CN204090123U - Audio output control circuit and audio-frequence player device - Google Patents
Audio output control circuit and audio-frequence player device Download PDFInfo
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- CN204090123U CN204090123U CN201420317078.1U CN201420317078U CN204090123U CN 204090123 U CN204090123 U CN 204090123U CN 201420317078 U CN201420317078 U CN 201420317078U CN 204090123 U CN204090123 U CN 204090123U
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Abstract
The utility model discloses a kind of audio output control circuit, this audio output control circuit comprise earphone socket, loud speaker, for export according to the connection status of earphone socket and earphone corresponding detection signals headset detection module, for export according to described detection signal the first audio signal or the second audio signal main control module, for exporting to loud speaker after described first audio signal being amplified or exporting to the audio frequency power amplifier module of earphone after described second audio signal being amplified.The invention also discloses a kind of audio-frequence player device, this audio-frequence player device comprises audio output control circuit.The utility model can improve the sounding effect of loud speaker and earphone, improves audio frequency output performance and the Consumer's Experience of audio-frequence player device.And, when realizing loud speaker and being different with earphone when sounding, the cost of audio output control circuit can be reduced.
Description
Technical field
The utility model relates to technical field of electronic equipment, particularly relates to a kind of audio output control circuit and audio-frequence player device.
Background technology
At present, most audio-frequence player device is as equipment such as television set, laptop computer, panel computer, mobile phones, both the interface driving loud speaker had been needed, need headset output interface again, the most general implementation has two drive circuits (i.e. power of loudspeaker amplifying circuit and earphone power amplification circuit) at device interior, drive loud speaker and earphone respectively, this scheme is due to needs two independently drive circuit, and cost is higher.Although have at present the scheme that loud speaker and earphone share a drive circuit, realize loud speaker different with earphone time sounding function, but do not have earphone to insert measuring ability in this scheme, whether audio-frequence player device can not differentiate headset output interface has earphone to insert, so same audio signal can only be passed to loud speaker and earphone by the governor circuit of audio-frequence player device, and the Frequency Response of loud speaker and earphone, the power output required, the sound effect parameters such as volume are different, therefore this scheme can not take into account the audio frequency output of earphone and boombox, greatly have impact on the audio frequency output performance of audio-frequence player device, reduce Consumer's Experience.
Utility model content
Main purpose of the present utility model is the cost being to reduce audio output control circuit, improves the audio frequency output performance of audio-frequence player device.
In order to achieve the above object, the utility model provides a kind of audio output control circuit, this audio output control circuit comprise earphone socket, loud speaker, for export according to the connection status of earphone socket and earphone corresponding detection signals headset detection module, for export according to described detection signal the first audio signal or the second audio signal main control module, for exporting to loud speaker after described first audio signal being amplified or exporting to the audio frequency power amplifier module of earphone after described second audio signal being amplified;
The input of described audio frequency power amplifier module is connected with the audio signal output end of described main control module, the output of described audio frequency power amplifier module is connected with described earphone socket, and the output of described audio frequency power amplifier module is connected with the input of described headset detection module and described loud speaker respectively by described earphone socket, the output of described headset detection module is connected with the test side of described main control module.
Preferably, the output of described audio frequency power amplifier module comprises right audio channel output and left audio output, described loud speaker comprises right channel loudspeaker and left channel loudspeaker, and the input of described headset detection module comprises the first detection input and second and detects input;
Described earphone socket comprises the first pin, the second pin, the 3rd pin, the 4th pin, the 5th pin, the 6th pin and the 7th pin; When the non-frames connecting with headphone of described earphone socket, described 6th pin and the electrical connection of the 7th pin, and the second pin and the electrical connection of the 3rd pin; When described earphone socket frames connecting with headphone, described 6th pin and the 7th pin disconnect, and the second pin and the 3rd pin disconnect; Described first pin ground connection, described 5th pin is all connected with described right audio channel output with the 6th pin, described 7th pin is connected with described right channel loudspeaker, and detect input with first of described headset detection module and be connected, described second pin is all connected with described left audio output with the 4th pin, described 3rd pin is connected with described left channel loudspeaker, and detects input with second of described headset detection module and be connected.
Preferably, described audio frequency power amplifier module comprises power amplification circuit, the first resistance and the second resistance, and described power amplification circuit comprises right audio channel positive output end and left audio positive output end; Described right audio channel positive output end is the right audio channel output of described audio frequency power amplifier module, and described left audio positive output end is the left audio output of described audio frequency power amplifier module;
Described right audio channel positive output end is connected with the 6th pin of described earphone socket, and is connected with the 5th pin of described earphone socket via described first resistance; Described left audio positive output end is connected with the second pin of described earphone socket, and is connected with the 4th pin of described earphone socket via described second resistance;
7th pin of described earphone socket is connected with the anode of described right channel loudspeaker, and detects input with first of described headset detection module and be connected, the negativing ending grounding of described right channel loudspeaker; 3rd pin of described earphone socket is connected with the anode of described left channel loudspeaker, and detects input with second of described headset detection module and be connected, the negativing ending grounding of described left channel loudspeaker.
Preferably, described audio frequency power amplifier module also comprises the first electric capacity, the second electric capacity, the 3rd electric capacity and the 4th electric capacity;
One end of described first electric capacity is connected with described right audio channel positive output end, and the other end of described first electric capacity is connected with the 5th pin of described earphone socket via described first resistance; One end of described second electric capacity is connected with described left audio positive output end, and the other end of described second electric capacity is connected with the 4th pin of described earphone socket via described second resistance;
One end of described 3rd electric capacity is connected with the 7th pin of described earphone socket, and the other end of described 3rd electric capacity is connected with the anode of described right channel loudspeaker; One end of described 4th electric capacity is connected with the 3rd pin of described earphone socket, and the other end of described 4th electric capacity is connected with the anode of described left channel loudspeaker.
Preferably, described audio frequency power amplifier module comprises power amplification circuit, the first resistance and the second resistance, and described power amplification circuit comprises right audio channel positive output end, right audio channel negative output terminal, left audio positive output end and left audio negative output terminal; Described right audio channel positive output end is the right audio channel output of described audio frequency power amplifier module, and described left audio positive output end is the left audio output of described audio frequency power amplifier module;
Described right audio channel positive output end is connected with the 6th pin of described earphone socket, and is connected with the 5th pin of described earphone socket via described first resistance; Described left audio positive output end is connected with the second pin of described earphone socket, and is connected with the 4th pin of described earphone socket via described second resistance;
7th pin of described earphone socket is connected with the anode of described right channel loudspeaker, and detects input with first of described headset detection module and be connected, and the negative terminal of described right channel loudspeaker is connected with described right audio channel negative output terminal; 3rd pin of described earphone socket is connected with the anode of described left channel loudspeaker, and detects input with second of described headset detection module and be connected, and the negative terminal of described left channel loudspeaker is connected with described left audio negative output terminal.
Preferably, described audio frequency power amplifier module also comprises the first electric capacity, the second electric capacity, the 3rd electric capacity and the 4th electric capacity;
One end of described first electric capacity is connected with described right audio channel positive output end, and the other end of described first electric capacity is connected with the 5th pin of described earphone socket via described first resistance; One end of described second electric capacity is connected with described left audio positive output end, and the other end of described second electric capacity is connected with the 4th pin of described earphone socket via described second resistance;
One end of described 3rd electric capacity is connected with the negative terminal of described right channel loudspeaker, and the described other end of the 3rd electric capacity is connected with the right audio channel negative output terminal of power amplification circuit; One end of described 4th electric capacity is connected with the negative terminal of described left channel loudspeaker, and the described other end of the 4th electric capacity is connected with the left audio negative output terminal of power amplification circuit.
Preferably, described headset detection module comprises the 3rd resistance, the 4th resistance, the 5th resistance and the 5th electric capacity;
One end of described 3rd resistance is connected with the test side of described main control module, and be connected with the 7th pin of described earphone socket via described 4th resistance, also be connected with the 3rd pin of described earphone socket via described 5th resistance, the other end ground connection of described 3rd resistance; Described 5th electric capacity and described 3rd resistor coupled in parallel.
Preferably, described headset detection module comprises the 3rd resistance, the 4th resistance and the 5th electric capacity;
One end of described 3rd resistance is connected with the test side of described main control module, and be connected with the 7th pin of described earphone socket via described 4th resistance, one end of described 3rd resistance is also connected with the 3rd pin of described earphone socket, the other end ground connection of described 3rd resistance; Described 5th electric capacity and described 3rd resistor coupled in parallel.
Preferably, described headset detection module comprises the 3rd resistance, the 4th resistance and the 5th electric capacity;
One end of described 3rd resistance is connected with the test side of described main control module, and is connected with the 7th pin of described earphone socket, is also connected with the 3rd pin of described earphone socket via described 4th resistance, the other end ground connection of described 3rd resistance; Described 5th electric capacity and described 3rd resistor coupled in parallel.
In addition, in order to achieve the above object, the utility model also provides a kind of audio-frequence player device, this audio-frequence player device comprises audio output control circuit, this audio output control circuit comprises earphone socket, loud speaker, for exporting the headset detection module of corresponding detection signals according to the connection status of earphone socket and earphone, for exporting the main control module of the first audio signal or the second audio signal according to described detection signal, export to loud speaker or the audio frequency power amplifier module of earphone will be exported to after described second audio signal amplification after described first audio signal is amplified,
The input of described audio frequency power amplifier module is connected with the audio signal output end of described main control module, the output of described audio frequency power amplifier module is connected with described earphone socket, and the output of described audio frequency power amplifier module is connected with the input of described headset detection module and described loud speaker respectively by described earphone socket, the output of described headset detection module is connected with the test side of described main control module.
The audio output control circuit that the utility model provides, by the connection status of headset detection module Test earphone socket and earphone, when headset detection module detects the non-frames connecting with headphone of earphone socket, main control module exports the first audio signal (sound effect parameters that this first audio signal meets loud speaker is arranged) to audio frequency power amplifier module, to drive loud speaker; When headset detection module detects earphone socket frames connecting with headphone, main control module exports with the second audio signal (sound effect parameters that this second audio signal meets earphone is arranged) to audio frequency power amplifier module, to drive earphone.Thus according to the connection status of earphone socket and earphone, main control module exports the audio signal being applicable to loud speaker or earphone and drives loud speaker or earphone, improve the sounding effect of loud speaker and earphone, thus improve the audio frequency output performance of audio-frequence player device, also improve Consumer's Experience.And, only need an audio frequency power amplifier module to drive loud speaker, can earphone be driven again, thus when sounding, the cost of audio output control circuit can be reduced when realizing loud speaker and being different with earphone.
Accompanying drawing explanation
Fig. 1 is the theory diagram of the utility model audio output control circuit preferred embodiment;
Fig. 2 is the electrical block diagram of the utility model audio output control circuit one embodiment;
Fig. 3 is the electrical block diagram of another embodiment of the utility model audio output control circuit.
The realization of the purpose of this utility model, functional characteristics and advantage, will in conjunction with the embodiments, and be described further with reference to accompanying drawing.
Embodiment
Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.
The utility model provides a kind of audio output control circuit.
With reference to the theory diagram that Fig. 1, Fig. 1 are the preferred embodiment of the utility model audio output control circuit.
In the utility model preferred embodiment, audio output control circuit comprises main control module 10, audio frequency power amplifier module 20, earphone socket 30, loud speaker 40 and headset detection module 50.Headset detection module 50 exports corresponding detection signals for Test earphone socket 30 and the connection status of earphone (not shown), main control module 10 exports the first audio signal or the second audio signal for the detection signal exported according to headset detection module 50, and audio frequency power amplifier module 20 is exported to loud speaker or exported to earphone after the second audio signal being amplified after the first audio signal being amplified.
Wherein, the input of audio frequency power amplifier module 20 is connected with the audio signal output end of main control module 10, the output of audio frequency power amplifier module 20 is connected with earphone socket 30, and the output of audio frequency power amplifier module 20 is connected with the input of headset detection module 50 and loud speaker 40 respectively by earphone socket 30, the output of headset detection module 50 is connected with the test side of main control module 10.
In the present embodiment, earphone socket 30 is used for connecting outside earphone, the connection status of headset detection module 50 Test earphone socket 30 and earphone, when headset detection module 50 detects earphone socket 30 non-frames connecting with headphone, headset detection module 50 exports the detection signal of high level to main control module 10, main control module 10 exports the first audio signal to audio frequency power amplifier module 20 according to the high level detection signal received, the sound effect parameters that the first audio signal that main control module 10 exports meets loud speaker 40 is arranged, this sound effect parameters arranges the Frequency Response comprising loud speaker 40, the power output required, volume etc., the first audio signal that main control module 10 exports by audio frequency power amplifier module 20 exports to loud speaker 40 through earphone socket 30 after amplifying, now, the first audio signal after audio frequency power amplifier module 20 is amplified only outputs to loud speaker 40, only has loud speaker 40 sounding, when headset detection module 50 detects earphone socket 30 frames connecting with headphone, the detection signal of headset detection module 50 output low level is to main control module 10, main control module 10 exports the second audio signal to audio frequency power amplifier module 20 according to the low level detection signal received, the sound effect parameters that the second audio signal that main control module 10 exports meets earphone is arranged, this sound effect parameters arranges the Frequency Response comprising earphone, the power output required, volume etc., the second audio signal that main control module 10 exports by audio frequency power amplifier module 20 exports to earphone by earphone socket 30 after amplifying, now, the second audio signal after audio frequency power amplifier module 20 is amplified only outputs to earphone, only has earphone sounding.
The audio output control circuit that the utility model provides, by the connection status of headset detection module 50 Test earphone socket 30 with earphone, main control module 10 is according to the connection status of earphone socket 30 with earphone, export the audio signal being applicable to loud speaker 40 or earphone and drive loud speaker 40 or earphone, improve the sounding effect of loud speaker 40 and earphone, thus improve the audio frequency output performance of audio-frequence player device, also improve Consumer's Experience.And Zhi Xu mono-tunnel audio frequency power amplifier module 20 can drive loud speaker 40, can drive earphone again, thus when sounding, the cost of audio output control circuit can be reduced when realizing loud speaker 40 and being different with earphone.
In conjunction with seeing figures.1.and.2, wherein Fig. 2 is the electrical block diagram of the utility model audio output control circuit one embodiment.
As shown in Figure 2, the output of audio frequency power amplifier module 20 comprises right audio channel output and left audio output, loud speaker 40 comprises right channel loudspeaker 401 and left channel loudspeaker 402, and the input of headset detection module 50 comprises the first detection input and second and detects input.
Earphone socket 30 comprises the first pin P1, the second pin P2, the 3rd pin P3, the 4th pin P4, the 5th pin P5, the 6th pin P6 and the 7th pin P7; When earphone socket 30 non-frames connecting with headphone, the 6th pin P6 and the 7th pin P7 is electrically connected, and the second pin P2 and the 3rd pin P3 is electrically connected; When earphone socket 30 frames connecting with headphone, the 6th pin P6 and the 7th pin P7 disconnects, and the second pin P2 and the 3rd pin P3 disconnects; In Fig. 2, first pin P1 ground connection, 5th pin P5 is all connected with the right audio channel output of audio frequency power amplifier module 20 with the 6th pin P6,7th pin P7 is connected with right channel loudspeaker 401, and detect input with first of headset detection module 50 and be connected, second pin P2 is all connected with the left audio output of audio frequency power amplifier module 20 with the 4th pin P4, and the 3rd pin P3 is connected with left channel loudspeaker 402, and detects input with second of headset detection module 50 and be connected.
In the embodiment of a distortion, the annexation of the 6th pin P6, the 7th pin P7 and audio frequency power amplifier module 20, loud speaker 40 and headset detection module 50 can be exchanged, namely the 6th pin P6 detects input with first of headset detection module 50 and right channel loudspeaker 401 is connected respectively, and the 7th pin P7 is connected with the right audio channel output of audio frequency power amplifier module 20; In like manner, the annexation of the second pin P2, the 3rd pin P3 and audio frequency power amplifier module 20, loud speaker 40 and headset detection module 50 also can be exchanged, namely the second pin P2 detects input with second of headset detection module 50 and left channel loudspeaker 402 is connected respectively, and the 3rd pin P3 is connected with the left audio output of audio frequency power amplifier module 20.
Particularly, in Fig. 2, audio frequency power amplifier module 20 comprises power amplification circuit 201, first resistance R1 and the second resistance R2, and power amplification circuit 201 comprises right audio channel positive output end R+ and left audio positive output end L+; Right audio channel positive output end R+ is the right audio channel output of audio frequency power amplifier module 20, and left audio positive output end L+ is the left audio output of audio frequency power amplifier module 20.
Wherein, right audio channel positive output end R+ is connected with the 6th pin P6 of earphone socket 30, and is connected with the 5th pin P5 of earphone socket 30 via the first resistance R1; Left audio positive output end L+ is connected with the second pin P2 of earphone socket 30, and is connected with the 4th pin P4 of earphone socket 30 via the second resistance R2.
7th pin P7 of earphone socket 30 is connected with the anode of right channel loudspeaker 401, and detects input with first of headset detection module 50 and be connected, the negativing ending grounding of right channel loudspeaker 401; 3rd pin P3 of earphone socket 30 is connected with the anode of left channel loudspeaker 402, and detects input with second of headset detection module 50 and be connected, the negativing ending grounding of left channel loudspeaker 402.
In the present embodiment, when the output packet of power amplification circuit is containing DC component, audio frequency power amplifier module 20 also comprises the first electric capacity C1, the second electric capacity C2, the 3rd electric capacity C3 and the 4th electric capacity C4 further.
One end of first electric capacity C1 is connected with right audio channel positive output end R+, and the other end of the first electric capacity C1 is connected with the 5th pin P5 of earphone socket 30 via the first resistance R1; One end of second electric capacity C2 is connected with left audio positive output end L+, and the other end of the second electric capacity C2 is connected with the 4th pin P4 of earphone socket 30 via the second resistance R2.
One end of 3rd electric capacity C3 is connected with the 7th pin P7 of earphone socket 30, and the other end of the 3rd electric capacity C3 is connected with the anode of right channel loudspeaker 401; One end of 4th electric capacity C4 is connected with the 3rd pin P3 of earphone socket 30, and the other end of the 4th electric capacity C4 is connected with the anode of left channel loudspeaker 402.
First electric capacity C1, the second electric capacity C2, the 3rd electric capacity C3 and the 4th electric capacity C4 are as capacitance, and for the DC component in the audio signal that filtering power amplification circuit 201 exports, the audio signal guaranteeing to export to loud speaker 40 or earphone is pure AC signal.
Particularly, in Fig. 2, headset detection module 50 comprises the 3rd resistance R3, the 4th resistance R4, the 5th resistance R5 and the 5th electric capacity C5.
One end of 3rd resistance R3 is connected with the test side DET of main control module 10, and is connected with the 7th pin P7 of earphone socket 30 via the 4th resistance R4, is also connected with the 3rd pin P3 of earphone socket 30 via the 5th resistance R5, the other end ground connection of the 3rd resistance R3; 5th electric capacity C5 is in parallel with the 3rd resistance R3.
In the embodiment of a distortion, headset detection module 50 only can comprise the 3rd resistance R3, 4th resistance R4 and the 5th electric capacity C5, namely in fig. 2, 3rd pin P3 of earphone socket 30 directly connects the 3rd resistance R3, the 5th resistance R5 is not met between 3rd pin P3 of earphone socket 30 and the 3rd resistance R3, or headset detection module 50 only can comprise the 3rd resistance R3, 5th resistance R5 and the 5th electric capacity C5, namely in fig. 2, 7th pin P7 of earphone socket 30 directly connects the 3rd resistance R3, the 4th resistance R4 is not met between 7th pin P7 of earphone socket 30 and the 3rd resistance R3.
In audio output control circuit as shown in Figure 2, power amplification circuit 201 exports the audio signal of R channel and L channel with single ended mode, and the audio output control circuit operation principle shown in Fig. 2 specifically describes as follows:
When not having earphone plugged earphone socket 30, the 6th pin P6 and the 7th pin P7 of earphone socket 30 are electrically connected, and the second pin P2 and the 3rd pin P3 of earphone socket 30 are electrically connected.The audio signal exported from the right audio channel positive output end R+ of power amplification circuit 201 outputs to the 6th pin P6 of earphone socket 30, output to the 7th pin P7 of earphone socket 30 again, then output to the anode of right channel loudspeaker 401 by the 7th pin P7 of earphone socket 30.The audio signal exported from the left audio positive output end L+ of power amplification circuit 201 outputs to the second pin P2 of earphone socket 30, output to the 3rd pin P3 of earphone socket 30 again, then output to the anode of left channel loudspeaker 402 by the 3rd pin P3 of earphone socket 30.
Simultaneously, the 3rd resistance R3 in headset detection module 50 and the 4th resistance R4 samples to the voltage signal on the 7th pin P7 of earphone socket 30, 3rd resistance R3 and the 5th resistance R5 samples to the voltage signal on the 3rd pin P3 of earphone socket 30, the test side DET of main control module 10 is made to receive a high level, main control module 10 exports the first audio signal (sound effect parameters that this first audio signal meets loud speaker 40 is arranged) to power amplification circuit 201, the first audio signal that main control module 10 exports by power amplification circuit 201 is amplified, and the first audio signal after amplifying is exported from the right audio channel positive output end R+ of power amplification circuit 201 and left audio positive output end L+.The present embodiment is only using main control module 10 as system controller, it is that example is described that power amplification circuit 201 only realizes signal amplifying function, certainly, if there is controller (as microcontroller, central processor CPU, digital signal processor DSP, SOC (system on a chip) SOC) in power amplification circuit 201, the controller exported after then the test side DET of main control module 10 detects high level in control signal control power amplification circuit 201 exports the first audio signal, and power amplification circuit 201 exports to loud speaker 40 after first audio signal being amplified again.
Because the anode of the 6th pin P6, the 7th pin P7 of the right audio channel positive output end R+ of power amplification circuit 201, earphone socket 30, right channel loudspeaker 401, negative terminal and ground form loop, therefore the first audio signal exported from the right audio channel positive output end R+ of power amplification circuit 201 exports the anode of right channel loudspeaker 401 to through the 6th pin P6, the 7th pin P7 of earphone socket 30, drive right channel loudspeaker 401 sounding; Simultaneously, because the anode of the second pin P2, the 3rd pin P3 of the left audio positive output end L+ of power amplification circuit 201, earphone socket 30, left channel loudspeaker 402, negative terminal and ground form loop, therefore the first audio signal exported from the left audio positive output end L+ of power amplification circuit 201 exports the anode of left channel loudspeaker 402 to through the second pin P2, the 3rd pin P3 of earphone socket 30, drive left channel loudspeaker 402 sounding.
When having earphone plugged earphone socket 30,6th pin P6 of earphone socket 30 is by the 5th pin P5 jack-up, 6th pin P6 and the 7th pin P7 disconnects, and the 3rd pin P3 of earphone socket 30 is by the 4th pin P4 jack-up, and the second pin P2 and the 3rd pin P3 disconnects.Now, the output of headset detection module 50 is low level, thus the test side DET of main control module 10 detects low level, main control module 10 exports the second audio signal (sound effect parameters that this second audio signal meets earphone is arranged) to power amplification circuit 201, the second audio signal that main control module 10 exports by power amplification circuit 201 is amplified, and the second audio signal after amplifying is exported from the right audio channel positive output end R+ of power amplification circuit 201 and left audio positive output end L+.The second audio signal exported from the right audio channel positive output end R+ of power amplification circuit 201 exports the 5th pin P5 of earphone socket 30 to through the first electric capacity C1, the first resistance R1, simultaneously, the second audio signal exported from the left audio positive output end L+ of power amplification circuit 201 exports the 4th pin P4 of earphone socket 30 to through the second electric capacity C2, the second resistance R2, to drive earphone sounding.
In conjunction with reference Fig. 1 and Fig. 3, wherein Fig. 3 is the electrical block diagram of another embodiment of the utility model audio output control circuit.
As shown in Figure 3, the output of audio frequency power amplifier module 20 comprises right audio channel output and left audio output, loud speaker 40 comprises right channel loudspeaker 401 and left channel loudspeaker 402, and the input of headset detection module 50 comprises the first detection input and second and detects input.
Earphone socket 30 comprises the first pin P1, the second pin P2, the 3rd pin P3, the 4th pin P4, the 5th pin P5, the 6th pin P6 and the 7th pin P7; When earphone socket 30 non-frames connecting with headphone, the 6th pin P6 and the 7th pin P7 is electrically connected, and the second pin P2 and the 3rd pin P3 is electrically connected; When earphone socket 30 frames connecting with headphone, the 6th pin P6 and the 7th pin P7 disconnects, and the second pin P2 and the 3rd pin P3 disconnects; In Fig. 3, first pin P1 ground connection, 5th pin P5 is all connected with right audio channel output with the 6th pin P6,7th pin P7 is connected with right channel loudspeaker 401, and detect input with first of headset detection module 50 and be connected, second pin P2 is all connected with left audio output with the 4th pin P4, and the 3rd pin P3 is connected with left channel loudspeaker 402, and detects input with second of headset detection module 50 and be connected.
In the embodiment of a distortion, the annexation of the 6th pin P6, the 7th pin P7 and audio frequency power amplifier module 20, loud speaker 40 and headset detection module 50 can be exchanged, namely the 6th pin P6 detects input with first of headset detection module 50 and right channel loudspeaker 401 is connected respectively, and the 7th pin P7 is connected with the right audio channel output of audio frequency power amplifier module 20; In like manner, the annexation of the second pin P2, the 3rd pin P3 and audio frequency power amplifier module 20, loud speaker 40 and headset detection module 50 also can be exchanged, namely the second pin P2 detects input with second of headset detection module 50 and left channel loudspeaker 402 is connected respectively, and the 3rd pin P3 is connected with the left audio output of audio frequency power amplifier module 20.
Particularly, in Fig. 3, audio frequency power amplifier module 20 comprises power amplification circuit 201, first resistance R1 and the second resistance R2, and power amplification circuit 201 comprises right audio channel positive output end R+, right audio channel negative output terminal R-, left audio positive output end L+ and left audio negative output terminal L-; Right audio channel positive output end R+ is the right audio channel output of audio frequency power amplifier module 20, and left audio positive output end L+ is the left audio output of audio frequency power amplifier module 20.
Wherein, right audio channel positive output end R+ is connected with the 6th pin P6 of earphone socket 30, and is connected with the 5th pin P5 of earphone socket 30 via the first resistance R1; Left audio positive output end L+ is connected with the second pin P2 of earphone socket 30, and is connected with the 4th pin P4 of earphone socket 30 via the second resistance R2.
7th pin P7 of earphone socket 30 is connected with the anode of right channel loudspeaker 401, and detects input with first of headset detection module 50 and be connected, and the negative terminal of right channel loudspeaker 401 is connected with right audio channel negative output terminal R-; 3rd pin P3 of earphone socket 30 is connected with the anode of left channel loudspeaker 402, and detects input with second of headset detection module 50 and be connected, and the negative terminal of left channel loudspeaker 402 is connected with left audio negative output terminal L-.
In the present embodiment, when the output packet of power amplification circuit 201 is containing DC component, audio frequency power amplifier module 20 also comprises the first electric capacity C1, the second electric capacity C2, the 3rd electric capacity C3 and the 4th electric capacity C4 further.
One end of first electric capacity C1 is connected with right audio channel positive output end R+, and the other end of the first electric capacity C1 is connected with the 5th pin P5 of earphone socket 30 via the first resistance R1; One end of second electric capacity C2 is connected with left audio positive output end L+, and the other end of the second electric capacity C2 is connected with the 4th pin P4 of earphone socket 30 via the second resistance R2.
One end of 3rd electric capacity C3 is connected with the negative terminal of right channel loudspeaker 401, and the other end of the 3rd electric capacity C3 is connected with the right audio channel negative output terminal R-of power amplification circuit 201; One end of 4th electric capacity C4 is connected with the negative terminal of left channel loudspeaker 402, and the other end of the 4th electric capacity C4 is connected with the left audio negative output terminal L-of power amplification circuit 201.
First electric capacity C1, the second electric capacity C2, the 3rd electric capacity C3 and the 4th electric capacity C4 are as capacitance, and for the DC component in the audio signal that filtering power amplification circuit 201 exports, the audio signal guaranteeing to export to loud speaker 40 or earphone is pure AC signal.
Particularly, in Fig. 3, headset detection module 50 comprises the 3rd resistance R3, the 4th resistance R4, the 5th resistance R5 and the 5th electric capacity C5.
One end of 3rd resistance R3 is connected with the test side DET of main control module 10, and is connected with the 7th pin P7 of earphone socket 30 via the 4th resistance R4, is also connected with the 3rd pin P3 of earphone socket 30 via the 5th resistance R5, the other end ground connection of the 3rd resistance R3; 5th electric capacity C5 is in parallel with the 3rd resistance R3.
In the embodiment of a distortion, headset detection module 50 only can comprise the 3rd resistance R3, 4th resistance R4 and the 5th electric capacity C5, namely in figure 3, 3rd pin P3 of earphone socket 30 directly connects the 3rd resistance R3, the 5th resistance R5 is not met between 3rd pin P3 of earphone socket 30 and the 3rd resistance R3, or headset detection module 50 only can comprise the 3rd resistance R3, 5th resistance R5 and the 5th electric capacity C5, namely in figure 3, 7th pin P7 of earphone socket 30 directly connects the 3rd resistance R3, the 4th resistance R4 is not met between 7th pin P7 of earphone socket 30 and the 3rd resistance R3.
In audio output control circuit as shown in Figure 3, power amplification circuit 201 exports the audio signal of R channel and L channel in a differential manner, and the audio output control circuit operation principle shown in Fig. 3 specifically describes as follows:
When not having earphone plugged earphone socket 30, the 6th pin P6 and the 7th pin P7 of earphone socket 30 are electrically connected, and the second pin P2 and the 3rd pin P3 of earphone socket 30 are electrically connected.The audio signal exported from the right audio channel positive output end R+ of power amplification circuit 201 outputs to the 6th pin P6 of earphone socket 30, output to the 7th pin P7 of earphone socket 30 again, then output to the anode of right channel loudspeaker 401 by the 7th pin P7 of earphone socket 30.The audio signal exported from the left audio positive output end L+ of power amplification circuit 201 outputs to the second pin P2 of earphone socket 30, output to the 3rd pin P3 of earphone socket 30 again, then output to the anode of left channel loudspeaker 402 by the 3rd pin P3 of earphone socket 30.
Simultaneously, the 3rd resistance R3 in headset detection module 50 and the 4th resistance R4 samples to the voltage signal on the 7th pin P7 of earphone socket 30, 3rd resistance R3 and the 5th resistance R5 samples to the voltage signal on the 3rd pin P3 of earphone socket 30, the test side DET of main control module 10 is made to receive a high level, main control module 10 exports the first audio signal (sound effect parameters that this first audio signal meets loud speaker 40 is arranged) to power amplification circuit 201, the first audio signal that main control module 10 exports by power amplification circuit 201 is amplified, and by the right audio channel positive output end R+ of the first audio signal after amplifying from power amplification circuit 201, right audio channel negative output terminal R-, left audio positive output end L+ and left audio negative output terminal L-exports.The present embodiment is only using main control module 10 as system controller, it is that example is described that power amplification circuit 201 only realizes signal amplifying function, certainly, if there is controller (as microcontroller, central processor CPU, digital signal processor DSP, SOC (system on a chip) SOC) in power amplification circuit 201, the controller exported after then the test side DET of main control module 10 detects high level in control signal control power amplification circuit 201 exports the second audio signal, and the second audio signal is carried out amplification and exported to earphone by power amplification circuit 201 again.
Export the first audio signal for the right audio channel positive output end R+ of power amplification circuit 201 and left audio positive output end L+ to be described, due to the right audio channel positive output end R+ of power amplification circuit 201, 6th pin P6 of earphone socket 30, 7th pin P7, the anode of right channel loudspeaker 401, the right audio channel negative output terminal R-of negative terminal and power amplification circuit 201 forms loop, therefore the first audio signal exported from the right audio channel positive output end R+ of power amplification circuit 201 is through the 6th pin P6 of earphone socket 30, 7th pin P7 exports the anode of right channel loudspeaker 401 to, drive right channel loudspeaker 401 sounding, simultaneously, because the left audio negative output terminal L-of the anode of the second pin P2, the 3rd pin P3 of the left audio positive output end L+ of power amplification circuit 201, earphone socket 30, left channel loudspeaker 402, negative terminal and power amplification circuit 201 forms loop, therefore the first audio signal exported from the left audio positive output end L+ of power amplification circuit 201 exports the anode of left channel loudspeaker 402 to through the second pin P2, the 3rd pin P3 of earphone socket 30, drive left channel loudspeaker 402 sounding.
When having earphone plugged earphone socket 30,6th pin P6 of earphone socket 30 is by the 5th pin P5 jack-up, 6th pin P6 and the 7th pin P7 disconnects, and the 3rd pin P3 of earphone socket 30 is by the 4th pin P4 jack-up, and the second pin P2 and the 3rd pin P3 disconnects.Now, the output of headset detection module 50 is low level, thus the test side DET of main control module 10 is low level, main control module 10 exports the second audio signal (sound effect parameters that this second audio signal meets earphone is arranged) to power amplification circuit 201, the second audio signal that main control module 10 exports by power amplification circuit 201 is amplified, and the second audio signal after amplifying is exported from the right audio channel positive output end R+ of power amplification circuit 201 and left audio positive output end L+.The second audio signal exported from the right audio channel positive output end R+ of power amplification circuit 201 exports the 5th pin P5 of earphone socket 30 to through the first electric capacity C1, the first resistance R1, simultaneously, the second audio signal exported from the left audio positive output end L+ of power amplification circuit 201 exports the 4th pin P4 of earphone socket 30 to through the second electric capacity C2, the second resistance R2, to drive earphone sounding.
The utility model also provides a kind of audio-frequence player device, and this audio-frequence player device comprises audio output control circuit, and the structure of this audio output control circuit, operation principle and the beneficial effect that brings, all with reference to above-described embodiment, repeat no more herein.
The foregoing is only preferred embodiment of the present utility model; not thereby the scope of the claims of the present utility model is limited; every utilize the utility model specification and accompanying drawing content to do equivalent structure or equivalent flow process conversion; 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 (10)
1. an audio output control circuit, comprise earphone socket, loud speaker, it is characterized in that, also comprise the headset detection module for exporting corresponding detection signals according to the connection status of earphone socket and earphone, for export according to described detection signal the first audio signal or the second audio signal main control module, for exporting to loud speaker after described first audio signal being amplified or exporting to the audio frequency power amplifier module of earphone after described second audio signal being amplified;
The input of described audio frequency power amplifier module is connected with the audio signal output end of described main control module, the output of described audio frequency power amplifier module is connected with described earphone socket, and the output of described audio frequency power amplifier module is connected with the input of described headset detection module and described loud speaker respectively by described earphone socket, the output of described headset detection module is connected with the test side of described main control module.
2. audio output control circuit as claimed in claim 1, it is characterized in that, the output of described audio frequency power amplifier module comprises right audio channel output and left audio output, described loud speaker comprises right channel loudspeaker and left channel loudspeaker, and the input of described headset detection module comprises the first detection input and second and detects input;
Described earphone socket comprises the first pin, the second pin, the 3rd pin, the 4th pin, the 5th pin, the 6th pin and the 7th pin; When the non-frames connecting with headphone of described earphone socket, described 6th pin and the electrical connection of the 7th pin, and the second pin and the electrical connection of the 3rd pin; When described earphone socket frames connecting with headphone, described 6th pin and the 7th pin disconnect, and the second pin and the 3rd pin disconnect; Described first pin ground connection, described 5th pin is all connected with described right audio channel output with the 6th pin, described 7th pin is connected with described right channel loudspeaker, and detect input with first of described headset detection module and be connected, described second pin is all connected with described left audio output with the 4th pin, described 3rd pin is connected with described left channel loudspeaker, and detects input with second of described headset detection module and be connected.
3. audio output control circuit as claimed in claim 2, it is characterized in that, described audio frequency power amplifier module comprises power amplification circuit, the first resistance and the second resistance, and described power amplification circuit comprises right audio channel positive output end and left audio positive output end; Described right audio channel positive output end is the right audio channel output of described audio frequency power amplifier module, and described left audio positive output end is the left audio output of described audio frequency power amplifier module;
Described right audio channel positive output end is connected with the 6th pin of described earphone socket, and is connected with the 5th pin of described earphone socket via described first resistance; Described left audio positive output end is connected with the second pin of described earphone socket, and is connected with the 4th pin of described earphone socket via described second resistance;
7th pin of described earphone socket is connected with the anode of described right channel loudspeaker, and detects input with first of described headset detection module and be connected, the negativing ending grounding of described right channel loudspeaker; 3rd pin of described earphone socket is connected with the anode of described left channel loudspeaker, and detects input with second of described headset detection module and be connected, the negativing ending grounding of described left channel loudspeaker.
4. audio output control circuit as claimed in claim 3, it is characterized in that, described audio frequency power amplifier module also comprises the first electric capacity, the second electric capacity, the 3rd electric capacity and the 4th electric capacity;
One end of described first electric capacity is connected with described right audio channel positive output end, and the other end of described first electric capacity is connected with the 5th pin of described earphone socket via described first resistance; One end of described second electric capacity is connected with described left audio positive output end, and the other end of described second electric capacity is connected with the 4th pin of described earphone socket via described second resistance;
One end of described 3rd electric capacity is connected with the 7th pin of described earphone socket, and the other end of described 3rd electric capacity is connected with the anode of described right channel loudspeaker; One end of described 4th electric capacity is connected with the 3rd pin of described earphone socket, and the other end of described 4th electric capacity is connected with the anode of described left channel loudspeaker.
5. audio output control circuit as claimed in claim 2, it is characterized in that, described audio frequency power amplifier module comprises power amplification circuit, the first resistance and the second resistance, and described power amplification circuit comprises right audio channel positive output end, right audio channel negative output terminal, left audio positive output end and left audio negative output terminal; Described right audio channel positive output end is the right audio channel output of described audio frequency power amplifier module, and described left audio positive output end is the left audio output of described audio frequency power amplifier module;
Described right audio channel positive output end is connected with the 6th pin of described earphone socket, and is connected with the 5th pin of described earphone socket via described first resistance; Described left audio positive output end is connected with the second pin of described earphone socket, and is connected with the 4th pin of described earphone socket via described second resistance;
7th pin of described earphone socket is connected with the anode of described right channel loudspeaker, and detects input with first of described headset detection module and be connected, and the negative terminal of described right channel loudspeaker is connected with described right audio channel negative output terminal; 3rd pin of described earphone socket is connected with the anode of described left channel loudspeaker, and detects input with second of described headset detection module and be connected, and the negative terminal of described left channel loudspeaker is connected with described left audio negative output terminal.
6. audio output control circuit as claimed in claim 5, it is characterized in that, described audio frequency power amplifier module also comprises the first electric capacity, the second electric capacity, the 3rd electric capacity and the 4th electric capacity;
One end of described first electric capacity is connected with described right audio channel positive output end, and the other end of described first electric capacity is connected with the 5th pin of described earphone socket via described first resistance; One end of described second electric capacity is connected with described left audio positive output end, and the other end of described second electric capacity is connected with the 4th pin of described earphone socket via described second resistance;
One end of described 3rd electric capacity is connected with the negative terminal of described right channel loudspeaker, and the described other end of the 3rd electric capacity is connected with the right audio channel negative output terminal of power amplification circuit; One end of described 4th electric capacity is connected with the negative terminal of described left channel loudspeaker, and the described other end of the 4th electric capacity is connected with the left audio negative output terminal of power amplification circuit.
7. audio output control circuit as claimed in claim 6, it is characterized in that, described headset detection module comprises the 3rd resistance, the 4th resistance, the 5th resistance and the 5th electric capacity;
One end of described 3rd resistance is connected with the test side of described main control module, and be connected with the 7th pin of described earphone socket via described 4th resistance, also be connected with the 3rd pin of described earphone socket via described 5th resistance, the other end ground connection of described 3rd resistance; Described 5th electric capacity and described 3rd resistor coupled in parallel.
8. audio output control circuit as claimed in claim 6, it is characterized in that, described headset detection module comprises the 3rd resistance, the 4th resistance and the 5th electric capacity;
One end of described 3rd resistance is connected with the test side of described main control module, and be connected with the 7th pin of described earphone socket via described 4th resistance, one end of described 3rd resistance is also connected with the 3rd pin of described earphone socket, the other end ground connection of described 3rd resistance; Described 5th electric capacity and described 3rd resistor coupled in parallel.
9. audio output control circuit as claimed in claim 6, it is characterized in that, described headset detection module comprises the 3rd resistance, the 4th resistance and the 5th electric capacity;
One end of described 3rd resistance is connected with the test side of described main control module, and is connected with the 7th pin of described earphone socket, is also connected with the 3rd pin of described earphone socket via described 4th resistance, the other end ground connection of described 3rd resistance; Described 5th electric capacity and described 3rd resistor coupled in parallel.
10. an audio-frequence player device, is characterized in that, comprises the audio output control circuit in claim 1 to 9 described in any one.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420317078.1U CN204090123U (en) | 2014-06-13 | 2014-06-13 | Audio output control circuit and audio-frequence player device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420317078.1U CN204090123U (en) | 2014-06-13 | 2014-06-13 | Audio output control circuit and audio-frequence player device |
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| CN204090123U true CN204090123U (en) | 2015-01-07 |
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| CN201420317078.1U Expired - Lifetime CN204090123U (en) | 2014-06-13 | 2014-06-13 | Audio output control circuit and audio-frequence player device |
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| CN104967945A (en) * | 2015-06-03 | 2015-10-07 | 广东欧珀移动通信有限公司 | Headphone power amplifier and method for controlling same |
| CN105142072A (en) * | 2015-09-30 | 2015-12-09 | 惠州Tcl移动通信有限公司 | Audio apparatus with externally connected player and audio playing method thereof |
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| CN105721986A (en) * | 2016-05-06 | 2016-06-29 | 深圳精拓创新科技有限公司 | Power amplifier circuit and loudspeaker system |
| WO2016127476A1 (en) * | 2015-02-10 | 2016-08-18 | 深圳市奥星澳科技有限公司 | Headset control circuit, drive-by-wire device and tuning headset |
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| CN105721986A (en) * | 2016-05-06 | 2016-06-29 | 深圳精拓创新科技有限公司 | Power amplifier circuit and loudspeaker system |
| CN106886388A (en) * | 2017-02-22 | 2017-06-23 | 维沃移动通信有限公司 | The method and terminal of a kind of playing audio-fequency data |
| CN106886388B (en) * | 2017-02-22 | 2019-12-20 | 维沃移动通信有限公司 | Method and terminal for playing audio data |
| CN108900940A (en) * | 2018-06-21 | 2018-11-27 | 珠海市杰理科技股份有限公司 | A kind of audio input circuit of the straight ear pushing machine of direct-coupling MCU |
| CN111770415A (en) * | 2019-07-12 | 2020-10-13 | 北京京东尚科信息技术有限公司 | Method and device for switching loudspeaker and earphone |
| CN111770415B (en) * | 2019-07-12 | 2021-12-03 | 北京京东尚科信息技术有限公司 | Method and device for switching loudspeaker and earphone |
| CN114567848A (en) * | 2022-01-26 | 2022-05-31 | 惠州华阳通用电子有限公司 | Audio output channel state detection device and method |
| CN114567848B (en) * | 2022-01-26 | 2024-05-07 | 惠州华阳通用电子有限公司 | Audio output channel state detection device and method |
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