CN207235089U - A kind of audio playing circuit and electronic toy - Google Patents
A kind of audio playing circuit and electronic toy Download PDFInfo
- Publication number
- CN207235089U CN207235089U CN201720911445.4U CN201720911445U CN207235089U CN 207235089 U CN207235089 U CN 207235089U CN 201720911445 U CN201720911445 U CN 201720911445U CN 207235089 U CN207235089 U CN 207235089U
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- CN
- China
- Prior art keywords
- power amplifier
- switch
- audio playing
- playing circuit
- output terminal
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Abstract
The utility model, which provides a kind of audio playing circuit and electronic toy, the circuit, to be included：MCU, first switch, the first power amplifier, the second power amplifier, feedback device and loudspeaker；Wherein, the first output terminal of the MCU is connected with the first end of the first switch, the second end of the first switch is connected with the input terminal of first power amplifier, 3rd end of the first switch is connected with the input terminal of second power amplifier, the one end of the output terminal of first power amplifier and the second power amplifier with the loudspeaker is connected, the other end ground connection of the loudspeaker, the collection terminal of the feedback device is connected with the output terminal of first power amplifier, and output terminal of the collection terminal of the feedback device also with second power amplifier is connected, the feedback end of the feedback device is connected with the feedback end of the MCU.Electronic toy audio result of broadcast can be improved.
Description
Technical field
It the utility model is related to electronic toy technical field, more particularly to a kind of audio playing circuit and electronic toy.
Background technology
With the development of electronic toy, the function of electronic toy is more and more perfect, such as：Electronic toy is often supported to play
Audio-frequency function.Wherein, audio playing circuit, often there are power amplifier, to being amplified with audio signal to be played.But
In practical application it is possible that power amplifier failure possibility, such as：Power amplifier breaks down, and so results in
Electronic toy audio result of broadcast is poor.
Utility model content
The utility model provides a kind of audio playing circuit and electronic toy, poor to solve electronic toy audio result of broadcast
The problem of.
The utility model provides a kind of audio playing circuit, including：
Micro-control unit (Microcontroller Unit, MCU), first switch, the first power amplifier, the second power
Amplifier, feedback device and loudspeaker；
Wherein, the first output terminal of the MCU is connected with the first end of the first switch, and the second of the first switch
End is connected with the input terminal of first power amplifier, the 3rd end and second power amplifier of the first switch
Input terminal connects, and the output terminal of first power amplifier and the second power amplifier connects with one end of the loudspeaker
Connect, the other end ground connection of the loudspeaker, the collection terminal of the feedback device and the output terminal of first power amplifier connect
Connect, and output terminal of the collection terminal of the feedback device also with second power amplifier is connected, the feedback device it is anti-
Feedback end is connected with the feedback end of the MCU.
Preferably, the feedback device includes feedback resistance.
Preferably, the audio playing circuit further includes the first capacitance, and one end of first capacitance is opened with described first
The first end connection of pass, the other end ground connection of first capacitance.
Preferably, the audio playing circuit further includes the second capacitance, and the first end of second capacitance connects the MCU
Power input, and the first end of second capacitance is also connected with power supply, the second end ground connection of second capacitance.
Preferably, the audio playing circuit further includes second switch, the 3rd power amplifier and the 4th power amplifier；
Wherein, the second output terminal of the MCU is connected with the first end of the second switch, and the second of the second switch
End is connected with the input terminal of the 3rd power amplifier, the 3rd end and the 4th power amplifier of the second switch
Input terminal connects；
The audio playing circuit further includes the 3rd switch, the first end of the 3rd switch and first power amplification
The output terminal connection of device, and the first end of the 3rd switch is connected with the output terminal of second power amplifier, described the
The second ends of three switches be connecteds with the output terminal of the 3rd power amplifier, and the described 3rd second end switched and described the
The output terminal connection of four power amplifiers, the 3rd end of the 3rd switch connect the collection terminal of the feedback device, and described
3rd end of the 3rd switch connects one end connection of the loudspeaker.
Preferably, the audio playing circuit further includes：Indicator light, described indicator light one end and the prompting end of the MCU
Connection, the other end ground connection of the indicator light.
Preferably, the audio playing circuit further includes：Memory, the output terminal of the memory are defeated with the MCU's
Enter end connection.
Preferably, the feedback resistance is 1000 ohm of resistance.
Preferably, first capacitance is the capacitance of 200 microfarads；
Second capacitance is the capacitance of 500 microfarads.
The utility model also provides a kind of electronic toy, including audio playing circuit provided by the utility model.
In the utility model, the first output terminal of the MCU is connected with the first end of the first switch, and described first opens
The second end of pass is connected with the input terminal of first power amplifier, the 3rd end and second power of the first switch
The input terminal connection of amplifier, the output terminal of first power amplifier and the second power amplifier with the loudspeaker
One end connects, the other end ground connection of the loudspeaker, and the collection terminal of the feedback device is defeated with first power amplifier
Outlet connects, and output terminal of the collection terminal of the feedback device also with second power amplifier is connected, the ultramagnifier
The feedback end of part is connected with the feedback end of the MCU.So can flexibly it be controlled using the first power amplification by first switch
Device or the second power amplifier are amplified audio signal, even if so which power amplifier failure, can use another
One is amplified, so as to improve electronic toy audio result of broadcast.
Brief description of the drawings
It is required in being described below to embodiment in order to illustrate more clearly of the technical scheme in the embodiment of the utility model
Attached drawing to be used is briefly described, it should be apparent that, drawings in the following description are only some realities of the utility model
Example is applied, for those of ordinary skill in the art, without creative efforts, can also be according to these attached drawings
Obtain other attached drawings.
Fig. 1 is a kind of structure diagram of audio playing circuit provided by the utility model；
Fig. 2 is the structure diagram of another audio playing circuit provided by the utility model；
Fig. 3 is the structure diagram of another audio playing circuit provided by the utility model；
Fig. 4 is the structure diagram of another audio playing circuit provided by the utility model；
Fig. 5 is the structure diagram of another audio playing circuit provided by the utility model；
Fig. 6 is the structure diagram of another audio playing circuit provided by the utility model.
Embodiment
The following is a combination of the drawings in the embodiments of the present utility model, and the technical scheme in the embodiment of the utility model is carried out
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are without creative efforts
All other embodiments obtained, shall fall within the protection scope of the present invention.
As shown in Figure 1, Fig. 1 is a kind of structure diagram of audio playing circuit provided by the utility model, which should
For electronic toy, as shown in Figure 1, audio playing circuit 100 includes：
MCU101, first switch 102, the first power amplifier 103, the second power amplifier 104,105 and of feedback device
Loudspeaker 106；
Wherein, the first output terminal of the MCU101 is connected with the first end of the first switch 102, the first switch
102 second end is connected with the input terminal of first power amplifier 103, the 3rd end of the first switch 102 with it is described
The input terminal connection of second power amplifier 104, the output of 103 and second power amplifier 104 of the first power amplifier
One end with the loudspeaker 106 is held to be connected, the other end ground connection of the loudspeaker 106, the collection of the feedback device 105
End be connected with the output terminal of first power amplifier 103, and the collection terminal of the feedback device 105 also with second work(
The output terminal connection of rate amplifier 104, the feedback end of the feedback device 105 are connected with the feedback end of the MCU101.
Wherein, above-mentioned first power amplifier 103 can be electronic toy Conventional power amplifiers, i.e., do not occurring exception
When the first end of first switch 102 and the second end of first switch 102 between be in the conduction state.When the first power amplifier
103 there is exception, such as：During failure, then the first end of first switch 102 and the second end of first switch 102 disconnect, and first opens
The first end of pass 102 is turned on the 3rd end of first switch 102, so that the second power amplifier 104 works, i.e., electronics is played
Tool is amplified using the second power amplifier 104 at this time, so as to avoid because the first power amplifier 103 fails, and
Cause electronic toy can not play audio.
Wherein, the operation principle of circuit can detect the first power amplifier 103 by above-mentioned feedback device 105
Working status, such as：When feedback device 105 is to MCU101 feedback audio signals, then the first power amplifier 103 can be determined
In normal operating conditions, first switch 102 is without switching herein；If feedback device 105 does not return to audio letter to MCU101
Number, such as：First power amplifier 103 fails, thus can not exports audio signal, feedback device 105 also can not just detect
Signal, and then determine that the first power amplifier 103 fails, so as to control the first end and first switch 102 of first switch 102
Second end disconnects, and the first end of first switch 102 is turned on the 3rd end of first switch 102 so that the second power amplifier 104
Work.Preferably, when MCU101 can be detection the first power amplifier 103 failure, switching life is transmitted to first switch 102
Order, first switch 102 are based on the switching command, control the second end of the first end and first switch 102 of first switch 102 to break
Open, the first end of first switch 102 is turned on the 3rd end of first switch 102.In addition, MCU101 by first switch 102 to
First power amplifier 103 or the second power amplifier 104 transmission audio signal, such as：Music.
In the utility model, if can realize that the first power amplifier 103 fails by foregoing circuit, can be controlled
Two power amplifiers 104 work, so as to improve the audio result of broadcast of electronic toy.
Preferably, the feedback device 105 includes feedback resistance.
In the utility model, realized by above-mentioned feedback resistance to the first power amplifier 103 and the second power amplifier
104 output signals feed back to MCU101, then MCU101 is controlled first switch 102 according to feedback signal.Due to the use of electricity
Resistance, so that audio playing circuit 100 is simple in structure, reduces the cost of electronic toy.
Preferably, above-mentioned feedback resistance is 1000 ohm of resistance.Certainly, this is not construed as limiting, such as：It can also be
500 ohm or 2000 ohm resistance etc..
Preferably, as shown in Fig. 2, the audio playing circuit 100 further includes the first capacitance 107, first capacitance 107
One end be connected with the first end of the first switch 102, the other end of first capacitance 107 ground connection.
In the utility model, by connecting the first capacitance 107 of a ground connection in the first end of first switch 102, so that
It can realize and the audio signal of MCU101 outputs is filtered, so as to further improve the audio result of broadcast of electronic toy.
Preferably, first capacitance 107 is the capacitance of 200 microfarads.Certainly, this is not construed as limiting, such as：It can also be
Capacitance of 100 microfarads or 500 microfarads etc..
Preferably, as shown in figure 3, the audio playing circuit 100 further includes the second capacitance 108, second capacitance 108
First end connect the power input of the MCU101, and the first end of second capacitance 108 is also connected with power supply, described the
The second end ground connection of two capacitances 108.
In the utility model, by connecting the second capacitance 108 of a ground connection in the power end of MCU101, so as to reality
Now the power supply signal of MCU101 inputs is filtered, so as to further improve the audio result of broadcast of electronic toy.
Preferably, second capacitance 108 is the capacitance of 500 microfarads.Certainly, this is not construed as limiting, such as：It can also be
Capacitance of 1000 microfarads or 800 microfarads etc..
Preferably, as shown in figure 4, the audio playing circuit 100, which further includes the audio playing circuit 100, further includes
Two the 109, the 3rd power amplifiers 110 of switch and the 4th power amplifier 111；
Wherein, the second output terminal of the MCU101 is connected with the first end of the second switch 109, the second switch
109 second end is connected with the input terminal of the 3rd power amplifier 110, the 3rd end of the second switch 109 with it is described
The input terminal connection of 4th power amplifier 111；
The audio playing circuit 100 further includes the 3rd switch 112, the first end and described the of the 3rd switch 112
The output terminal connection of one power amplifier 103, and the first end of the 3rd switch 112 and second power amplifier 104
Output terminal connection, the second end of the 3rd switch 112 is connected with the output terminal of the 3rd power amplifier 110, and institute
The second end for stating the 3rd switch 112 is connected with the output terminal of the 4th power amplifier 111, and the described 3rd switchs the of 112
Three ends connect the collection terminal of the feedback device 105, and the 3rd end of the 3rd switch 112 connects the loudspeaker 106
One end connects.
The utility model can be the first power amplifier 103 and when the second power amplifier 104 fails, and can pass through
The switch of second switch 109 and the 3rd 112 is coordinated, control the 3rd power amplifier 110 or the 4th power amplifier 111 into
Row work.Such as：The first end of 3rd switch 112 and the 3rd end of the 3rd switch 112 disconnect, the second end of the 3rd switch 112
Turned on the 3rd end of the 3rd switch 112, and the first end of second switch 109 is turned on the second end of second switch 109, or
The first end of second switch 109 is turned on the 3rd end of second switch 109.In addition, above-mentioned second switch 109 can be passed through
The switching command of MCU101 transmission carries out state switching, and the 3rd switch 112 can be user's control.
The audio result of broadcast of electronic toy can be further improved by foregoing circuit, because electronic toy is often small
Child plays, and during child's object for appreciation, it is easily damaged audio-frequency amplifier, the service life of the audio playing circuit 100 of such the utility model
Greatly increase.
Preferably, as shown in figure 5, the audio playing circuit 100 further includes：Indicator light 113, the indicator light 113 1
End is connected with the prompting end of the MCU101, the other end ground connection of the indicator light 113.
Wherein, above-mentioned indicator light 113 can be LDE lamps.
It can be realized by above-mentioned indicator light 113 and failed in the first power amplifier 103 and the second power amplifier 104
When, it can be indicated by the indicator light 113, to prompt user terminal to pass through 112 the 3rd power amplification of control of the 3rd switch
110 or the 4th power amplifier 111 of device works, to improve the performance of electronic toy.
Preferably, as shown in fig. 6, the audio playing circuit 100 further includes：Memory, the output of the memory 114
End is connected with the input terminal of the MCU101.
Wherein, above-mentioned memory 114 is used to store audio signal, such as：Music, can so further improve electronics object for appreciation
The audio result of broadcast of tool, because any audio that can be stored with playout storage 114.Certainly, in the utility model, do not include
What memory 114 also can be achieved on, such as：MCU101 exports specific pcm audio signal by power amplifier.Or
It can also be that MCU101 obtains audio etc. by other circuits of electronic toy, this utility model is not construed as limiting.
In the utility model, the first output terminal of the MCU is connected with the first end of the first switch, and described first opens
The second end of pass is connected with the input terminal of first power amplifier, the 3rd end and second work(of the first switch
The input terminal connection of rate amplifier, the output terminal of first power amplifier and the second power amplifier with the loudspeaker
One end connection, the other end ground connection of the loudspeaker, the collection terminal of the feedback device and first power amplifier
Output terminal connects, and output terminal of the collection terminal of the feedback device also with second power amplifier is connected, the feedback
The feedback end of device is connected with the feedback end of the MCU.It so can flexibly be controlled by first switch and be put using the first power
Big device or the second power amplifier are amplified audio signal, even if so which power amplifier failure, can use
Another is amplified, so as to improve electronic toy audio result of broadcast.
The utility model also provides a kind of electronic toy, including audio playing circuit provided by the utility model.
Above disclosed is only the utility model preferred embodiment, cannot limit the utility model with this certainly
Interest field, therefore equivalent variations made according to the utility model claims still belong to the scope that the utility model is covered.
Claims (10)
- A kind of 1. audio playing circuit, applied to electronic toy, it is characterised in that including：Micro-control unit MCU, first switch, the first power amplifier, the second power amplifier, feedback device and loudspeaker；Wherein, the first output terminal of the MCU is connected with the first end of the first switch, the second end of the first switch with The input terminal connection of first power amplifier, the 3rd end of the first switch and the input of second power amplifier End connection, the one end of the output terminal of first power amplifier and the second power amplifier with the loudspeaker are connected, institute The other end ground connection of loudspeaker is stated, the collection terminal of the feedback device is connected with the output terminal of first power amplifier, and Output terminal of the collection terminal of the feedback device also with second power amplifier is connected, the feedback end of the feedback device with The feedback end connection of the MCU.
- 2. audio playing circuit according to claim 1, it is characterised in that the feedback device includes feedback resistance.
- 3. audio playing circuit according to claim 1, it is characterised in that the audio playing circuit further includes the first electricity Hold, one end of first capacitance is connected with the first end of the first switch, the other end ground connection of first capacitance.
- 4. audio playing circuit according to claim 3, it is characterised in that the audio playing circuit further includes the second electricity Hold, the first end of second capacitance connects the power input of the MCU, and the first end of second capacitance is also connected with electricity Source, the second end ground connection of second capacitance.
- 5. audio playing circuit according to claim 4, it is characterised in that the audio playing circuit further includes second and opens Pass, the 3rd power amplifier and the 4th power amplifier；Wherein, the second output terminal of the MCU is connected with the first end of the second switch, the second end of the second switch with The input terminal connection of 3rd power amplifier, the 3rd end of the second switch and the input of the 4th power amplifier End connection；The audio playing circuit further includes the 3rd switch, the first end of the 3rd switch and first power amplifier Output terminal connects, and the first end of the 3rd switch is connected with the output terminal of second power amplifier, and the described 3rd opens The second end of pass is connected with the output terminal of the 3rd power amplifier, and the second end of the 3rd switch and the 4th work( The output terminal connection of rate amplifier, the 3rd end of the 3rd switch connect the collection terminal of the feedback device, and the described 3rd 3rd end of switch connects one end connection of the loudspeaker.
- 6. audio playing circuit according to claim 5, it is characterised in that the audio playing circuit further includes：Indicator light, Described indicator light one end is connected with the prompting end of the MCU, the other end ground connection of the indicator light.
- 7. audio playing circuit according to claim 6, it is characterised in that the audio playing circuit further includes：Memory, The output terminal of the memory is connected with the input terminal of the MCU.
- 8. audio playing circuit according to claim 2, it is characterised in that the feedback resistance is 1000 ohm of resistance.
- 9. audio playing circuit according to claim 4, it is characterised in that first capacitance is the capacitance of 200 microfarads；Second capacitance is the capacitance of 500 microfarads.
- 10. a kind of electronic toy, it is characterised in that including audio playing circuit as claimed in any one of claims 1-9 wherein.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720911445.4U CN207235089U (en) | 2017-07-25 | 2017-07-25 | A kind of audio playing circuit and electronic toy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720911445.4U CN207235089U (en) | 2017-07-25 | 2017-07-25 | A kind of audio playing circuit and electronic toy |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207235089U true CN207235089U (en) | 2018-04-13 |
Family
ID=61854877
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720911445.4U Expired - Fee Related CN207235089U (en) | 2017-07-25 | 2017-07-25 | A kind of audio playing circuit and electronic toy |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207235089U (en) |
-
2017
- 2017-07-25 CN CN201720911445.4U patent/CN207235089U/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: 20180413 Termination date: 20190725 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |