CN215420720U - Tone control circuit - Google Patents
Tone control circuit Download PDFInfo
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- CN215420720U CN215420720U CN202120988218.8U CN202120988218U CN215420720U CN 215420720 U CN215420720 U CN 215420720U CN 202120988218 U CN202120988218 U CN 202120988218U CN 215420720 U CN215420720 U CN 215420720U
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- 239000003990 capacitor Substances 0.000 claims description 28
- 230000003321 amplification Effects 0.000 claims description 13
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 13
- 238000001914 filtration Methods 0.000 claims description 3
- 230000000087 stabilizing effect Effects 0.000 claims description 2
- 230000001105 regulatory effect Effects 0.000 claims 6
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000002238 attenuated effect Effects 0.000 description 4
- QVZZPLDJERFENQ-NKTUOASPSA-N bassianolide Chemical compound CC(C)C[C@@H]1N(C)C(=O)[C@@H](C(C)C)OC(=O)[C@H](CC(C)C)N(C)C(=O)[C@@H](C(C)C)OC(=O)[C@H](CC(C)C)N(C)C(=O)[C@@H](C(C)C)OC(=O)[C@H](CC(C)C)N(C)C(=O)[C@@H](C(C)C)OC1=O QVZZPLDJERFENQ-NKTUOASPSA-N 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 1
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Abstract
The utility model provides a tone control circuit, and belongs to the field of sound box circuits. The utility model comprises a high pitch adjusting unit, a low pitch adjusting unit, an operational amplifying unit and a gain adjusting unit, wherein the input ends of the high pitch adjusting unit and the low pitch adjusting unit are respectively input with a sound source to be adjusted, the output ends of the high pitch adjusting unit and the low pitch adjusting unit are connected with the same input end of the operational amplifying unit, the output end of the operational amplifying unit is connected with the input end of the gain adjusting unit, and the gain adjusting unit outputs the adjusted sound source. The utility model has the beneficial effects that: the high pitch and low pitch components output to the loudspeaker can be adjusted, good-hearing sounds are provided for different people and different music, and the requirement of people on hearing is met.
Description
Technical Field
The present disclosure relates to speaker circuits, and particularly to a tone control circuit.
Background
The professional active sound box is suitable for occasions such as performances, nightclubs and bars, a high-power bass unit and a high-power horn are arranged in the sound box, so that a power amplifier circuit of the professional active sound box is required to have enough power, and the remote sound radiation is good.
The professional active sound box generally comprises an input circuit, an audio processing circuit, a tone control circuit, a frequency dividing circuit and the like, and high and low tones belong to the same sound source because the tone processing circuit is arranged in front of the frequency dividing circuit, so that the audio frequency can be adjusted simultaneously when the tones are adjusted, and the hearing requirements of people cannot be met.
SUMMERY OF THE UTILITY MODEL
To solve the problems in the prior art, the present invention provides a tone control circuit.
The utility model comprises a high pitch adjusting unit, a low pitch adjusting unit, an operational amplifying unit and a gain adjusting unit, wherein the input ends of the high pitch adjusting unit and the low pitch adjusting unit are respectively input with a sound source to be adjusted, the output ends of the high pitch adjusting unit and the low pitch adjusting unit are connected with the same input end of the operational amplifying unit, the output end of the operational amplifying unit is connected with the input end of the gain adjusting unit, and the gain adjusting unit outputs the adjusted sound source.
In a further improvement of the present invention, the operational amplifier unit includes an operational amplifier U102A, the output terminals of the treble adjusting unit and the bass adjusting unit are connected to the inverting input terminal of the operational amplifier U102A, the non-inverting input terminal of the operational amplifier U102A is grounded, and the tone control circuit further includes a stabilizing unit connected in parallel between the inverting input terminal and the output terminal of the operational amplifier U102A.
The utility model further improves, and the utility model also comprises a filtering unit which is arranged at the power supply end of the operational amplifier U102A.
The utility model is further improved, the filtering unit comprises a grounded capacitor C285 and a grounded capacitor C286, and the other ends of the grounded capacitor C285 and the grounded capacitor C286 are respectively connected with a positive power supply pin 4 and a negative power supply pin 8 of the operational amplifier U102A.
The utility model is further improved, the treble adjusting unit comprises a resistor R131, a potentiometer V104, a capacitor C127 and a resistor R132, the resistor R131, the potentiometer V104 and the resistor R132 are connected in series, one end of the resistor R131, the potentiometer V104 and the resistor R132 are connected in series, the other end of the resistor R is connected with the input end of the sound source, the other end of the resistor R is connected with the output end of the operational amplification unit, and the adjusting end of the potentiometer V104 is connected with the input end of the operational amplification unit after being connected in series with the capacitor C127.
The utility model is further improved, the bass adjusting unit comprises resistors R128 and R129, a potentiometer V103, a capacitor C126 and a resistor R130, the resistor R128, the potentiometer V103 and the resistor R129 are connected in series, one end of the resistor R is connected to the input end of the sound source, the other end of the resistor R is connected to the output end of the operational amplifying unit, the adjusting end of the potentiometer V103 is connected in series with the resistor R130 and then connected to the input end of the operational amplifying unit, and the capacitor C126 is connected in parallel to the two ends of the potentiometer V103.
In a further improvement of the present invention, the gain adjustment unit includes an operational amplifier U102B, resistors R287 and R211, and capacitors C287 and C215, wherein an inverting input terminal of the operational amplifier U102B is connected to an output terminal of the operational amplification unit through the resistor R287 and the capacitor C287 connected in series, the resistor R211 and the capacitor C215 are connected in parallel, one end of the resistor R211 is connected to the inverting input terminal of the operational amplifier U102B, and the other end of the resistor R211 is connected to the output terminal of the operational amplifier U102B.
Compared with the prior art, the utility model has the beneficial effects that: the high pitch adjusting unit and the low pitch adjusting unit can respectively adjust high pitch and low pitch components output to the loudspeaker, provide good-listening sound for different people and different music, and meet the requirement of people on listening feeling.
Drawings
FIG. 1 is a block diagram of the present invention;
FIG. 2 is a schematic circuit diagram according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
As shown in fig. 1 and fig. 2, the tone control circuit of the present invention includes potentiometers VR103 and VR104, an operational amplifier U102A, an operational amplifier U102B, and a resistor-capacitor at the periphery. The potentiometers VR103 and VR104 are used for separately adjusting the treble part and the bass tone, the operational amplification unit mainly composed of the operational amplifier U102A realizes the amplified output of the tone, and the gain adjustment unit mainly composed of the operational amplifier U102B is used for adjusting the gain of the sound source output by the operational amplification unit, and outputting the sound source to the subsequent frequency division circuit after adjustment.
The TREBLE and BASS BASS of the embodiment are respectively adjusted by plus and minus 12dB, the VR103 is adjusted, the BASS part output of the woofer can be adjusted, the VR104 is adjusted, the TREBLE part output of the tweeter can be adjusted, and the requirements of different people on sound listening feeling are met.
The sound source signal is adjusted in high and low sound by a bass adjusting circuit composed of a resistor R228, a capacitor C126, a potentiometer VR103, resistors R130 and R129, and a treble adjusting circuit composed of a resistor R131, a potentiometer VR104, a resistor R132 and a capacitor C127.
The capacitor C289 is a stable unit of the operational amplifier U102A and avoids high-frequency self-excitation, a positive power supply is provided for the operational amplifier U102 by +15VA through the resistor R286, a negative power supply is provided for the operational amplifier U102 by 15VA through the resistor R285, and filter capacitors of +15VA and-15 VA are provided by the capacitors C286 and C285.
When the potentiometer VR103 is adjusted to the middle value, bass cannot be boosted or attenuated, when the potentiometer VR103 is adjusted to the maximum value, bass can be boosted by 12dB at most, when the potentiometer VR103 is adjusted to the minimum value, bass can be attenuated by 12dB at most, and other positions are adjusted, and corresponding boosting and attenuation are correspondingly achieved between 0 dB and 12 dB. When the potentiometer VR104 is adjusted to the middle value, the high pitch cannot be improved and cannot be attenuated, when the potentiometer VR104 is adjusted to the maximum value, the high pitch can be improved by 12dB at most, when the potentiometer VR104 is adjusted to the minimum value, the high pitch can be attenuated by 12dB at most, and other positions are adjusted, and corresponding improvement and attenuation are correspondingly achieved between 0 dB and 12 dB. The high pitch and low pitch components output to the loudspeaker can be adjusted by adjusting the potentiometers VR103 and VR104, so that good-listening sounds are provided for different people and different music, and the requirement of people on listening feeling is met. The adjusted signal is subjected to gain adjustment through the U102B operational amplifier circuit and enters a post-stage circuit.
The above-described embodiments are intended to be illustrative, and not restrictive, of the utility model, and all changes that come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Claims (7)
1. A tone control circuit, characterized by: including high pitch regulating unit, bass regulating unit, operational amplification unit and gain adjustment unit, the input of high pitch regulating unit and bass regulating unit is inputed respectively and is treated the sound source of adjusting, the output of high pitch regulating unit and bass regulating unit links to each other with the same input of operational amplification unit, the output of operational amplification unit links to each other with gain adjustment unit's input, gain adjustment unit output adjusts the good sound source.
2. The tone control circuit of claim 1, wherein: the operational amplification unit comprises an operational amplifier U102A, the output ends of the high tone adjusting unit and the low tone adjusting unit are connected with the inverting input end of the operational amplifier U102A, the non-inverting input end of the operational amplifier U102A is grounded, and the tone control circuit further comprises a stabilizing unit which is connected between the inverting input end and the output end of the operational amplifier U102A in parallel.
3. The tone control circuit of claim 2, wherein: the power supply circuit also comprises a filtering unit which is arranged at the power supply end of the operational amplifier U102A.
4. The tone control circuit of claim 3, wherein: the filter unit comprises a grounded capacitor C285 and a grounded capacitor C286, and the other ends of the grounded capacitor C285 and the grounded capacitor C286 are respectively connected with a positive power pin 4 and a negative power pin 8 of the operational amplifier U102A.
5. The tone control circuit of any one of claims 1-4, wherein: the treble adjusting unit comprises a resistor R131, a potentiometer V104, a capacitor C127 and a resistor R132, wherein the resistor R131, the potentiometer V104 and the resistor R132 are connected in series, one end of the resistor R104 is connected with an audio source input end, the other end of the resistor R is connected with an output end of the operational amplification unit, and an adjusting end of the potentiometer V104 is connected with an input end of the operational amplification unit after being connected in series with the capacitor C127.
6. The tone control circuit of any one of claims 1-4, wherein: the bass adjusting unit comprises resistors R128 and R129, a potentiometer V103, a capacitor C126 and a resistor R130, the resistor R128, the potentiometer V103 and the resistor R129 are connected in series, one end of the resistor R128 is connected with the sound source input end, the other end of the resistor R103 is connected with the output end of the operational amplification unit, the adjusting end of the potentiometer V103 is connected with the input end of the operational amplification unit after being connected with the resistor R130 in series, and the capacitor C126 is connected to the two ends of the potentiometer V103 in parallel.
7. The tone control circuit of any one of claims 1-4, wherein: the gain adjusting unit comprises an operational amplifier U102B, resistors R287 and R211, capacitors C287 and C215, wherein the inverting input end of the operational amplifier U102B is connected with the output end of the operational amplifying unit through the resistor R287 and the capacitor C287 which are connected in series, the resistor R211 is connected with the capacitor C215 in parallel, one end of the resistor R211 is connected with the inverting input end of the operational amplifier U102B, and the other end of the resistor R211 is connected with the output end of the operational amplifier U102B.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120988218.8U CN215420720U (en) | 2021-05-10 | 2021-05-10 | Tone control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120988218.8U CN215420720U (en) | 2021-05-10 | 2021-05-10 | Tone control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215420720U true CN215420720U (en) | 2022-01-04 |
Family
ID=79674716
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120988218.8U Active CN215420720U (en) | 2021-05-10 | 2021-05-10 | Tone control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215420720U (en) |
-
2021
- 2021-05-10 CN CN202120988218.8U patent/CN215420720U/en active Active
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| CP03 | Change of name, title or address |
Address after: 518000 1st floor, electronic building, Jiuwei Xiange technology and Culture Industrial Park, Jiuwei community, Hangcheng street, Bao'an District, Shenzhen, Guangdong Province Patentee after: IAG Group Ltd. Address before: 518000 Jiuwei Xiange science and Technology Industrial Park, Xi Township, Bao'an District, Shenzhen City, Guangdong Province Patentee before: IAG GROUP Co.,Ltd. |