CN212936174U - Simple high-quality sound power amplifier - Google Patents
Simple high-quality sound power amplifier Download PDFInfo
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- CN212936174U CN212936174U CN202021675152.9U CN202021675152U CN212936174U CN 212936174 U CN212936174 U CN 212936174U CN 202021675152 U CN202021675152 U CN 202021675152U CN 212936174 U CN212936174 U CN 212936174U
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- power supply
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- 230000007547 defect Effects 0.000 abstract description 6
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- 230000007613 environmental effect Effects 0.000 abstract description 4
- 239000000463 material Substances 0.000 abstract description 4
- 230000003321 amplification Effects 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 206010037660 Pyrexia Diseases 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
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Abstract
The utility model provides a simple and easy type high quality stereo set power amplifier, it includes: the integrated circuit is composed of 2 LM12 integrated circuit modules as core devices, and peripheral components including 8 resistors and positive and negative power supplies connected by circuits. The utility model overcomes prior art's defect, the electronic circuit is very simple, peripheral discrete components and parts quantity is few, the module is put by LM12 fortune to the protection electrical apparatus circuit from the area, need not to add in addition and establish, the peripheral components and parts of use are all very conventional and single, the uniformity is easily guaranteed, it is little influenced by ambient temperature, components and parts are natural and early inefficacy and spoilage are very low, the reliability and the stability of circuit have been improved, it is very convenient to maintain, the volume is littleer, it is compacter, product cost is low very much, material consumption is few, environmental protection more, production and equipment are very simple.
Description
Technical Field
The utility model belongs to the technical field of the electron and specifically relates to an electron stereo set class power amplifier circuit technique is related to.
Background
In the field of electronic sound power amplification circuits, sound power amplifiers with high-quality full-balanced circuits in the prior art work have a plurality of defects, electronic circuits of the sound power amplifiers are very complex, the number of components is as large as nearly or hundreds, performance consistency is difficult to guarantee due to the fact that the used components are too many, a plurality of independent protection circuits are required to be additionally arranged in the circuits, the reliability is poor due to the fact that the number of components and the number of the circuits are too many, the stability of the components and the number of the components are not small and are affected by the environmental temperature is poor, the components naturally and early fail and the damage rate is high, and the maintenance is very inconvenient due to the fact; the product cost is high, the material consumption is large, the production and the assembly are complex, the production cost is also high, and the overall dimension of the circuit and the device part is large. Therefore, the utility model discloses to the defect that prior art exists, the stereo set power amplifier of the whole balanced circuit work of high quality that a new components and parts are few is researched and developed with great concentration, has overcome the defect that prior art exists well.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a stereo set power amplifier of the whole balanced circuit work of high quality that components and parts are few to solve the above-mentioned a great deal of defect that exists among the prior art.
In order to solve the technical problem, the utility model provides a simple and easy type high-quality stereo set power amplifier, include: 2 LM12 operational amplifier module, 8 resistors, 2 DC power supplies; the signal input end is simultaneously connected with the input end of the first resistor and the input end of the fifth resistor, and the output end of the first resistor is simultaneously connected with the input end of the second resistor and the input negative end of the first LM12 operational amplifier module; the output end of the second resistor is simultaneously connected with the output end of the first LM12 operational amplifier module and the input end of the loudspeaker; the signal input end is simultaneously connected with the input end of the third resistor and the input end of the seventh resistor; the output end of the seventh resistor is simultaneously connected with the input end of the eighth resistor and the input positive end of the second LM12 operational amplifier module; the output end of the third resistor is simultaneously connected with the input positive end of the first LM12 operational amplifier module and the input end of the fourth resistor; the output end of the fifth resistor is simultaneously connected with the input negative end of the second LM12 operational amplifier module and the input end of the sixth resistor; the output end of the fourth resistor is simultaneously connected with the output end of the sixth resistor, the negative electrode of the first direct-current power supply and the positive electrode of the second direct-current power supply; the positive electrode of the first direct current power supply is simultaneously connected with the power supply positive electrode end of the first LM12 operational amplifier module and the power supply positive electrode end of the second LM12 operational amplifier module; the negative electrode of the second direct current power supply is simultaneously connected with the negative electrode end of the power supply of the first LM12 operational amplifier module and the negative electrode end of the power supply of the second LM12 operational amplifier module; the output end of the eighth resistor is connected to the output end of the second LM12 operational amplifier module, the output end of the speaker and the ground.
After the signal input end is connected with a signal to be amplified, the amplified electric power is output by the loudspeaker.
The utility model overcomes prior art's defect, the electronic circuit is very simple, peripheral discrete components and parts quantity is few, the module is put by LM12 fortune to the protection electrical apparatus circuit from the area, need not to add in addition and establish, the peripheral components and parts of use are all very conventional and single, the uniformity is easily guaranteed, it is little influenced by ambient temperature, components and parts are natural and early inefficacy and spoilage are very low, the reliability and the stability of circuit have been improved, it is very convenient to maintain, the volume is littleer, it is compacter, product cost is low very much, material consumption is few, environmental protection more, production and equipment are very simple.
Drawings
In order to more clearly illustrate the present invention, the following detailed description will be provided for the technical solution by means of the specific embodiments and with reference to the accompanying drawings; it is worth mentioning that, obviously, the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, some components can be changed accordingly without creative work.
Fig. 1 is a circuit diagram of a power amplifier of a sound system with few components and high quality full balanced circuit.
Reference numerals:
1. a first resistor; 2. a second resistor; 3. a third resistor; 4. a fourth resistor;
5. a fifth resistor; 6. a sixth resistor; 7. a seventh resistor; 8. an eighth resistor;
9. a signal input terminal; 10. a signal input terminal; 11. the first LM12 is an operational amplifier module
A block; 12. the second LM12 is an operational amplifier module; 13. a first direct current power supply; 14.
a second direct current power supply; 15. a horn; 16. and (4) grounding.
Detailed Description
The technical solutions of the present invention will be further clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention. For example, in the description of the present invention, it is obvious to those skilled in the art that in the circuit, components such as resistors, capacitors, and rectifier diodes may be added as appropriate, and the magnitude of the resistance value and the values of other components including the power source may be selected within a certain range.
The present invention will be explained in further detail with reference to specific embodiments.
As shown in fig. 1, the present embodiment provides an acoustic power amplifier with few components and high quality full balanced circuit operation, which includes: the integrated circuit is formed by taking 2 American military LM12 integrated circuit modules as core devices and connecting peripheral devices comprising 8 resistors and positive and negative power supplies according to a circuit shown in figure 1.
The signal input end 9 is simultaneously connected with the input end of the first resistor 1 and the input end of the fifth resistor 5, and the output end of the first resistor 1 is simultaneously connected with the input end of the second resistor 2 and the input negative end of the U.S. military grade first LM12 operational amplifier module 11; the output end of the second resistor 2 is simultaneously connected with the output end of the American military grade first LM12 operational amplifier module 11 and the input end of the loudspeaker 15; the signal input terminal 10 is connected to both the input terminal of the third resistor 3 and the input terminal of the seventh resistor 7; the output end of the seventh resistor 7 is simultaneously connected with the input end of the eighth resistor 8 and the input positive end of the American military grade second LM12 operational amplifier module 12; the output end of the third resistor 3 is simultaneously connected with the input positive end of the American military grade first LM12 operational amplifier module 11 and the input end of the fourth resistor 4; the output end of the fifth resistor 5 is simultaneously connected with the input negative end of the US military grade second LM12 operational amplifier module 12 and the input end of the sixth resistor 6; the output end of the fourth resistor 4 is simultaneously connected with the output end of the sixth resistor 6, the negative electrode of the first direct current power supply 13 and the positive electrode of the second direct current power supply 14; the positive electrode of the first direct current power supply 13 is simultaneously connected with the power supply positive electrode end of the American military grade first LM12 operational amplifier module 11 and the power supply positive electrode end of the American military grade second LM12 operational amplifier module 12; the negative electrode of the second direct current power supply 14 is simultaneously connected with the power supply negative electrode end of the American military grade first LM12 operational amplifier module 11 and the power supply negative electrode end of the American military grade second LM12 operational amplifier module 12; the output terminal of the eighth resistor 8 is connected to the output terminal of the U.S. military grade second LM12 operational amplifier module 12, the output terminal of the speaker 15 and the ground 16.
After the signal input end is connected with a signal to be amplified, the amplified electric power is output by the loudspeaker 15.
In the above, the 2 us military grade LM12 is selectable within its series, such as LM12CLK in the available series, with an operating voltage of ± 30V- ± 35V; in the embodiment, 2 LM12 is selected, and the working voltage is +/-35V-40V.
The impedance of the horn 15 is better when the impedance is slightly less than or close to 4 omega (the distortion degree is small), and a positive-negative 35-40V power supply 13 and a power supply 14 are adopted for power supply; 8 resistors of peripheral components are only one quarter watt in power; the resistance values of 8 resistors in the figure can be selected as: the resistor R1 is 800 Ω, the resistor R2 is 12K Ω, the resistor R3 is 750 Ω, the resistor R4 is 8K Ω, the resistor R5 is 750 Ω, the resistor R6 is 8K Ω, the resistor R7 is 800 Ω, and the resistor R8 is 12K Ω.
It is obvious to those skilled in the art that in the above circuit, components such as resistors, capacitors, and rectifying diodes may be added as appropriate according to actual conditions, and the magnitude of the resistance value and the values of other components including the power supply voltage may be selected within a certain range. For example, 2 rectifier diodes of 1A or so are added.
In the above, the 2 us operational amplifier modules of the LM12 class are power amplifiers with ± 35V ± 10A driving capability during operation, the monolithic integrated circuit module can provide a load with impedance of about 4 Ω with a distortion degree of 0.01% or less and 150W sine wave power, and a bandwidth of 60KHz, and the integrated circuit module has various automatic protection circuits, such as input overvoltage protection, start control, output current overcurrent limiting, overheat protection, dynamic safety zone protection, and the like. The output of +/-10A can be provided at any output voltage, and meanwhile, complete overload protection is provided, the power supply short circuit and the dynamic safety area are protected, and the output end is kept open when the temperature exceeds 150 ℃ or the power supply voltage of the integrated operational amplifier module approaches to BVceo. The power amplifier can be formed by simply connecting the components with few peripheries, the power amplification function under the work of a full-balanced circuit with few components can be realized, and protective components such as a relay for protecting a loudspeaker are not required to be additionally arranged in the sound circuit for protection; greatly reduced the audio power loss and promoted the tone quality for the stereo set product can satisfy the high-quality demand of stereo set fever friend level to the stereo set.
Its peripheral discrete components and parts quantity of this application is few, the electronic circuit is very simple, protection electric circuit is put the module by LM12 fortune and is taken certainly, need not to establish a plurality of solitary protection electric circuit in addition in the circuit, the peripheral components and parts of use are all very conventional and single, the uniformity is guaranteed very easily, it is little influenced by ambient temperature, components and parts nature and early inefficacy and spoilage are very low, these have improved the reliability and the stability of circuit greatly, it is very convenient to maintain, product cost is low very much, material consumption is few, more environmental protection, production and equipment are simple very much, manufacturing cost descends obviously, the product volume is littleer, compacter.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (1)
1. A simple high-quality sound power amplifier is characterized by comprising: 2 LM12 operational amplifier module, 8 resistors, 2 DC power supplies; the signal input end is simultaneously connected with the input end of the first resistor and the input end of the fifth resistor, and the output end of the first resistor is simultaneously connected with the input end of the second resistor and the input negative end of the first LM12 operational amplifier module; the output end of the second resistor is simultaneously connected with the output end of the first LM12 operational amplifier module and the input end of the loudspeaker; the signal input end is simultaneously connected with the input end of the third resistor and the input end of the seventh resistor; the output end of the seventh resistor is simultaneously connected with the input end of the eighth resistor and the input positive end of the second LM12 operational amplifier module; the output end of the third resistor is simultaneously connected with the input positive end of the first LM12 operational amplifier module and the input end of the fourth resistor; the output end of the fifth resistor is simultaneously connected with the input negative end of the second LM12 operational amplifier module and the input end of the sixth resistor; the output end of the fourth resistor is simultaneously connected with the output end of the sixth resistor, the negative electrode of the first direct-current power supply and the positive electrode of the second direct-current power supply; the positive electrode of the first direct current power supply is simultaneously connected with the power supply positive electrode end of the first LM12 operational amplifier module and the power supply positive electrode end of the second LM12 operational amplifier module; the negative electrode of the second direct current power supply is simultaneously connected with the negative electrode end of the power supply of the first LM12 operational amplifier module and the negative electrode end of the power supply of the second LM12 operational amplifier module; the output end of the eighth resistor is connected to the output end of the second LM12 operational amplifier module, the output end of the speaker and the ground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021675152.9U CN212936174U (en) | 2020-08-12 | 2020-08-12 | Simple high-quality sound power amplifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021675152.9U CN212936174U (en) | 2020-08-12 | 2020-08-12 | Simple high-quality sound power amplifier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212936174U true CN212936174U (en) | 2021-04-09 |
Family
ID=75298365
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021675152.9U Expired - Fee Related CN212936174U (en) | 2020-08-12 | 2020-08-12 | Simple high-quality sound power amplifier |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212936174U (en) |
-
2020
- 2020-08-12 CN CN202021675152.9U patent/CN212936174U/en not_active Expired - Fee Related
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| 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: 20210409 |