CN205179339U - Audio circuit structure - Google Patents
Audio circuit structure Download PDFInfo
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- CN205179339U CN205179339U CN201520953443.2U CN201520953443U CN205179339U CN 205179339 U CN205179339 U CN 205179339U CN 201520953443 U CN201520953443 U CN 201520953443U CN 205179339 U CN205179339 U CN 205179339U
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- power amplifier
- electric capacity
- audio signal
- filter circuit
- signal source
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Abstract
The utility model is suitable for an audio circuit field provides an audio circuit structure, including set up audio signal source on the PCB board, with power amplifier that audio signal source connects and with the loudspeaker that power amplifier connects, audio signal source with be connected with filter circuit between the power amplifier, filter circuit is close to audio signal source just keeps away from power amplifier sets up or is close to power amplifier just keeps away from audio signal source sets up. The utility model discloses a be close to filter circuit audio signal source and keep away from power amplifier and set up or be close to power amplifier and keep away from audio signal source and set up, make the interfering signal that connection cable brought between audio signal source or audio signal source and the power amplifier can be by filter circuit filtering nearby, realize the physics isolation between interfering signal and other audio signal source 2 to furthest's weakening interfering signal.
Description
Technical field
The utility model belongs to voicefrequency circuit field, particularly relates to a kind of voicefrequency circuit structure.
Background technology
Electronic product is in the market mostly with audio-frequency function, when pcb board carries out voicefrequency circuit wiring, if the physical isolation process between audio parts is bad, just be easy to interfering noise occur, the tonequality of electronic product can be badly influenced, even after turning off effective sound, the interfering noise that audio parts still can send " creak ".
Utility model content
The purpose of this utility model is to provide a kind of voicefrequency circuit structure, the physical isolation process being intended to solve between audio parts is bad, just be easy to interfering noise occur, the tonequality of electronic product can be badly influenced, even after turning off effective sound, the problem of the interfering noise that audio parts still can send " creak ".
The utility model realizes like this, a kind of voicefrequency circuit structure, the loudspeaker comprising the audio signal source be arranged on pcb board, the power amplifier be connected with described audio signal source and be connected with described power amplifier, be connected with filter circuit between described audio signal source and described power amplifier, described filter circuit to arrange near described audio signal source and away from described power amplifier or arranges away from described audio signal source near described power amplifier.
Preferably, described filter circuit is RC filter circuit.
Preferably, described audio signal source comprises the L channel output and R channel output that are arranged side by side, between described L channel output and described power amplifier, filter circuit described in a road is respectively provided with between described R channel output and described power amplifier, wherein, filter circuit between described L channel output and described power amplifier comprises resistance R1 and electric capacity C1, filter circuit between described R channel output and described power amplifier comprises resistance R2 and electric capacity C2, resistance R1 and resistance R2, electric capacity C1 and electric capacity C2, be symmetrical arranged along the perpendicular bisector direction of line between described L channel output and R channel output respectively.
Preferably, one end and the described power amplifier of audio signal source, the other end and electric capacity C1 described in resistance R1 mono-termination connect altogether, the other end ground connection of electric capacity C1; The one end of audio signal source, the other end and described electric capacity C2 described in resistance R2 mono-termination and described power amplifier connects altogether, the other end ground connection of electric capacity C2.
Preferably, secondary filter circuit is also connected with between described filter circuit and described power amplifier.
Preferably, described secondary filter circuit is arranged away from described audio signal source near described power amplifier.
Preferably, described secondary filter circuit is coupling capacitance.
Preferably, described audio signal source comprises the L channel output and R channel output that are arranged side by side, secondary filter circuit described in filter circuit described in a road and a road is respectively connected with between described L channel output and described power amplifier, between described R channel output and described power amplifier, wherein, the filter circuit between described L channel output and described power amplifier comprises resistance R1 and electric capacity C1, secondary filter circuit comprises coupling capacitance C3; Filter circuit between described R channel output and described power amplifier comprises resistance R2 and electric capacity C2, secondary filter circuit comprises coupling capacitance C4, resistance R1 and resistance R2, electric capacity C1 and electric capacity C2, coupling capacitance C3 and coupling capacitance C4, be symmetrical arranged along the perpendicular bisector direction of line between described L channel output and R channel output respectively.
Preferably, one end of audio signal source, the other end and electric capacity C1 described in resistance R1 mono-termination and one end of electric capacity C3 connect altogether, the other end ground connection of electric capacity C1, power amplifier described in another termination of electric capacity C3; One end of audio signal source, the other end and electric capacity C2 described in resistance R2 mono-termination and one end of electric capacity C4 connect altogether, the other end ground connection of electric capacity C2, power amplifier described in another termination of electric capacity C4.
Preferably, the resistance of resistance R1 and resistance R2 is equal and Standard resistance range is 2.2K Ω ~ 6.8K Ω, and the capacitance of electric capacity C1 and electric capacity C2 is equal and capacitance swing is 100pF ~ 4700pF.
Compared with prior art, beneficial effect is the utility model:
By arranging filter circuit, can the effective interference signal that produces of filtering voicefrequency circuit sound intermediate frequency signal source;
By filter circuit to be arranged near audio signal source and away from power amplifier on pcb board or near power amplifier and arranging away from audio signal source, the filtered circuit of the interference signal filtering nearby that audio signal source or the connection cable between audio signal source and power amplifier are brought, realize the physical isolation between interference signal and other electronic devices and components, thus weaken interference signal to greatest extent;
By the resistance in voicefrequency circuit and electric capacity are symmetrical arranged, what can make interference signal in the audio signal exported through L channel output and R channel output can obtain synchronous filtering, make audio signal can remain synchronous, ensure the consistency of its signal;
By arranging secondary filter circuit, can on the basis of filter circuit, the interference signal in further filtering circuit.
Accompanying drawing explanation
Fig. 1 is the cabling schematic diagram of voicefrequency circuit structure on pcb board that the utility model embodiment one provides;
Fig. 2 is the cabling schematic diagram of voicefrequency circuit structure on pcb board that the utility model embodiment two provides;
Fig. 3 is the cabling schematic diagram of voicefrequency circuit structure on pcb board that the utility model embodiment three provides;
Fig. 4 is the cabling schematic diagram of voicefrequency circuit structure on pcb board that the utility model embodiment four provides.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.
Fig. 1 ~ 4 only illustrate the relative position relation of voicefrequency circuit when pcb board upward wiring between each device.
Embodiment one
Fig. 1 is the cabling schematic diagram of voicefrequency circuit structure on pcb board that the utility model embodiment one provides.
As shown in Figure 1, the voicefrequency circuit structure that the utility model provides, the loudspeaker 30 comprising the audio signal source 10 be arranged on pcb board, the power amplifier 20 be connected with audio signal source 10 and be connected with power amplifier 20, be connected with filter circuit 40 between audio signal source 10 and power amplifier 20, filter circuit 40 is arranged near audio signal source 10 and away from power amplifier 20 or near power amplifier 20 and arranging away from audio signal source 10.Fig. 1 only illustrates the situation that filter circuit 40 is arranged near audio signal source 10 and away from power amplifier 20.
In a particular application, when confirming interference signal from audio signal source, filter circuit should be arranged away from power amplifier near audio signal source as far as possible, can the interference signal that produces of better filtering audio signal source; When can not confirm interference signal from audio signal source or the cabling between audio signal source and power amplifier very long time, filter circuit should be arranged away from audio signal source near power amplifier as far as possible, can the interference signal that produces of better filtering audio signal source.
In concrete application, filter circuit can be the RC filter circuit be made up of resistance and electric capacity, also can be that other have the circuit of audio frequency filter function.
Embodiment two
Fig. 2 is the cabling schematic diagram of voicefrequency circuit structure on pcb board that the utility model embodiment three provides.
The present embodiment is on the basis of embodiment one, illustrates the Wiring structure of voicefrequency circuit on pcb board by exemplifying a kind of concrete filter circuit.Fig. 2 only illustrates the situation that filter circuit 40 is arranged near audio signal source 10 and away from power amplifier 20.
As shown in Figure 2, described audio signal source 10 comprises the L channel output L and R channel output R that are arranged side by side, between described L channel output L and described power amplifier 20, filter circuit 40 described in a road is respectively provided with between described R channel output R and described power amplifier 20, wherein, filter circuit 40 between described L channel output L and described power amplifier 20 comprises resistance R1 and electric capacity C1, filter circuit 40 between described R channel output R and described power amplifier 20 comprises resistance R2 and electric capacity C2, resistance R1 and resistance R2, electric capacity C1 and electric capacity C2, be symmetrical arranged along the perpendicular bisector direction of line between described L channel output L and R channel output R respectively.
One end and the described power amplifier 20 of audio signal source 10, the other end and electric capacity C1 described in resistance R1 mono-termination connect altogether, the other end ground connection of electric capacity C1; The one end of audio signal source 10, the other end and described electric capacity C2 described in resistance R2 mono-termination and described power amplifier 20 connects altogether, the other end ground connection of electric capacity C2.
In a particular application, filter circuit equivalence can replace with the circuit structure that other has audio frequency filter function, be not limited to the circuit structure in the present embodiment, only need meet electronic devices and components corresponding in two-way filter circuit and all be symmetrical arranged relative to audio signal source.
Embodiment three
Fig. 3 is the cabling schematic diagram of voicefrequency circuit structure on pcb board that the utility model embodiment three provides.The present embodiment is the further improvement done on the basis of enforcement one.Fig. 3 only illustrates the situation that filter circuit 40 is arranged near power amplifier 20 and away from audio signal source 10.
As shown in Figure 3, be also connected with secondary filter circuit 50 between described filter circuit 40 and described power amplifier 20, described secondary filter circuit 50 is near described power amplifier and arrange away from described audio signal source.
In a particular application, secondary filter circuit can select coupling capacitance.
Embodiment four
Fig. 4 is the cabling schematic diagram of voicefrequency circuit structure on pcb board that the utility model embodiment four provides.The present embodiment is on the basis of embodiment three, by exemplifying concrete filter circuit and secondary filter circuit illustrates the Wiring structure of voicefrequency circuit on pcb board.Fig. 4 only illustrates the situation that filter circuit 40 is arranged near power amplifier 20 and away from audio signal source 10.
As shown in Figure 4, described audio signal source 10 comprises the L channel output L and R channel output R that are arranged side by side, secondary filter circuit 50 described in filter circuit 40 described in a road and a road is respectively connected with between described L channel output L and described power amplifier 20, between described R channel output R and described power amplifier 20, wherein, the filter circuit 40 between described L channel output L and described power amplifier 20 comprises resistance R1 and electric capacity C1, secondary filter circuit 50 comprises coupling capacitance C3; Filter circuit 40 between described R channel output R and described power amplifier 20 comprises resistance R2 and electric capacity C2, secondary filter circuit 50 comprises coupling capacitance C4, resistance R1 and resistance R2, electric capacity C1 and electric capacity C2, coupling capacitance C3 and coupling capacitance C4, be symmetrical arranged along the perpendicular bisector direction of line between described L channel output L and R channel output R respectively.
One end of audio signal source 10, the other end and electric capacity C1 described in resistance R1 mono-termination and one end of electric capacity C3 connect altogether, the other end ground connection of electric capacity C1, power amplifier 20 described in another termination of electric capacity C3; One end of audio signal source 10, the other end and electric capacity C2 described in resistance R2 mono-termination and one end of electric capacity C4 connect altogether, the other end ground connection of electric capacity C2, power amplifier 20 described in another termination of electric capacity C4.
In a particular application, filter circuit equivalence can replace with the circuit structure that other has audio frequency filter function, be not limited to the circuit structure in the present embodiment, only need meet electronic devices and components corresponding in two-way filter circuit and all be symmetrical arranged relative to audio signal source.
In a particular application, the resistance R1 in embodiment two and embodiment four is equal with the resistance of resistance R2 and Standard resistance range is 2.2K Ω ~ 6.8K Ω, and the capacitance of electric capacity C1 and electric capacity C2 is equal and capacitance swing is 100pF ~ 4700pF.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all do within spirit of the present utility model and principle any amendment, equivalent to replace and improvement etc., all should be included within protection range of the present utility model.
Claims (10)
1. a voicefrequency circuit structure, the loudspeaker comprising the audio signal source be arranged on pcb board, the power amplifier be connected with described audio signal source and be connected with described power amplifier, it is characterized in that, be connected with filter circuit between described audio signal source and described power amplifier, described filter circuit to arrange near described audio signal source and away from described power amplifier or arranges away from described audio signal source near described power amplifier.
2. voicefrequency circuit structure as claimed in claim 1, it is characterized in that, described filter circuit is RC filter circuit.
3. voicefrequency circuit structure as claimed in claim 1, it is characterized in that, described audio signal source comprises the L channel output and R channel output that are arranged side by side, between described L channel output and described power amplifier, filter circuit described in a road is respectively provided with between described R channel output and described power amplifier, wherein, filter circuit between described L channel output and described power amplifier comprises resistance R1 and electric capacity C1, filter circuit between described R channel output and described power amplifier comprises resistance R2 and electric capacity C2, resistance R1 and resistance R2, electric capacity C1 and electric capacity C2, be symmetrical arranged along the perpendicular bisector direction of line between described L channel output and R channel output respectively.
4. voicefrequency circuit structure as claimed in claim 3, it is characterized in that, one end and the described power amplifier of audio signal source, the other end and electric capacity C1 described in resistance R1 mono-termination connect altogether, the other end ground connection of electric capacity C1; The one end of audio signal source, the other end and described electric capacity C2 described in resistance R2 mono-termination and described power amplifier connects altogether, the other end ground connection of electric capacity C2.
5. voicefrequency circuit structure as claimed in claim 1, is characterized in that, be also connected with secondary filter circuit between described filter circuit and described power amplifier.
6. voicefrequency circuit structure as claimed in claim 5, is characterized in that, described secondary filter circuit is near described power amplifier and arrange away from described audio signal source.
7. the voicefrequency circuit structure as described in claim 5 or 6, is characterized in that, described secondary filter circuit is coupling capacitance.
8. the voicefrequency circuit structure as described in claim 5 or 6, it is characterized in that, described audio signal source comprises the L channel output and R channel output that are arranged side by side, secondary filter circuit described in filter circuit described in a road and a road is respectively connected with between described L channel output and described power amplifier, between described R channel output and described power amplifier, wherein, the filter circuit between described L channel output and described power amplifier comprises resistance R1 and electric capacity C1, secondary filter circuit comprises coupling capacitance C3; Filter circuit between described R channel output and described power amplifier comprises resistance R2 and electric capacity C2, secondary filter circuit comprises coupling capacitance C4, resistance R1 and resistance R2, electric capacity C1 and electric capacity C2, coupling capacitance C3 and coupling capacitance C4, be symmetrical arranged along the perpendicular bisector direction of line between described L channel output and R channel output respectively.
9. voicefrequency circuit structure as claimed in claim 8, it is characterized in that, one end of audio signal source, the other end and electric capacity C1 described in resistance R1 mono-termination and one end of electric capacity C3 connect altogether, the other end ground connection of electric capacity C1, power amplifier described in another termination of electric capacity C3; One end of audio signal source, the other end and electric capacity C2 described in resistance R2 mono-termination and one end of electric capacity C4 connect altogether, the other end ground connection of electric capacity C2, power amplifier described in another termination of electric capacity C4.
10. the voicefrequency circuit structure as described in claim 4 or 9, is characterized in that, the resistance of resistance R1 and resistance R2 is equal and Standard resistance range is 2.2K Ω ~ 6.8K Ω, and the capacitance of electric capacity C1 and electric capacity C2 is equal and capacitance swing is 100pF ~ 4700pF.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520953443.2U CN205179339U (en) | 2015-11-25 | 2015-11-25 | Audio circuit structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520953443.2U CN205179339U (en) | 2015-11-25 | 2015-11-25 | Audio circuit structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205179339U true CN205179339U (en) | 2016-04-20 |
Family
ID=55743264
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520953443.2U Active CN205179339U (en) | 2015-11-25 | 2015-11-25 | Audio circuit structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205179339U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107889024A (en) * | 2017-11-21 | 2018-04-06 | 深圳市沃特沃德股份有限公司 | Voicefrequency circuit and vehicle control syetem |
| CN110662137A (en) * | 2019-09-27 | 2020-01-07 | 深圳市元征科技股份有限公司 | Vehicle-mounted audio linear amplification circuit and device |
| CN114401475A (en) * | 2022-02-23 | 2022-04-26 | 广州高新兴机器人有限公司 | Audio amplifier system |
-
2015
- 2015-11-25 CN CN201520953443.2U patent/CN205179339U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107889024A (en) * | 2017-11-21 | 2018-04-06 | 深圳市沃特沃德股份有限公司 | Voicefrequency circuit and vehicle control syetem |
| CN110662137A (en) * | 2019-09-27 | 2020-01-07 | 深圳市元征科技股份有限公司 | Vehicle-mounted audio linear amplification circuit and device |
| CN114401475A (en) * | 2022-02-23 | 2022-04-26 | 广州高新兴机器人有限公司 | Audio amplifier system |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |