CN208386891U - A kind of Portable voice frequency amplifying device - Google Patents
A kind of Portable voice frequency amplifying device Download PDFInfo
- Publication number
- CN208386891U CN208386891U CN201820331193.2U CN201820331193U CN208386891U CN 208386891 U CN208386891 U CN 208386891U CN 201820331193 U CN201820331193 U CN 201820331193U CN 208386891 U CN208386891 U CN 208386891U
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Abstract
The utility model discloses a kind of Portable voice frequency amplifying devices, belong to electronic circuit technology field.Including shell, audio amplifier circuit, rechargeable battery and charging circuit are equipped in shell, shell is equipped with input terminal and output end；Input terminal is connect with change-over switch, and change-over switch is connect with audio amplifier circuit and charging circuit；The audio amplifier circuit includes indicating circuit and power filtering capacitor C11, and audio-frequency amplifier IC1 for original audio signal to be carried out to power amplification and is used to for the audio signal after power amplification being reduced to the dual-channel audio playing circuit that binaural sound signal plays out.The utility model have it is compact-sized, it is small in size, it is easy to carry, acoustical quality is good the advantages that.
Description
Technical field
The utility model relates to a kind of electric signal amplifying devices, more particularly to a kind of Portable voice frequency amplifying device.
Background technique
The players such as existing MP3, MP4 need to rebuild input on the output element for generating sound by audio-frequency amplifier
Audio signal increasingly liked by people along with feature small in size and easy to carry.But due to these players
Sound output it is too small, so bass and high pitch effect are not satisfactory.
As in the prior art, number of patent application is " CN201020677736.X ", and the applying date is on December 23rd, 2010, name
A kind of referred to as Chinese utility model patent document of " Portable voice frequency amplifying device ", technical solution are as follows: a kind of portable audio
Frequency amplifying device.Including shell, audio amplifier circuit, rechargeable battery and charging circuit are equipped in shell, shell is equipped with input
Socket and earphone socket；Input socket is connect with change-over switch, and change-over switch is connect with audio amplifier circuit and charging circuit.
For above-mentioned utility model patent by charging circuit in conjunction with audio amplifier circuit, built-in rechargeable battery can be repeatedly electricity
Pond charging removes frequently bothering for replacement battery from, reduces use cost to a certain extent, but its audio amplifier circuit cannot be filtered
The interference signals such as harmonic wave contained in power supply are gone, the distortion of sound is be easy to cause and generate more noise.
Utility model content
The utility model aims to solve the problem that the disadvantages of audio amplification device is easily distorted, noise is big in the prior art, proposes one kind
Sound quality is higher, Portable voice frequency amplifying device with dual-channel audio amplifying circuit,
In order to achieve the above-mentioned object of the invention, the technical solution of the utility model is as follows:
A kind of Portable voice frequency amplifying device, including shell, shell is interior to be equipped with audio amplifier circuit, rechargeable battery and charging
Circuit, shell are equipped with input terminal and output end；Input terminal is connect with change-over switch, change-over switch and audio amplifier circuit and is filled
Electric circuit connection；The audio amplifier circuit includes indicating circuit and power filtering capacitor C11, and for believing original audio
Number carry out power amplification audio-frequency amplifier IC1 and for the audio signal after power amplification to be reduced to binaural sound
The dual-channel audio playing circuit that signal plays out, the indicating circuit and power filtering capacitor C11 are in parallel, the power supply filter
Wave one end capacitor C11 is connected by the anode of switch K1 and rechargeable battery, and the other end of power filtering capacitor C11 and charging electricity
The cathode in pond connects, and the audio-frequency amplifier IC1 connection dual-channel audio playing circuit and front end input circuit, the front end are defeated
Entering circuit includes the first sound channel input circuit and second sound channel input circuit, and the first sound channel input circuit is connected to audio and puts
On 5 feet and 6 feet of big device IC1；The second sound channel input circuit is connected on 7 feet and 8 feet of audio-frequency amplifier IC1；It is described
Capacitor C11 uses electrolytic capacitor, and 2 feet of positive terminal connection audio-frequency amplifier IC1；The cathode of the rechargeable battery connects audio
4 feet of amplifier IC1, the dual-channel audio playing circuit include that the first channel audio playing circuit and second sound channel audio are broadcast
Electric discharge road, 3 feet of the first channel audio playing circuit connection audio-frequency amplifier IC1, the second sound channel audio play electricity
2 feet of road connection audio-frequency amplifier IC1.
