CN203407000U - Voice output adjustment circuit and audio and video playing equipment - Google Patents
Voice output adjustment circuit and audio and video playing equipment Download PDFInfo
- Publication number
- CN203407000U CN203407000U CN201320507659.7U CN201320507659U CN203407000U CN 203407000 U CN203407000 U CN 203407000U CN 201320507659 U CN201320507659 U CN 201320507659U CN 203407000 U CN203407000 U CN 203407000U
- Authority
- CN
- China
- Prior art keywords
- oxide
- semiconductor
- metal
- signal
- resistance
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Stereophonic Arrangements (AREA)
Abstract
The utility model discloses a voice output adjustment circuit and a piece of audio and video playing equipment. The voice output adjustment circuit is connected with a main controller of the audio and video playing equipment and comprises an earphone terminal, a loudspeaker, an audio output end, a signal coupling module, a signal attenuation module and a switching control module. According to the voice output adjustment circuit of the utility model, when a control signal output by the main controller is in a high level, the switching control module cuts off a closed circuit through which an alternating voice signal is output to the loudspeaker; and when the control signal in a low level, the switching control module controls the alternating voice signal to be output to the loudspeaker so as to enable the alternating voice signal to be output both to the earphone terminal and the loudspeaker. Therefore, the earphone terminal is enabled to have both the function of an earphone and the function of AV OUT audio output, the compatibility and matching problems during realization of standardized components of a voice module of the audio and video playing equipment are solved, the production and maintenance costs of the standard components are reduced, and the voice output adjustment circuit and the audio and video playing equipment are easy to use.
Description
Technical field
The utility model relates to playing audio/video technical field, relates in particular to a kind of voice output Circuit tuning and playing audio/video.
Background technology
Consumer electronics product modularization, modularization are produced and sold has been reality, and this can maximize performance professional division, enhances productivity, and then reduces production costs.Typical product is as no exception in PC, television class product, is accelerating the way of promotional module and the integrated producing and selling of assembly.This just requires, the exploitation of the part classification of the close functional module of product, to be integrated into modular unit, as the power panel in television set, mainboard, types of functionality platelet etc.
The mainboard of television set of take is example, it often has the size of several standards, and concerning every single size, even the TV chip on mainboard, be SOC(System on Chip, SOC (system on a chip)) there is powerful function, also likely because the size of mainboard is inadequate, and have no idea to discharge the repertoire that abundant terminal is realized SOC, this just need to find out the terminal that can be shared by several functions from limited terminal the inside.With regard to the sound module by mainboard, if there is consumer to need ear-phone function, need on mainboard, increase earphone terminal, if there is consumer to need AV OUT audio output function, need on mainboard, increase AV OUT audio output, if but these two kinds of terminals of earphone terminal and AV OUT audio output all increase, the mainboard of television set does not just have enough space drainage earphone terminals and AV OUT audio output, makes troubles to use.Therefore, make the modular unit of mainboard sound module can compatible above-mentioned ear-phone function and two aspects of AV OUT audio output function, be a problem demanding prompt solution.
Utility model content
Main purpose of the present utility model is to propose a kind of voice output Circuit tuning and playing audio/video, be intended to solve the sound module of playing audio/video and realize compatibility and the matching problem that modular unit runs into, the production of debasing the standard assembly and maintenance cost.
In order to achieve the above object, the utility model proposes a kind of voice output Circuit tuning, this voice output Circuit tuning is connected with the master controller of playing audio/video, this voice output Circuit tuning comprises earphone terminal, loud speaker, for exporting the audio output of the voice signal after prime is processed and amplified, signal coupling module for the flip-flop output AC voice signal of voice signal described in filtering, for the signal attenuation module that described hum tone signal is decayed, and for controlling according to the control signal of described master controller output the switch control module whether described hum tone signal exports described loud speaker to,
The input of described signal coupling module is connected with described audio output, and the output of described signal coupling module is connected with the input of described signal attenuation module, and the output of described signal attenuation module is connected with described earphone terminal; The input of described switch control module is connected with the output of described signal coupling module, and the output of described switch control module is connected with described loud speaker, and the control end of described switch control module is connected with the control signal output of described master controller.
Preferably, described audio output comprises right audio channel output and L channel audio output, and described signal coupling module comprises the first coupling capacitance and the second coupling capacitance;
The positive pole of described the first coupling capacitance is connected with described right audio channel output, and the negative pole of described the first coupling capacitance is connected with the first input end of described switch control module, and is connected with the first input end of described signal attenuation module;
The positive pole of described the second coupling capacitance is connected with described L channel audio output, and the negative pole of described the second coupling capacitance is connected with the second input of described switch control module, and is connected with the second input of described signal attenuation module.
