CN103826185B - Natural sound effect processing circuit - Google Patents
Natural sound effect processing circuit Download PDFInfo
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- CN103826185B CN103826185B CN201410084180.6A CN201410084180A CN103826185B CN 103826185 B CN103826185 B CN 103826185B CN 201410084180 A CN201410084180 A CN 201410084180A CN 103826185 B CN103826185 B CN 103826185B
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- 230000000694 effects Effects 0.000 title claims abstract description 27
- 239000003990 capacitor Substances 0.000 claims abstract description 51
- 230000008878 coupling Effects 0.000 claims abstract description 45
- 238000010168 coupling process Methods 0.000 claims abstract description 45
- 238000005859 coupling reaction Methods 0.000 claims abstract description 45
- 238000007599 discharging Methods 0.000 claims description 75
- 238000000034 method Methods 0.000 claims description 27
- 229910052715 tantalum Inorganic materials 0.000 claims description 6
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical group [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 claims description 6
- 239000010409 thin film Substances 0.000 claims description 6
- 238000001914 filtration Methods 0.000 claims description 2
- 230000003321 amplification Effects 0.000 abstract description 3
- 238000003199 nucleic acid amplification method Methods 0.000 abstract description 3
- 230000000704 physical effect Effects 0.000 abstract 1
- 230000005236 sound signal Effects 0.000 description 6
- 230000005611 electricity Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 2
- 230000005669 field effect Effects 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 206010034133 Pathogen resistance Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
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Abstract
The invention provides a natural sound effect processing circuit. The circuit comprises a first integrated operational amplifier, a second integrated operational amplifier, input coupling capacitors from the first to the fourth, a first high-pitch compensation capacitor, a second high-pitch compensation capacitor, filter capacitors from the first to the fourth, a first output coupling capacitor, a second output coupling capacitor, resistors from the first to the eighth. According to the natural sound effect processing circuit, high-frequency noise can be effectively inhibited, and the harmonic property of output audio frequency is hardly influenced by high-frequency noise due to the high-pitch compensation and signal amplification, so that the audio frequency output by the processing circuit is high in quality. Furthermore, elements with certain physical properties are selected in the circuit, so that the audio quality of the processing circuit can be better optimized.
Description
Technical field
The present invention relates to a kind of natural sound effect process circuit.
Background technology
DAB circuit will necessarily carry the high-frequency noise of non-audio signals, existing audio frequency during digital-to-analogue conversion
Signal processing circuit typically carries out suppression process to high-frequency noise, however, also inhibits the overtone characteristic of audio signal simultaneously, makes
Audio signal loses nature sound and has the overtone characteristic echoing.
Electronic product typically requires low power dissipation design, and audio signal processing circuit typically adopts the voltage of 3.3V or lower to supply
Electricity, this kind of audio signal processing circuit by low voltage power supply still can not handle the natural characteristic of audio signal at present well.
Content of the invention
For the deficiencies in the prior art, the purpose of the present invention is intended to provide one kind can solve above-mentioned technical problem naturetone
Effect process circuit.
For achieving the above object, the present invention adopts the following technical scheme that：
A kind of natural sound effect process circuit, it includes the first integrated transporting discharging, the second integrated transporting discharging, the first input coupling electric capacity
To the 4th input coupling electric capacity, the first high pitch compensating electric capacity and the second high pitch compensating electric capacity, the first filter capacitor to the 4th filtering
Electric capacity, the first output coupling capacitor and the second output coupling capacitor, first resistor are to the tenth resistance；
The in-phase end of this first integrated transporting discharging passes sequentially through first resistor and the left sound of the first input coupling capacitance connection audio frequency
Road differential signal positive input terminal or audio frequency L channel mono signal end, accordingly, the end of oppisite phase of this first integrated transporting discharging passes sequentially through
Second resistance and the second input coupling capacitance connection audio frequency L channel differential signal negative input end or earth terminal；First high pitch compensates
One end of electric capacity connects the in-phase end of the first integrated transporting discharging, and the other end of the first high pitch compensating electric capacity connects the first integrated transporting discharging
End of oppisite phase, connects the outfan of the first integrated transporting discharging also by 3rd resistor；The in-phase end of the first integrated transporting discharging is also by first
Filter capacitor is grounded, and the end of oppisite phase of the first integrated transporting discharging connects the outfan of the first integrated transporting discharging also by the second filter capacitor；
One end of this first high pitch compensating electric capacity also by the 4th resistance and the 5th resistance eutral grounding, between the 4th resistance and the 5th resistance
Node passes through the first capacity earth, is also connected with the first power supply, connects the power end of the first integrated transporting discharging also by the 6th resistance；
The in-phase end of this second integrated transporting discharging passes sequentially through the 7th resistance and the right sound of the 3rd input coupling capacitance connection audio frequency
Road differential signal positive input terminal or audio frequency R channel mono signal end, accordingly, the end of oppisite phase of this second integrated transporting discharging passes sequentially through
8th resistance and the 4th input coupling capacitance connection audio frequency R channel differential signal negative input end or earth terminal；This second integrated fortune
The in-phase end put is grounded also by the 3rd filter capacitor, and the end of oppisite phase of this second integrated transporting discharging connects also by the 4th filter capacitor
The outfan of the second integrated transporting discharging；One end of this second high pitch compensating electric capacity connects the in-phase end of this second integrated transporting discharging, also logical
Cross the 9th resistance and connect the first power supply, the other end of this second high pitch compensating electric capacity connects the end of oppisite phase of this second integrated transporting discharging,
Connect the outfan of the second integrated transporting discharging also by the tenth resistance；
The outfan of this first integrated transporting discharging and the second integrated transporting discharging is defeated by the first output coupling capacitor and second respectively
Go out coupled capacitor and connect output port.
Further, this natural sound effect process circuit also includes the 11st resistance and the 12nd resistance, and the 11st resistance is even
It is connected between one end and the in-phase end of this first integrated transporting discharging of this first high pitch compensating electric capacity, the 12nd resistance is connected to this
Between the other end of the first high pitch compensating electric capacity and the end of oppisite phase of this first integrated transporting discharging.
Further, this natural sound effect process circuit also includes the 13rd resistance and the 14th resistance, the 13rd resistance
It is connected between one end and the in-phase end of this second integrated transporting discharging of this second high pitch compensating electric capacity, the 14th resistance is connected to
Between the other end of this second high pitch compensating electric capacity and the end of oppisite phase of this second integrated transporting discharging.
Further, this natural sound effect process circuit also includes the 15th resistance to the 17th resistance, the second electric capacity to
Five electric capacity；Second source connects the power end of the first integrated transporting discharging, and the second electric capacity and the 3rd electric capacity are in parallel connection, the second electric capacity
One end connect second source, the second electric capacity the other end ground connection, also by the 15th resistance eutral grounding, one end of the 16th resistance
It is connected between the first output coupling capacitor and output port, the other end ground connection of the 16th resistance, one end of the 17th resistance
It is connected between the second output coupling capacitor and output port, the other end ground connection of the 17th resistance；One end of 4th electric capacity is even
Connect between the first input coupling electric capacity and first resistor, the other end of the 4th electric capacity connects the second input coupling electric capacity and the second electricity
Between resistance；One end of 5th electric capacity connects between the 3rd input coupling electric capacity and the 7th resistance, and the other end of the 5th electric capacity is even
Connect between the 4th input coupling electric capacity and the 8th resistance.
Further, the first input coupling electric capacity is tantalum electric capacity or thin-film capacitor to the 4th coupled capacitor.
Further, to be 0.47 microfarad micro- to 10 for the capacitance value range of the first input coupling electric capacity to the 4th coupled capacitor
Method.
Further, the capacitance swing of the first filter capacitor to the 4th filter capacitor is 5 pico farads to 100 pico farads.
Further, the first integrated transporting discharging and the second integrated transporting discharging are the ic core of FET structure.
Further, the first output coupling capacitor and the second output coupling capacitor is tantalum electric capacity or thin-film electro is perhaps electrolysed
Electric capacity.
Further, to be 2.2 micro- for the capacitance span of the first output coupling capacitor and the second output coupling capacitor
Method is to 100 microfarads.
Beneficial effects of the present invention are as follows：
Foregoing invention can effectively suppress high-frequency noise, meanwhile, compensated by high pitch and signal amplifies so that exporting audio frequency
Overtone characteristic is not inhibited the impact of high-frequency noise substantially, so that the audio quality that present treatment circuit is exported is high.In addition,
This circuit selects the element of certain physical characteristics, can more optimize the audio quality of present treatment circuit.
Brief description
Fig. 1 is the circuit diagram of the better embodiment of natural sound effect process circuit of the present invention.
Fig. 2 is the circuit diagram of another better embodiment of natural sound effect process circuit of the present invention.
Specific embodiment
Below in conjunction with accompanying drawing and specific embodiment, the present invention is described further：
Refer to Fig. 1 and Fig. 2, the present invention relates to a kind of natural sound effect process circuit, that is, be used for generating the sound of natural sound effect
Audio signalprocessing circuit, its better embodiment includes integrated transporting discharging U1, integrated transporting discharging U2, resistance R1 to resistance R17 and electric capacity
C1 to electric capacity C17.
The in-phase end of this integrated transporting discharging U1 passes sequentially through resistance R1, resistance R2 and electric capacity C1 connects audio frequency L channel difference letter
Number positive input terminal SPK_LP or audio frequency L channel mono signal end SPK_LP0, accordingly, the end of oppisite phase of this integrated transporting discharging U1 leads to successively
Cross resistance R3, resistance R4 and electric capacity C2 connects audio frequency L channel differential signal negative input end SPK_LN or earth terminal GND.Electric capacity
One end of C14 connects between resistance R2 and resistance R1, and the other end of electric capacity C14 connects between resistance R4 and resistance R3, also by
Resistance R5 connects the outfan of integrated transporting discharging U1.The in-phase end of integrated transporting discharging U1 is grounded also by electric capacity C3, integrated transporting discharging U1's
End of oppisite phase connects the outfan of integrated transporting discharging U1 also by electric capacity C4.One end of this electric capacity C14 is also by resistance R6 and resistance R7
Ground connection, the node between resistance R6 and resistance R7 is grounded by electric capacity C5, is also connected with power supply VCOM.
The in-phase end of this integrated transporting discharging U2 passes sequentially through resistance R9, resistance R10 and electric capacity C6 connects audio frequency R channel difference
Signal positive input terminal SPK_RP or audio frequency R channel mono signal end SPK_RP0, accordingly, the end of oppisite phase of this integrated transporting discharging U2 is successively
Audio frequency R channel differential signal negative input end SPK_RN or earth terminal GND is connected by resistance R12, resistance R11 and electric capacity C7.Should
The in-phase end of integrated transporting discharging U2 is grounded also by electric capacity C8, and the end of oppisite phase of this integrated transporting discharging U2 connects integrated fortune also by electric capacity C9
Put the outfan of U2.One end of this electric capacity C15 connects between this resistance R10 and resistance R9, connects power supply also by resistance R14
The other end of VCOM, this electric capacity C15 connects between this resistance R11 and resistance R12, connects integrated transporting discharging U2 also by resistance R13
Outfan.The outfan of this integrated transporting discharging U1 and integrated transporting discharging U2 passes through electric capacity C10 and electric capacity C11 respectively and connects output port
One end of 10, resistance R16 is connected between electric capacity C10 and output port 10, the other end ground connection of resistance R16, and the one of resistance R17
End is connected between electric capacity C11 and output port 10, the other end ground connection of resistance R17.Power vd D connects the electricity of integrated transporting discharging U1
Source, resistance R8 is connected between this power supply VCOM and power vd D, and electric capacity C12 and electric capacity C13 is in parallel connection, electric capacity C12's
One end connects power vd D, and the other end ground connection of electric capacity C12, also by resistance R15 ground connection.
The circuit module of above-mentioned resistance R7, electric capacity C5 and resistance R8 composition is used for generating the ginseng that supply integrated transporting discharging U1 uses
Examine voltage.
Electric capacity C1, electric capacity C2, electric capacity C6 and electric capacity C7 are input coupling electric capacity, and the performance for making this circuit is more preferable, this
In embodiment, electric capacity C1, electric capacity C2, electric capacity C6 and electric capacity C7 are tantalum electric capacity or thin-film electro perhaps electrochemical capacitor, capacitance value range
For 0.47 microfarad to 22 microfarads.
Electric capacity C14 and electric capacity C15 is high pitch compensating electric capacity.
Electric capacity C3, electric capacity C4, electric capacity C8 and electric capacity C9 are filter capacitor, and four capacitance swing is 10 pico farads to 47 skins
During method, four both can suppress high-frequency noise, and the impact to the overtone characteristic of audio frequency is also minimum.
In the present embodiment, integrated transporting discharging U1 and integrated transporting discharging U2 is FET (Field Effect Transistor, field effect
Pipe) structure IC chip.
Electric capacity C10 and electric capacity C11 is output coupling capacitor, for make this circuit performance more preferably, electric capacity C10 and electric capacity
C11 is tantalum electric capacity or thin-film electro perhaps electrochemical capacitor, and the capacitance span of three is 2.2 microfarads to 100 microfarads.
Resistance R2, resistance R4 and resistance R5 are used for controlling the amplification of integrated transporting discharging U1；Resistance R10, resistance R11 and electricity
Resistance R13 is used for controlling the amplification of integrated transporting discharging U2.
This circuit also includes electric capacity C16 and electric capacity C17, and one end of electric capacity C16 connects between electric capacity C6 and resistance R10, electricity
The other end holding C16 connects between electric capacity C7 and resistance R11.One end of electric capacity C17 connects between electric capacity C1 and resistance R2, electric capacity
The other end of C17 connects between electric capacity C2 and resistance R4.
Foregoing invention can effectively suppress high-frequency noise, meanwhile, compensated by high pitch and signal amplifies so that exporting audio frequency
Overtone characteristic is not inhibited the impact of high-frequency noise substantially, so that the audio quality that present treatment circuit is exported is high.In addition,
This circuit selects the element of certain physical characteristics, can more optimize the audio quality of present treatment circuit.
For a person skilled in the art, can technical scheme as described above and design, make other each
Plant corresponding change and deform, and all these changes and deforms the protection model that all should belong to the claims in the present invention
Within enclosing.
Claims (10)
1. a kind of natural sound effect process circuit it is characterised in that：It includes the first integrated transporting discharging, the second integrated transporting discharging, first defeated
Enter coupled capacitor to the 4th input coupling electric capacity, the first high pitch compensating electric capacity and the second high pitch compensating electric capacity, the first filter capacitor
To the 4th filter capacitor, the first output coupling capacitor and the second output coupling capacitor, first resistor to the tenth resistance；
The in-phase end of this first integrated transporting discharging passes sequentially through first resistor and the first input coupling capacitance connection audio frequency L channel is poor
Sub-signal positive input terminal or audio frequency L channel mono signal end, accordingly, the end of oppisite phase of this first integrated transporting discharging passes sequentially through second
Resistance and the second input coupling capacitance connection audio frequency L channel differential signal negative input end or earth terminal；First high pitch compensating electric capacity
One end connect the in-phase end of the first integrated transporting discharging, the other end of the first high pitch compensating electric capacity connects the anti-phase of the first integrated transporting discharging
End, connects the outfan of the first integrated transporting discharging also by 3rd resistor；The in-phase end of the first integrated transporting discharging is also by the first filtering
Capacity earth, the end of oppisite phase of the first integrated transporting discharging connects the outfan of the first integrated transporting discharging also by the second filter capacitor；This
One end of one high pitch compensating electric capacity is also by the 4th resistance and the 5th resistance eutral grounding, the node between the 4th resistance and the 5th resistance
By the first capacity earth, it is also connected with the first power supply, connect the power end of the first integrated transporting discharging also by the 6th resistance；This second
The in-phase end of integrated transporting discharging passes sequentially through the 7th resistance and the 3rd input coupling capacitance connection audio frequency R channel differential signal is just defeated
Enter end or audio frequency R channel mono signal end, accordingly, the end of oppisite phase of this second integrated transporting discharging passes sequentially through the 8th resistance and the 4th
Input coupling capacitance connection audio frequency R channel differential signal negative input end or earth terminal；The in-phase end of this second integrated transporting discharging is also logical
Cross the 3rd filter capacitor ground connection, the end of oppisite phase of this second integrated transporting discharging connects the second integrated transporting discharging also by the 4th filter capacitor
Outfan；One end of this second high pitch compensating electric capacity connects the in-phase end of this second integrated transporting discharging, connects also by the 9th resistance
First power supply, the other end of this second high pitch compensating electric capacity connects the end of oppisite phase of this second integrated transporting discharging, also by the tenth resistance
Connect the outfan of the second integrated transporting discharging；
The outfan of this first integrated transporting discharging and the second integrated transporting discharging passes through the first output coupling capacitor and the second output coupling respectively
Close capacitance connection output port.
2. natural sound effect process circuit as claimed in claim 1 it is characterised in that：This natural sound effect process circuit also includes
11 resistance and the 12nd resistance, the 11st resistance is connected to one end and this first integrated transporting discharging of this first high pitch compensating electric capacity
In-phase end between, the 12nd resistance is connected to the other end of this first high pitch compensating electric capacity and the anti-of this first integrated transporting discharging
Between mutually holding.
3. natural sound effect process circuit as claimed in claim 2 it is characterised in that：This natural sound effect process circuit also includes
13 resistance and the 14th resistance, the 13rd resistance is connected to one end of this second high pitch compensating electric capacity and this is second integrated
Between the in-phase end of amplifier, the 14th resistance is connected to the other end and this second integrated transporting discharging of this second high pitch compensating electric capacity
End of oppisite phase between.
4. natural sound effect process circuit as claimed in claim 3 it is characterised in that：This natural sound effect process circuit also includes
15 resistance are to the 17th resistance, the second electric capacity to the 5th electric capacity；The power end of second source connection the first integrated transporting discharging, second
Electric capacity and the 3rd electric capacity are in parallel connection, and one end of the second electric capacity connects second source, and the other end ground connection of the second electric capacity is also logical
Cross the 15th resistance eutral grounding, one end of the 16th resistance is connected between the first output coupling capacitor and output port, the 16th
The other end ground connection of resistance, one end of the 17th resistance is connected between the second output coupling capacitor and output port, and the 17th
The other end ground connection of resistance；One end of 4th electric capacity connects between the first input coupling electric capacity and first resistor, the 4th electric capacity
The other end connects between the second input coupling electric capacity and second resistance；One end of 5th electric capacity connect the 3rd input coupling electric capacity and
Between 7th resistance, the other end of the 5th electric capacity connects between the 4th input coupling electric capacity and the 8th resistance.
5. natural sound effect process circuit as claimed in claim 1 it is characterised in that：First input coupling electric capacity is to the 4th input
Coupled capacitor is tantalum electric capacity or thin-film electro perhaps electrochemical capacitor.
6. natural sound effect process circuit as claimed in claim 5 it is characterised in that：First input coupling electric capacity is to the 4th input
The capacitance value range of coupled capacitor is 0.47 microfarad to 10 microfarads.
7. natural sound effect process circuit as claimed in claim 1 it is characterised in that：First filter capacitor is to the 4th filter capacitor
Capacitance swing be 5 pico farads to 100 pico farads.
8. natural sound effect process circuit as claimed in claim 1 it is characterised in that：First integrated transporting discharging and the second integrated transporting discharging
Ic core for FET structure.
9. natural sound effect process circuit as claimed in claim 1 it is characterised in that：First output coupling capacitor and the second output
Coupled capacitor is tantalum electric capacity or thin-film electro perhaps electrochemical capacitor.
10. natural sound effect process circuit as claimed in claim 9 it is characterised in that：First output coupling capacitor and second defeated
The capacitance span going out coupled capacitor is 2.2 microfarads to 100 microfarads.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410084180.6A CN103826185B (en) | 2014-03-07 | 2014-03-07 | Natural sound effect processing circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410084180.6A CN103826185B (en) | 2014-03-07 | 2014-03-07 | Natural sound effect processing circuit |
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| Publication Number | Publication Date |
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| CN103826185A CN103826185A (en) | 2014-05-28 |
| CN103826185B true CN103826185B (en) | 2017-02-08 |
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ID=50760969
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410084180.6A Active CN103826185B (en) | 2014-03-07 | 2014-03-07 | Natural sound effect processing circuit |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106454641B (en) * | 2016-09-21 | 2019-06-21 | 四川长虹电器股份有限公司 | It can inhibit the circuit of sound accompaniment noise |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1041758A (en) * | 1996-07-24 | 1998-02-13 | Toshiba Corp | Semiconductor integrated circuit |
| CN101014209A (en) * | 2007-01-19 | 2007-08-08 | 电子科技大学 | Full band natural sound effect audio directional loudspeaker |
| CN101715158A (en) * | 2008-10-03 | 2010-05-26 | 瑞昱半导体股份有限公司 | Audio signal apparatus and method |
| CN201956977U (en) * | 2010-12-29 | 2011-08-31 | 意法半导体研发(深圳)有限公司 | Audio amplification circuit with improved noise characteristics |
| CN203813946U (en) * | 2014-03-07 | 2014-09-03 | 深圳市晶科源科技有限公司 | Natural sound effect processing circuit |
-
2014
- 2014-03-07 CN CN201410084180.6A patent/CN103826185B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1041758A (en) * | 1996-07-24 | 1998-02-13 | Toshiba Corp | Semiconductor integrated circuit |
| CN101014209A (en) * | 2007-01-19 | 2007-08-08 | 电子科技大学 | Full band natural sound effect audio directional loudspeaker |
| CN101715158A (en) * | 2008-10-03 | 2010-05-26 | 瑞昱半导体股份有限公司 | Audio signal apparatus and method |
| CN201956977U (en) * | 2010-12-29 | 2011-08-31 | 意法半导体研发(深圳)有限公司 | Audio amplification circuit with improved noise characteristics |
| CN203813946U (en) * | 2014-03-07 | 2014-09-03 | 深圳市晶科源科技有限公司 | Natural sound effect processing circuit |
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