The first channel audio playing circuit includes resistance R3, capacitor C8, capacitor C7 and loudspeaker RA, the loudspeaker
One end of RA is connect by capacitor C8 with 1 foot of audio-frequency amplifier IC1, and the other end of the loudspeaker RA passes through capacitor C7 and electricity
Resistance R3 is connect with 1 foot of audio-frequency amplifier IC1.
The second sound channel audio playing circuit includes resistance R4, capacitor C10, capacitor C9 and loudspeaker RB, the loudspeaking
One end of device RB is connect by capacitor C10 with 3 feet of audio-frequency amplifier IC1, and the other end of the loudspeaker RB passes through capacitor C9
And resistance R4 is connect with 3 feet of audio-frequency amplifier IC1.
The indicating circuit includes sequentially connected LED and resistance R5, and the cathode of resistance R5 and rechargeable battery connects,
The anode of LED is connected by the anode of switch K1 and rechargeable battery.
The change-over switch is commutator, and the midpoint of change-over switch is connect with rechargeable battery anode, the two of change-over switch
A transfer point one is connect with charging circuit, another connect with audio amplifier circuit.
The shell is equipped with volume adjustment device, and volume adjustment device is connect with audio amplifier circuit.
The shell is equipped with screw branch pipe, and shell is connect through the screw in screw branch pipe with cap.
The cap is equipped with charging indicator light and work light, and charging indicator light is connect through conducting wire with charging circuit；
Work light is connect through conducting wire with the indicating circuit in audio amplifier circuit.
The beneficial effects of the utility model are as follows:
(1) the utility model is compact-sized, small in size, easy to carry；
(2) the utility model, when carrying out audio amplification, can be effectively filtered out by charging circuit in conjunction with audio amplifier circuit
The interference signals such as harmonic wave contained in provided power supply, and there is the observation whether normal function of charging in real time；
(3) the utility model carries out charging by change-over switch and magnifying state is converted, and change-over switch is located at charged state
When, audio amplifier circuit is disconnected, input terminal can access power supply and charge to rechargeable battery.Change-over switch is located at magnifying state
When, input terminal is connect with signal source, disconnects charging circuit.Prevent high current from damaging audio amplifier circuit, use is safe, reliably；
(4) the utility model amplifies small audio signal, and is reduced to voice signal, and specially designed tool
There is the audio amplifier circuit of two-channel function, energy high-fidelity, the amplifying received audio signal of high-gain are reduced to sound
Sound signal, entire circuit have the structurally simple, economical characteristics such as practical, can get stereo sound yupin effect.
Detailed description of the invention
Fig. 1 is the outline structural diagram of the utility model；
Fig. 2 is the audio amplifier circuit schematic diagram in the utility model；
Fig. 3 is the charging indication in the utility model；
Wherein, 1, shell；2, audio amplifier circuit；3, rechargeable battery；4, charging circuit；5, input terminal；6, output end；7,
Change-over switch；8, volume adjustment device；9, screw branch pipe；10, cap；11, charging indicator light；12, work light；13, it leads
Line.
Specific embodiment
The utility model is described in further detail below with reference to embodiment, but the embodiments of the present invention is not
It is limited to this.
Embodiment 1
Such as Fig. 1-3, a kind of Portable voice frequency amplifying device, including shell 1, shell 1 is interior to be equipped with audio amplifier circuit 2, fills
Battery 3 and charging circuit 4, shell 1 are equipped with input terminal 5 and output end 6；Input terminal 5 is connect with change-over switch 7, and conversion is opened
7 are closed to connect with audio amplifier circuit 2 and charging circuit 4；The audio amplifier circuit 2 includes indicating circuit and power filtering capacitor
C11, and audio-frequency amplifier IC1 for original audio signal to be carried out to power amplification and be used for will be after power amplification
Audio signal is reduced to the dual-channel audio playing circuit that binaural sound signal plays out, the indicating circuit and power supply filter
Wave capacitor C11 is in parallel, and the one end the power filtering capacitor C11 is connect by switch K1 with the anode of rechargeable battery 3, and power supply is filtered
The other end of wave capacitor C11 is connect with the cathode of rechargeable battery 3, and the audio-frequency amplifier IC1 connection dual-channel audio plays electricity
Road and front end input circuit, the front end input circuit includes the first sound channel input circuit and second sound channel input circuit, described
First sound channel input circuit is connected on 5 feet and 6 feet of audio-frequency amplifier IC1；The second sound channel input circuit is connected to sound
On 7 feet and 8 feet of audio amplifier IC1；The capacitor C11 uses electrolytic capacitor, and the 2 of positive terminal connection audio-frequency amplifier IC1
Foot；4 feet of the cathode connection audio-frequency amplifier IC1 of the rechargeable battery, the dual-channel audio playing circuit includes the first sound
Channel audio playing circuit and second sound channel audio playing circuit, the first channel audio playing circuit connect audio-frequency amplifier
3 feet of IC1,2 feet of the second sound channel audio playing circuit connection audio-frequency amplifier IC1.
When above-mentioned Portable voice frequency amplifying device carries out audio amplification, harmonic wave contained in provided power supply can be effectively filtered out
Etc. interference signals, and have in real time observation power supply whether normal function；To amplify small audio signal, and restore
For voice signal, and the specially designed audio amplifier circuit with two-channel function, can high-fidelity, high-gain will be received
To audio signal amplification be reduced to voice signal, entire circuit has the structurally simple, economical characteristics such as practical, can get solid
Sound yupin effect.
Embodiment 2
Such as Fig. 1-3, a kind of Portable voice frequency amplifying device, including shell 1, shell 1 is interior to be equipped with audio amplifier circuit 2, fills
Battery 3 and charging circuit 4, shell 1 are equipped with input terminal 5 and output end 6；Input terminal 5 is connect with change-over switch 7, and conversion is opened
7 are closed to connect with audio amplifier circuit 2 and charging circuit 4；The audio amplifier circuit includes indicating circuit and power filtering capacitor
C11, and audio-frequency amplifier IC1 for original audio signal to be carried out to power amplification and be used for will be after power amplification
Audio signal is reduced to the dual-channel audio playing circuit that binaural sound signal plays out, the indicating circuit and power supply filter
Wave capacitor C11 is in parallel, and the one end the power filtering capacitor C11 is connect by switch K1 with the anode of rechargeable battery 3, and power supply is filtered
The other end of wave capacitor C11 is connect with the cathode of rechargeable battery 3, and the audio-frequency amplifier IC1 connection dual-channel audio plays electricity
Road and front end input circuit, the front end input circuit includes the first sound channel input circuit and second sound channel input circuit, described
First sound channel input circuit is connected on 5 feet and 6 feet of audio-frequency amplifier IC1；The second sound channel input circuit is connected to sound
On 7 feet and 8 feet of audio amplifier IC1；The capacitor C11 uses electrolytic capacitor, and the 2 of positive terminal connection audio-frequency amplifier IC1
Foot；4 feet of the cathode connection audio-frequency amplifier IC1 of the rechargeable battery, the dual-channel audio playing circuit includes the first sound
Channel audio playing circuit and second sound channel audio playing circuit, the first channel audio playing circuit connect audio-frequency amplifier
3 feet of IC1,2 feet of the second sound channel audio playing circuit connection audio-frequency amplifier IC1.
The first channel audio playing circuit includes resistance R3, capacitor C8, capacitor C7 and loudspeaker RA, the loudspeaker
One end of RA is connect by capacitor C8 with 1 foot of audio-frequency amplifier IC1, and the other end of the loudspeaker RA passes through capacitor C7 and electricity
Resistance R3 is connect with 1 foot of audio-frequency amplifier IC1.
The second sound channel audio playing circuit includes resistance R4, capacitor C10, capacitor C9 and loudspeaker RB, the loudspeaking
One end of device RB is connect by capacitor C10 with 3 feet of audio-frequency amplifier IC1, and the other end of the loudspeaker RB passes through capacitor C9
And resistance R4 is connect with 3 feet of audio-frequency amplifier IC1.
The indicating circuit includes sequentially connected LED and resistance R5, and the cathode of resistance R5 and rechargeable battery connects,
The anode of LED is connect by switch K1 with the anode of rechargeable battery 3.