Preferably, described signal attenuation module comprises at least two damping resistances, described in one, damping resistance is connected between the negative pole and described earphone terminal of described the first coupling capacitance, and described in another, damping resistance is connected between the negative pole and described earphone terminal of described the second coupling capacitance.
Preferably, described signal attenuation module comprises the first damping resistance, the second damping resistance, the 3rd damping resistance and the 4th damping resistance;
One end of described the first damping resistance is connected with the negative pole of described the first coupling capacitance, and is connected with described earphone terminal, and the other end of described the first damping resistance is connected with described earphone terminal via described the second damping resistance;
One end of described the 3rd damping resistance is connected with the negative pole of described the second coupling capacitance, and is connected with described earphone terminal, and the other end of described the 3rd damping resistance is connected with described earphone terminal via described the 4th damping resistance.
Preferably, described loud speaker comprises right channel loudspeaker and left channel loudspeaker, and described switch control module comprises power input, the first metal-oxide-semiconductor, the second metal-oxide-semiconductor, the 3rd metal-oxide-semiconductor, the 4th metal-oxide-semiconductor, the first triode and the second triode;
The grid of described the first metal-oxide-semiconductor is connected with described power input, and be connected with the collector electrode of described the first triode, the drain electrode of described the first metal-oxide-semiconductor is connected with the negative pole of described the first coupling capacitance, and the source electrode of described the first metal-oxide-semiconductor is connected with the source electrode of described the second metal-oxide-semiconductor; The grid of described the second metal-oxide-semiconductor is connected with described power input, and be connected with the collector electrode of described the first triode, the drain electrode of described the second metal-oxide-semiconductor is connected with one end of described right channel loudspeaker, and is connected the other end ground connection of described right channel loudspeaker with described earphone terminal; The base stage of described the first triode is connected with the first input/output port of described master controller, the grounded emitter of described the first triode;
The grid of described the 3rd metal-oxide-semiconductor is connected with described power input, and be connected with the collector electrode of described the second triode, the drain electrode of described the 3rd metal-oxide-semiconductor is connected with the negative pole of described the second coupling capacitance, and the source electrode of described the 3rd metal-oxide-semiconductor is connected with the source electrode of described the 4th metal-oxide-semiconductor; The grid of described the 4th metal-oxide-semiconductor is connected with described power input, and be connected with the collector electrode of described the second triode, described the 4th drain electrode of metal-oxide-semiconductor and one end of described left channel loudspeaker are connected, and are connected the other end ground connection of described left channel loudspeaker with described earphone terminal; The base stage of described the second triode is connected with the second input/output port of described master controller, the grounded emitter of described the second triode.
Preferably, described switch control module also comprises the first resistance, the second resistance, the 3rd resistance and the 4th resistance;
One end of described the first resistance is connected with described power input, and the other end of described the first resistance is connected with the grid of described the second metal-oxide-semiconductor with the grid of described the first metal-oxide-semiconductor respectively; One end of described the second resistance is connected with the emitter of described the first triode, the other end ground connection of described the second resistance;
One end of described the 3rd resistance is connected with described power input, and the other end of described the 3rd resistance is connected with the grid of described the 4th metal-oxide-semiconductor with the grid of described the 3rd metal-oxide-semiconductor respectively; One end of described the 4th resistance is connected with the emitter of described the second triode, the other end ground connection of described the 4th resistance.
Preferably, described voice output Circuit tuning also comprises the filtration module for the high-frequency signal of voice signal described in filtering, and described filtration module comprises the first filter capacitor and the second filter capacitor;
One end of described the first filter capacitor is connected with the drain electrode of described the second metal-oxide-semiconductor, the other end ground connection of described the first filter capacitor; One end of described the second filter capacitor is connected with the drain electrode of described the 4th metal-oxide-semiconductor, the other end ground connection of described the second filter capacitor.
The utility model also proposes a kind of playing audio/video, this playing audio/video comprises master controller, also comprise voice output Circuit tuning, this voice output Circuit tuning is connected with the master controller of playing audio/video, this voice output Circuit tuning comprises earphone terminal, loud speaker, for exporting the audio output of the voice signal after prime is processed and amplified, signal coupling module for the flip-flop output AC voice signal of voice signal described in filtering, for the signal attenuation module that described hum tone signal is decayed, and for controlling according to the control signal of described master controller output the switch control module whether described hum tone signal exports described loud speaker to,
The input of described signal coupling module is connected with described audio output, and the output of described signal coupling module is connected with the input of described signal attenuation module, and the output of described signal attenuation module is connected with described earphone terminal; The input of described switch control module is connected with the output of described signal coupling module, and the output of described switch control module is connected with described loud speaker, and the control end of described switch control module is connected with the control signal output of described master controller.
The voice output Circuit tuning the utility model proposes, flip-flop by the filtering of signal coupling module from the voice signal of audio output output, and output AC voice signal, this hum tone signal exports earphone terminal to after the decay of signal attenuation module, by switch control module, according to the control signal of master controller output, control this hum tone signal simultaneously and whether export loud speaker to, when control signal is high level, by switch control module, cut off the path that hum tone signal exports loud speaker to, make hum tone signal only export earphone terminal to, realize ear-phone function, when control signal is low level, by switch control module, control hum tone signal and export loud speaker to, make hum tone signal can export earphone terminal to, can export loud speaker to again, realize ear-phone function AV OUT audio output function.Thereby make earphone terminal compatible with earphone function and AV OUT audio output function simultaneously, the sound module that has solved playing audio/video is realized compatibility and the matching problem that modular unit runs into, reduced production and the maintenance cost of modular unit, and easy to use.
Accompanying drawing explanation
Fig. 1 is the theory diagram of the utility model voice output Circuit tuning preferred embodiment;
Fig. 2 is the electrical block diagram of the utility model voice output Circuit tuning preferred embodiment.
The realization of the purpose of this utility model, functional characteristics and advantage, in connection with embodiment, and is described further with reference to accompanying drawing.
Embodiment
Below in conjunction with Figure of description and specific embodiment, further illustrate the technical solution of the utility model.Should be appreciated that specific embodiment described herein is only in order to explain the utility model, and be not used in restriction the utility model.
The utility model proposes a kind of voice output Circuit tuning.
With reference to Fig. 1, Fig. 1 is the theory diagram of the utility model voice output Circuit tuning 10 preferred embodiments.
In the utility model preferred embodiment, voice output Circuit tuning 10 is connected with the master controller 20 of playing audio/video, and this voice output Circuit tuning 10 comprises earphone terminal 11, loud speaker 12, audio output 13, signal coupling module 14, signal attenuation module 15 and switch control module 16.Audio output 13 is for exporting the voice signal after prime is processed and amplified, signal coupling module 14 is for the flip-flop output AC voice signal of filtering sound signal, signal attenuation module 15 is for hum tone signal is decayed, and whether switch control module 16 exports loud speaker 12 to for controlling hum tone signal according to the control signal of master controller 20 outputs.In the present embodiment, this playing audio/video can be television set, also can, for other equipment, this be restricted herein.
Wherein, the input of signal coupling module 14 is connected with audio output 13, and the output of signal coupling module 14 is connected with the input of signal attenuation module 15, and the output of signal attenuation module 15 is connected with earphone terminal 11; The input of switch control module 16 is connected with the output of signal coupling module 14, and the output of switch control module 16 is connected with loud speaker 12, and the control end of switch control module 16 is connected with the control signal output of master controller 20.
In the present embodiment, voice signal through prime processing and after amplifying exports signal coupling module 14 to from audio output 13, flip-flop in this voice signal of signal coupling module 14 filterings, and output AC voice signal, this hum tone signal exports earphone terminal 11 to after the decay of signal attenuation module 15.Simultaneously, switch control module 16 is controlled this hum tone signal according to the control signal of master controller 20 outputs and whether is exported loud speaker 12 to, in the present embodiment, when master controller 20 detects ear-phone function when using state, the control signal of master controller 20 outputs is high level, the control signal of this high level exports switch control module 16 to, control switch control module 16 is turn-offed, thereby switch control module 16 cuts off the path that this hum tone signal exports loud speaker 12 to, and this hum tone signal can only export earphone terminal 11 to; When master controller 20 detects AV OUT audio output function when using state, the control signal of master controller 20 outputs is low level, this low level control signal exports switch control module 16 to, 16 conductings of control switch control module, thereby switch control module 16 is controlled this hum tone signal and is exported loud speaker 12 to, this hum tone signal can export earphone terminal 11 to, can export loud speaker 12 to again.
