CN216057450U - Audio playing circuit - Google Patents
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- CN216057450U CN216057450U CN202122640908.7U CN202122640908U CN216057450U CN 216057450 U CN216057450 U CN 216057450U CN 202122640908 U CN202122640908 U CN 202122640908U CN 216057450 U CN216057450 U CN 216057450U
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Abstract
The utility model discloses an audio playing circuit, which is provided with an external audio input end and an external audio detection end; the audio playing circuit comprises an audio output module and a loudspeaker module; the audio output end of the audio output module is connected with the audio connecting end of the loudspeaker module, and the audio connecting end of the loudspeaker module is also connected with an external audio input end; the detection end of the audio output module is connected with the external audio detection end; the external audio input end is used for being connected with the audio input end and the ground end of the access end of the external audio input module, and the detection end is used for being connected with the ground end of the access end of the external audio input module. Through the structure, the audio input playing of the external audio input module is realized, and compared with the mode of adopting a power amplifier circuit in the prior art, the audio playing circuit disclosed by the utility model is simpler in design, does not need to increase a complex power amplifier circuit, enables the hardware development to be simpler, is beneficial to improving the yield of products, and simultaneously reduces the overall power consumption and the cost of the circuit.
Description
Technical Field
The utility model relates to the technical field of electronic circuits, in particular to an audio playing circuit.
Background
The earphone is a common electronic product in daily life, a common earphone interface is an AUX (audio) interface, and the AUX interface is an audio input interface and can input audio of electronic audio equipment including MP 3. The earphone product can play music, and the earphone with the AUX interface can also play music through external equipment. When the AUX interface of the earphone is not accessed to the external device to play music, the working circuit is as shown in fig. 1. The earphone plays the audio frequency and adopts differential transmission mode, and the audio chip output sound channel of earphone, the anodal and the negative pole of right loudspeaker are connected respectively to right sound channel positive pole (SPKR _ P), right sound channel negative pole (SPKR _ N), and the anodal and the negative pole of left loudspeaker are connected respectively to left sound channel positive pole (SPKL _ P), left sound channel negative pole (SPKL _ N). When the AUX interface of the earphone is accessed to the external device to play music, namely when the external device is accessed to the AUX interface female head of the earphone through the AUX interface male head, because the audio input of the external device can not be directly played through the earphone audio chip, in the prior art, a power amplifier module 100 is often added between an audio chip of an earphone and a loudspeaker, the differential input is changed into the common ground output through the power amplifier module 100 to play the audio input by the external device, fig. 2 is a prior art earphone audio playing circuit, the audio playing circuit of the earphone is connected with an AUX interface female head, the ground end of the AUX interface female head is grounded, one end of the AUX interface female head, which is connected with the right sound channel anode, is used for being connected with a right sound port of the AUX interface male head, one end of the AUX interface female head, which is connected with the left sound channel anode, is used for being connected with a left sound port of the AUX interface male head, and the right sound channel cathode and the left sound channel cathode are both grounded. Due to the addition of the power amplifier module 100, the design difficulty of the audio playing circuit of the earphone is increased, the power consumption is increased, and a power amplifier chip is required to be added, so that the cost is increased.
SUMMERY OF THE UTILITY MODEL
The technical problem to be solved by the present invention is to provide an audio playing circuit, which can simplify the circuit structure of the audio playing circuit of an earphone, and can realize audio playing when an external device is accessed without adding a power amplifier module.
To solve the above technical problems, an embodiment of the present invention provides an audio playback circuit. The audio playing circuit is provided with an external audio input end and an external audio detection end; the audio playing circuit comprises an audio output module and a loudspeaker module; the audio output end of the audio output module is connected with the audio connecting end of the loudspeaker module, and the audio connecting end of the loudspeaker module is also connected with the external audio input end; the detection end of the audio output module is connected with the external audio detection end; the external audio input end is used for being connected with an audio input end and a ground end of an access end of the external audio input module, and the detection end is used for being connected with the ground end of the access end of the external audio input module.