The LPA4809 that Chuan Lishuo Electronics Co., Ltd. of Shenzhen can be used in the audio-frequency amplifier referred in the utility model is bis-
Channel audio power amplifier realizes function to be achieved, or using two of Zhuhai Jie Li Semiconductor Co., Ltd
Method that AX8302 single channel audio power amplifier is arranged in parallel achievees the effect that the utility model.
Embodiment 3
Such as Fig. 1-3, a kind of Portable voice frequency amplifying device, including shell 1, shell 1 is interior to be equipped with audio amplifier circuit 2, fills
Battery 3 and charging circuit 4, shell 1 are equipped with input terminal 5 and output end 6；Input terminal 5 is connect with change-over switch 7, and conversion is opened
7 are closed to connect with audio amplifier circuit 2 and charging circuit 4；The audio amplifier circuit includes indicating circuit and power filtering capacitor
C11, and audio-frequency amplifier IC1 for original audio signal to be carried out to power amplification and be used for will be after power amplification
Audio signal is reduced to the dual-channel audio playing circuit that binaural sound signal plays out, the indicating circuit and power supply filter
Wave capacitor C11 is in parallel, and the one end the power filtering capacitor C11 is connect by switch K1 with the anode of rechargeable battery 3, and power supply is filtered
The other end of wave capacitor C11 is connect with the cathode of rechargeable battery 3, and the audio-frequency amplifier IC1 connection dual-channel audio plays electricity
Road and front end input circuit, the front end input circuit includes the first sound channel input circuit and second sound channel input circuit, described
First sound channel input circuit is connected on 5 feet and 6 feet of audio-frequency amplifier IC1；The second sound channel input circuit is connected to sound
On 7 feet and 8 feet of audio amplifier IC1；The capacitor C11 uses electrolytic capacitor, and the 2 of positive terminal connection audio-frequency amplifier IC1
Foot；4 feet of the cathode connection audio-frequency amplifier IC1 of the rechargeable battery, the dual-channel audio playing circuit includes the first sound
Channel audio playing circuit and second sound channel audio playing circuit, the first channel audio playing circuit connect audio-frequency amplifier
3 feet of IC1,2 feet of the second sound channel audio playing circuit connection audio-frequency amplifier IC1.
The first channel audio playing circuit includes resistance R3, capacitor C8, capacitor C7 and loudspeaker RA, the loudspeaker
One end of RA is connect by capacitor C8 with 1 foot of audio-frequency amplifier IC1, and the other end of the loudspeaker RA passes through capacitor C7 and electricity
Resistance R3 is connect with 1 foot of audio-frequency amplifier IC1.
The second sound channel audio playing circuit includes resistance R4, capacitor C10, capacitor C9 and loudspeaker RB, the loudspeaking
One end of device RB is connect by capacitor C10 with 3 feet of audio-frequency amplifier IC1, and the other end of the loudspeaker RB passes through capacitor C9
And resistance R4 is connect with 3 feet of audio-frequency amplifier IC1.
The indicating circuit includes sequentially connected LED and resistance R5, and the cathode of resistance R5 and rechargeable battery connects,
The anode of LED is connect by switch K1 with the anode of rechargeable battery 3.
The change-over switch 7 is commutator, and the midpoint of change-over switch 7 is connect with 3 anode of rechargeable battery, change-over switch 7
Two transfer points one connect with charging circuit 4, another connect with audio amplifier circuit 2.
The shell is equipped with volume adjustment device 8, and volume adjustment device 8 is connect with audio amplifier circuit 2.
The shell is equipped with screw branch pipe 9, and shell is connect through the screw in screw branch pipe 9 with cap 10.
The cap is equipped with charging indicator light 11 and work light 12, and charging indicator light 11 is through conducting wire 13 and charging electricity
Road 4 connects；Work light 12 is connect through conducting wire 13 with the indicating circuit in audio amplifier circuit 2.
The above is only the preferred embodiment of the utility model, not does limit in any form to the utility model
System, any simple modification made by the above technical examples according to the technical essence of the present invention, equivalent variations, each falls within
Within the protection scope of the utility model.