Be equivalent to prior art, voice output Circuit tuning 10 of the present utility model, when the control signal of master controller 20 outputs is high level, by switch control module 16, cut off the path that hum tone signal exports loud speaker 12 to, make hum tone signal only export earphone terminal 11 to, realize ear-phone function; When the control signal of master controller 20 outputs is low level, by switch control module 16, control hum tone signal and export loud speaker 12 to, make hum tone signal can export earphone terminal 11 to, can export loud speaker 12 to again, realize ear-phone function AV OUT audio output function.Thereby make earphone terminal 11 compatible with earphone function and AV OUT audio output function simultaneously, the sound module that has solved playing audio/video is realized compatibility and the matching problem that modular unit runs into, reduced production and the maintenance cost of modular unit, and easy to use.
In the present embodiment, voice output Circuit tuning 10 also comprises filtration module 17, filtration module 17 is connected between switch control module 16 and loud speaker 12, during switch control module 16 conducting, in hum tone signal through switch control module 16 outputs, conventionally mix and have high-frequency signal, filtration module 17 convection current voice signals carry out High frequency filter processing, high-frequency signal in filtering sound signal, to remove high frequency noise, hum tone signal is arrived after loud speaker 12, the clear sound noiselessness that loud speaker 12 sends, reaches good audibility.
See figures.1.and.2 in the lump, wherein Fig. 2 is the electrical block diagram of the utility model voice output Circuit tuning 10 preferred embodiments.
In the utility model physical circuit shown in Fig. 2, audio output 13 comprises right audio channel output SR and L channel audio output SL, and signal coupling module 14 comprises the first coupling capacitance C1 and the second coupling capacitance C2.
The positive pole of the first coupling capacitance C1 is connected with right audio channel output SR, and the negative pole of the first coupling capacitance C1 is connected with the first input end of switch control module 16, and is connected with the first input end of signal attenuation module 15; The positive pole of the second coupling capacitance C2 is connected with L channel audio output SL, and the negative pole of the second coupling capacitance C2 is connected with the second input of switch control module 16, and is connected with the second input of signal attenuation module 15.
In the present embodiment, signal attenuation module 15 comprises at least two damping resistances, and a damping resistance is connected between the negative pole and earphone terminal 11 of the first coupling capacitance C1, and another damping resistance is connected between the negative pole and earphone terminal 11 of the second coupling capacitance C2.
Particularly, signal attenuation module 15 comprises the first damping resistance R5, the second damping resistance R6, the 3rd damping resistance R7 and the 4th damping resistance R8.
One end of the first damping resistance R5 is connected with the negative pole of the first coupling capacitance C1, and is connected with earphone terminal 11, and the other end of the first damping resistance R5 is connected with earphone terminal 11 via the second damping resistance R6; One end of the 3rd damping resistance R7 is connected with the negative pole of the second coupling capacitance C2, and is connected with earphone terminal 11, and the other end of the 3rd damping resistance R7 is connected with earphone terminal 11 via the 4th damping resistance R8.
In the present embodiment, by changing the resistance of the first damping resistance R5, the second damping resistance R6, the 3rd damping resistance R7 and the 4th damping resistance R8, can change the degree of hum tone signal decay, thereby by suitably choosing the resistance of the first damping resistance R5, the second damping resistance R6, the 3rd damping resistance R7 and the 4th damping resistance R8, the voltage that makes to output to the hum tone signal on earphone terminal 11 can meet the required voltage of use ear-phone function, can meet again and use the required voltage of AV OUT audio output function, to reach good audibility.From the voltage of earphone terminal 11 outputs, are for example 0.57～0.9V, from the voltage of AV OUT audio output output, be 0.2～0.8V, if make the utility model voice output Circuit tuning 10 meet above-mentioned two voltage spans from the voltage of earphone terminal 11 outputs simultaneously, the voltage of the hum tone signal after the first damping resistance R5, the second damping resistance R6, the 3rd damping resistance R7 and the 4th damping resistance R8 decay should be 0.57～0.8V.
In the present embodiment, loud speaker 12 comprises right channel loudspeaker R_SPE and left channel loudspeaker L_SPE, and switch control module 16 comprises power input VIN, the first metal-oxide-semiconductor M1, the second metal-oxide-semiconductor M2, the 3rd metal-oxide-semiconductor M3, the 4th metal-oxide-semiconductor M4, the first triode Q1 and the second triode Q2; In the present embodiment, the first metal-oxide-semiconductor M1, the second metal-oxide-semiconductor M2, the 3rd metal-oxide-semiconductor M3 and the 4th metal-oxide-semiconductor M4 are NMOS pipe, owing to exporting the hum tone signal of loud speaker 12 to, are AC signal, and there is parasitic diode between the drain electrode of metal-oxide-semiconductor and source electrode, therefore the first metal-oxide-semiconductor M1 and the second metal-oxide-semiconductor M2 are connected, the 3rd metal-oxide-semiconductor M3 and the 4th metal-oxide-semiconductor M4 are connected as the switch of controlling the output of hum tone signal, thereby eliminate the impact that parasitic diode is exported hum tone signal.
Wherein, the grid of the first metal-oxide-semiconductor M1 is connected with power input VIN, and is connected with the collector electrode of the first triode Q1, and the drain electrode of the first metal-oxide-semiconductor M1 is connected with the negative pole of the first coupling capacitance C1, and the source electrode of the first metal-oxide-semiconductor M1 is connected with the source electrode of the second metal-oxide-semiconductor M2; The grid of the second metal-oxide-semiconductor M2 is connected with power input VIN, and be connected with the collector electrode of the first triode Q1, the drain electrode of the second metal-oxide-semiconductor M2 is connected with one end of right channel loudspeaker R_SPE, and is connected with earphone terminal 11, the other end ground connection of right channel loudspeaker R_SPE; The base stage of the first triode Q1 is connected with the first input/output port IO1 of master controller 20, the grounded emitter of the first triode Q1.
The grid of the 3rd metal-oxide-semiconductor M3 is connected with power input VIN, and is connected with the collector electrode of the second triode Q2, and the drain electrode of the 3rd metal-oxide-semiconductor M3 is connected with the negative pole of the second coupling capacitance C2, and the source electrode of the 3rd metal-oxide-semiconductor M3 is connected with the source electrode of the 4th metal-oxide-semiconductor M4; The grid of the 4th metal-oxide-semiconductor M4 is connected with power input VIN, and be connected with the collector electrode of the second triode Q2, the drain electrode of the 4th metal-oxide-semiconductor M4 is connected with one end of left channel loudspeaker L_SPE, and is connected with earphone terminal 11, the other end ground connection of left channel loudspeaker L_SPE; The base stage of the second triode Q2 is connected with the second input/output port IO2 of master controller 20, the grounded emitter of the second triode Q2.
Particularly, switch control module 16 also comprises the first resistance R 1, the second resistance R 2, the 3rd resistance R 3 and the 4th resistance R 4.
One end of the first resistance R 1 is connected with power input VIN, and the other end of the first resistance R 1 is connected with the grid of the second metal-oxide-semiconductor M2 with the grid of the first metal-oxide-semiconductor M1 respectively; One end of the second resistance R 2 is connected with the emitter of the first triode Q1, the other end ground connection of the second resistance R 2; One end of the 3rd resistance R 3 is connected with power input VIN, and the other end of the 3rd resistance R 3 is connected with the grid of the 4th metal-oxide-semiconductor M4 with the grid of the 3rd metal-oxide-semiconductor M3 respectively; One end of the 4th resistance R 4 is connected with the emitter of the second triode Q2, the other end ground connection of the 4th resistance R 4.
In the present embodiment, filtration module 17 comprises the first filter capacitor C3 and the second filter capacitor C4.
One end of the first filter capacitor C3 is connected with the drain electrode of the second metal-oxide-semiconductor M2, the other end ground connection of the first filter capacitor C3; One end of the second filter capacitor C4 is connected with the drain electrode of the 4th metal-oxide-semiconductor M4, the other end ground connection of the second filter capacitor C4.
The operation principle of the utility model voice output Circuit tuning 10 specifically describes as follows:
Voice signal is after prime processing and amplifying, the voice signal of R channel exports the positive pole of the first coupling capacitance C1 to from right audio channel output SR, because the first coupling capacitance C1 has the function that hinders DC signal output, therefore the first coupling capacitance C1 can the flip-flop of filtering from the voice signal of right audio channel output SR output, alternating component in voice signal is intactly exported, thereby after the flip-flop in filtering sound signal, the voice signal of the first coupling capacitance C1 output is hum tone signal; In like manner the voice signal of L channel exports the positive pole of the second coupling capacitance C2 to from L channel audio output SL, the flip-flop of the second coupling capacitance C2 filtering from the voice signal of L channel audio output SL output, intactly exports the alternating component in voice signal.
The hum tone signal of exporting after the first coupling capacitance C1 filtering flip-flop is divided into two-way, decay through the first damping resistance R5 and the second damping resistance R6 in signal attenuation module 15 in one tunnel, after the energy of hum tone signal is suitably weakened, export earphone terminal 11 to, another road exports the drain electrode of the first metal-oxide-semiconductor M1 to.
The hum tone signal of exporting after the second coupling capacitance C2 filtering flip-flop is also divided into two-way, decay through the 3rd damping resistance R7 and the 4th damping resistance R8 in signal attenuation module 15 in one tunnel, after the energy of hum tone signal is suitably weakened, export earphone terminal 11 to, another road exports the drain electrode of the 3rd metal-oxide-semiconductor M3 to.
When master controller 20 detects ear-phone function when using state, master controller 20 is by the base stage that controls signal to the first triode Q1 of its first input/output port IO1 output high level, master controller 20 is exported the base stage that controls signal to the second triode Q2 of high level by its second input/output port IO2 simultaneously, thus the first triode Q1 and the second triode Q2 conducting.The grid of the first metal-oxide-semiconductor M1 now, the grid of the second metal-oxide-semiconductor M2, the grid of the grid of the 3rd metal-oxide-semiconductor M3 and the 4th metal-oxide-semiconductor M4 is equivalent to receive ground through the second resistance R 2, the i.e. grid of the first metal-oxide-semiconductor M1, the grid of the second metal-oxide-semiconductor M2, the grid of the grid of the 3rd metal-oxide-semiconductor M3 and the 4th metal-oxide-semiconductor M4 is low level, thereby the first metal-oxide-semiconductor M1, the second metal-oxide-semiconductor M2, the 3rd metal-oxide-semiconductor M3 and the 4th metal-oxide-semiconductor M4 all end, the hum tone signal of exporting after the first coupling capacitance C1 and the second coupling capacitance C2 filtering flip-flop can not export loud speaker 12 to, therefore this hum tone signal can only export earphone terminal 11 to, now earphone terminal 11 is done ear-phone function use.
When master controller 20 detects AV OUT audio output function when using state, the control signal that master controller 20 exports to by its first input/output port IO1 in the base stage of the first triode Q1 is low level, simultaneously by its second input/output port IO2, to export the control signal in the base stage of the second triode Q2 to be also low level to master controller 20, thus the first triode Q1 and the second triode Q2 cut-off.Now from the voltage (as 12V) of power input VIN input, via the first resistance R 1, export respectively the grid of the first metal-oxide-semiconductor M1 and the grid of the second metal-oxide-semiconductor M2 to, and export respectively the grid of the 3rd metal-oxide-semiconductor M3 and the grid of the 4th metal-oxide-semiconductor M4 to via the 3rd resistance R 3, the grid of the first metal-oxide-semiconductor M1, the grid of the second metal-oxide-semiconductor M2, the grid of the grid of the 3rd metal-oxide-semiconductor M3 and the 4th metal-oxide-semiconductor M4 is high level, thereby the first metal-oxide-semiconductor M1, the second metal-oxide-semiconductor M2, the 3rd metal-oxide-semiconductor M3 and the equal conducting of the 4th metal-oxide-semiconductor M4, the hum tone signal of exporting after the first coupling capacitance C1 filtering flip-flop is carried out High frequency filter processing through the first filter capacitor C3, high-frequency signal in this hum tone signal of filtering, after removing high frequency noise, export right channel loudspeaker R_SPE to, the hum tone signal of exporting after the second coupling capacitance C2 filtering flip-flop is carried out High frequency filter processing through the second filter capacitor C4, after removing high frequency noise, export left channel loudspeaker L_SPE to, therefore this hum tone signal can export earphone terminal 11 to, can export loud speaker 12 to again.Now earphone terminal 11 can be realized AV OUT audio output function.
The utility model also proposes a kind of playing audio/video, this playing audio/video comprises voice output Circuit tuning 10 and master controller 20, the structure of this voice output Circuit tuning 10, operation principle and the beneficial effect that brings, all with reference to above-described embodiment, repeat no more herein.Wherein, this playing audio/video can be television set, also can, for other equipment, this be restricted herein.
The foregoing is only preferred embodiment of the present utility model; not thereby limit the scope of the claims of the present utility model; every equivalent structure or conversion of equivalent flow process that utilizes the utility model specification and accompanying drawing content to do; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present utility model.
Claims (8)
1. a voice output Circuit tuning, be connected with the master controller of playing audio/video, it is characterized in that, comprise earphone terminal, loud speaker, for exporting the audio output of the voice signal after prime is processed and amplified, the signal coupling module for the flip-flop output AC voice signal of voice signal described in filtering, the signal attenuation module for described hum tone signal is decayed, and for controlling according to the control signal of described master controller output the switch control module whether described hum tone signal exports described loud speaker to;
The input of described signal coupling module is connected with described audio output, and the output of described signal coupling module is connected with the input of described signal attenuation module, and the output of described signal attenuation module is connected with described earphone terminal; The input of described switch control module is connected with the output of described signal coupling module, and the output of described switch control module is connected with described loud speaker, and the control end of described switch control module is connected with the control signal output of described master controller.
2. voice output Circuit tuning as claimed in claim 1, is characterized in that, described audio output comprises right audio channel output and L channel audio output, and described signal coupling module comprises the first coupling capacitance and the second coupling capacitance;
The positive pole of described the first coupling capacitance is connected with described right audio channel output, and the negative pole of described the first coupling capacitance is connected with the first input end of described switch control module, and is connected with the first input end of described signal attenuation module;
The positive pole of described the second coupling capacitance is connected with described L channel audio output, and the negative pole of described the second coupling capacitance is connected with the second input of described switch control module, and is connected with the second input of described signal attenuation module.
3. voice output Circuit tuning as claimed in claim 2, it is characterized in that, described signal attenuation module comprises at least two damping resistances, described in one, damping resistance is connected between the negative pole and described earphone terminal of described the first coupling capacitance, and described in another, damping resistance is connected between the negative pole and described earphone terminal of described the second coupling capacitance.
4. voice output Circuit tuning as claimed in claim 3, is characterized in that, described signal attenuation module comprises the first damping resistance, the second damping resistance, the 3rd damping resistance and the 4th damping resistance;
One end of described the first damping resistance is connected with the negative pole of described the first coupling capacitance, and is connected with described earphone terminal, and the other end of described the first damping resistance is connected with described earphone terminal via described the second damping resistance;
One end of described the 3rd damping resistance is connected with the negative pole of described the second coupling capacitance, and is connected with described earphone terminal, and the other end of described the 3rd damping resistance is connected with described earphone terminal via described the 4th damping resistance.
5. the voice output Circuit tuning as described in any one in claim 2 to 4, it is characterized in that, described loud speaker comprises right channel loudspeaker and left channel loudspeaker, and described switch control module comprises power input, the first metal-oxide-semiconductor, the second metal-oxide-semiconductor, the 3rd metal-oxide-semiconductor, the 4th metal-oxide-semiconductor, the first triode and the second triode;
The grid of described the first metal-oxide-semiconductor is connected with described power input, and be connected with the collector electrode of described the first triode, the drain electrode of described the first metal-oxide-semiconductor is connected with the negative pole of described the first coupling capacitance, and the source electrode of described the first metal-oxide-semiconductor is connected with the source electrode of described the second metal-oxide-semiconductor; The grid of described the second metal-oxide-semiconductor is connected with described power input, and be connected with the collector electrode of described the first triode, the drain electrode of described the second metal-oxide-semiconductor is connected with one end of described right channel loudspeaker, and is connected the other end ground connection of described right channel loudspeaker with described earphone terminal; The base stage of described the first triode is connected with the first input/output port of described master controller, the grounded emitter of described the first triode;
The grid of described the 3rd metal-oxide-semiconductor is connected with described power input, and be connected with the collector electrode of described the second triode, the drain electrode of described the 3rd metal-oxide-semiconductor is connected with the negative pole of described the second coupling capacitance, and the source electrode of described the 3rd metal-oxide-semiconductor is connected with the source electrode of described the 4th metal-oxide-semiconductor; The grid of described the 4th metal-oxide-semiconductor is connected with described power input, and be connected with the collector electrode of described the second triode, described the 4th drain electrode of metal-oxide-semiconductor and one end of described left channel loudspeaker are connected, and are connected the other end ground connection of described left channel loudspeaker with described earphone terminal; The base stage of described the second triode is connected with the second input/output port of described master controller, the grounded emitter of described the second triode.
6. voice output Circuit tuning as claimed in claim 5, is characterized in that, described switch control module also comprises the first resistance, the second resistance, the 3rd resistance and the 4th resistance;
One end of described the first resistance is connected with described power input, and the other end of described the first resistance is connected with the grid of described the second metal-oxide-semiconductor with the grid of described the first metal-oxide-semiconductor respectively; One end of described the second resistance is connected with the emitter of described the first triode, the other end ground connection of described the second resistance;
One end of described the 3rd resistance is connected with described power input, and the other end of described the 3rd resistance is connected with the grid of described the 4th metal-oxide-semiconductor with the grid of described the 3rd metal-oxide-semiconductor respectively; One end of described the 4th resistance is connected with the emitter of described the second triode, the other end ground connection of described the 4th resistance.