In an optional implementation manner, the external audio input end includes a positive audio input end and a negative audio input end, and the audio connection end of the speaker module includes a positive audio connection end and a negative audio connection end;
the audio frequency link of loudspeaker module still with outside audio input end is connected, specifically is: the positive audio connecting end of the loudspeaker module is connected with the positive audio input end, and the negative audio connecting end of the loudspeaker module is connected with the negative audio input end;
the external audio input end is used for being connected with the audio input end and the ground end of the access end of the external audio input module, and specifically comprises the following steps: the positive audio input end is used for being connected with an audio input end of an access end of an external audio input module, and the negative audio input end is used for being connected with a ground end of the access end of the external audio input module.
In an optional implementation manner, the audio output end of the audio output module includes a positive audio output end and a negative audio output end;
the audio output end of the audio output module is connected with the audio connecting end of the loudspeaker module, and specifically comprises the following steps: the positive audio output end of the audio output module is connected with the positive audio connecting end of the horn module, and the negative audio output end of the audio output module is connected with the negative audio connecting end of the horn module.
In an optional embodiment, the positive audio input includes a left channel positive audio input and a right channel positive audio input, and the negative audio input includes a left channel negative audio input and a right channel negative audio input; the positive audio connecting end of the loudspeaker module comprises a left channel positive audio connecting end and a right channel positive audio connecting end, and the negative audio connecting end comprises a left channel negative audio connecting end and a right channel negative audio connecting end; the audio input end of the access end of the external audio input module comprises a left channel audio input end and a right channel audio input end;
the anodal audio link of loudspeaker module with anodal audio input end is connected, the negative pole audio link of loudspeaker module with negative pole audio input end is connected, specifically is:
the left sound channel positive audio connecting end of the horn module is connected with the left sound channel positive audio input end, and the right sound channel positive audio connecting end of the horn module is connected with the right sound channel positive audio input end; the left channel negative audio connecting end of the horn module is connected with the left channel negative audio input end, and the right channel negative audio connecting end of the horn module is connected with the right channel negative audio input end;
the positive audio input end is used for being connected with the audio input end of the incoming end of the external audio input module, and the negative audio input end is used for being connected with the ground end of the incoming end of the external audio input module, and specifically comprises the following steps:
the audio input terminal is used for being connected with the left channel audio input terminal of the access end of the external audio input module, the right channel positive audio input terminal is used for being connected with the right channel audio input terminal of the access end of the external audio input module, and the left channel negative audio input terminal and the right channel negative audio input terminal are respectively used for being connected with the ground end of the access end of the external audio input module.
In an optional implementation manner, the audio output ends of the audio output module include a left channel positive audio output end, a right channel positive audio output end, a left channel negative audio output end, and a right channel negative audio output end;
the audio output end of the audio output module is connected with the audio connecting end of the loudspeaker module, and specifically comprises the following steps: the audio output module's anodal audio output of left channel with the anodal audio link of left channel of loudspeaker module is connected, audio output module's anodal audio output of right channel with the anodal audio link of right channel of loudspeaker module is connected, audio output module's left channel negative pole audio output with the left channel negative pole audio link of loudspeaker module is connected, audio output module's right channel negative pole audio output with the right channel negative pole audio link of loudspeaker module is connected.
In an optional implementation manner, the external audio input terminal and the external audio detection terminal are both disposed on the same interface.
In an optional implementation manner, the external audio input terminal and the external audio detection terminal are both disposed on the AUX interface.
In an optional implementation manner, the external audio input terminal and the external audio detection terminal are both disposed on the AUX interface mother head.
In an optional embodiment, the audio playback circuit further comprises an external audio input module; the access end of the external audio input module is provided with an audio input end and a ground end, and the ground end is grounded.
In an alternative embodiment, the access end of the external audio input module further has a microphone connection end; the microphone connecting end is connected with the ground end.
Compared with the prior art, the embodiment of the utility model has the beneficial effects that: the embodiment of the utility model provides an audio playing circuit which is provided with an external audio input end and an external audio detection end; the audio playing circuit comprises an audio output module and a loudspeaker module; the audio output end of the audio output module is connected with the audio connecting end of the loudspeaker module, and the audio connecting end of the loudspeaker module is also connected with the external audio input end; the detection end of the audio output module is connected with the external audio detection end; the external audio input end is used for being connected with an audio input end and a ground end of an access end of the external audio input module, and the detection end is used for being connected with the ground end of the access end of the external audio input module. Through the structure, the audio input playing of the external audio input module is realized, and compared with the mode of adopting a power amplifier circuit in the prior art, the audio playing circuit disclosed by the utility model is simpler in design, does not need to increase a complex power amplifier circuit, enables the hardware development to be simpler, is beneficial to improving the yield of products, and simultaneously reduces the overall power consumption and the cost of the circuit.
Drawings
Fig. 1 is an equivalent circuit diagram of an earphone audio playing circuit when an external device is not accessed in the prior art;
FIG. 2 is a schematic diagram of a prior art earphone audio playing circuit;
fig. 3 is a schematic structural diagram of an audio playback circuit according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Please refer to fig. 3, which is a schematic structural diagram of an audio playback circuit according to an embodiment of the present invention.
The embodiment of the utility model provides an audio playing circuit which is provided with an external audio input end (LP 0, LN0, RP0 and RN 0) and an external audio detection end DET 0; the audio playing circuit comprises an audio output module 10 and a loudspeaker module 20; the audio output terminals (LP 1, LN1, RP1, RN 1) of the audio output module 10 are connected to the audio connection terminals (SPKR _ LP, SPKR _ LN, SPKR _ RP, SPKR _ RN) of the horn module 20, and the audio connection terminals (SPKR _ LP, SPKR _ LN, SPKR _ RP, SPKR _ RN) of the horn module 20 are also connected to the external audio input terminals (LP 0, LN0, RP0, RN 0); the detection terminal DET of the audio output module 10 is connected to the external audio detection terminal DET 0; the external audio input terminals (LP 0, LN0, RP0, RN 0) are used for being connected with the audio input terminal (L, R) of the access terminal 30 of the external audio input module and the ground terminal GND, and the detection terminal is used for being connected with the ground terminal GND of the access terminal 30 of the external audio input module.
The working principle of the audio playing circuit provided by the utility model is as follows: when the external audio input module is not accessed, the external audio connection terminals (SPKR _ LP, SPKR _ LN, SPKR _ RP, SPKR _ RN) are not connected to the external audio detection terminal DET0, and the audio output module 10 in the audio playback circuit provides an audio signal to the speaker module 20, and the equivalent diagram of the operation thereof is the same as that shown in fig. 1. When the external audio input module is connected, the external audio detection terminal DET0 is connected to the ground GND of the input terminal 30 of the external audio input module, the voltage is pulled low, and the audio output module 10 is triggered to disconnect the audio output terminal (LP 1, LN1, RP1, RN 1) from the audio connection terminal (SPKR _ LP, SPKR _ LN, SPKR _ RP, SPKR _ RN) of the speaker module 20, at this time, since the input terminal 30 and the ground GND of the external audio input module are connected to the audio connection terminals (SPKR _ LP, SPKR LN, SPKR _ RP, SPKR _ RN) of the speaker module 20, the audio signal of the speaker module 20 is provided by the external audio input module. Through the structure, the audio input playing of the external audio input module is realized, and compared with the mode of adopting a power amplifier circuit in the prior art, the audio playing circuit disclosed by the utility model is simpler in design, does not need to increase a complex power amplifier circuit, enables the hardware development to be simpler, is beneficial to improving the yield of products, and simultaneously reduces the overall power consumption and the cost of the circuit.
