CN208540146U - Audio frequency processing circuit, sound system - Google Patents
Audio frequency processing circuit, sound system Download PDFInfo
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- CN208540146U CN208540146U CN201821020743.5U CN201821020743U CN208540146U CN 208540146 U CN208540146 U CN 208540146U CN 201821020743 U CN201821020743 U CN 201821020743U CN 208540146 U CN208540146 U CN 208540146U
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Abstract
The utility model discloses a kind of audio frequency processing circuit, using the sound system of audio frequency processing circuit, it include: left channel signals bus, adder, the machine power amplifier input terminal, online input terminal, right-channel signals bus, inverting amplifier, online output end, and first with three gears, third, 4th selection switch, right-channel signals bus, inverting amplifier, the second gear bit serial of first choice switch, the output end of first choice switch connects online output end, left channel signals bus, adder, the second gear bit serial of 4th selection switch, the third gear of 4th selection switch is connected to online input terminal, first, first gear of the 4th selection switch, the output end of third selection switch is all connected to adder, the output end of 4th selection switch is connected to the machine power amplifier input terminal, first grade of third selection switch Position is connected to left channel signals bus.Realize stereo, the changeable output of compound voice.
Description
Technical field
The utility model relates to speaker technology field, in particular to a kind of audio frequency processing circuit and a kind of application sound
The sound system of frequency processing circuit.
Background technique
The appearance of square dance, outdoor artist at any time, people are higher and higher to musical instruments equipment requirement, especially may be used
The independent speaker being convenient for carrying, however, current this speaker does not have the switching output function for realizing stereo and compound voice.
Utility model content
The main purpose of the utility model is to provide a kind of audio frequency processing circuit, it is intended to so that speaker has realization stereo
With the function of compound voice switching.
To achieve the above object, audio frequency processing circuit provided by the utility model, comprising: left channel signals bus, addition
Device, the machine power amplifier input terminal, online input terminal, right-channel signals bus, inverting amplifier, online output end, and have three
First choice switch, third selection switch and the 4th selection switch of gear,
The right-channel signals bus is connected to inverting amplifier, and the inverting amplifier is connected to the first choice and opens
The third gear of the second gear closed, the first choice switch is neutral gear, and the output end of the first choice switch connects connection
Machine output end,
The left channel signals bus is connected to the adder, and the adder is connected to the 4th selection switch
The third gear of second gear, the 4th selection switch is connected to the online input terminal, and the of the 4th selection switch
First gear of one gear and first choice switch is all connected to the adder, the output end of the 4th selection switch
It is connected to the machine power amplifier input terminal,
First gear of the third selection switch is connected to the left channel signals bus, the third selection switch
Second gear and third gear are neutral gear, and the output end of the third selection switch is connected to the adder.
Optionally, the inverting amplifier includes: the first operational amplifier, the 4th resistance, the 5th resistance, first capacitor,
5th resistance and first capacitor are parallel to the reverse input end and output end of the first operational amplifier, the first operational amplifier
Positive input ground connection, the both ends of the 4th resistance are separately connected the reverse input end and right channel letter of the first operational amplifier
Number bus, the output end of the first operational amplifier are connected to the second gear of the first choice switch.
Optionally, the adder includes: second operational amplifier, first resistor, second resistance, 3rd resistor, the 6th
Resistance, third capacitor and the second selection switch with three gears, the 6th resistance and third capacitor are parallel to the second operation
The both ends of the reverse input end and output end of amplifier, second resistance are connected to the reverse input end of second operational amplifier
It is grounded with the positive input of left channel signals bus, second operational amplifier, the output end of second operational amplifier is connected to
The output contact of second gear of the 4th selection switch, the second selection switch is connected to one end of first resistor, the first electricity
The other end of resistance is connected to the reverse input end of second operational amplifier, and second to select the first gear of switch be neutral gear, and second
The second gear and third gear for selecting switch are all connected between left channel signals bus and second resistance, and the one of 3rd resistor
End is connected to the reverse input end of second operational amplifier, and the other end is connected to the output contact of third selection switch, third choosing
The first gear for selecting switch is connected between right-channel signals bus and the 4th resistance, the second gear and the of third selection switch
Three gears are neutral gear.