7. voice output Circuit tuning as claimed in claim 6, it is characterized in that, described voice output Circuit tuning also comprises the filtration module for the high-frequency signal of voice signal described in filtering, and described filtration module comprises the first filter capacitor and the second filter capacitor;
One end of described the first filter capacitor is connected with the drain electrode of described the second metal-oxide-semiconductor, the other end ground connection of described the first filter capacitor; One end of described the second filter capacitor is connected with the drain electrode of described the 4th metal-oxide-semiconductor, the other end ground connection of described the second filter capacitor.
8. a playing audio/video, comprises master controller, it is characterized in that, also comprises the voice output Circuit tuning described in any one in claim 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320507659.7U CN203407000U (en) | 2013-08-19 | 2013-08-19 | Voice output adjustment circuit and audio and video playing equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320507659.7U CN203407000U (en) | 2013-08-19 | 2013-08-19 | Voice output adjustment circuit and audio and video playing equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203407000U true CN203407000U (en) | 2014-01-22 |
Family
ID=49942918
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320507659.7U Expired - Fee Related CN203407000U (en) | 2013-08-19 | 2013-08-19 | Voice output adjustment circuit and audio and video playing equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203407000U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106454677A (en) * | 2016-10-09 | 2017-02-22 | 青岛海信电器股份有限公司 | Signal circuit control method and display device |
| CN107864422A (en) * | 2017-09-26 | 2018-03-30 | 捷开通讯(深圳)有限公司 | Playback equipment and the player method based on playback equipment |
| CN109089185A (en) * | 2018-07-27 | 2018-12-25 | 成都信息工程大学 | A kind of intelligent earphone |
| CN112511955A (en) * | 2020-10-27 | 2021-03-16 | 广州视源电子科技股份有限公司 | Extended use method and device of AV OUT interface, computer equipment and storage medium |
-
2013
- 2013-08-19 CN CN201320507659.7U patent/CN203407000U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106454677A (en) * | 2016-10-09 | 2017-02-22 | 青岛海信电器股份有限公司 | Signal circuit control method and display device |
| CN107864422A (en) * | 2017-09-26 | 2018-03-30 | 捷开通讯(深圳)有限公司 | Playback equipment and the player method based on playback equipment |
| WO2019062717A1 (en) * | 2017-09-26 | 2019-04-04 | 惠州Tcl移动通信有限公司 | Playback device, and plaback method based on playback device |
| US11166103B2 (en) | 2017-09-26 | 2021-11-02 | Huizhou Tcl Mobile Communication Co., Ltd. | Playing device and playing method based on playing device |
| CN109089185A (en) * | 2018-07-27 | 2018-12-25 | 成都信息工程大学 | A kind of intelligent earphone |
| CN112511955A (en) * | 2020-10-27 | 2021-03-16 | 广州视源电子科技股份有限公司 | Extended use method and device of AV OUT interface, computer equipment and storage medium |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204090123U (en) | Audio output control circuit and audio-frequence player device | |
| CN203407000U (en) | Voice output adjustment circuit and audio and video playing equipment | |
| CN203537555U (en) | Audio device | |
| CN204190934U (en) | The voicefrequency circuit that a kind of power output is adjustable on a large scale and acoustic product | |
| CN105338446B (en) | Audio track control circuit | |
| CN102769729A (en) | Television and audio external play control circuit thereof | |
| CN115720318A (en) | Automatic noise reduction circuit for sound equipment and control method | |
| CN102118668B (en) | Loudspeaker system and loudspeaker driving circuit | |
| CN103888874A (en) | Audio input and output device and audio input and output method | |
| CN205793154U (en) | Earphone drive circuit and electronic equipment | |
| CN2845358Y (en) | Sound controlling circuit and TV set therewith | |
| CN202889542U (en) | Set top box with audio output function | |
| CN203523011U (en) | Audio configuration device and TV audio system | |
| CN202496002U (en) | Audio signal outputting and processing circuit and television | |
| CN204537577U (en) | Based on the Experiment of Electronic Technology platform of sound amplifier | |
| CN203734823U (en) | Audio device | |
| CN106375690A (en) | Pop sound elimination circuit | |
| CN1273456A (en) | Digitalized efficient 1-bit power amplifier | |
| CN102546895B (en) | Mobile phone and audio processing circuit thereof | |
| CN201533288U (en) | On-off mute circuit and digital television receiver with same | |
| CN205232334U (en) | Audio frequency noise suicide circuit and audio -visual equipment | |
| CN214281585U (en) | Control circuit structure of strip-shaped sound box | |
| CN2702557Y (en) | Accompanying sound processing circuit for picture in picture television | |
| CN203596866U (en) | Audio transmission circuit and TV set | |
| CN2859965Y (en) | Audio commutation circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140122 Termination date: 20170819 |