Claims (7)
1. a kind of Portable voice frequency amplifying device, including shell (1), it is characterised in that: be equipped with audio amplifier circuit in shell (1)
(2), rechargeable battery (3) and charging circuit (4), shell (1) are equipped with input terminal (5) and output end (6)；Input terminal 5 and conversion
(7) connection is switched, change-over switch (7) is connect with audio amplifier circuit (2) and charging circuit (4)；The audio amplifier circuit (2)
Including indicating circuit and power filtering capacitor C11, and the audio-frequency amplifier for original audio signal to be carried out to power amplification
It IC1 and is broadcast for the audio signal after power amplification to be reduced to the dual-channel audio that binaural sound signal plays out
Discharge road, the indicating circuit and power filtering capacitor C11 are in parallel, the one end the power filtering capacitor C11 by switch K1 and
The anode connection of rechargeable battery (3), and the other end of power filtering capacitor C11 is connect with the cathode of rechargeable battery (3), the sound
Audio amplifier IC1 connection dual-channel audio playing circuit and front end input circuit, the front end input circuit include the first sound channel
Input circuit and second sound channel input circuit, the first sound channel input circuit are connected to 5 feet and 6 feet of audio-frequency amplifier IC1
On；The second sound channel input circuit is connected on 7 feet and 8 feet of audio-frequency amplifier IC1；The capacitor C11 is using electrolysis electricity
Hold, and 2 feet of positive terminal connection audio-frequency amplifier IC1；4 feet of the cathode connection audio-frequency amplifier IC1 of the rechargeable battery, institute
Stating dual-channel audio playing circuit includes the first channel audio playing circuit and second sound channel audio playing circuit, first sound
Channel audio playing circuit connects 3 feet of audio-frequency amplifier IC1, and the second sound channel audio playing circuit connects audio-frequency amplifier
2 feet of IC1, the indicating circuit includes sequentially connected LED and resistance R5, and resistance R5 and the cathode of rechargeable battery (3) connect
It connects, the anode of LED is connect by switch K1 with the anode of rechargeable battery (3).
2. Portable voice frequency amplifying device according to claim 1, it is characterised in that: first channel audio plays electricity
Road includes that one end of resistance R3, capacitor C8, capacitor C7 and loudspeaker RA, the loudspeaker RA pass through capacitor C8 and audio-frequency amplifier
1 foot of IC1 connects, and the other end of the loudspeaker RA is connect by capacitor C7 and resistance R3 with 1 foot of audio-frequency amplifier IC1.
3. Portable voice frequency amplifying device according to claim 1, it is characterised in that: the second sound channel audio plays electricity
Road includes that one end of resistance R4, capacitor C10, capacitor C9 and loudspeaker RB, the loudspeaker RB are amplified by capacitor C10 and audio
3 feet of device IC1 connect, and the other end of the loudspeaker RB is connected by 3 feet of capacitor C9 and resistance R4 and audio-frequency amplifier IC1
It connects.
4. Portable voice frequency amplifying device according to claim 1, it is characterised in that: the change-over switch (7) is double-throw
The midpoint of switch, change-over switch (7) is connect with rechargeable battery (3) anode, two transfer points of change-over switch (7) one and charging
Circuit (4) connection, another connect with audio amplifier circuit (2).
5. Portable voice frequency amplifying device according to claim 1, it is characterised in that: the shell (1) is equipped with volume
Regulating device (8), volume adjustment device (8) are connect with audio amplifier circuit (2).
6. Portable voice frequency amplifying device according to claim 1, it is characterised in that: the shell (1) is equipped with screw
Branch pipe (9), shell are connect through the screw in screw branch pipe (9) with cap (10).
7. Portable voice frequency amplifying device according to claim 6, it is characterised in that: the cap (10) is equipped with charging
Indicator light (11) and work light (12), charging indicator light (11) are connect through conducting wire (13) with charging circuit (4)；Work instruction
Lamp (12) is connect through conducting wire (13) with the indicating circuit in audio amplifier circuit (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820331193.2U CN208386891U (en) | 2018-03-12 | 2018-03-12 | A kind of Portable voice frequency amplifying device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820331193.2U CN208386891U (en) | 2018-03-12 | 2018-03-12 | A kind of Portable voice frequency amplifying device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208386891U true CN208386891U (en) | 2019-01-15 |
Family
ID=64974299
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820331193.2U Expired - Fee Related CN208386891U (en) | 2018-03-12 | 2018-03-12 | A kind of Portable voice frequency amplifying device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208386891U (en) |
-
2018
- 2018-03-12 CN CN201820331193.2U patent/CN208386891U/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: 20190115 Termination date: 20200312 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |