Audio switching circuit and audio equipment

Abstract

The utility model relates to the technical field of audio circuits, and discloses an audio switching circuit and audio device.The audio switching circuit comprises a first audio source input module, a second audio source input module, an audio source selection module and a switching speed adjusting module, the first audio source input module and the second audio source input module are used for providing audio signals, the audio source selection module is used for selecting audio sources, and the switching speed adjusting module is used for adjusting the audio source switching speed of the audio source selection module. The audio switching circuit provided by the utility model can select audio sources and complete switching of the audio sources, and the switching speed adjusting module can adjust the audio source switching speed of the audio source selection module, so that the buffer direct-current level hopping time of the coupling capacitor at the input end is prolonged, the voltage difference between the two ends of the coupling capacitor is small, and the reliability of the audio switching circuit is improved. Therefore, when audio source switching is completed, transient impact on the coupling capacitor is avoided, and finally blasting sound generated by audio source switching is eliminated.

Description

Technical Field

[0001] The present application relates to the technical field of audio circuits, and in particular to an audio switch circuit and an audio device. Background Art

[0002] In the related art, existing audio devices can usually receive different audio sources and play sounds through speakers. The DC levels required by audio devices to use different audio sources are also different. When switching audio sources, the DC level in the circuit will also jump, causing transient impact on the coupling capacitor at the audio input end, which is transmitted to the speaker, resulting in a short burst sound. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides an audio switch circuit and an audio device, which can eliminate the popping sound caused by switching the audio source.

[0004] To achieve the above-mentioned purpose, a first aspect of an embodiment of the present application provides an audio switch circuit, comprising:

[0005] A first audio source input module, the first audio source input module is used to provide a first audio signal;

[0006] A second audio source input module, the second audio source input module is used to provide a second audio signal;

[0007] An audio source selection module, the audio source selection module is used to select the first audio signal and the second audio signal to obtain a target audio signal;

[0008] The switching speed adjustment module is connected to the audio source selection module and is used to adjust the speed at which the audio source selection module switches the audio source.

[0009] The audio switch circuit proposed in the embodiment of the present application has at least the following beneficial effects: the audio source selection module can select between the first audio source input module and the second audio source input module and complete the switching of the audio source; the switching speed adjustment module can adjust the speed at which the audio source selection module switches the audio source, thereby increasing the time for the coupling capacitor at the input end to buffer the DC level jump, so that the voltage difference across the coupling capacitor is smaller, so that when the audio source switching is completed, no transient impact is caused to the coupling capacitor, and finally the explosive sound caused by switching the audio source is eliminated.

[0010] In some embodiments, the audio source selection module includes at least one switching switch, the switching switch having a moving end, a first static end, and a second static end, the moving end is used to connect to an external speaker, the first static end is used to connect to the first audio source input module, and the second static end is used to connect to the second audio source input module; the moving end is configured to be connected to the first static end, connected to the second static end, or disconnected.

[0011] In some embodiments, the audio source selection module has a mute pin, a selection pin and an output pin, the mute pin is used to turn off the output of the target audio signal, the selection pin is used to connect the moving end to the first static end, the selection pin is also used to connect the moving end to the second static end, and the output pin is used to connect to the moving end and an external speaker to output the target audio signal; the audio source selection module is also used to control the level of the mute pin according to the level status of the selection pin and the output pin.

[0012] In some embodiments, the audio source selection module has a soft start control pin, and the switching speed adjustment module includes an adjustable capacitor, one end of the adjustable capacitor is connected to the soft start control pin, and the other end of the adjustable capacitor is grounded, which is used to adjust the soft start time of the audio source selection module.

[0013] In some embodiments, the capacitance range of the adjustable capacitor matches the specification of the audio source selection module.

[0014] A second aspect of an embodiment of the present application proposes an audio device, comprising an audio switch circuit as described in the technical solution of the first aspect and at least one speaker, wherein at least one of the speakers is connected to an output end of the audio switch circuit.

[0015] The audio device proposed in the embodiment of the present application has at least the following beneficial effects: the audio device eliminates the explosive sound caused by switching the audio source by adopting the audio switch circuit of the first aspect.

[0016] In some embodiments, the audio device further includes a low voltage dropout linear regulator, and the low voltage dropout linear regulator is connected to the audio source selection module of the audio switch circuit.

[0017] In some embodiments, the audio device further includes a first electrostatic protector and a second electrostatic protector, the first electrostatic protector is connected to the low voltage difference linear regulator, and the second electrostatic protector is connected to the speaker.

[0018] In some embodiments, the audio device further includes a filter circuit, a first end of the filter circuit is connected to the low voltage drop linear regulator, and a second end of the filter circuit is connected to the audio switch circuit.

[0019] In some embodiments, the audio device further includes a controller, the controller is connected to the low voltage dropout linear regulator, and the controller is used to shut down the low voltage dropout linear regulator.

[0020] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0022] Figure 1 A module diagram of an audio switch circuit provided in an embodiment of the present application;

[0023] Figure 2 A circuit diagram of another audio switch circuit provided by the utility model;

[0024] Figure 3 The utility model provides a circuit diagram of an audio device.

[0025] Reference numerals: audio source selection module 1 ; first switching switch 11 ; second switching switch 12 ; first audio source input module 2 ; second audio source input module 3 ; first external speaker 4 ; second external speaker 5 ; switching speed adjustment module 6 ; controller 7 . DETAILED DESCRIPTION

[0026] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0027] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0028] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0029] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0030] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0031] Existing audio devices usually have multiple input functions and can play audio from different sources. For example, a device can receive wireless audio signals through a Bluetooth connection and use its speakers to play music; at the same time, the device can also play signals from other audio sources through wired methods, such as connecting to an AUX line (auxiliary input line), which means that users can choose to use wireless Bluetooth or wired AUX as the audio source of the current device as needed. When audio devices use different audio sources, the DC level required is also different, so when switching audio sources, the DC level in the circuit will also jump, causing a transient impact on the coupling capacitor at the audio input end. This impact will be transmitted to the speaker, resulting in a short burst of sound, resulting in a poor auditory experience for users during use.

[0032] Based on this, an audio switch circuit is provided in the embodiment of the present application. Figure 1 , Figure 1A module diagram of an audio switch circuit provided in an embodiment of the present application, wherein the audio switch circuit provided in an embodiment of the present application comprises a first audio source input module, a second audio source input module, an audio source selection module and a switching speed adjustment module, wherein the first audio source input module is used to provide a first audio signal, and the second audio source input module is used to provide a second audio signal, wherein the first audio source input module and the second audio source input module can be a Bluetooth chip, an auxiliary input interface (AUX, Audio Input), an RCA interface, and an optical fiber input interface, etc., the first audio signal and the second audio signal can be a digital audio signal and an analog audio signal, and the specific signal type is determined according to the selection of the audio source input module providing the audio signal, for example, when the first audio source input module is a Bluetooth chip, the first audio signal is a digital audio signal, and when the second audio source input module is an auxiliary input interface, the second audio signal is an analog audio signal.

[0033] The audio source selection module includes at least one switching switch, which is used to select the first audio signal and the second audio signal to obtain a target audio signal, wherein the target audio signal is the audio signal finally output to the external speaker. The switching speed adjustment module is connected to the audio source selection module. The switching speed adjustment module is used to adjust the speed at which the audio source selection module switches the audio source. The speed of switching the audio source can be achieved by adjusting the soft start time of the audio source selection module, or by adjusting the time for the switching switch to achieve signal selection, thereby affecting the time for the audio source selection module to complete the audio source switching, which also affects the speed at which the audio source selection module switches the audio source.

[0034] The audio switch circuit provided by the utility model can adjust the speed of switching the audio source by the audio source selection module, thereby increasing the time for the coupling capacitor at the input end to buffer the DC level jump, so that the voltage difference between the two ends of the coupling capacitor is small, so that when the audio source switching is completed, no transient impact is caused to the coupling capacitor, and finally the explosive sound caused by switching the audio source is eliminated.

[0035] In some embodiments, the switching switch of the audio source selection module has a moving end and two static ends, the moving end is connected to the external speaker, the two static ends are respectively a first static end and a second static end, the first static end is used to connect to the first audio source input module, the second static end is used to connect to the second audio source input module, and the moving end is configured to be connected to the first static end, connected to the second static end, or disconnected. It can be understood that when the moving end is connected to the first static end, the first audio source input module can output the first audio signal to the external speaker through the first static end and the moving end, and the first audio signal is the target audio signal at this time. When the moving end is connected to the second static end, the second audio source input module can output the second audio signal to the external speaker through the second static end and the moving end, and the second audio signal is the target audio signal. When the moving end is not connected to the first static end or the second static end, the connection is disconnected.

[0036] Please refer to Figure 2 , Figure 2 : is a circuit diagram of another audio switch circuit provided by the utility model. The audio source selection module 1 has two switching switches, namely, a first switching switch 11 and a second switching switch 12. For the first switching switch 11, the port I N_L1 connected to the first audio source input module 2 is the first movable end of the first switching switch 11, and the port I N_L2 connected to the second audio source input module 3 is the second movable end of the first switching switch 11. The movable end of the first switching switch 11 is the port L_SPKR, and the port L_SPKR is connected to the first external speaker 4. Similarly, for the second switching switch 12, the port I N_R1 is the first movable end of the second switching switch 12, and the port I N_R2 connected to the second audio source input module 3 is the second movable end of the second switching switch 12. The movable end of the second switching switch 12 is the port R_SPKR, and the port R_SPKR is connected to the second external speaker 5.

[0037] In some embodiments, the audio source selection module 1 has a mute pin MUTE, a selection pin SEL and an output pin, wherein the mute pin MUTE is used to turn off the output of the target audio signal, the selection pin SEL is used to connect the moving end to the first static end, and the moving end to the second static end, and the output pin is used to connect to the moving end and the external speaker to output the target audio signal. Specifically, the moving end of the switch is connected to the external speaker through the output pin. Figure 2 There are two switching switches, and correspondingly there are output pins corresponding to the two moving ends. The first output pin corresponding to the port L_SPKR is connected to the first external speaker 4 through the first inductor L1, and the second output pin corresponding to the port R_SPKR is connected to the second external speaker 5 through the second inductor L2.

[0038] It should be noted that, under the premise that the level of the mute pin MUTE is at a low level, the level of the selection pin SEL can control the moving end of the switching switch so that the moving end is connected to the first static end or the second static end. Specifically, when the level of the selection pin SEL is at a low level, the moving end is connected to the first static end, that is, the first audio source input module is selected as the input audio source, and the first audio signal is used as the target audio signal. When the level of the selection pin SEL is at a high level, the moving end is connected to the second static end, that is, the second audio source input module is selected as the input audio source, and the second audio signal is used as the target audio signal. However, when the level of the mute pin MUTE is at a high level, the audio source selection module 1 will turn off the output of the audio signal. Regardless of whether the level of the selection pin SEL is at a high level or a low level, the audio source selection module 1 will no longer output the audio signal, that is, mute is achieved.

[0039] In some embodiments, the audio source selection module 1 is further used to control the level of the mute pin MUTE according to the level states of the selection pin SEL and the output pin. The level state may include a stable state and a sudden change state. When the level of a pin is stable at a high level or a low level, the level state of the pin can be determined to be a stable state. When the level of a pin switches from a high level to a low level, or from a low level to a high level, the audio source selection module detects that the level of the pin has suddenly changed, and at this time, the level state of the pin can be determined to be a sudden change state. Specifically, taking the first switching switch 11 as an example, when the level state of the selection pin SEL is in a stable state, it indicates that the audio source selection module 1 is stably outputting an audio signal provided by a certain audio source input module. When it is detected that the level state of the selection pin SEL is in a sudden change state, the audio source needs to be switched, that is, the port L_SPKR needs to be disconnected from a certain static end. For example, when the selection pin SEL suddenly changes from a low level to a high level, the audio source selection module 1 detects that the level state of the selection pin SEL is in a sudden change state, and the port L_SPKR needs to be disconnected from the port IN_L1 and connected to the port IN_L2 to switch the audio source. At the moment when the connection with the port IN_L2 is completed, a transient impact is generated on the coupling capacitor of the audio input end of the device, and is transmitted to the first external speaker 4 to form a burst sound. When port L_SPKR is disconnected from port I N_L1 but not yet connected to port I N_L2, no audio signal is transmitted to the first external speaker 4, and no sound is emitted. At this time, the level of the first output pin is not high. Therefore, when the level of the selection pin SEL changes suddenly and the level of the first output pin is not high, the level of the mute pin MUTE is pulled high to turn off the audio signal output. When port L_SPKR is connected to port I N_L2, the transient impact is transmitted to the audio source selection module 1, but at this time the audio source selection module 1 has turned off the output, so the transient impact will not be output to the first external speaker 4, and no explosive sound will be emitted. When it is detected that the level state of the selection pin SEL is stable and the level of the first output pin is restored to a high level, the level of the mute pin MUTE is controlled to be a low level, and the first external speaker 4 receives the second audio signal. For the second switch 12 , the principle of controlling the level of the mute pin MUTE according to the level states of the selection pin SEL and the output pin is consistent with the implementation principle of the first switch 11 , which will not be elaborated here.

[0040] In some embodiments, an oscilloscope can also be used to connect the selection pin SEL and the output pin to obtain the timing diagram of the above pins. The operator confirms the level switching timing of the selection pin SEL and the timing of the explosion sound according to the timing diagram, and determines a suitable time to pull up the mute pin MUTE according to the specific situation of the timing. When the explosion sound passes, the level of the mute pin MUTE is immediately set to a low level.