Optionally, first resistor=the 4th resistance of second resistance=3rd resistor=2=the 6th resistance of 2 the 5th resistance=2.
Optionally, first resistor=5~30k.
Optionally, the first capacitor=47pF, and/or, the third capacitor=47pF.
Optionally, the audio frequency processing circuit further include: the second capacitor, second capacitor are set to first operation and put
Between the output end of big device and the second gear of first choice switch；
And/or the audio frequency processing circuit further include: the 4th capacitor, the 4th capacitor are set to second operation and put
Between the output end of big device and the second gear of the 4th selection switch；
And/or the audio frequency processing circuit further include: the 5th capacitor, the 5th capacitor are set to the 4th selection and open
Between the output contact of pass and the machine power amplifier input terminal.
Optionally, the second capacitor=1~100uF and/or, the 4th capacitor=1~100uF, and/or, the 5th capacitor=1st
~100uF.
Optionally, the first choice switch, the second selection switch, third selection switch and the described 4th
Switch is selected to select to switch for four-axle linkage third gear.
The utility model also proposes that a kind of sound system, including two speakers, a speaker include audio as described above
Processing circuit, the online output end of a speaker connect the online input terminal of another speaker by signal wire.
The utility model major technique design first is that being completed based on a kind of new this angle of experience or demand is provided
Utility model create, utility model people find the prior art can not achieve stereo and compound voice switching export to client with
The defect for having come experience and demand designs an audio frequency processing circuit based on this and realizes the function.
Specifically, the technical program is main is achieved in that using hardware design scheme, passes through three GSS Gear Select Switch
(first choice switch, third selection switch, the 4th selection switch) cleverly setting so that the audio frequency processing circuit have MONO,
Stereo Master, Link in Three models, while by the setting of adder and inverting amplifier, it can be achieved that stereo
Switching with compound voice exports, and user is facilitated to carry out personal settings to sound system.What is initially bought as user is mixed sound
Case, when the later period is wanted to play stereo, as long as a group establishment can be easy to by buying the speaker with the audio frequency processing circuit again
Body sound system plays broadcasting compound voice stereo, while still can be convenient, the design provide the user one it is completely new
Experience.Specifically when needing to play stereo, two speakers with the audio frequency processing circuit can be arbitrarily chosen, wherein by the
One speaker is connected to First speaker (host) as slave, by all sources of sound as host, the second speaker.Such First sound
Case (host) can play L channel sound, and second speaker (slave) can play right channel sound, so that system plays are stereo
The sound of effect.And need to play stereosonic sound equipment system in the prior art since the design of the audio frequency processing circuit solves
System needs two speakers to adjust to identical volume, EQ or reverberation etc., and manually adjusts it is difficult to ensure that adjusts to unanimously, into
And the problems such as impact effect, and the application only needs First speaker (host) changing volume, EQ or reverberation etc., entirely
System can change correspondingly.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, the structure that can also be shown according to these attached drawings obtains other attached drawings.
Fig. 1 is the circuit module schematic diagram of one embodiment of the utility model audio frequency processing circuit；
Fig. 2 is the circuit diagram of one embodiment of the utility model audio frequency processing circuit.
Drawing reference numeral explanation:
| Label | Title | Label | Title |
| R1 | First resistor | S1-A | First choice switch |
| R2 | Second resistance | S1-B | Second selection switch |
| R3 | 3rd resistor | S1-C | Third selection switch |
| R4 | 4th resistance | S1-D | 4th selection switch |
| R5 | 5th resistance | L-SIGNAL | Left channel signals main line |
| R6 | 6th resistance | R-SIGNAL | Right-channel signals main line |
| C1 | First capacitor | MIX-IN | Online input terminal |
| C2 | Second capacitor | MIX-OUT | Online output end |
| C3 | Third capacitor | OUT-SIGNAL | The machine power amplifier input terminal |
| C4 | 4th capacitor | ||
| C5 | 5th capacitor |
The embodiments will be further described with reference to the accompanying drawings for the realization, functional characteristics and advantage of the utility model aim.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describing, it is clear that described embodiment is only a part of the embodiment of the utility model, rather than all
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are not making creative work premise
Under every other embodiment obtained, fall within the protection scope of the utility model.
It is to be appreciated that the directional instruction (such as up, down, left, right, before and after ...) of institute in the utility model embodiment
It is only used for explaining in relative positional relationship, the motion conditions etc. under a certain particular pose (as shown in the picture) between each component, such as
When the fruit particular pose changes, then directionality instruction also correspondingly changes correspondingly.
In addition, the description for being related to " first ", " second " etc. in the present invention is used for description purposes only, and cannot understand
For its relative importance of indication or suggestion or implicitly indicate the quantity of indicated technical characteristic.Define as a result, " first ",
The feature of " second " can explicitly or implicitly include at least one of the features.In addition, the technical side between each embodiment
Case can be combined with each other, but must be based on can be realized by those of ordinary skill in the art, when the combination of technical solution
Conflicting or cannot achieve when occur will be understood that the combination of this technical solution is not present, also not in the requires of the utility model
Protection scope within.
The utility model proposes a kind of audio frequency processing circuits.
Referring to Figures 1 and 2, technical solutions of the utility model propose a kind of audio frequency processing circuit, comprising: left channel signals are total
Line (L-SIGNAL), adder, the machine power amplifier input terminal (OUT-SIGNAL), online input terminal (MIX-IN), right-channel signals
Bus (R-SIGNAL), inverting amplifier, online output end (MIX-OUT), and the switch of the first choice with three gears
(S1-A), the second selection switch (S1-B), third selection switch (S1-C) and the 4th selection switch (S1-D),
The right-channel signals bus (R-SIGNAL) is connected to inverting amplifier, and the inverting amplifier is connected to described
First choice switchs second gear of (S1-A), and the third gear of first choice switch (S1-A) is neutral gear, and described first
The output end of selection switch (S1-A) connects online output end (MIX-OUT), and the left channel signals bus (L-SIGNAL) is even
It is connected to the adder, the adder is connected to the second gear of the 4th selection switch (S1-D), the 4th selection
The third gear of switch (S1-D) is connected to the online input terminal (MIX-IN), and the of the 4th selection switch (S1-D)
First gear of one gear and first choice switch (S1-A) is all connected to the adder, the 4th selection switch
(S1-D) output end is connected to the machine power amplifier input terminal (OUT-SIGNAL),
First gear of the third selection switch (S1-C) is connected to the left channel signals bus (L-SIGNAL),
The third selects the second gear of switch (S1-C) and third gear is neutral gear, the output of the third selection switch (S1-C)
End is connected to the adder.
Preferably, referring to Fig.1 or Fig. 2, the inverting amplifier include: the first operational amplifier, the 4th resistance (R4),
Five resistance (R5), first capacitor (C1),
5th resistance (R5) and first capacitor (C1) are parallel to the reverse input end and output end of the first operational amplifier,
The positive input of first operational amplifier is grounded, and the both ends of the 4th resistance (R4) are separately connected the reversed of the first operational amplifier
Input terminal and the right-channel signals bus (R-SIGNAL), the output end of the first operational amplifier are connected to the first choice
Switch second gear of (S1-A).
Preferably, referring to Fig.1 or Fig. 2, the adder include: second operational amplifier, first resistor (R1), second
Resistance (R2), 3rd resistor (R3), the 6th resistance (R6), third capacitor (C3) and the second selection switch with three gears
(S1-B),
6th resistance (R6) and third capacitor (C3) are parallel to the reverse input end and output end of second operational amplifier,
The both ends of second resistance (R2) are connected to the reverse input end and left channel signals bus (L- of second operational amplifier
SIGNAL), the positive input ground connection of second operational amplifier, the output end of second operational amplifier are connected to the 4th choosing
The second gear of switch (S1-D) is selected,
The output contact of second selection switch (S1-B) is connected to one end of first resistor (R1), first resistor (R1)
The other end is connected to the reverse input end of second operational amplifier, and second selects to switch first gear of (S1-B) to be neutral gear, the
The second gear and third gear of two selection switches (S1-B) are all connected to left channel signals bus (L-SIGNAL) and the second electricity
It hinders between (R2),
One end of 3rd resistor (R3) is connected to the reverse input end of second operational amplifier, and the other end is connected to third choosing
The output contact of switch (S1-C) is selected, the first gear of third selection switch (S1-C) is connected to right-channel signals bus (R-
SIGNAL) between the 4th resistance (R4), third selects the second gear of switch (S1-C) and third gear is neutral gear.
To sum up, technical solutions of the utility model by three GSS Gear Select Switch, (open by first choice switch S1-A, the second selection
Close S1-B, third selection switch S1-C, the 4th selection switch S1-D) setting realization MONO, Stereo Master, Link
In Three models facilitate user to carry out personal settings to sound system.
Specifically, when switch is allocated to MONE grades, namely switch (first choice switch S1-A, second select switch S1-B,
Third selection switch S1-C, the 4th selection switch S1-D) it is allocated to the first gear；
Switch 5 and 6,9 and 10,13 and 14,1 is connected with 2 feet, left channel signals (L-SIGNAL) and right-channel signals
(R-SIGNAL) pass through second resistance (R2) and 3rd resistor (R3), mixing output, at this point, the machine power amplifier (OUT-SIGNAL) is defeated
Left/right sound channel mixed signal (mixed signal of L-SIGNAL and R-SIGNAL) out, wherein can be by the machine power amplifier (OUT-
SIGNAL) the left/right sound channel mixed signal (mixed signal of L-SIGNAL and R-SIGNAL) exported is sent at other audios
Equipment is managed, online input terminal (MIX-IN) input at this time is invalid.
When switch is allocated to Master grades of Stereo, namely switch (first choice switch S1-A, the second selection switch S1-
B, third selection switch S1-C, the 4th selection switch S1-D) it is allocated to the second gear；
Switch 7 and 6,11 and 10,15 and 14,3 are connected with 2 feet, and left channel signals (L-SIGNAL) pass through in parallel the
One resistance (R1) and second resistance (R2) are input to amplifier again, export through enhanced processing to the machine power amplifier (OUT-SIGNAL), right
Sound channel signal (R-SIGNAL) is exported through the 4th resistance (R4), after amplifier is amplified, until online output end (MIX-OUT), this
When, the machine power amplifier exports left channel signals, and online output end exports right channel side signal, this gear input terminal (MIX- immediately
IN) input is invalid.
When switch is allocated in grades of Link,
Switch 8 and 6,12 and 10,16 and 14,4 are connected with 2 feet, and right-channel signals are cut off by S1-D at this time, the machine input
Without output, signal can only be inputted from Link in.
And the audio frequency processing circuit may be implemented modularized design, this is independent for corresponding one an of audio frequency processing circuit
Module, and the speaker that the audio frequency processing circuit is arranged can be holonomic system, remove this module with audio frequency processing circuit
Speaker still can be used, and when needing to play stereo, can choose two speakers with the module, wherein by first
Speaker is as host, and for the second speaker as slave, the online input terminal of the online output end connection slave speaker of host speaker is secondary
Machine is adjusted to third gear (link in gear) always, when host is adjusted to the second gear (stereo Master gear)
Play out stereophonic effect.
Specifically, a. separate unit speaker is in use, be please allocated to the position the first gear (MONO) for the switch, and the machine plays at this time
L.R (left/right sound channel) mixed sound, while MIX OUT (online output end) exports L.R mixed signal.System plays left/right
The mixed sound of sound channel.
B. two voice box groups are at stereophonic sound system in use, by MIX OUT (online output end) connection of First speaker
To second MIX IN (online input terminal), First speaker is set as host (MAIN), and second speaker is set as slave
(SLAVE).All sources of sound are connected to First speaker (host).First speaker meeting at this time (host) plays L channel sound
Sound, second speaker (slave) can play right channel sound, thus the sound of system plays stereophonic effect.
And by the design when First speaker changes volume, EQ or reverberation etc., whole system can be changed correspondingly.Solution
It has determined in the prior art, has needed to adjust volume, EQ or the reverberation of two speakers simultaneously, and adjusted be difficult to be adjusted to one respectively
Sample influences result of broadcast.
In the present embodiment, in order to make the preferable tone of circuit output, the technical program is using following setting: first resistor
(R1)=second resistance (R2)=the 6th resistance of 3rd resistor (R3)=2 the 4th resistance (R4)=2 the 5th resistance (R5)=2
(R6)。
Preferably, first resistor=5~30k, such as first resistor=5k, 10k, 20k, 30k,
Specifically, first resistor (R1)=20k, second resistance (R2)=20k, 3rd resistor (R3)=20k, the 4th resistance
(R4)=10, the 5th resistance (R5)=10k, the 6th resistance (R6)=10k.
Preferably, in order to enable audio frequency processing circuit output audio is more preferable, using following design: the audio processing electricity
Road further include: the second capacitor (C2), second capacitor (C2) are set to the output end and described the of first operational amplifier
Between second gear of one selection switch (S1-A)；
And/or the audio frequency processing circuit further include: the 4th capacitor (C4), the 4th capacitor (C4) are set to described the
Between the output end of two operational amplifiers and the second gear of the 4th selection switch (S1-D)；
And/or the audio frequency processing circuit further include: the 5th capacitor (C5), the 5th capacitor (C5) are set to described the
Between the output contact and the machine power amplifier input terminal of four selection switches.
It is to be appreciated that the audio frequency processing circuit of the utility model can select the second capacitor, the 4th capacitor, the 5th capacitor
Wherein any one, can also select the second capacitor and the 4th capacitor, the second capacitor and the 5th capacitor, the 4th capacitor or the 5th electricity
Hold, most preferably, using the second capacitor of selection, the 4th capacitor and the 5th capacitor.
Further, it is preferable that the second capacitor=1~100uF and/or, the 4th capacitor=1~100uF, and/or, the 5th
Capacitor=1~100uF.
Specifically have following set-up mode: can with the second capacitor, the 4th capacitor, the 5th capacitor wherein any one using 1~
100uF capacitance value range；
The capacitance of second capacitor and the 4th capacitor can also be arranged in the range of 1~100uF；
The capacitance of second capacitor and the 5th capacitor can also be arranged in the range of 1~100uF；
The capacitance of 4th capacitor and the 5th capacitor can also be arranged in the range of 1~100uF；
The capacitance of second capacitor, the 4th capacitor and the 5th capacitor can also be arranged to the range of 1~100uF.
Most preferably: the second capacitor (C2)=22uF, the 4th capacitor (C4)=22uF, the 5th capacitor (C5)=22uF.
Preferably, first capacitor (C1)=47pF, third capacitor (C3)=47pF
Preferably, the first choice switch (S1-A), the second selection switch (S1-B), third selection switch
(S1-C), the described 4th switch (S1-D) is selected to select to switch for four-axle linkage third gear.The technical program is by being designed in this way essence
On, it is switched only with one, namely stir a switch, four switch while converting gear.More convenient realization control.
Preferably, first choice switch (S1-A), the second selection switch (S1-B), third selection switch are stated
(S1-C), the described 4th select switch (S1-D) for DPTT double-pole triple throw four-axle linkage switch.
The utility model also proposes a kind of sound system, including two speakers, and it includes as described above for carrying out that described speaker
Audio frequency processing circuit, the online output end (MIX-OUT) of a speaker connects the online input terminal of another speaker by signal wire
(MIX-IN)。
The utility model also proposes a kind of sound system, which includes two speakers, and two speakers include as above
The online output end (MIX-OUT) of the audio frequency processing circuit, a speaker connects the online defeated of another speaker by signal wire
Enter end (MIX-IN).The specific structure of the audio frequency processing circuit is referring to above-described embodiment, since this sound system is using above-mentioned
Whole technical solutions of all embodiments, thus it is at least all beneficial to effect brought by the technical solution with above-described embodiment
Fruit, this is no longer going to repeat them.
Moreover, the online output end (MIX-OUT) of a speaker is connected another speaker by signal wire by this sound box system
Online input terminal (MIX-IN), can so carry out personal settings, such as play mixing sound or play three-dimensional sound, and the sound equipment
As long as system adjusts volume, EQ or the reverberation etc. of a speaker (host), volume, EQ or reverberation of whole system etc. all can be therewith
Change, and then good audio effect may be implemented.
Wherein, it is as follows to play stereo or compound voice method and step for sound system:
Specifically, it is as follows to play stereosonic method:
By the first choice switch (S1-A) of the second speaker, the second selection switch (S1-B), third selection switch (S1-C)
It is allocated to third gear (2 are connected with 4,6 with 8,10 with 12,14 with 16 feet) with the 4th selection switch (S1-D), by the first speaker
First choice switch (S1-A), second selection switch (S1-B), third selection switch (S1-C) and the 4th selection switch (S1-
D) it is allocated to the second gear (2 are connected with 3,6 with 7,10 with 11,14 with 15 feet)；
The method for playing compound voice is as follows:
By the first choice switch (S1-A) of the second speaker, the second selection switch (S1-B), third selection switch (S1-C)
It is allocated to third gear (2 are connected with 4,6 with 8,10 with 12,14 with 16 feet) with the 4th selection switch (S1-D), by the first speaker
First choice switch (S1-A), second selection switch (S1-B), third selection switch (S1-C) and the 4th selection switch (S1-
D the first gear (1 and 2,5 and 6,9 and 10,13 and 14)) are allocated to.
The above is only the preferred embodiment of the present invention, and therefore it does not limit the scope of the patent of the utility model,
Under all utility models in the utility model are conceived, equivalent structure made based on the specification and figures of the utility model
Transformation, or directly/be used in other related technical areas indirectly and be included in the scope of patent protection of the utility model.
Claims (10)
1. a kind of audio frequency processing circuit, which is characterized in that
It include: left channel signals bus, adder, the machine power amplifier input terminal, online input terminal, right-channel signals bus, reverse phase
Amplifier, online output end, and the switch of the first choice with three gears, third selection switch and the 4th selection switch,
The right-channel signals bus is connected to inverting amplifier, and the inverting amplifier is connected to the first choice switch
The third gear of second gear, the first choice switch is neutral gear, and the output end connection of the first choice switch is online defeated
Outlet,
The left channel signals bus is connected to the adder, and the adder is connected to the second of the 4th selection switch
The third gear of gear, the 4th selection switch is connected to the online input terminal, and the described 4th selects first grade of switch
First gear of position and first choice switch is all connected to the adder, the output end connection of the 4th selection switch
In the machine power amplifier input terminal,
First gear of the third selection switch is connected to the left channel signals bus, and the third selects the second of switch
Gear and third gear are neutral gear, and the output end of the third selection switch is connected to the adder.
2. audio frequency processing circuit as described in claim 1, which is characterized in that the inverting amplifier includes: that the first operation is put
Big device, the 4th resistance, the 5th resistance, first capacitor,
5th resistance and first capacitor are parallel to the reverse input end and output end of the first operational amplifier, the first operation amplifier
The positive input of device is grounded, and the both ends of the 4th resistance are separately connected the reverse input end and the right sound of the first operational amplifier
Road signal bus, the output end of the first operational amplifier are connected to the second gear of the first choice switch.
3. audio frequency processing circuit as claimed in claim 2, which is characterized in that the adder include: second operational amplifier,
First resistor, second resistance, 3rd resistor, the 6th resistance, third capacitor and the second selection switch with three gears,
6th resistance and third capacitor are parallel to the reverse input end and output end of second operational amplifier, and the two of second resistance
End is connected to the reverse input end and left channel signals bus of second operational amplifier, and the forward direction of second operational amplifier is defeated
Entering end ground connection, the output end of second operational amplifier is connected to the second gear of the 4th selection switch,
The output contact of second selection switch is connected to one end of first resistor, and the other end of first resistor is connected to the second operation
The reverse input end of amplifier, second to select the first gear of switch be neutral gear, the second gear and third that the second selection switchs
Gear is all connected between left channel signals bus and second resistance,
One end of 3rd resistor is connected to the reverse input end of second operational amplifier, and the other end is connected to third selection switch
First gear of output contact, third selection switch is connected between right-channel signals bus and the 4th resistance, and third selection is opened
The second gear and third gear closed is neutral gear.
4. audio frequency processing circuit as claimed in claim 3, which is characterized in that first resistor, second resistance and 3rd resistor
Resistance value is equal, and the resistance value of the 4th resistance, the 5th resistance and the 6th resistance is the half of first resistor resistance value.
5. audio frequency processing circuit as claimed in claim 4, which is characterized in that the resistance value of first resistor is 5~30k.
6. audio frequency processing circuit as described in claim 5, which is characterized in that the capacity of the first capacitor is 47pF, and/
Or, the capacity of the third capacitor is 47pF.
7. audio frequency processing circuit as described in claim 5, which is characterized in that the audio frequency processing circuit further include: second
Capacitor, second capacitor be set to first operational amplifier output end and the first choice switch the second gear it
Between；
And/or the audio frequency processing circuit further include: the 4th capacitor, the 4th capacitor are set to the second operational amplifier
Output end and it is described 4th selection switch the second gear between；
And/or the audio frequency processing circuit further include: the 5th capacitor, the 5th capacitor are set to the 4th selection switch
Between output contact and the machine power amplifier input terminal.
8. audio frequency processing circuit as claimed in claim 7, which is characterized in that the capacity of the second capacitor be 1~100uF and/
Or, the capacity of the 4th capacitor is 1~100uF, and/or, the capacity of the 5th capacitor is 1~100uF.
9. audio frequency processing circuit as claimed in claim 3, which is characterized in that the first choice switch, second selection
Switch, the third select switch and the described 4th that switch is selected to select to switch for four-axle linkage third gear.
10. a kind of sound system, which is characterized in that including two speakers, a speaker includes as any in claim 1 to 9
Audio frequency processing circuit described in, the online output end of a speaker connect the online input terminal of another speaker by signal wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821020743.5U CN208540146U (en) | 2018-06-29 | 2018-06-29 | Audio frequency processing circuit, sound system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821020743.5U CN208540146U (en) | 2018-06-29 | 2018-06-29 | Audio frequency processing circuit, sound system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208540146U true CN208540146U (en) | 2019-02-22 |
Family
ID=65379311
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821020743.5U Active CN208540146U (en) | 2018-06-29 | 2018-06-29 | Audio frequency processing circuit, sound system |
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| Country | Link |
|---|---|
| CN (1) | CN208540146U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108566591A (en) * | 2018-06-29 | 2018-09-21 | 宁波东源音响器材有限公司 | Audio frequency processing circuit, sound system and stereo or compound voice the method for broadcasting |
-
2018
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108566591A (en) * | 2018-06-29 | 2018-09-21 | 宁波东源音响器材有限公司 | Audio frequency processing circuit, sound system and stereo or compound voice the method for broadcasting |
| CN108566591B (en) * | 2018-06-29 | 2024-02-27 | 宁波东源音响器材有限公司 | Audio processing circuit, sound system and method for playing stereo or mixed sound |
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