CN206472292U - With the stereo Karaoke power amplifier that input control is Jing Yin - Google Patents
With the stereo Karaoke power amplifier that input control is Jing Yin Download PDFInfo
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- CN206472292U CN206472292U CN201720065516.3U CN201720065516U CN206472292U CN 206472292 U CN206472292 U CN 206472292U CN 201720065516 U CN201720065516 U CN 201720065516U CN 206472292 U CN206472292 U CN 206472292U
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- comparison amplifier
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Abstract
The utility model discloses a kind of Jing Yin stereo karaoke circuit of band input control, the output end of each road microphone input interface is connected to comparison amplifier, comparison amplifier output signal is connected respectively to the input of Jing Yin module, each road microphone input interface is connected with the first reverb module and the second reverb module respectively, the output of first reverb module is connected with L channel amplification module, the output of second reverb module is connected with R channel amplification module, the output of L channel amplification module is connected with L channel output module, the output of R channel amplification module is connected with R channel output module, the output end of Jing Yin module is connected between the output of L channel amplification module and L channel output module, and between the output of R channel amplification module and R channel output module.Jing Yin module is provided with the utility model, for realizing that loudspeaker output mute is controlled, it is possible to resolve noise problem when microphone is without input.
Description
Technical field
The utility model discloses a kind of sound equipment power amplifier, the Jing Yin stereo Karaoke of particularly a kind of band input control
Circuit, belongs to household electrical appliance control field of circuit technology.
Background technology
Sound equipment and power amplifier are the essential part of home theater, are used widely already in people live,
Power amplifier external tv machine, microphone and sound equipment etc., are used as source of sound switching synthesis device, by microphone and DVD etc. by power amplifier
Source of sound is synthesized together, and is played out by sound equipment.When in use, microphone and sound equipment are plugged on power amplifier simultaneously for power amplifier,
Microphone input is amplified by power amplifier, when people are without using microphone, microphone is placed on desk or other
Position, and microphone is still within working condition, the sound for picking up surrounding environment, and be amplified by power amplifier, now
The sound that sound equipment is played is noise, influences the mood of people, how to realize that loudspeaker is normally defeated when microphone is normally inputted
Go out, when not in use, loudspeaker is also without output, into industry urgent problem to be solved for microphone.
The content of the invention
The shortcoming of input noise can be produced for Karaoke power amplifier of the prior art mentioned above, this practicality is new
Type provides a kind of band input control Jing Yin stereo Karaoke power amplifier, and it is exported in L channel output module and R channel
Jing Yin module is connected with module, for realizing that loudspeaker output mute is controlled.
The utility model solve its technical problem use technical scheme be：A kind of Jing Yin three-dimensional sound card of band input control
Draw OK power amplifiers, power amplifier include all the way more than microphone input interface, the first reverb module, the second reverb module,
L channel amplification module, R channel amplification module, L channel output module, there are sound channel output module and Jing Yin module, each road
The output end of microphone input interface is connected to comparison amplifier, and comparison amplifier output signal is connected respectively to Jing Yin mould
The input of block, each road microphone input interface is connected with the first reverb module and the second reverb module respectively, the first reverberation mould
Block output is connected with L channel amplification module, and the output of the second reverb module is connected with R channel amplification module, L channel amplification mould
Block output is connected with L channel output module, and the output of R channel amplification module is connected with R channel output module, Jing Yin module
Output end is connected between the output of L channel amplification module and L channel output module, and the output of R channel amplification module and the right side
Between sound channel output module.
The technical scheme that the utility model solves the use of its technical problem further comprises：
Described L channel amplification module includes L channel primary amplifying circuit, L channel secondary amplification circuit and L channel
Power regulation module, L channel primary amplifying circuit uses comparison amplifier IC10A, and L channel secondary amplification circuit, which is used, to be compared
Amplifier IC9A, the first reverb module exports audio signal is connected to comparison amplifier IC10A inverting input, compares amplification
Device IC10A in-phase input end ground connection, comparison amplifier IC10A output end is connected to through L channel power regulation module to be compared
Amplifier IC9A inverting input, comparison amplifier IC9A in-phase input end ground connection, comparison amplifier IC9A output end
It is connected with L channel output module, L channel power regulation module includes three potentiometers being connected in parallel；Described R channel
Amplification module includes R channel primary amplifying circuit, R channel secondary amplification circuit and R channel power regulation module, R channel
Primary amplifying circuit uses comparison amplifier IC10B, and R channel secondary amplification circuit uses comparison amplifier IC9B, the first reverberation
Module exports audio signal is connected to comparison amplifier IC10B inverting input, comparison amplifier IC10B in-phase input end
Ground connection, comparison amplifier IC10B output end is connected to the anti-phase defeated of comparison amplifier IC9B through R channel power regulation module
Enter end, comparison amplifier IC9B in-phase input end ground connection, comparison amplifier IC9B output end and R channel output module connect
Connect, R channel power regulation module includes three potentiometers being connected in parallel.
Described L channel output module includes the output capacitance C84 and output matching resistance R82 being connected in series；R channel
Output module includes the output capacitance C85 and output matching resistance R83 being connected in series.
Model T62 chip is respectively adopted in described the first reverb module and the second reverb module.
Described Jing Yin module compares amplification module, Jing Yin secondary including Jing Yin primary and compares amplification module, filtration module
And L channel control module and R channel control module, microphone input interface is connected to Jing Yin primary and compares amplification module
On input, the output end that Jing Yin primary compares amplification module is connected to Jing Yin secondary and compared on the input of amplification module, quiet
The output end that sound secondary compares amplification module is connected with filtration module, and L channel control module and R channel control module connect respectively
It is connected on filtration module.
Described Jing Yin primary compares amplification module using comparison amplifier IC11A, and microphone input interface is connected to ratio
On inverting input compared with amplifier IC11A, comparison amplifier IC11A in-phase input end connection signal ground, Jing Yin secondary ratio
Comparison amplifier IC11B is used compared with amplification module, comparison amplifier IC11A output end is connected to comparison amplifier IC11B's
On inverting input, resistor voltage divider network, comparison amplifier IC11B are connected with comparison amplifier IC11B in-phase input end
Inverting input be grounded by resistance R114.
Described resistor voltage divider network includes the resistance R116 and resistance R113 being connected in series, and resistance R116 resistances are 560K
Ω, resistance R113 resistance are 2.7K Ω, and resistance R116 is connected with+15V power supplys, resistance R113 ground connection, resistance R116 and resistance
R113 common port is connected on comparison amplifier IC11B in-phase input end.
Described filtration module includes electric capacity C105, electric capacity C106 and resistance R119, and resistance R119 is serially connected in secondary and compared
Between amplification module and L channel control module and R channel control module, electric capacity C105 be connected to resistance R119 input and
Between ground, electric capacity C106 is connected between resistance R119 output end and ground.
Described L channel control module uses triode Q1, and filtration module output end is connected to triode Q1 base stage
On, triode Q1 grounded emitter, triode Q1 colelctor electrode is connected in L channel output end；R channel control module is adopted
Triode Q2 is used, filtration module output end is connected in triode Q2 base stage, triode Q2 grounded emitter, triode Q2
Colelctor electrode be connected in R channel output end.
Described primary compares to be connected between the output end of amplification module and the secondary reverse input end for being compared amplification module
There is adjustment of sensitivity module, adjustment of sensitivity module includes the resistance R115 and electric capacity C87 being connected in series, and resistance R115 is connected to
Primary compares between the output end of amplification module and the secondary reverse input end for being compared amplification module, electric capacity C87 ground connection.
The beneficial effects of the utility model are：The utility model connects on L channel output module and R channel output module
Jing Yin module is connected to, for realizing that loudspeaker output mute is controlled, when microphone is normally inputted, loudspeaker can be exported normally,
When microphone is without input, Jing Yin, noise problem during so as to solve microphone without input is realized in loudspeaker output.
The utility model is described further below in conjunction with the drawings and specific embodiments.
Brief description of the drawings
Fig. 1 is the utility model circuit block diagram.
Fig. 2 is the utility model circuit theory diagrams.
Fig. 3 is the utility model dio Output Modules circuit theory diagrams.
Fig. 4 is the utility model reverb module circuit theory diagrams.
Fig. 5 is the utility model Audio Input Modules circuit theory diagrams.
Fig. 6 is the utility model mic mute modular circuit schematic diagram.
Embodiment
The present embodiment is the utility model preferred embodiment, and other all its principle and basic structure are identical with the present embodiment
Or approximate, within the utility model protection domain.
Accompanying drawing 1 and accompanying drawing 2 are refer to, the utility model is mainly mixed including microphone input interface all the way above, first
Ring module, the second reverb module, L channel amplification module, R channel amplification module, L channel output module, have sound channel export mould
In block and Jing Yin module, the present embodiment, microphone input interface is provided with three, the output end point of three microphone input interfaces
Comparison amplifier is not connected with, the audio signal that microphone input interface is inputted is amplified, comparison amplifier output signal
The input of Jing Yin module is connected respectively to, for controlling Jing Yin module to work, three microphone input interfaces are respectively with first
Reverb module and the connection of the second reverb module（In the present embodiment, the mode of its interface links is connected）, the output of the first reverb module
It is connected with L channel amplification module, L channel amplification module, the output of the second reverb module is given by the audio information transmissions after reverberation
It is connected with R channel amplification module, R channel amplification module is given by the audio information transmissions after reverberation, L channel amplification module is defeated
Go out and be connected with L channel output module, the audio-frequency information after amplification is exported through L channel output module, R channel amplification module
Output be connected with R channel output module, by the audio-frequency information after amplification through R channel output module output, Jing Yin module it is defeated
Go out end to be connected between the output of L channel amplification module and L channel output module, and the output of R channel amplification module and right sound
Between road output module.
It refer in accompanying drawing 3, the present embodiment, L channel amplification module is identical with R channel amplification module structure, now with a left side
Exemplified by sound channel, amplification module is introduced, in the present embodiment, L channel amplification module is included using comparison amplifier IC10A
The primary amplifying circuit of composition, the first reverb module exports audio signal is connected to comparison amplifier IC10A inverting input
On, comparison amplifier IC10A in-phase input end ground connection, the comparison amplifier IC10A power-adjusted module connection of output end
On comparison amplifier IC9A inverting input, comparison amplifier IC9A in-phase input end ground connection, comparison amplifier IC9A
Output end be connected with L channel output module, the secondary amplification circuit that comparison amplifier IC9A is constituted, in the present embodiment, power
Adjusting module is using three potentiometers realizations in parallel, the regulation for multiplication factor.In the present embodiment, L channel output module
Including the output capacitance C84 and output matching resistance R82 being connected in series；R channel output module includes the output electricity being connected in series
Hold C85 and output matching resistance R83.
It refer in accompanying drawing 4, the present embodiment, the first reverb module is realized using model T62 chip, specific implementation
When, it would however also be possible to employ other have the chip of identical function, and the first reverb module peripheral circuit uses conventional connected mode, this
In embodiment, the second reverb module and the first reverb module circuit structure are identical, and here is omitted.
Refer in accompanying drawing 5, the present embodiment, microphone input interface input signal all the way with the first reverb module and second
Reverb module is connected, and another road is connected with comparison amplifier, in the present embodiment, is carried out by taking first via microphone input interface as an example
Illustrate, microphone input interface input signal is connected with comparison amplifier IC4A, comparison amplifier IC4A output end with it is Jing Yin
Module is connected, and the comparison amplifier output end in other two-way microphone input interfaces is also connected with Jing Yin module, as long as three tunnels
There is normal input all the way in microphone input interface, then can control Jing Yin module and release mute state.
Refer in accompanying drawing 6, the present embodiment, Jing Yin module including primary compare amplification module, secondary compare amplification module,
Filtration module and L channel control module and R channel control module, the primary that microphone input interface is connected to compare amplification mould
On the input of block, the primary output end for comparing amplification module is connected to secondary and compared on the input of amplification module, secondary ratio
Output end compared with amplification module is connected with filtration module, and L channel control module and R channel control module are connected to filtering
In module.In the present embodiment, primary compares amplification module and is connected to comparison amplifier using comparison amplifier IC11A, electric capacity C86
On IC11A inverting input, comparison amplifier IC11A in-phase input end connection signal ground, when microphone has normal audio
During input, low level, comparison amplifier IC11A are produced in comparison amplifier IC11A inverting input sensing by electric capacity C86
Anti-phase input terminal potential be less than comparison amplifier IC11A homophase input terminal potential, the high electricity of comparison amplifier IC11A outputs
Flat, when microphone has noise input to produce spike, comparison amplifier IC11A anti-phase input terminal potential, which is higher than to compare, to be put
Big device IC11A homophase input terminal potential, comparison amplifier IC11A output low levels.In the present embodiment, secondary compares amplification mould
Block uses comparison amplifier IC11B, and comparison amplifier IC11A output end is connected to comparison amplifier IC11B anti-phase input
On end, it is connected with comparison amplifier IC11B in-phase input end in resistor voltage divider network, the present embodiment, resistor voltage divider network
Including the resistance R116 and resistance R113 being connected in series, resistance R116 resistances are 560K Ω, and resistance R113 resistances are 2.7K Ω, electricity
Resistance R116 is connected with+15V power supplys, resistance R113 ground connection, and resistance R116 and resistance R113 common port are connected to comparison amplifier
On IC11B in-phase input end, comparison amplifier IC11B inverting input is grounded by resistance R114.
In the present embodiment, filtration module includes electric capacity C105, electric capacity C106 and resistance R119, and resistance R119 is serially connected in secondary
Compare between amplification module and L channel control module and R channel control module, electric capacity C105 is connected to resistance R119 input
End（In the present embodiment, resistance R119 input and output end are for signal trend）Between ground, electric capacity
C106 is connected between resistance R119 output end and ground, and can filter out secondary by filtration module compares the production of amplification module output end
Raw spike noise.
In the present embodiment, L channel control module uses triode Q1, and filtration module output end is connected to triode Q1's
In base stage, triode Q1 grounded emitter, triode Q1 colelctor electrode is connected in L channel output end；R channel controls mould
Block uses triode Q2, and filtration module output end is connected in triode Q2 base stage, triode Q2 grounded emitter, three poles
Pipe Q2 colelctor electrode is connected in R channel output end.
In the present embodiment, primary compares between the output end of amplification module and the secondary reverse input end for being compared amplification module
Adjustment of sensitivity module is connected with, adjustment of sensitivity module includes the resistance R115 and electric capacity C87 being connected in series, and resistance R115 connects
It is connected between the primary output end for comparing amplification module and the secondary reverse input end for being compared amplification module, electric capacity C87 ground connection is led to
The size for changing electric capacity C87 is crossed, the sensitivity of microphone input can be adjusted.
The utility model when in use, when microphone has normal audio input, by electric capacity C86 in comparison amplifier
IC11A inverting input sensing produces low level, and comparison amplifier IC11A anti-phase input terminal potential is less than comparison amplifier
IC11A homophase input terminal potential, comparison amplifier IC11A output high level, comparison amplifier IC11B then exports low level,
Triode Q1 and triode Q2 cut-offs, L channel and R channel are normally exported；When microphone has noise input to produce spike
When, comparison amplifier IC11A anti-phase input terminal potential is higher than comparison amplifier IC11A homophase input terminal potential, compares and puts
Big device IC11A output low levels, comparison amplifier IC11B then exports high level, triode Q1 and triode Q2 conductings, L channel
It is pulled low with R channel output end, then no signal is exported for L channel and R channel.
The utility model is connected with Jing Yin module on L channel output module and R channel output module, is raised for realizing
Sound device output mute is controlled, and when microphone is normally inputted, loudspeaker can be exported normally, when microphone is without input, loudspeaker
Jing Yin, noise problem during so as to solve microphone without input is realized in output.
Claims (10)
1. a kind of Jing Yin stereo Karaoke power amplifier of band input control, it is characterized in that：Described power amplifier includes one
More than road microphone input interface, the first reverb module, the second reverb module, L channel amplification module, R channel amplification mould
Block, L channel output module, there are sound channel output module and Jing Yin module, the output end of each road microphone input interface connects respectively
Comparison amplifier is connected to, comparison amplifier output signal is connected respectively to the input of Jing Yin module, and each road microphone input connects
Mouth is connected with the first reverb module and the second reverb module respectively, and the output of the first reverb module is connected with L channel amplification module,
The output of second reverb module is connected with R channel amplification module, and the output of L channel amplification module is connected with L channel output module,
The output of R channel amplification module is connected with R channel output module, and it is defeated that the output end of Jing Yin module is connected to L channel amplification module
Go out between L channel output module, and between the output of R channel amplification module and R channel output module.
2. the Jing Yin stereo Karaoke power amplifier of band input control according to claim 1, it is characterized in that：Described
L channel amplification module includes L channel primary amplifying circuit, L channel secondary amplification circuit and L channel power regulation module,
L channel primary amplifying circuit uses comparison amplifier IC10A, and L channel secondary amplification circuit uses comparison amplifier IC9A, the
One reverb module exports audio signal is connected to comparison amplifier IC10A inverting input, comparison amplifier IC10A same phase
Input end grounding, comparison amplifier IC10A output end is connected to comparison amplifier IC9A's through L channel power regulation module
Inverting input, comparison amplifier IC9A in-phase input end ground connection, comparison amplifier IC9A output end and L channel are exported
Module is connected, and L channel power regulation module includes three potentiometers being connected in parallel；Described R channel amplification module includes
R channel primary amplifying circuit, R channel secondary amplification circuit and R channel power regulation module, R channel primary amplifying circuit
Using comparison amplifier IC10B, R channel secondary amplification circuit uses comparison amplifier IC9B, the first reverb module output audio
Signal is connected to comparison amplifier IC10B inverting input, and comparison amplifier IC10B in-phase input end ground connection is compared and put
Big device IC10B output end is connected to comparison amplifier IC9B inverting input through R channel power regulation module, compares and puts
Big device IC9B in-phase input end ground connection, comparison amplifier IC9B output end is connected with R channel output module, R channel work(
Rate adjusting module includes three potentiometers being connected in parallel.
3. the Jing Yin stereo Karaoke power amplifier of band input control according to claim 1, it is characterized in that：Described
L channel output module includes the output capacitance C84 and output matching resistance R82 being connected in series；R channel output module includes string
Join the output capacitance C85 and output matching resistance R83 of connection.
4. the Jing Yin stereo Karaoke power amplifier of band input control according to claim 1, it is characterized in that：Described
Model T62 chip is respectively adopted in first reverb module and the second reverb module.
5. the Jing Yin stereo Karaoke power amplifier of band input control as claimed in any of claims 1 to 4, its
It is characterized in：Described Jing Yin module including Jing Yin primary compare amplification module, Jing Yin secondary compare amplification module, filtration module with
And L channel control module and R channel control module, microphone input interface is connected to Jing Yin primary and compares the defeated of amplification module
Enter on end, the output end that Jing Yin primary compares amplification module is connected to Jing Yin secondary and compared on the input of amplification module, Jing Yin
The output end that secondary compares amplification module is connected with filtration module, and L channel control module and R channel control module are connected respectively
On filtration module.