In an alternative embodiment, the external audio inputs (LP 0, LN0, RP0, RN 0) comprise positive audio inputs (LP 0, RP 0) and negative audio inputs (LN 0, RN 0), and the audio connections (SPKR _ LP, SPKR _ LN, SPKR _ RP, SPKR _ RN) of the horn module 20 comprise positive audio connections (SPKR _ LP, SPKR _ RP) and negative audio connections (SPKR _ LN, SPKR _ RN);
the audio connection terminals (SPKR _ LP, SPKR _ LN, SPKR _ RP, SPKR _ RN) of the speaker module 20 are also connected to the external audio input terminals (LP 0, LN0, RP0, RN 0), specifically: the positive audio connecting ends (SPKR _ LP, SPKR _ RP) of the speaker module 20 are connected to the positive audio input ends (LP 0, RP 0), and the negative audio connecting ends (SPKR _ LN, SPKR _ RN) of the speaker module 20 are connected to the negative audio input ends (LN 0, RN 0);
the external audio input terminals (LP 0, LN0, RP0, RN 0) are used for being connected to the audio input terminal (L, R) of the access terminal 30 of the external audio input module and the ground terminal GND, specifically: the positive audio input terminals (LP 0, RP 0) are adapted to be connected to an audio input terminal (L, R) of the access terminal 30 of the external audio input module, and the negative audio input terminals (LN 0, RN 0) are adapted to be connected to a ground terminal GND of the access terminal 30 of the external audio input module.
In this embodiment, when the external audio input module is connected, the audio output module 10 detects the connection of the external audio input module, and disconnects the connection between the audio output terminal (LP 1, LN1, RP1, RN 1) and the audio connection terminal (SPKR _ LP, SPKR _ LN, SPKR _ RP, SPKR _ RN) of the speaker module 20, at this time, the audio input terminal (L, R) of the connection terminal 30 of the external audio input module is connected to the positive audio connection terminals (SPKR _ LP, SPKR _ RP) of the speaker module 20, the ground terminal GND of the connection terminal 30 of the external audio input module is connected to the negative audio connection terminals (SPKR _ LN, SPKR _ RN) of the speaker module 20, thereby implementing common ground audio playing, and the speaker module 20 plays the audio signal input by the external audio input module.
In an alternative embodiment, the audio outputs (LP 1, LN1, RP1, RN 1) of the audio output module 10 comprise a positive audio output (LP 1, RP 1) and a negative audio output (LN 1, RN 1);
the audio output terminals (LP 1, LN1, RP1, RN 1) of the audio output module 10 are connected to the audio connection terminals (SPKR _ LP, SPKR _ LN, SPKR _ RP, SPKR _ RN) of the speaker module 20, specifically: the positive audio output ends (LP 1, RP 1) of the audio output module 10 are connected to the positive audio connection ends (SPKR _ LP, SPKR _ RP) of the speaker module 20, and the negative audio output ends (LN 1, RN 1) of the audio output module 10 are connected to the negative audio connection ends (SPKR _ LN, SPKR _ RN) of the speaker module 20.
In this embodiment, the positive audio output terminals (LP 1, RP 1) and the negative audio output terminals (LN 1, RN 1) of the audio output module 10 are connected to the positive audio connection terminals (SPKR _ LP, SPKR _ RP) and the negative audio connection terminals (SPKR _ LN, SPKR _ RN) of the speaker module 20 in sequence.
In an alternative embodiment, the positive audio inputs (LP 0, RP 0) comprise a left channel positive audio input LP0 and a right channel positive audio input RP0, and the negative audio inputs (LN 0, RN 0) comprise a left channel negative audio input LN0 and a right channel negative audio input RN 0; the speaker module 20 includes a left channel speaker LH and a right channel speaker RH, the positive audio connection end (SPKR _ LP, SPKR _ RP) of the speaker module 20 includes a left channel positive audio connection end SPKR _ LP and a right channel positive audio connection end SPKR _ RP, and the negative audio connection end (SPKR _ LN, SPKR _ RN) includes a left channel negative audio connection end SPKR _ LN and a right channel negative audio connection end SPKR _ RN; the audio input end (L, R) of the input end 30 of the external audio input module comprises a left channel audio input end L and a right channel audio input end R; the left sound channel positive audio connecting end SPKR _ LP is connected with the positive electrode of a left sound channel loudspeaker LH, the left sound channel negative audio connecting end SPKR _ LN is connected with the negative electrode of the left sound channel loudspeaker LH, the right sound channel positive audio connecting end SPKR _ RP is connected with the positive electrode of a right sound channel loudspeaker RH, and the right sound channel negative audio connecting end SPKR _ RN is connected with the negative electrode of the right sound channel loudspeaker RH;
the positive audio connecting end (SPKR _ LP, SPKR _ RP) of the speaker module 20 is connected to the positive audio input end (LP 0, RP 0), and the negative audio connecting end (SPKR _ LN, SPKR _ RN) of the speaker module 20 is connected to the negative audio input end (LN 0, RN 0), specifically:
a left sound channel positive audio connecting end SPKR _ LP of the horn module 20 is connected with a left sound channel positive audio input end LP0, and a right sound channel positive audio connecting end SPKR _ RP of the horn module 20 is connected with a right sound channel positive audio input end RP 0; a left channel negative audio connecting end SPKR _ LN of the horn module 20 is connected with a left channel negative audio input end LN0, and a right channel negative audio connecting end SPKR _ RN of the horn module 20 is connected with a right channel negative audio input end RN 0;
the positive audio input terminals (LP 0, RP 0) are used for being connected with the audio input terminal (L, R) of the access terminal 30 of the external audio input module, and the negative audio input terminals (LN 0, RN 0) are used for being connected with the ground terminal GND of the access terminal 30 of the external audio input module, specifically:
the left channel positive audio input LP0 is configured to be connected to a left channel audio input L of the input terminal 30 of the external audio input module, the right channel positive audio input RP0 is configured to be connected to a right channel audio input R of the input terminal 30 of the external audio input module, and the left channel negative audio input LN0 and the right channel negative audio input RN0 are respectively configured to be connected to a ground GND of the input terminal 30 of the external audio input module.
The earphone is usually accompanied with a left channel speaker LH and a right channel speaker RH, in this embodiment, the left channel positive audio connection end SPKR _ LP of the speaker module 20 is connected to the right channel audio input end R of the access end 30 of the external audio input module through the left channel positive audio input end LP0, and the right channel positive audio connection end SPKR _ RP of the speaker module 20 is connected to the right channel audio input end R of the access end 30 of the external audio input module through the right channel positive audio input end RP0, so as to achieve better audio effect of the left and right channels output in a matching manner; after the external audio input module is connected, the left channel negative audio connection end SPKR _ LN and the right channel negative audio connection end SPKR _ RN of the speaker module 20 are all grounded.
In an alternative embodiment, the audio output terminals (LP 1, LN1, RP1, RN 1) of the audio output module 10 include a left channel positive audio output terminal LP1, a right channel positive audio output terminal RP1, a left channel negative audio output terminal LN1, and a right channel negative audio output terminal RN 1;
the audio output terminals (LP 1, LN1, RP1, RN 1) of the audio output module 10 are connected to the audio connection terminals (SPKR _ LP, SPKR _ LN, SPKR _ RP, SPKR _ RN) of the speaker module 20, specifically: the positive audio output end LP1 of the left channel of audio output module 10 is connected with the positive audio link end SPKR _ LP of the left channel of loudspeaker module 20, the positive audio output end RP1 of the right channel of audio output module 10 is connected with the positive audio link end SPKR _ RP of the right channel of loudspeaker module 20, the negative audio output end LN1 of the left channel of audio output module 10 is connected with the negative audio link end SPKR _ LN of the left channel of loudspeaker module 20, the negative audio output end RN1 of the right channel of audio output module 10 is connected with the negative audio link end SPKR _ RN of the right channel of loudspeaker module 20.
In this embodiment, the left channel positive audio output end LP1, the right channel positive audio output end RP1, the left channel negative audio output end LN1, and the right channel negative audio output end RN1 of the audio output module 10 are respectively connected to the left channel positive audio connection end SPKR _ LP, the right channel positive audio connection end SPKR _ RP, the left channel negative audio connection end SPKR _ LN, and the right channel negative audio connection end SPKR _ RN of the speaker module 20.
In an alternative embodiment, the external audio input terminals (LP 0, LN0, RP0, RN 0) and the external audio detection terminal DET0 are both provided on the same interface. In this embodiment, the external audio input terminals (LP 0, LN0, RP0, RN 0) and the external audio detection terminal DET0 are provided on the same interface, so that detection of external audio input and signal input can be performed simultaneously, and a user can access to an external device conveniently.
In an alternative embodiment, the external audio input terminals (LP 0, LN0, RP0, RN 0) and the external audio detection terminal DET0 are both provided on the AUX interface. The AUX interface is a common audio input interface, and the simplicity and the universality of the technical scheme can be improved by adopting the AUX interface as an external audio input end (LP 0, LN0, RP0 and RN 0) and an external audio detection end DET 0.
In an alternative embodiment, the external audio input terminals (LP 0, LN0, RP0, RN 0) and the external audio detection terminal DET0 are both disposed on the AUX interface socket. In another alternative embodiment, the external audio input terminals (LP 0, LN0, RP0, RN 0) and the external audio detection terminal DET0 are both disposed on the AUX interface male.
In an optional embodiment, the audio playback circuit further comprises an external audio input module; the input terminal 30 of the external audio input module has an audio input terminal (L, R) and a ground terminal GND which is grounded. In the present embodiment, since the ground terminal GND of the input terminal 30 of the external audio input module is grounded, when the audio playback circuit is connected to the external audio input module, common ground playback is implemented.
In an alternative embodiment, the incoming end 30 of the external audio input module also has a microphone connection end; the microphone connecting end is connected with the ground end GND. In some audio interfaces, a microphone interface is further included, and in order to fully utilize such an audio interface, the present embodiment connects a microphone connection terminal of the input terminal 30 of the external audio input module with the ground terminal GND, so that the microphone connection terminal is grounded, so that a port connected to the microphone connection terminal is grounded.
Compared with the prior art, the embodiment of the utility model has the beneficial effects that: the embodiment of the utility model provides an audio playing circuit which is provided with an external audio input end and an external audio detection end; the audio playing circuit comprises an audio output module and a loudspeaker module; the audio output end of the audio output module is connected with the audio connecting end of the loudspeaker module, and the audio connecting end of the loudspeaker module is also connected with an external audio input end; the detection end of the audio output module is connected with the external audio detection end; the external audio input end is used for being connected with the audio input end and the ground end of the access end of the external audio input module, and the detection end is used for being connected with the ground end of the access end of the external audio input module. Through the structure, the audio input playing of the external audio input module is realized, and compared with the mode of adopting a power amplifier circuit in the prior art, the audio playing circuit disclosed by the utility model is simpler in design, does not need to increase a complex power amplifier circuit, enables the hardware development to be simpler, is beneficial to improving the yield of products, and simultaneously reduces the overall power consumption and the cost of the circuit.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the utility model.
Claims (10)
1. An audio playing circuit is characterized in that the audio playing circuit is provided with an external audio input end and an external audio detection end; the audio playing circuit comprises an audio output module and a loudspeaker module; the audio output end of the audio output module is connected with the audio connecting end of the loudspeaker module, and the audio connecting end of the loudspeaker module is also connected with the external audio input end; the detection end of the audio output module is connected with the external audio detection end; the external audio input end is used for being connected with an audio input end and a ground end of an access end of the external audio input module, and the detection end is used for being connected with the ground end of the access end of the external audio input module.
2. The audio playback circuit of claim 1, wherein the external audio input comprises a positive audio input and a negative audio input, and the audio connection terminals of the speaker module comprise a positive audio connection terminal and a negative audio connection terminal;
the audio frequency link of loudspeaker module still with outside audio input end is connected, specifically is: the positive audio connecting end of the loudspeaker module is connected with the positive audio input end, and the negative audio connecting end of the loudspeaker module is connected with the negative audio input end;
the external audio input end is used for being connected with the audio input end and the ground end of the access end of the external audio input module, and specifically comprises the following steps: the positive audio input end is used for being connected with an audio input end of an access end of an external audio input module, and the negative audio input end is used for being connected with a ground end of the access end of the external audio input module.
3. The audio playback circuit of claim 2, wherein the audio output terminals of the audio output module comprise a positive audio output terminal and a negative audio output terminal;
the audio output end of the audio output module is connected with the audio connecting end of the loudspeaker module, and specifically comprises the following steps: the positive audio output end of the audio output module is connected with the positive audio connecting end of the horn module, and the negative audio output end of the audio output module is connected with the negative audio connecting end of the horn module.
4. The audio playback circuit of claim 2, wherein the positive audio inputs comprise a left channel positive audio input and a right channel positive audio input, and the negative audio inputs comprise a left channel negative audio input and a right channel negative audio input; the positive audio connecting end of the loudspeaker module comprises a left channel positive audio connecting end and a right channel positive audio connecting end, and the negative audio connecting end comprises a left channel negative audio connecting end and a right channel negative audio connecting end; the audio input end of the access end of the external audio input module comprises a left channel audio input end and a right channel audio input end;
the anodal audio link of loudspeaker module with anodal audio input end is connected, the negative pole audio link of loudspeaker module with negative pole audio input end is connected, specifically is:
the left sound channel positive audio connecting end of the horn module is connected with the left sound channel positive audio input end, and the right sound channel positive audio connecting end of the horn module is connected with the right sound channel positive audio input end; the left channel negative audio connecting end of the horn module is connected with the left channel negative audio input end, and the right channel negative audio connecting end of the horn module is connected with the right channel negative audio input end;
the positive audio input end is used for being connected with the audio input end of the incoming end of the external audio input module, and the negative audio input end is used for being connected with the ground end of the incoming end of the external audio input module, and specifically comprises the following steps:
the audio input terminal is used for being connected with the left channel audio input terminal of the access end of the external audio input module, the right channel positive audio input terminal is used for being connected with the right channel audio input terminal of the access end of the external audio input module, and the left channel negative audio input terminal and the right channel negative audio input terminal are respectively used for being connected with the ground end of the access end of the external audio input module.
5. The audio playback circuit of claim 4, wherein the audio output terminals of the audio output module comprise a left channel positive audio output terminal, a right channel positive audio output terminal, a left channel negative audio output terminal, and a right channel negative audio output terminal;
the audio output end of the audio output module is connected with the audio connecting end of the loudspeaker module, and specifically comprises the following steps: the audio output module's anodal audio output of left channel with the anodal audio link of left channel of loudspeaker module is connected, audio output module's anodal audio output of right channel with the anodal audio link of right channel of loudspeaker module is connected, audio output module's left channel negative pole audio output with the left channel negative pole audio link of loudspeaker module is connected, audio output module's right channel negative pole audio output with the right channel negative pole audio link of loudspeaker module is connected.
6. The audio playback circuit of claim 1, wherein the external audio input terminal and the external audio detection terminal are both disposed on the same interface.
7. The audio playback circuit of claim 6, wherein the external audio input terminal and the external audio detection terminal are both disposed on the AUX interface.
8. The audio playback circuit of claim 7, wherein the external audio input terminal and the external audio detection terminal are both disposed on an AUX interface socket.
9. The audio playback circuit of claim 1, wherein the audio playback circuit further comprises an external audio input module; the access end of the external audio input module is provided with an audio input end and a ground end, and the ground end is grounded.
10. The audio playback circuit of claim 9, wherein the access terminal of the external audio input module further has a microphone connection terminal; the microphone connecting end is connected with the ground end.
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| CN202122640908.7U CN216057450U (en) | 2021-11-01 | 2021-11-01 | Audio playing circuit |
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| CN202122640908.7U CN216057450U (en) | 2021-11-01 | 2021-11-01 | Audio playing circuit |
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