CN206727962U - A kind of audio power amplifying circuit - Google Patents
A kind of audio power amplifying circuit Download PDFInfo
- Publication number
- CN206727962U CN206727962U CN201720459758.0U CN201720459758U CN206727962U CN 206727962 U CN206727962 U CN 206727962U CN 201720459758 U CN201720459758 U CN 201720459758U CN 206727962 U CN206727962 U CN 206727962U
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- CN
- China
- Prior art keywords
- electric capacity
- resistance
- operational amplifier
- slide rheostat
- control circuit
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Abstract
The utility model discloses a kind of audio power amplifying circuit, operational amplifier U1 in-phase input end passes sequentially through resistance R6, electric capacity C5, resistance R5 and the connection of high pitch control circuit, high pitch control circuit is also connected by isolation resistance R4 with bass control circuit, low, high pitch control circuit is also connected by the first slide rheostat RP1 with switching S1 one end, the switch S1 other end is also connected by resistance R1 with audio signal output terminal, positive pole of the operational amplifier U1 output end also with loudspeaker M is connected, and loudspeaker M negative pole is connected to the ground.Audio power amplifying circuit of the present utility model, circuit is simple, easily realize, low manufacture cost, and be provided with bass control circuit, high pitch control circuit is adjusted to the bass part in audio signal, treble portion respectively.
Description
Technical field
It the utility model is related to acoustic wave device technical field, and in particular to a kind of audio power amplifying circuit.
Background technology
At present, audio amplifier circuit on the market, in order to ensure amplification effect, required electronic component is numerous, and circuit is set
It is high to count cost, circuit is complicated, moreover, many audio amplifier circuits, it is impossible to realize the difference to high and low line in audio signal point
Regulation, it is impossible to the quality of audio signal amplification is improved, moreover, the power supply supply stability of operational amplifier is poor, it may appear that ripple
Phenomenon, cause operational amplifier to export unstable phenomenon, further influence the amplification effect of audio signal.
Utility model content
The purpose of this utility model is to overcome existing audio amplifier circuit, and circuit is complicated, and design cost is high, and can not be real
It is now poor to the regulation respectively of high and low line in audio signal point, the power supply supply stability of operational amplifier, it may appear that ripple is existing
As the problem of.Audio power amplifying circuit of the present utility model, circuit is simple, easily realizes, low manufacture cost, and be provided with low
Sound control circuit, high pitch control circuit are adjusted to the bass part in audio signal, treble portion respectively, improve audio letter
Number amplification quality, and two groups of filter capacitors are added to the power supply terminal of operational amplifier, ensure the stability of power supply, it is ensured that
The stability of operational amplifier output, has a good application prospect.
In order to achieve the above object, technical scheme is used by the utility model：
A kind of audio power amplifying circuit, it is characterised in that：Operational amplifier U1 including model TDA2030A and raise
Sound device M,
The in-phase input end of the operational amplifier U1 passes sequentially through resistance R6, electric capacity C5, resistance R5 and high pitch control electricity
The connection on road, the high pitch control circuit are also connected by isolation resistance R4 with bass control circuit, the bass control electricity
Road, high pitch control circuit are also connected by the first slide rheostat RP1 with switching S1 one end, the other end of the switch S1
Also it is connected by resistance R1 with audio signal output terminal；
The inverting input of the operational amplifier U1 passes sequentially through electric capacity C6, resistance R9 is connected to the ground, the computing
Amplifier U1 output end is connected by feedback resistance R8 with operational amplifier U1 inverting input, the operational amplifier
U1 output end also passes sequentially through electric capacity C6, resistance R9 is connected to the ground, and the output end of the operational amplifier U1 is also with raising one's voice
Device M positive pole is connected, and the negative pole of the loudspeaker M is connected to the ground；
The positive voltage input of the operational amplifier U1 is external+VCC terminal, the negative voltage of the operational amplifier U1 is defeated
Enter to hold external-VCC terminal, described+VCC terminal ,-VCC terminal are parallel with two filter capacitors；
The bass control circuit includes the second slide rheostat RP2, resistance R2, resistance R3, electric capacity C1, resistance C2, institute
State resistance R2, the second slide rheostat RP2, resistance R3 to be in series, the electric capacity C1 is connected in parallel on the second slide rheostat RP2 tune
Save between end, resistance R2 and the second slide rheostat RP2 junctions, the electric capacity C2 is connected in parallel on the second slide rheostat RP2's
Between adjustable side, resistance R3 and the second slide rheostat RP2 junctions, the resistance R2 is also with the first slide rheostat RP1's
Adjustable side is connected, and the resistance R3 is also connected to the ground, adjustable side and the isolation resistance R4 of the second slide rheostat RP2
One end be connected；
The high pitch control circuit includes the 3rd slide rheostat RP3, electric capacity C3, electric capacity C4, and the electric capacity C3, the 3rd are slided
Dynamic rheostat RP3, electric capacity C4 are in series, the adjustable side of the 3rd slide rheostat RP3 and the R4 of the isolation resistance other end
It is connected.
A kind of foregoing audio power amplifying circuit, it is characterised in that：The in-phase input end of the operational amplifier U1 is also
Pull down resistor R7 is connected with, the pull down resistor R7 is connected to the ground.
A kind of foregoing audio power amplifying circuit, it is characterised in that：Described+VCC terminal passes through electric capacity C8, electric capacity respectively
C9 is connected to the ground, and the electric capacity C8, electric capacity C9 are in parallel, and described-VCC terminal passes through electric capacity C10, electric capacity C11 and ground respectively
It is connected, the electric capacity C10, electric capacity C11 are in parallel.
A kind of foregoing audio power amplifying circuit, it is characterised in that：The electric capacity C8, electric capacity C10 are polar capacitor.
A kind of foregoing audio power amplifying circuit, it is characterised in that：The positive pole of the loudspeaker M is also by passing sequentially through
Electric capacity C7, resistance R10 are connected to the ground.
A kind of foregoing audio power amplifying circuit, it is characterised in that：Gold is provided with the audio signal output terminal
Belong to screen layer.
A kind of foregoing audio power amplifying circuit, it is characterised in that：The voltage of described+VCC terminal is+24V, described-
The voltage of VCC terminal is -24V.
A kind of foregoing audio power amplifying circuit, it is characterised in that：Fin is installed on the operational amplifier U1.
The beneficial effects of the utility model are：Audio power amplifying circuit of the present utility model, circuit is simple, easily real
It is existing, low manufacture cost, and bass control circuit, high pitch control circuit are provided with respectively to the bass part in audio signal, height
Line point is adjusted, and improves the amplification quality of audio signal, and add two groups of filtering to the power supply terminal of operational amplifier
Electric capacity, ensure the stability of power supply, it is ensured that the stability of operational amplifier output, have a good application prospect.
Brief description of the drawings
Fig. 1 is the circuit diagram of audio power amplifying circuit of the present utility model.
Embodiment
Below in conjunction with Figure of description, the utility model is further described.
As shown in figure 1, audio power amplifying circuit of the present utility model, include model TDA2030A operational amplifier
U1 and loudspeaker M,
TDA2030A operational amplifier, magnification distortion degree is low, moderate cost, is easy to the amplification of audio signal, and computing
Fin is installed on amplifier U1, is easy to carry out quick heat radiating in the course of the work, improves service life,
The in-phase input end of the operational amplifier U1 passes sequentially through resistance R6, electric capacity C5, resistance R5 and high pitch control electricity
The connection on road, the high pitch control circuit are also connected by isolation resistance R4 with bass control circuit, the bass control electricity
Road, high pitch control circuit are also connected by the first slide rheostat RP1 with switching S1 one end, the other end of the switch S1
Also it is connected by resistance R1 with audio signal output terminal, it is described to be provided with bass control circuit, high pitch control circuit difference
Bass part in audio signal, treble portion are adjusted, improve the amplification quality of audio signal, the first slide rheostat
RP1 is here used for adjusting operational amplifier U1 multiplication factor, and C5 is capacitance, prevents that the operational amplifier U1 of rear class is straight
Flow influence of the current potential to prime tone circuit；
The inverting input of the operational amplifier U1 passes sequentially through electric capacity C6, resistance R9 is connected to the ground, the computing
Amplifier U1 output end is connected by feedback resistance R8 with operational amplifier U1 inverting input, the operational amplifier
U1 output end also passes sequentially through electric capacity C6, resistance R9 is connected to the ground, and the output end of the operational amplifier U1 is also with raising one's voice
Device M positive pole is connected, and the negative pole of the loudspeaker M is connected to the ground；
The positive voltage input of the operational amplifier U1 is external+VCC terminal, the negative voltage of the operational amplifier U1
Input is external-VCC terminal, described+VCC terminal ,-VCC terminal be parallel with two filter capacitors, and+VCC terminal passes through respectively
Electric capacity C8, electric capacity C9 are connected to the ground, and the electric capacity C8, electric capacity C9 are in parallel, described-VCC terminal respectively by electric capacity C10,
Electric capacity C11 is connected to the ground, and the electric capacity C10, electric capacity C11 are in parallel, and the electric capacity C8, electric capacity C10 are polar capacitor, electric capacity
Be worth it is larger, for filtering the noise jamming in input power (such as peak voltage, electrostatic potential etc.), electric capacity C9, electric capacity C11
Capacitance is larger to be used to filter the ripple electric capacity in input power, ensures the stability of power supply, it is ensured that operational amplifier output
Stability, the voltage of of the present utility model+VCC terminal is+24V, and the voltage of described-VCC terminal is -24V, for being put to computing
Big device U1 provides operating voltage.
The bass control circuit includes the second slide rheostat RP2, resistance R2, resistance R3, electric capacity C1, resistance C2, institute
State resistance R2, the second slide rheostat RP2, resistance R3 to be in series, the electric capacity C1 is connected in parallel on the second slide rheostat RP2 tune
Save between end, resistance R2 and the second slide rheostat RP2 junctions, the electric capacity C2 is connected in parallel on the second slide rheostat RP2's
Between adjustable side, resistance R3 and the second slide rheostat RP2 junctions, the resistance R2 is also with the first slide rheostat RP1's
Adjustable side is connected, and the resistance R3 is also connected to the ground, adjustable side and the isolation resistance R4 of the second slide rheostat RP2
One end be connected；
The high pitch control circuit includes the 3rd slide rheostat RP3, electric capacity C3, electric capacity C4, and the electric capacity C3, the 3rd are slided
Dynamic rheostat RP3, electric capacity C4 are in series, the adjustable side of the 3rd slide rheostat RP3 and the R4 of the isolation resistance other end
It is connected.
The in-phase input end of the operational amplifier U1 is also associated with pull down resistor R7, and the pull down resistor R7 is connected to the ground
Connect.
The positive pole of the loudspeaker M is also by passing sequentially through electric capacity C7, resistance R10 is connected to the ground.
Metal screen layer is provided with the audio signal output terminal, when ensureing binaural audio signal input amplification
Reliability.
In summary, audio power amplifying circuit of the present utility model, circuit is simple, easily realizes, low manufacture cost, and
Be provided with bass control circuit, high pitch control circuit is adjusted to the bass part in audio signal, treble portion respectively, carry
The amplification quality of high audio signal, and two groups of filter capacitors are added to the power supply terminal of operational amplifier, ensure the steady of power supply
It is qualitative, it is ensured that the stability of operational amplifier output, to have a good application prospect.
General principle of the present utility model, main features and advantages have been shown and described above.The technical staff of the industry
It should be appreciated that the utility model is not restricted to the described embodiments, the simply explanation described in above-described embodiment and specification is originally
The principle of utility model, on the premise of the spirit and scope of the utility model is not departed from, the utility model also has various change
And improvement, these changes and improvements are both fallen within claimed the scope of the utility model.The utility model requires protection scope
By appended claims and its equivalent thereof.
Claims (8)
- A kind of 1. audio power amplifying circuit, it is characterised in that：Operational amplifier U1 including model TDA2030A and raise one's voice Device M,The in-phase input end of the operational amplifier U1 passes sequentially through resistance R6, electric capacity C5, resistance R5 and high pitch control circuit Connection, the high pitch control circuit are also connected by isolation resistance R4 with bass control circuit, the bass control circuit, height Sound control circuit is also connected by the first slide rheostat RP1 with switching S1 one end, and the other end of the switch S1 is also logical Resistance R1 is crossed with audio signal output terminal to be connected；The inverting input of the operational amplifier U1 passes sequentially through electric capacity C6, resistance R9 is connected to the ground, the operation amplifier Device U1 output end is connected by feedback resistance R8 with operational amplifier U1 inverting input, the operational amplifier U1's Output end also passes sequentially through electric capacity C6, resistance R9 is connected to the ground, and the output end of the operational amplifier U1 is also with loudspeaker M's Positive pole is connected, and the negative pole of the loudspeaker M is connected to the ground；The positive voltage input of the operational amplifier U1 is external+VCC terminal, the negative voltage input of the operational amplifier U1 External-VCC terminal, described+VCC terminal ,-VCC terminal are parallel with two filter capacitors；The bass control circuit includes the second slide rheostat RP2, resistance R2, resistance R3, electric capacity C1, resistance C2, the electricity Resistance R2, the second slide rheostat RP2, resistance R3 are in series, and the electric capacity C1 is connected in parallel on the second slide rheostat RP2 regulation Between end, resistance R2 and the second slide rheostat RP2 junctions, the electric capacity C2 is connected in parallel on the second slide rheostat RP2 tune Save between end, resistance R3 and the second slide rheostat RP2 junctions, tune of the resistance R2 also with the first slide rheostat RP1 Section end is connected, and the resistance R3 is also connected to the ground, adjustable side and the isolation resistance R4 of the second slide rheostat RP2 One end be connected；The high pitch control circuit includes the 3rd slide rheostat RP3, electric capacity C3, electric capacity C4, and the electric capacity C3, the 3rd, which slide, to be become Resistance device RP3, electric capacity C4 are in series, and the adjustable side of the 3rd slide rheostat RP3 is connected with the R4 of the isolation resistance other end Connect.
- A kind of 2. audio power amplifying circuit according to claim 1, it is characterised in that：The operational amplifier U1's is same Phase input is also associated with pull down resistor R7, and the pull down resistor R7 is connected to the ground.
- A kind of 3. audio power amplifying circuit according to claim 1, it is characterised in that：Described+VCC terminal passes through respectively Electric capacity C8, electric capacity C9 are connected to the ground, and the electric capacity C8, electric capacity C9 are in parallel, described-VCC terminal respectively by electric capacity C10, Electric capacity C11 is connected to the ground, and the electric capacity C10, electric capacity C11 are in parallel.
- A kind of 4. audio power amplifying circuit according to claim 3, it is characterised in that：The electric capacity C8, electric capacity C10 are Polar capacitor.
- A kind of 5. audio power amplifying circuit according to claim 1, it is characterised in that：The positive pole of the loudspeaker M is also By passing sequentially through electric capacity C7, resistance R10 is connected to the ground.
- A kind of 6. audio power amplifying circuit according to claim 1, it is characterised in that：The audio signal output terminal Inside it is provided with metal screen layer.
- A kind of 7. audio power amplifying circuit according to claim 3, it is characterised in that：The voltage of described+VCC terminal is + 24V, the voltage of described-VCC terminal is -24V.
- A kind of 8. audio power amplifying circuit according to claim 1, it is characterised in that：Pacify on the operational amplifier U1 Equipped with fin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720459758.0U CN206727962U (en) | 2017-04-20 | 2017-04-20 | A kind of audio power amplifying circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720459758.0U CN206727962U (en) | 2017-04-20 | 2017-04-20 | A kind of audio power amplifying circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206727962U true CN206727962U (en) | 2017-12-08 |
Family
ID=60507711
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720459758.0U Expired - Fee Related CN206727962U (en) | 2017-04-20 | 2017-04-20 | A kind of audio power amplifying circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206727962U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108832901A (en) * | 2018-08-08 | 2018-11-16 | 义乌工商职业技术学院 | A kind of computer data control system |
-
2017
- 2017-04-20 CN CN201720459758.0U patent/CN206727962U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108832901A (en) * | 2018-08-08 | 2018-11-16 | 义乌工商职业技术学院 | A kind of computer data control system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171208 Termination date: 20210420 |
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| CF01 | Termination of patent right due to non-payment of annual fee |