6. the Jing Yin stereo Karaoke power amplifier of band input control according to claim 5, it is characterized in that：Described
Jing Yin primary compares amplification module using comparison amplifier IC11A, and microphone input interface is connected to comparison amplifier IC11A's
On inverting input, comparison amplifier IC11A in-phase input end connection signal ground, Jing Yin secondary compare amplification module use than
Compared with amplifier IC11B, comparison amplifier IC11A output end is connected on comparison amplifier IC11B inverting input, is compared
Resistor voltage divider network is connected with amplifier IC11B in-phase input end, comparison amplifier IC11B inverting input passes through electricity
Hinder R114 ground connection.
7. the Jing Yin stereo Karaoke power amplifier of band input control according to claim 6, it is characterized in that：Described
Resistor voltage divider network includes the resistance R116 and resistance R113 being connected in series, and resistance R116 resistances are 560K Ω, resistance R113 resistances
It is worth and is connected for 2.7K Ω, resistance R116 with+15V power supplys, resistance R113 ground connection, resistance R116 and resistance R113 common port connection
On comparison amplifier IC11B in-phase input end.
8. the Jing Yin stereo Karaoke power amplifier of band input control according to claim 5, it is characterized in that：Described
Filtration module includes electric capacity C105, electric capacity C106 and resistance R119, and the secondary that resistance R119 is serially connected in compares amplification module and left sound
Between road control module and R channel control module, electric capacity C105 is connected between resistance R119 input and ground, electric capacity
C106 is connected between resistance R119 output end and ground.
9. the Jing Yin stereo Karaoke power amplifier of band input control according to claim 5, it is characterized in that：Described
L channel control module uses triode Q1, and filtration module output end is connected in triode Q1 base stage, triode Q1 hair
Emitter grounding, triode Q1 colelctor electrode is connected in L channel output end；R channel control module uses triode Q2, filtering
Module output end is connected in triode Q2 base stage, and triode Q2 grounded emitter, triode Q2 colelctor electrode is connected to
In R channel output end.
10. the Jing Yin stereo Karaoke power amplifier of band input control according to claim 5, it is characterized in that：It is described
Primary compare and be connected with adjustment of sensitivity between the output end of amplification module and the secondary reverse input end for being compared amplification module
Module, adjustment of sensitivity module includes the resistance R115 and electric capacity C87 being connected in series, and the primary that resistance R115 is connected to compares amplification
Between the output end of module and the secondary reverse input end for being compared amplification module, electric capacity C87 ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720065516.3U CN206472292U (en) | 2017-01-19 | 2017-01-19 | With the stereo Karaoke power amplifier that input control is Jing Yin |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720065516.3U CN206472292U (en) | 2017-01-19 | 2017-01-19 | With the stereo Karaoke power amplifier that input control is Jing Yin |
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| Publication Number | Publication Date |
|---|---|
| CN206472292U true CN206472292U (en) | 2017-09-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720065516.3U Expired - Fee Related CN206472292U (en) | 2017-01-19 | 2017-01-19 | With the stereo Karaoke power amplifier that input control is Jing Yin |
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| Country | Link |
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| CN (1) | CN206472292U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114205717A (en) * | 2021-11-19 | 2022-03-18 | 深圳摩罗志远科技有限公司 | Earphone amplifier circuit |
-
2017
- 2017-01-19 CN CN201720065516.3U patent/CN206472292U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114205717A (en) * | 2021-11-19 | 2022-03-18 | 深圳摩罗志远科技有限公司 | Earphone amplifier circuit |
| CN114205717B (en) * | 2021-11-19 | 2024-01-05 | 深圳摩罗志远科技有限公司 | Headset amplifier circuit |
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Granted publication date: 20170905 Termination date: 20190119 |