio power amplifier circuit is additionally provided with a controller in the utility model preferred embodiment, control
First pin of device is connect with power amplifier, and the third pin of controller is connect with LED light, the 18th pin of controller
Connection protection circuit, the 20th pin of controller are also connect with the third connector on pcb board.
As shown in figure 8, audio power amplifier circuit is additionally provided with a LED light in the utility model preferred embodiment,
LED light is connect with controller, and LED light is connect with the first connector on pcb board.
As shown in figure 9, audio power amplifier circuit is additionally provided with a protection circuit in the utility model preferred embodiment, protect
The output end of protection circuit is connect with the input terminal of voltage regulator circuit, constant-current power supply circuit, power amplifier and controller, protects circuit
Input terminal is connect with the second connector on pcb board.
The above is only the preferred embodiments of the utility model, and therefore it does not limit the scope of the patent of the utility model, all
Equivalent structure or equivalent flow shift made based on the specification and figures of the utility model, is applied directly or indirectly in
Other related technical areas similarly include the scope of patent protection in the utility model.
Claims (8)
1. a kind of audio power amplifier circuit, it is characterised in that: including voltage-stabilized power supply circuit, digital signal processing circuit, power amplifier,
Start-up circuit, the input terminal and the power amplifier of the output end of the voltage-stabilized power supply circuit and the digital signal processing circuit
Input terminal connection, the output end of the digital signal processing circuit connect with the input terminal of the power amplifier, the starting
The output end of circuit is connect with the input terminal of the digital signal processing circuit.
2. a kind of audio power amplifier circuit as described in claim 1, it is characterised in that: the voltage-stabilized power supply circuit is fixed using one
Frequency current mode controller chip.
3. a kind of audio power amplifier circuit as described in claim 1, it is characterised in that: the digital signal processing circuit is by six
Amplifying circuit is sequentially connected composition.
4. a kind of audio power amplifier circuit as described in claim 1, it is characterised in that: it is additionally provided with a constant-current power supply circuit,
The constant-current power supply circuit is connect with the digital signal processing circuit.
5. a kind of audio power amplifier circuit as described in claim 1, it is characterised in that: it is additionally provided with a controller, the control
First pin of device processed is connect with the power amplifier.
6. a kind of audio power amplifier circuit as described in claim 1, it is characterised in that: it is additionally provided with a LED light, described
LED light is connect with the controller.
7. a kind of audio power amplifier circuit as described in claim 1, it is characterised in that: it is additionally provided with a protection circuit, described
Protection circuit is connect with the voltage regulator circuit, the constant-current power supply circuit, the power amplifier and the controller.
8. a kind of audio power amplifier circuit as described in claim 1, it is characterised in that: the power amplifier by an amplifying circuit and
Two half-bridge gate drive circuit compositions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920428986.0U CN209402715U (en) | 2019-04-01 | 2019-04-01 | A kind of audio power amplifier circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920428986.0U CN209402715U (en) | 2019-04-01 | 2019-04-01 | A kind of audio power amplifier circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209402715U true CN209402715U (en) | 2019-09-17 |
Family
ID=67900167
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920428986.0U Expired - Fee Related CN209402715U (en) | 2019-04-01 | 2019-04-01 | A kind of audio power amplifier circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209402715U (en) |
-
2019
- 2019-04-01 CN CN201920428986.0U patent/CN209402715U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190917 Termination date: 20210401 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |