CN201585114U - Sound box - Google Patents
Sound box Download PDFInfo
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- CN201585114U CN201585114U CN2009202952009U CN200920295200U CN201585114U CN 201585114 U CN201585114 U CN 201585114U CN 2009202952009 U CN2009202952009 U CN 2009202952009U CN 200920295200 U CN200920295200 U CN 200920295200U CN 201585114 U CN201585114 U CN 201585114U
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- 230000001681 protective effect Effects 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 2
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Abstract
The utility model discloses a sound box which comprises a mixer (2), a frequency divider (4), a switch power supply (5), a power amplifier (6) and a loudspeaker (8), wherein the frequency divider (4) and the switch power supply (5) are both connected with the power amplifier (6); the switch power supply (5) comprises a PWM switch power supply (5.3), a rectification filtering circuit (5.1) and a PFC circuit (5.2); an input end of the PFC circuit (5.2) is connected with the rectification filtering circuit (5.1) of the switch power supply (5), an output end of the PFC circuit (5.2) is connected with the PWM switch power supply (5.3); the power amplifier (6) comprises a digital power amplifying circuit (6.1), an input end of the digital power amplifying circuit (6.1) is connected with an output end of a bass circuit of the frequency divider (4), and an output end of the digital power amplifying circuit (6.1) is connected with a bass loudspeaker (8.2). The sound box can save energy of the power grid and enhance sound box performance.
Description
Technical field
The utility model relates to a kind of audio amplifier.
Background technology
In the prior art, audio amplifier comprises blender, frequency divider, Switching Power Supply, power amplifier and loudspeaker.Described frequency divider is connected with described power amplifier, and described Switching Power Supply is connected with described power amplifier.The Switching Power Supply that is used on the audio amplifier of prior art comprises PWM Switching Power Supply, current rectifying and wave filtering circuit and switch transformer, the output of described current rectifying and wave filtering circuit is connected with the input of described PWM Switching Power Supply, the output of described PWM Switching Power Supply is connected with the input of described switch transformer, and the output of described switch transformer is connected with the input of described power amplifier.Power amplifier on the audio amplifier of prior art all is analog amplifier circuit.There is following defective in this kind prior art: 1, because Switching Power Supply is a kind of condenser input type circuit, power factor is lower, phase difference between its electric current and the voltage can cause the loss of exchange power, though adopt this power circuit power consumption concerning audio amplifier itself less, consumption rate is lower, but for whole electrical network, the proportion that reactive loss accounts for is bigger, can cause the waste of the energy of whole network system; 2, owing to all adopt the analog amplifier circuit in the power amplifier, analog amplifier circuit heating is big, and efficient is lower, generally about 55%, thereby the performance of audio amplifier is reduced.
The utility model content
The technical problems to be solved in the utility model is to provide a kind of and can save the electrical network energy, the audio amplifier of raising audio amplifier performance.
Technical solution of the present utility model is, a kind of audio amplifier with following structure is provided, and it comprises blender, frequency divider, Switching Power Supply, power amplifier and loudspeaker; Described frequency divider is connected with described power amplifier, and described Switching Power Supply is connected with described power amplifier; Described Switching Power Supply comprises PWM Switching Power Supply, current rectifying and wave filtering circuit, described Switching Power Supply also comprises pfc circuit, the input of described pfc circuit is connected with current rectifying and wave filtering circuit in the described Switching Power Supply, and the output of described pfc circuit is connected with described PWM Switching Power Supply; Described power amplifier comprises the digital power amplifier circuit, and the input of described digital power amplifier circuit is connected with the output of the bass circuit of described frequency divider, and the output of described digital power amplifier circuit is connected with bass horn.
After adopting above structure, the utility model audio amplifier compared with prior art has the following advantages:
1, because Switching Power Supply described in the utility model also comprises pfc circuit, improves the power factor of the power circuit of sound console, reduced the reactive loss in the electrical network, improved the utilance of electric energy in the electrical network, saved the electrical network energy.
2, because described power amplifier comprises the digital power amplifier circuit, and described digital power amplifier circuit is connected with the low-frequency channel of described frequency divider, make that the circuit heating is few, efficient is higher, generally can reach 85%-95%, thereby has improved the performance of audio amplifier.
As a kind of improvement of the present utility model, it also comprises the MP3 player, and the output of described MP3 player is connected with the input of described blender.Because the utility model audio amplifier also comprises the MP3 player, thereby can provide source of sound voluntarily, make things convenient for the field use of using and impart knowledge to students greatly, enlarge the scope of application of audio amplifier.
Description of drawings
Accompanying drawing is the circuit block diagram of the utility model audio amplifier.
Shown in the figure: 1; signal input part, 2; blender, 2.1; hybrid circuit I; 2.2; hybrid circuit II, 3; three sections balance modules, 4; frequency divider; 4.1; compressor circuit I, 4.2; 40HZ is low to cut circuit, 4.3; the bass compensation circuit; 4.4; height is cut circuit, and 4.5; compressor circuit II, 4.6; buffer circuit; 4.7; the high pitch compensating circuit, 4.8; hang down and cut circuit, 5; Switching Power Supply; 5.1; current rectifying and wave filtering circuit, 5.2; pfc circuit, 5.3; the PWM Switching Power Supply; 5.4; auxiliary switching power supply; 5.5; switch transformer, 6; power amplifier, 6.1; the digital power amplifier circuit; 6.2; the analog amplifier circuit; 6.3; protective circuit, 7; the MP3 player, 8; loudspeaker; 8.1; loudspeaker; 8.2; bass horn, 9; preposition volume control circuit, 10; total volume control circuit.
Embodiment
The utility model is described in further detail below in conjunction with the drawings and specific embodiments.
See also shown in the accompanying drawing, the utility model audio amplifier comprises signal input part 1, blender 2, three sections balance modules 3, frequency divider 4, Switching Power Supply 5, power amplifier 6, MP3 player 7 and loudspeaker 8.Described signal input part 1 is connected with described audiogenic device, is the interface of signal input.Described blender 2 mixes each road input signal, and described blender comprises hybrid circuit I2.1 and hybrid circuit II2.2.Described three sections balance modules 3 are used for the signal of input is carried out the equilibrium adjusting.Described frequency divider 4 can be a three frequency division, it also can be two divided-frequency, in this specific embodiment, described frequency divider is a two divided-frequency, sound is divided into high pitch and bass, the bass circuit of described two divided-frequency comprises that compressor circuit I4.1,40HZ are low to be cut circuit 4.2, bass compensation circuit 4.3 and height and cuts circuit 4.4, and the trebling circuit of described two divided-frequency comprises compressor circuit II4.5, buffer circuit 4.6, high pitch compensating circuit 4.7 and the low circuit 4.8 of cutting.Described Switching Power Supply 5 provides power supply for audio amplifier, this Switching Power Supply 5 comprises current rectifying and wave filtering circuit 5.1, pfc circuit 5.2, PWM Switching Power Supply 5.3, auxiliary switching power supply 5.4 and switch transformer 5.5, described pfc circuit 5.2 is an active PFC circuit, can be at the 100-240V steady operation.The signal that described power amplifier 6 is used for importing amplifies to drive loud speaker sounds, and this power amplifier comprises digital power amplifier circuit 6.1, analog amplifier circuit 6.2 and protective circuit 6.3, and described protective circuit 6.3 is used to protect analog amplifier circuit 6.2.Described MP3 player 7 is the music instruments that can play MP3 format.Described loudspeaker 8, just loud speaker is used to sound, and it comprises loudspeaker 8.1 and bass horn 8.2.It also comprises a preposition volume control circuit 9 and a total volume control circuit 10.
When circuit connects, described signal input part 1 is connected with described blender 2, the output of described blender 2 is connected with the input of described preposition volume control circuit 9, the output of described preposition volume control circuit 9 is connected with the input of described three sections balance modules 3, the output of described three sections balance modules 3 is connected with the input of described total volume control circuit 10, the output of described total volume control circuit 10 is connected with the input of described frequency divider 4, the output of described frequency divider 4 is connected with the input of described power amplifier 6, and the output of described power amplifier 6 is connected with the input of described loudspeaker 8.
The internal circuit of described blender 2 is connected to: described hybrid circuit II2.2 is connected with each road input signal, the output of described MP3 player 7 also is connected with described hybrid circuit II2.2, described hybrid circuit I2.1 is connected with line output, the output of described hybrid circuit II2.2 is connected with the input of described preposition volume control circuit 9, and the other end of described hybrid circuit I 2.1 is connected with the output of described hybrid circuit II2.2.The internal circuit of described frequency divider 4 is connected to: in the bass circuit, the output of described compressor circuit I4.1 is connected with the low input of cutting circuit 4.2 of described 40HZ, described 40HZ is low, and the output of cutting circuit 4.2 is connected with the output that described height is cut circuit 4.4, the output of described bass compensation circuit 4.3 is connected with the low input of cutting circuit 4.4 of described 40HZ, described 40HZ is low to be cut circuit 4.2 and is used to excise 40HZ and following sound, described height is cut circuit 4.4 and is used to excise the above sound of 2.5KHZ, makes sound sound clear; In the trebling circuit, the output of described compressor circuit II4.5 is connected with the input of described buffer 4.6, the output of described buffer circuit 4.6 is connected with the described low input of cutting circuit 4.8, the output of described high pitch compensating circuit 4.7 is connected with the input of described buffer circuit 4.6, the described low circuit 4.8 of cutting is used to excise the following sound of 2.5KHZ, makes sound sound clear; The input of the input of described compressor circuit I4.1 and described compressor circuit II4.2 all is connected with the output of described total volume control circuit 10.
The internal circuit of described Switching Power Supply 5 is connected to: the output of described current rectifying and wave filtering circuit 5.1 is connected with the input of described pfc circuit 5.2, the output of described pfc circuit 5.2 is connected with the input of described PWM Switching Power Supply 5.3, the output of described PWM Switching Power Supply 5.3 is connected with the input of described switch transformer 5.5, the input of described auxiliary switching power supply 5.4 is connected with the output of described current rectifying and wave filtering circuit 5.1, the output of described auxiliary switching power supply 5.4 is connected with the input of described pfc circuit 5.2, and another output of described auxiliary switching power supply 5.4 is connected with the input of described PWM Switching Power Supply 5.3.The internal circuit of described power amplifier 6 is connected to: the output that the height in the bass circuit of the input of described digital power amplifier circuit 6.1 and described frequency divider 4 is cut circuit 4.4 is connected, another input of described digital power amplifier circuit 6.1 is connected with the output of the switch transformer 5.5 of described Switching Power Supply 5, and the input of the bass horn 8.2 in the output of described digital power amplifier circuit 6.1 and the described loudspeaker 8 is connected; The low output of cutting circuit 4.8 in the trebling circuit of the input of described analog amplifier circuit 6.2 and described frequency divider 4 is connected; another input of described analog amplifier circuit 6.2 is connected with the output of the switch transformer 5.5 of described Switching Power Supply 5; the input of the loudspeaker 8.1 in the output of described analog amplifier circuit 6.2 and the described loudspeaker 8 is connected, and the output of described protective circuit 6.3 is connected with the input of described analog amplifier circuit 6.2.
During Switching Power Supply 5 work, the civil power of 220V converts the high voltage direct current of 300V to after current rectifying and wave filtering circuit 5.1 rectifying and wave-filterings, auxiliary switching power supply 5.4 is given in power supply, auxiliary switching power supply 5.4 gives pfc circuit 5.2 and 5.3 power supplies of PWM Switching Power Supply to drive its work again, high voltage direct current behind the rectifying and wave-filtering also is transferred to pfc circuit 5.2, the high voltage direct current of 5.2 pairs of inputs of pfc circuit carries out power factor correction, improve its power factor, electric current through pfc circuit 5.2 outputs flows into PWM Switching Power Supply 5.3, the electric current of 5.3 pairs of inflows of PWM Switching Power Supply carries out pulse pulse width modulation, produce high-frequency impulse, high-frequency pulse current flows into switch transformer 5.5 again, 5.5 pairs of electric currents of switch transformer carry out step-down, and the output LOW voltage direct current gives power amplifier 6 power supplies.
During entire circuit work, described signal input part 1 input signal, the signal of input mixes signal through blender 2, be transferred to three sections balance modules 3 then, after regulating, the voice signal of 3 pairs of inputs of three sections balance modules is transferred to frequency divider 4, frequency divider 4 is divided into high pitch and bass with the signal that receives, high pitch partly is transferred to analog amplifier circuit 6.2, bass part is transferred to digital power amplifier circuit 6.1, analog amplifier circuit 6.2 and digital power amplifier circuit 6.1 amplify high pitch and bass signal respectively, power amplifier 6 is transferred to high pitch loudspeaker 8.1 respectively then, and bass is transferred to bass horn 8.2, and entire work process comes to this.
Claims (2)
1. audio amplifier, it comprises blender (2), frequency divider (4), Switching Power Supply (5), power amplifier (6) and loudspeaker (8); Described frequency divider (4) is connected with described power amplifier (6), and described Switching Power Supply (5) is connected with described power amplifier (6); Described Switching Power Supply (5) comprises PWM Switching Power Supply (5.3), current rectifying and wave filtering circuit (5.1), it is characterized in that: described Switching Power Supply (5) also comprises pfc circuit (5.2), the input of described pfc circuit (5.2) is connected with current rectifying and wave filtering circuit (5.1) in the described Switching Power Supply (5), and the output of described pfc circuit (5.2) is connected with described PWM Switching Power Supply (5.3); Described power amplifier (6) comprises digital power amplifier circuit (6.1), the input of described digital power amplifier circuit (6.1) is connected with the output of the bass circuit of described frequency divider (4), and the output of described digital power amplifier circuit (6.1) is connected with bass horn (8.2).
2. audio amplifier according to claim 1 is characterized in that: it also comprises MP3 player (7), and the output of described MP3 player (7) is connected with the input of described blender (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202952009U CN201585114U (en) | 2009-12-22 | 2009-12-22 | Sound box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202952009U CN201585114U (en) | 2009-12-22 | 2009-12-22 | Sound box |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201585114U true CN201585114U (en) | 2010-09-15 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202952009U Expired - Fee Related CN201585114U (en) | 2009-12-22 | 2009-12-22 | Sound box |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201585114U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107333213A (en) * | 2017-08-30 | 2017-11-07 | 东莞中拓机械技术开发有限公司 | A kind of double 150W (PFC) the power amplifier modules of pulsewidth modulation 300W+ |
| CN107343245A (en) * | 2017-08-28 | 2017-11-10 | 东莞中拓机械技术开发有限公司 | A kind of double PWM unit power amplifier modules of pulsewidth modulation |
| CN107347172A (en) * | 2017-08-31 | 2017-11-14 | 东莞中拓机械技术开发有限公司 | A kind of pulsewidth modulation 500W+500W (DSP) power amplifier module |
| CN107360501A (en) * | 2017-08-24 | 2017-11-17 | 东莞中拓机械技术开发有限公司 | A kind of pulsewidth modulation 350W+65W power amplifier modules |
| CN107371095A (en) * | 2017-08-25 | 2017-11-21 | 东莞中拓机械技术开发有限公司 | A kind of pulsewidth modulation 350W 600W+150W power amplifier modules |
| CN107396245A (en) * | 2017-08-25 | 2017-11-24 | 东莞中拓机械技术开发有限公司 | A kind of pulsewidth modulation 700W+700W (PFC) power amplifier module |
-
2009
- 2009-12-22 CN CN2009202952009U patent/CN201585114U/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107360501A (en) * | 2017-08-24 | 2017-11-17 | 东莞中拓机械技术开发有限公司 | A kind of pulsewidth modulation 350W+65W power amplifier modules |
| CN107360501B (en) * | 2017-08-24 | 2024-02-13 | 东莞精恒电子有限公司 | Pulse width modulation 350W+65W power amplifier module |
| CN107371095A (en) * | 2017-08-25 | 2017-11-21 | 东莞中拓机械技术开发有限公司 | A kind of pulsewidth modulation 350W 600W+150W power amplifier modules |
| CN107396245A (en) * | 2017-08-25 | 2017-11-24 | 东莞中拓机械技术开发有限公司 | A kind of pulsewidth modulation 700W+700W (PFC) power amplifier module |
| CN107371095B (en) * | 2017-08-25 | 2023-12-22 | 东莞精恒电子有限公司 | Pulse width modulation 350W-600W+150W power amplifier module |
| CN107396245B (en) * | 2017-08-25 | 2023-12-22 | 东莞精恒电子有限公司 | Pulse width modulation 700W+700W (PFC) power amplifier module |
| CN107343245A (en) * | 2017-08-28 | 2017-11-10 | 东莞中拓机械技术开发有限公司 | A kind of double PWM unit power amplifier modules of pulsewidth modulation |
| CN107343245B (en) * | 2017-08-28 | 2023-12-22 | 东莞精恒电子有限公司 | Pulse width modulation double PWM unit power amplifier module |
| CN107333213A (en) * | 2017-08-30 | 2017-11-07 | 东莞中拓机械技术开发有限公司 | A kind of double 150W (PFC) the power amplifier modules of pulsewidth modulation 300W+ |
| CN107333213B (en) * | 2017-08-30 | 2024-02-13 | 东莞精恒电子有限公司 | Pulse width modulation 300 W+double 150W (PFC) power amplifier module |
| CN107347172A (en) * | 2017-08-31 | 2017-11-14 | 东莞中拓机械技术开发有限公司 | A kind of pulsewidth modulation 500W+500W (DSP) power amplifier module |
| CN107347172B (en) * | 2017-08-31 | 2023-12-22 | 东莞精恒电子有限公司 | Pulse width modulation 500W+500W (DSP) power amplifier module |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100915 Termination date: 20121222 |