CN216820083U - A3D audio circuit for stereo set - Google Patents
A3D audio circuit for stereo set Download PDFInfo
- Publication number
- CN216820083U CN216820083U CN202220078162.7U CN202220078162U CN216820083U CN 216820083 U CN216820083 U CN 216820083U CN 202220078162 U CN202220078162 U CN 202220078162U CN 216820083 U CN216820083 U CN 216820083U
- Authority
- CN
- China
- Prior art keywords
- unit
- feedback
- operational amplifier
- electrically connected
- feedback unit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R5/00—Stereophonic arrangements
- H04R5/04—Circuit arrangements, e.g. for selective connection of amplifier inputs/outputs to loudspeakers, for loudspeaker detection, or for adaptation of settings to personal preferences or hearing impairments
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Stereophonic System (AREA)
Abstract
The utility model discloses a 3D sound effect circuit for a sound device, which comprises: a first input terminal, a second input terminal, a first output terminal and a second output terminal; the first operational amplifier unit is electrically connected with the first input end and the first output end; the second operational amplifier unit is electrically connected with the second input end and the second output end; the first feedback unit is electrically connected with the second output end; the second feedback unit is electrically connected with the second output end and the first feedback unit; the third feedback unit is electrically connected with the first output end; the fourth feedback unit is electrically connected with the first output end and the third feedback unit; a control unit and other components; the sound field of the sound box is widened, and an excellent stereo surrounding playing effect is obtained.
Description
Technical Field
The utility model relates to the technical field of an external playback circuit, in particular to a 3D sound circuit for a sound box. A means of
Background
In order to provide more comfortable effect for consumers when listening to music, the effect of improving 3D sound effect is realized by drawing the sound field close to the earphones, and the sound field needs to be drawn wide on the sound playing device to create the root stereo surround effect.
The 3D sound effect of the existing earphone or external sound equipment is mainly software adjustment, the hardware is small, the effect is generally complicated or the circuit adjustment mode is too complex, the application range is small, and the physical layout is limited to a certain extent.
Accordingly, there is a need for a 3D sound effect circuit for a sound that can solve one or more of the above problems.
SUMMERY OF THE UTILITY MODEL
In order to solve one or more problems in the prior art, the utility model provides a 3D sound effect circuit for a sound box. The technical scheme adopted by the utility model for solving the problems is as follows: a 3D sound effect circuit for a sound, comprising: a first input terminal, a second input terminal, a first output terminal and a second output terminal; the first operational amplifier unit is electrically connected with the first input end and the first output end;
the first feedback network is electrically connected with the first operational amplifier unit and the first output end;
the second operational amplifier unit is electrically connected with the second input end and the second output end;
the second feedback network is electrically connected with the second operational amplifier unit and the second output end;
the first feedback unit is electrically connected with the second output end;
the second feedback unit is electrically connected with the second output end and the first feedback unit;
the third feedback unit is electrically connected with the first output end;
the fourth feedback unit is electrically connected with the first output end and the third feedback unit;
the control unit is electrically connected with the first operational amplifier unit, the second operational amplifier unit, the first feedback unit, the second feedback unit, the third feedback unit and the fourth feedback unit, the control unit controls the first feedback unit and the second feedback unit to feed back to the first operational amplifier unit, and the control unit controls the third feedback unit and the fourth feedback unit to feed back to the second operational amplifier unit.
Further, the first feedback network and the second feedback network are parallel negative feedback circuits.
Further, the control unit comprises a plurality of switches.
Furthermore, the first feedback unit and the second feedback unit are electrically connected with the negative phase end of the first operational amplifier unit through the control unit;
the third feedback unit and the fourth feedback unit are electrically connected with the negative phase end of the second operational amplifier unit through the control unit.
Further, the first input end is electrically connected to the positive phase terminal of the first operational amplifier unit through a capacitor, and the second input end is electrically connected to the positive phase terminal of the second operational amplifier unit through a capacitor.
Furthermore, the control unit is electrically connected with the negative phase end of the first operational amplifier unit and the negative phase end of the second operational amplifier unit through capacitors;
the first feedback network is directly and electrically connected with the negative phase end of the first operational amplifier unit, and the second feedback network is directly and electrically connected with the negative phase end of the second operational amplifier unit.
Further, the control unit includes: the feedback circuit comprises a first switch, a second switch, a third switch and a fourth switch, wherein the first switch is used for controlling the third feedback unit, the first switch and the second switch are used for controlling the fourth feedback unit, the third switch is used for controlling the first feedback unit, and the third switch and the fourth switch are used for controlling the second feedback unit.
The beneficial effects obtained by the utility model are as follows: according to the utility model, the first operational amplifier unit, the first feedback network, other circuits and components are connected together through a smart structure, so that a better 3D sound effect is provided for a consumer on an external sound device in a hardware mode, the sound fields of the two external speakers are widened through the circuit, the stereo surround sound effect is integrally improved, the method is more direct and has wider application range compared with a software adjusting mode, and the adjustment by using mcu or cpu in combination with software in the later period is more convenient. The practical value of the utility model is greatly improved.
Drawings
FIG. 1 is a schematic block diagram of the present invention;
fig. 2 is a schematic diagram of the implementation of the present invention.
[ reference numerals ]
101. first operational amplifier unit
102. first feedback network
103. first feedback unit
104. second feedback unit
201. second operational amplifier unit
202. second feedback network
203. third feedback unit
204. fourth feedback unit
301. control unit
L IN. first input terminal
R IN DEG.second input terminal
L OUT first output terminal
And R OUT.second output terminal.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.
As shown in fig. 1-2, the present invention discloses a 3D sound effect circuit for a sound device, comprising: a first input terminal L IN, a second input terminal R IN, a first output terminal L OUT, and a second output terminal R OUT; the first operational amplifier unit 101 is electrically connected with a first input end L IN and a first output end L OUT, and the first operational amplifier unit 101 is electrically connected with a first output end L OUT and a second input end L IN;
the first feedback network 102, where the first feedback network 102 is electrically connected to the first operational amplifier unit 101 and the first output terminal L OUT, and is used for self-feedback adjustment of the first operational amplifier unit 101;
the second operational amplifier unit 201, the second operational amplifier unit 201 is electrically connected with a second input end rin and a second output end R OUT;
a second feedback network 202, where the second feedback network 202 is electrically connected to the second operational amplifier unit 201 and a second output end R OUT, and is used for self-feedback adjustment of the second operational amplifier unit 201;
the first feedback unit 103, wherein the first feedback unit 103 is electrically connected with the second output end R OUT;
a second feedback unit 104, wherein the second feedback unit 104 is electrically connected to a second output end R OUT and the first feedback unit 103;
a third feedback unit 203, wherein the third feedback unit 203 is electrically connected to the first output terminal L OUT;
a fourth feedback unit 204, wherein the fourth feedback unit 204 is electrically connected to the first output terminal L OUT and the third feedback unit 203;
the control unit 301 is electrically connected to the first operational amplifier unit 101, the second operational amplifier unit 201, the first feedback unit 103, the second feedback unit 104, the third feedback unit 203, and the fourth feedback unit 204, the control unit 301 controls the first feedback unit 103 and the second feedback unit 104 to feed back to the first operational amplifier unit 101, and the control unit 301 controls the third feedback unit 203 and the fourth feedback unit 204 to feed back to the second operational amplifier unit 201.
It should be noted that the control unit 301 may be a switch for connection control of the MCU, the CPU, or the MCU, as shown in fig. 2, the control unit 301 is four switches (SW1-4), and the control unit 301 controls four feedback units, so as to feed back the operational amplifier at a required time and feed back a signal of one unit or two units, so that the operational amplifier receives a suitable feedback signal, and the finally output audio signal can obtain an excellent stereo surround effect after being played by an external sound analysis. The first and second op- amp units 101 and 201 are op-amps and are typically powered at +5V, as shown in fig. 2, with their feedback networks (at resistor R2) tied to the input power (through resistor R1).
Specifically, as shown in fig. 1 and fig. 2, the first feedback network 102 and the second feedback network 202 are parallel negative feedback circuits, such as: the first feedback network 102 is composed of R2 in fig. 2. The control unit 301 comprises a number of switches, SW1-4 in fig. 2. The first feedback unit 103 and the second feedback unit 104 are electrically connected with the negative phase end of the first operational amplifier unit 101 through the control unit 301; the third feedback unit 203 and the fourth feedback unit 204 are electrically connected with the negative phase end of the second operational amplifier unit 201 through the control unit 301. The first input terminal L IN is electrically connected to the positive terminal of the first operational amplifier unit 101 through a capacitor C2, and the second input terminal R IN is electrically connected to the positive terminal of the second operational amplifier unit 201 through a capacitor C6. The control unit 301 is electrically connected with the negative phase end of the first operational amplifier unit 101 and the negative phase end of the second operational amplifier unit 201 through capacitors C1 and C5; the first feedback network 102 is directly electrically connected to the negative terminal of the first operational amplifier unit 101, and the second feedback network 202 is directly electrically connected to the negative terminal of the second operational amplifier unit 201.
Specifically, as shown in fig. 2, the control unit 301 includes: a first switch SW1, a second switch SW2, a third switch SW3 and a fourth switch SW4, wherein the first switch SW1 is used for controlling the third feedback unit 203, the first switch SW1 and the second switch SW2 are used for controlling the fourth feedback unit 204, the third switch SW3 is used for controlling the first feedback unit 103, and the third switch SW3 and the fourth switch SW4 are used for controlling the second feedback unit 104.
The first feedback unit 103 includes: r5, R3 and C4, wherein C4 is grounded, and R3 is connected to a first output end L OUT; the second feedback unit 104 includes: c3, R4, wherein R4 is connected to the first output terminal L OUT; the first feedback network 102 comprises R2 and R1, wherein R2 is connected to the first output terminal L OUT and the negative phase terminal of the operational amplifier U1A, and R1 is connected to R2 and the operational amplifier power ground 11, and the second feedback network 202 is similarly R6 and R7. Similarly, the three feedback units 203 include R8, R10 and C8, and the fourth feedback unit 204 includes C7 and R9.
When the operational amplifier is used, the first feedback unit 103 and the second feedback unit 104, or the first feedback unit 103 feeds back the output signal of the second operational amplifier unit 201 to the negative phase terminal of the first operational amplifier unit 101, so as to adjust the output signal of the first operational amplifier unit 101; the adjustment of the second operational amplifier unit 201 is the same. The output pairs of the two operational amplifiers U1A and U2A are adjusted, the sound effect output by the two output ends is better, the sound field of an external sound playing device is widened, and an excellent stereo surrounding effect is obtained.
In summary, the first operational amplifier unit 101, the first feedback network 102, and other circuits and components are connected together through a smart structure, so that a better 3D sound effect provided to a consumer in playing out a sound in a hardware manner is achieved, the sound fields of the two speakers played out are widened through the circuit, the stereo surround sound effect is integrally improved, the method is more direct and is more applicable to a wider scene compared with a software adjustment method, and the adjustment by using mcu or cpu in combination with software in a later stage is more convenient. The practical value of the utility model is greatly improved.
The above-described examples merely represent one or more embodiments of the present invention, which are described in greater detail and detail, but are not to be construed as limiting the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the spirit of the utility model, which falls within the scope of the utility model. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (7)
1. A 3D sound effect circuit for a sound, comprising: the circuit comprises a first input end, a second input end, a first output end and a second output end, and is characterized in that a first operational amplifier unit is electrically connected with the first input end and the first output end;
the first feedback network is electrically connected with the first operational amplifier unit and the first output end;
the second operational amplifier unit is electrically connected with the second input end and the second output end;
the second feedback network is electrically connected with the second operational amplifier unit and the second output end;
the first feedback unit is electrically connected with the second output end;
the second feedback unit is electrically connected with the second output end and the first feedback unit;
the third feedback unit is electrically connected with the first output end;
the fourth feedback unit is electrically connected with the first output end and the third feedback unit;
the control unit is electrically connected with the first operational amplifier unit, the second operational amplifier unit, the first feedback unit, the second feedback unit, the third feedback unit and the fourth feedback unit, the control unit controls the first feedback unit and the second feedback unit to feed back to the first operational amplifier unit, and the control unit controls the third feedback unit and the fourth feedback unit to feed back to the second operational amplifier unit.
2. The 3D sound effect circuit for the sound box according to claim 1, wherein the first feedback network and the second feedback network are parallel negative feedback circuits.
3. The 3D sound effect circuit for a sound box according to claim 1, wherein the control unit comprises a plurality of switches.
4. The 3D sound effect circuit for the sound box according to claim 1, wherein the first feedback unit and the second feedback unit are electrically connected with a negative phase terminal of the first operational amplifier unit through the control unit;
the third feedback unit and the fourth feedback unit are electrically connected with the negative phase end of the second operational amplifier unit through the control unit.
5. The 3D sound effect circuit for a sound box according to claim 1, wherein the first input terminal is electrically connected to the positive phase terminal of the first operational amplifier unit through a capacitor, and the second input terminal is electrically connected to the positive phase terminal of the second operational amplifier unit through a capacitor.
6. The 3D sound effect circuit for the sound box according to claim 1, wherein the control unit is electrically connected with the negative phase end of the first operational amplifier unit and the negative phase end of the second operational amplifier unit through capacitors;
the first feedback network is directly and electrically connected with the negative phase end of the first operational amplifier unit, and the second feedback network is directly and electrically connected with the negative phase end of the second operational amplifier unit.
7. The 3D sound effect circuit for a sound box according to claim 1, wherein the control unit comprises: the first switch is used for controlling the third feedback unit, the first switch is used for controlling the second feedback unit, the second switch is used for controlling the fourth feedback unit, the third switch is used for controlling the first feedback unit, and the third switch is used for controlling the fourth switch.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123026491 | 2021-12-03 | ||
| CN2021230264911 | 2021-12-03 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216820083U true CN216820083U (en) | 2022-06-24 |
Family
ID=81368257
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220078162.7U Active CN216820083U (en) | 2021-12-03 | 2022-01-12 | A3D audio circuit for stereo set |
| CN202210030900.5A Pending CN114449416A (en) | 2021-12-03 | 2022-01-12 | 3D sound effect circuit for sound equipment |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210030900.5A Pending CN114449416A (en) | 2021-12-03 | 2022-01-12 | 3D sound effect circuit for sound equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN216820083U (en) |
-
2022
- 2022-01-12 CN CN202220078162.7U patent/CN216820083U/en active Active
- 2022-01-12 CN CN202210030900.5A patent/CN114449416A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| CN114449416A (en) | 2022-05-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203761556U (en) | Double-microphone noise reduction earphone | |
| WO2016131266A1 (en) | Method and apparatus for adjusting sound field of earphone, terminal and earphone | |
| CN103096211B (en) | The filter circuit of microphone | |
| WO2010138515A2 (en) | Dynamic contoured-sound/subwoofer-synthesis audio system | |
| KR20190035460A (en) | Asymmetric multi-channel audio dynamic range processing | |
| CN216820083U (en) | A3D audio circuit for stereo set | |
| CN104683922A (en) | Ground-loop noise suppression system and method for earphones | |
| CN104703097B (en) | Audio ground loop noise suppressing system and method | |
| CN101150298A (en) | Muting circuit | |
| CN209105403U (en) | Multiple-unit earphone power governor | |
| CN216820082U (en) | A3D audio circuit for earphone | |
| US5175768A (en) | Method and apparatus for enhancing the stereo effect in headsets having cross coupling voice coils | |
| CN205071296U (en) | Audio amplifier frequency dividing circuit | |
| CN209692708U (en) | A kind of power amplifier apparatus | |
| WO2019015053A1 (en) | Audio encoding-enabled in-ear earbud and earphone | |
| CN207854114U (en) | A kind of change of voice earphone | |
| CN216930298U (en) | Sound effect low frequency compensation circuit of pure analog adjustment | |
| CN206024090U (en) | A kind of wired band's stage monitoring system | |
| CN113645560A (en) | Method and device for controlling voice box group and voice box equipment | |
| CN220067673U (en) | Circuit for improving sound playing effect and sound system using same | |
| CN213280015U (en) | Audio circuit and multifunctional sound box using same | |
| CN221615130U (en) | Liner machine loudspeaker control system | |
| CN204442648U (en) | Earphone ground loop noise suppresses system | |
| CN203086682U (en) | Variable-impedance receiver | |
| CN213602630U (en) | Line loss compensator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |