CN202276412U - Stereo widening circuit and flat-panel television - Google Patents
Stereo widening circuit and flat-panel television Download PDFInfo
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- CN202276412U CN202276412U CN2011204137151U CN201120413715U CN202276412U CN 202276412 U CN202276412 U CN 202276412U CN 2011204137151 U CN2011204137151 U CN 2011204137151U CN 201120413715 U CN201120413715 U CN 201120413715U CN 202276412 U CN202276412 U CN 202276412U
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- operational amplifier
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Abstract
The utility model relates to a stereo widening circuit and a flat-panel television. The circuit comprises a left channel audio processing module, a right channel audio processing module, a channel-switching switch and a control module; the left channel audio processing module comprises a first operational amplifier, the right channel audio processing module comprises a second operational amplifier, and the reverse input ends of the first operational amplifier and the second operational amplifier are respectively connected with the channel-switching switch; the output end of the second operational amplifier is connected with the reverse input end of the second operational amplifier; and the control module controls the channel-switching switch to be switched on to electrically connect the left channel audio processing module with the right channel audio processing module. The utility model utilizes the control module to control the channel-switching switch to switch the input of the audio signals in the left channel audio processing module and the right channel audio processing module, so that the inverted signals of the other channel can be mixed into the left channel audio processing module or the right channel audio processing module, consequently, the obtained actual sound is larger than the mounting distance between speakers, the purpose for widening the sound is achieved, the circuit structure is simplified, and the cost is low.
Description
Technical field
The utility model relates to electronic technology field, specifically is stero set widening circuit and panel TV.
Background technology
Panel TV is exactly the TV that screen is the plane; It is one type of television set for the body huge with respect to the conventional picture tube television set made comparisons, and comprises that mainly liquid crystal display LCD (Liquid Crystal Display), plasma show the tv product of PDP (Plasma Display Panel), ORGANIC ELECTROLUMINESCENCE DISPLAYS OLED (Organic Light Emitting Display), SED SED several big type of skills such as (Surface-conduction Electron-emitter Display).At present, also there is shortcoming in panel TV aspect sound equipment: because two loudspeaker make stereophonic effect not obvious by too near.A kind of technology that provides at present is to utilize special digital audio DSP (digital signal processor) integrated circuit to realize, but this DSP integrated circuit structure is complicated, cost is high.
In the prior art, a kind of broadening audio-visual technology that improves audiovisual effect is arranged, this method is: respectively get a signal from left and right acoustic channels and come out; After amplifying through anti-phase, be input in proportion again in the other side's the signal input part and go, reach the effect of broadening phonotape and videotape with this; It is many that but the shortcoming of this method is an element, complicated circuit, left and right acoustic channels handoff procedure more complicated; Cause cost high, practicality is not strong.
The utility model content
The main purpose of the utility model provides a kind of stero set widening circuit and panel TV, solves complex structure of the prior art, and defect of high cost reaches the purpose of broadening sound equipment.
The utility model solves the technical scheme that its technical problem adopted:
A kind of stero set widening circuit comprises: right audio channel processing module, sound channel diverter switch and the control module of handling and export L channel audio processing modules, processing and the output right channel audio signal of left channel audio signal;
Wherein, Said L channel audio processing modules comprises first operational amplifier; Said right audio channel processing module comprises second operational amplifier, and the reverse input end of said first operational amplifier and said second operational amplifier is connected with said sound channel diverter switch respectively; The output of said first operational amplifier is connected with the reverse input end of said first operational amplifier through the 3rd resistance; The output of said second operational amplifier is connected with the reverse input end of said second operational amplifier through the 4th resistance;
Wherein, Said control module is connected with said sound channel diverter switch; And through controlling the unlatching of said sound channel diverter switch; Said L channel audio processing modules is electrically connected with said right audio channel processing module, makes the signal of reverse input end of said first operational amplifier import said second operational amplifier, and make the signal of reverse input end of said second operational amplifier import in said first operational amplifier.
Preferably, said sound channel diverter switch is an electronic switch.
Preferably, said control module comprises:
The unlatching of first triode, second triode that is connected with said first triode, said first triode of control and said second triode and closed microprocessor.
Preferably; Said microprocessor is connected with the base stage of said second triode through the 8th resistance; The collector electrode of said second triode is connected with the base stage of said first triode through the 7th resistance, and the collector electrode of said first triode is connected with the control end of said electronic switch through the 6th resistance.
Preferably, the positive input of said first operational amplifier is through first grounding through resistance.
Preferably, the positive input of said second operational amplifier is through second grounding through resistance.
Preferably, the grounded emitter of said second triode.
The utility model embodiment also provides a kind of panel TV to comprise above-mentioned any stero set widening circuit.
Implement the technical scheme of the utility model; Has following beneficial effect: stero set widening circuit and panel TV that the utility model provides; Switch the audio signal in the input left and right acoustic channels processing module through control module control track diverter switch, make to obtain the actual sound greater than the loudspeaker installing space by the inversion signal of all having sneaked into another passage in the left and right sound channels processing module; Reached the purpose of broadening sound equipment, simplified the structure, reduce cost.
Description of drawings
The circuit structure diagram that Fig. 1 provides for the utility model embodiment.
The realization of the utility model purpose, functional characteristics and advantage will combine embodiment, further specify with reference to accompanying drawing.
Embodiment
For the purpose, technical scheme and the advantage that make the utility model is clearer,, the utility model is further elaborated below in conjunction with accompanying drawing and embodiment.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.
The utility model embodiment provides a kind of stero set widening circuit, and is as shown in Figure 1, comprising:
L channel audio processing modules 400, right audio channel processing module 300, sound channel diverter switch 200 and control module 100; L channel audio processing modules 400 connects right audio channel processing module 300 through sound channel diverter switch 200; This L channel audio processing modules 400 is used for handling and the output left channel audio signal, and right audio channel processing module 300 is used for handling and the output right channel audio signal.
Wherein, L channel audio processing modules 400 comprises: the first operational amplifier OP1; The reverse input end of this first operational amplifier OP1 connects the reverse input end of the output of sound channel diverter switch 200, the first operational amplifier OP1 through the 3rd resistance R 3 connections first operational amplifier OP1.The positive input of the first operational amplifier OP1 receives the first audio signal Li of input, the first audio signal Lo after the output output process computing processing and amplifying of the first operational amplifier OP1.The 3rd resistance R 3 determines the voltage gain of the first operational amplifier OP1.In addition, the positive input of the first operational amplifier OP1 is through first resistance R, 1 ground connection GND.
Wherein, Right audio channel processing module 300 comprises: the second operational amplifier OP2; The reverse input end of the second operational amplifier OP2 connects the reverse input end of the output of sound channel diverter switch 200, the second operational amplifier OP2 through the 4th resistance R 4 connections second operational amplifier OP2.The positive input of the second operational amplifier OP2 receives the second audio signal Ri of input, the second audio signal Ro after the output output process computing processing and amplifying of the second operational amplifier OP2.The 4th resistance R 4 determines the voltage gain of the second operational amplifier OP2.In addition, the positive input of the second operational amplifier OP2 is through second resistance R, 2 ground connection.The first operational amplifier OP1 and the second operational amplifier OP2 connect into in-phase amplifier.Wherein, Said control module 100 is connected with said sound channel diverter switch 200; The unlatching of the said sound channel diverter switch 200 of control module 100 controls; Said L channel audio processing modules 400 is electrically connected with said right audio channel processing module 300, makes the signal of reverse input end of the said first operational amplifier OP1 import the said second operational amplifier OP2, and make the signal of reverse input end of the said second operational amplifier OP2 import among the said first operational amplifier OP1.
In the present embodiment; Sound channel diverter switch 200 can be any device with switching function; This is not limited here; As preferably, this sound channel diverter switch 200 is electronic switch K, and this electronic switch is connected between the reverse input end of reverse input end and the second operational amplifier OP2 of the first operational amplifier OP1.Particularly, electronic switch K connects the reverse input end of the first operational amplifier OP1, and perhaps electronic switch K connects the reverse input end of the second operational amplifier OP2 through the 5th resistance R 5.Further, in the Audio Processing process, the 5th resistance R 5 plays the dividing potential drop effect with the 3rd resistance R 3, and perhaps the 5th resistance R 5 plays the effect of dividing potential drop with the 4th resistance R 4, realizes the amplification to audio signal.
In the present embodiment, particularly, control module 100 comprises: the unlatching of the first triode Q1, the second triode Q2 that is connected with the said first triode Q1, the said first triode Q1 of control and the said second triode Q2 and closed microprocessor (MCU).In Fig. 1; Microprocessor is connected with the base stage of the second triode Q2 through the 8th resistance R 8; The collector electrode of the second triode Q2 is connected with the base stage of the first triode Q1 through the 7th resistance R 7, and the collector electrode of the first triode Q1 is connected with the control end of electronic switch K through the 6th resistance R 6.The voltage of the emitter access+5V of the first triode Q1.In addition, the grounded emitter of second triode.
Concerning L channel audio processing modules 400; The second audio input signal Ri of right audio channel processing module 300 at the reverse input end of the second operational amplifier OP2 is and the second audio output signal Ro same-phase; This second audio input signal Ri is added to the reverse input end of the first operational amplifier OP1 of L channel audio processing modules through the 5th resistance R 5 and the 3rd resistance R 3 dividing potential drops; Be equivalent to the first operational amplifier OP1 that reverse 180 degree of the second audio input signal Ri of part R channel are added to L channel audio processing modules 400 is amplified, and with L channel audio processing modules 400 in the input first audio signal Li mix, in like manner the first audio signal Li of L channel is added to the reverse input end of the right audio channel processing module second operational amplifier OP2 through the 5th resistance R 5 and the 4th resistance R 4 dividing potential drops; Being equivalent to the second operational amplifier OP2 that the first audio signal Li carries out being added to right audio channel processing module 300 behind reverse 180 degree amplifies; And mix with the second audio input signal Ri of right audio channel processing module 300 input, reached the purpose of sound broadening, wherein; Above-mentioned handoff procedure is accomplished by the first triode Q1 and second triode Q2 control; Detailed process is: when microprocessor (MCU) was exported the control signal (as: level of+5V) of high level, this control signal was input to the second triode Q2 through the 8th resistance R 8, so the base stage of this second triode Q2 is a high level; This second triode of conducting Q2; Its current collection is low level very, and the collector electrode of the second triode Q2 outputs a control signal on the base stage of the first triode Q1 through the 7th resistance R 7, the emitter connection+5V power supply of this first triode Q1; Therefore the voltage of the emitter of this first triode is higher than the voltage of its base stage; Therefore this first triode Q1 conducting, its collector electrode connects electronic switch K, conducting electronic switch K through the 6th resistance R 6; Two channel audio processing modules are communicated with about making; Make to obtain the actual sound greater than the loudspeaker installing space by the audio input signal of all having sneaked into another sound channel processing module in L channel processing module or the R channel processing module, be stereo broadening pattern this moment.When microprocessor output low level (as: 0V), the base stage of this second triode Q2 is a low level, and collector electrode is a high level; Therefore this triode Q2 can not conducting, because the base stage of this first triode Q1 is a high level, so this first triode Q1 also ends; Power supply is provided therefore can not for electronic switch K; This electronic switch breaks off, and at this moment, electronic switch K breaks off the connection of two channel audio processing modules; The left and right acoustic channels audio processing modules does not all have the audio input signal of other right audio channel processing modules, and be the stereo mode of standard this moment.
This stero set widening circuit switches the audio input signal in the input left and right acoustic channels processing module through control module control track diverter switch; Make the audio input signal of all having sneaked into another sound channel processing module in L channel processing module or the R channel processing module; Obtain the actual sound greater than the loudspeaker installing space; Reached the purpose of broadening sound equipment, this circuit structure is simple, and the left and right acoustic channels handoff procedure simply, also can reduce cost to a certain extent.
The utility model embodiment also provides a kind of television set, comprises the stero set widening circuit that the foregoing description provides.
The television set of present embodiment is provided with the stero set widening circuit like above-mentioned embodiment; This circuit switches the audio input signal in the input left and right acoustic channels processing module through control module control track diverter switch; Make the audio input signal of all having sneaked into another sound channel processing module in L channel processing module or the R channel processing module; Obtain the actual sound greater than the loudspeaker installing space; Reached the purpose of broadening sound equipment, this circuit structure is simple, and the left and right acoustic channels handoff procedure has reduced cost simply, to a certain extent.
More than be merely the preferred embodiment of the utility model,, any modification of being done within all spirit at the utility model and the principle, be equal to and replace and improvement etc., all should be included within the protection range of the utility model not in order to restriction the utility model.
Claims (8)
1. a stero set widening circuit is characterized in that, comprising: right audio channel processing module, sound channel diverter switch and the control module of handling and export L channel audio processing modules, processing and the output right channel audio signal of left channel audio signal;
Wherein, Said L channel audio processing modules comprises first operational amplifier; Said right audio channel processing module comprises second operational amplifier, and the reverse input end of said first operational amplifier and said second operational amplifier is connected with said sound channel diverter switch respectively; The output of said first operational amplifier is connected with the reverse input end of said first operational amplifier through the 3rd resistance; The output of said second operational amplifier is connected with the reverse input end of said second operational amplifier through the 4th resistance;
Wherein, Said control module is connected with said sound channel diverter switch; And through controlling the unlatching of said sound channel diverter switch; Said L channel audio processing modules is electrically connected with said right audio channel processing module, makes the signal of reverse input end of said first operational amplifier import said second operational amplifier, and make the signal of reverse input end of said second operational amplifier import in said first operational amplifier.
2. stero set widening circuit according to claim 1 is characterized in that said sound channel diverter switch is an electronic switch.
3. like the said stero set widening circuit of claim 2, it is characterized in that said control module comprises:
The unlatching of first triode, second triode that is connected with said first triode, said first triode of control and said second triode and closed microprocessor.
4. like the said stero set widening circuit of claim 3; It is characterized in that; Said microprocessor is connected with the base stage of said second triode through the 8th resistance; The collector electrode of said second triode is connected with the base stage of said first triode through the 7th resistance, and the collector electrode of said first triode is connected with the control end of said electronic switch through the 6th resistance.
5. like the said stero set widening circuit of claim 4, it is characterized in that the positive input of said first operational amplifier is through first grounding through resistance.
6. like the said stero set widening circuit of claim 5, it is characterized in that the positive input of said second operational amplifier is through second grounding through resistance.
7. like the said stero set widening circuit of claim 6, it is characterized in that the grounded emitter of said second triode.
8. a panel TV is characterized in that, comprises any described stero set widening circuit among the claim 1-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204137151U CN202276412U (en) | 2011-10-26 | 2011-10-26 | Stereo widening circuit and flat-panel television |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204137151U CN202276412U (en) | 2011-10-26 | 2011-10-26 | Stereo widening circuit and flat-panel television |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202276412U true CN202276412U (en) | 2012-06-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204137151U Expired - Lifetime CN202276412U (en) | 2011-10-26 | 2011-10-26 | Stereo widening circuit and flat-panel television |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202276412U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107920308A (en) * | 2017-12-21 | 2018-04-17 | 珠海斯巴克电子设备有限公司 | A kind of amplifier IC and electron tube mixed audio output circuit |
-
2011
- 2011-10-26 CN CN2011204137151U patent/CN202276412U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107920308A (en) * | 2017-12-21 | 2018-04-17 | 珠海斯巴克电子设备有限公司 | A kind of amplifier IC and electron tube mixed audio output circuit |
| CN107920308B (en) * | 2017-12-21 | 2024-03-12 | 珠海斯巴克电子设备有限公司 | Mixed audio output circuit of operational amplifier IC and valve |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120613 |