[0041] It is understandable that the above control process can be implemented by a controller 7, which is connected to the selection pin SEL and the mute pin MUTE. The controller 7 can be integrated into an external control hardware, such as a Bluetooth chip.

[0042] In some embodiments, the audio source selection module 1 has a soft start control pin C_EXT, the first end of the filter capacitor C3 is connected to the power pin VDD of the audio source selection module 1, and the second end of the filter capacitor C3 is grounded. The switching speed adjustment module 6 includes an adjustable capacitor, the first end of the adjustable capacitor is connected to the soft start control pin C_EXT, the second end of the adjustable capacitor is grounded and connected to the second end of the filter capacitor C3, and is used to adjust the soft start time of the audio source selection module. By changing the size of the adjustable capacitor, the soft start time of the audio source selection module 1 can be changed. The larger the capacitance value of the adjustable capacitor, the longer the soft start time of the audio source selection module 1, which slows down the speed of the audio source selection module switching the audio source. The coupling capacitor has enough time to absorb and buffer the DC level jump, so that when the coupling capacitor realizes the audio source switching, the voltage difference between the two ends is small, and no impact is generated, thereby eliminating the blasting sound.

[0043] In some embodiments, the capacitance range of the adjustable capacitor matches the specification of the audio source selection module, wherein the audio source selection module 1 may be a series chip of model DIO32276, the audio source selection module 1 also has two ground pins, both ground pins are grounded, the audio switch circuit also has a resistor R4, the resistor R4 is connected to the mute pin MUTE, and the capacitance range of the adjustable capacitor matching the audio source selection module 1 is 0 to 0.1uF. It should be noted that in design, the maximum achievable capacitance value of the adjustable capacitor should be avoided to be too large, because if the capacitance value connected to the soft start control pin C_EXT is too high, the soft start time of the audio source selection module 1 will be extended, thereby affecting the user experience. In this embodiment, the proposed capacitance value adjustment range has been verified and can be widely adapted to current application scenarios, ensuring the optimization of performance and the improvement of user experience.

[0044] The utility model also provides an audio device, please refer to Figure 3 , Figure 3The circuit diagram of an audio device provided by the utility model includes the above-mentioned audio switch circuit and at least one speaker, and the at least one speaker is connected to the output end of the audio switch circuit. In some embodiments, the output end of the audio switch circuit is the output pin of the audio source selection module 1. It can be understood that the audio device provided by the utility model can be a Bluetooth speaker or a Bluetooth headset, and the utility model does not limit this.

[0045] In some embodiments, the audio device provided by the utility model also includes a low-voltage difference linear regulator U1, which is connected to the audio source selection module 1 of the audio switch circuit. The low-voltage difference linear regulator U1 can convert the power supply voltage provided by the battery into 3.3V and output it. Specifically, the low-voltage difference linear regulator U1 has an input pin IN, an output pin OUT, an enable pin EN, and two ground pins GND, wherein the input pin IN is connected to the power supply VBAT and the capacitor C1, and the other end of the capacitor C1 is grounded, the enable pin EN is respectively connected to the resistor R1 and the resistor R2, and the other end of the resistor R2 is grounded, the output pin OUT is connected to the capacitor C2, and the other end of the capacitor C2 is grounded, the output pin OUT is also connected to the power pin VDD of the audio source selection module 1, and the two ground pins GND are both grounded.

[0046] In some embodiments, the audio device further includes a filter circuit, the filter circuit includes a filter resistor R3 and a filter capacitor C3, a first end of the filter circuit is connected to the low voltage difference linear regulator, and a second end of the filter circuit is connected to the audio switch circuit. Specifically, the output pin OUT is connected to the power pin VDD of the audio source selection module 1 through the filter circuit, and the filter circuit can filter out interference and input the 3.3V power output by the low voltage difference linear regulator U1 to the audio source selection module 1 to power the audio source selection module 1.

[0047] In some embodiments, the audio device further includes a first electrostatic protector and a second electrostatic protector, wherein the first electrostatic protector is connected to the low voltage drop linear regulator U1, and the second electrostatic protector is connected to the speaker. Figure 3 In the embodiment, the electrostatic protector E1 is the first electrostatic protector, and the electrostatic protectors E2 and E3 are the second electrostatic protectors, wherein the first end of the electrostatic protector E1 is connected to the input pin IN, the second end of the electrostatic protector E1 is grounded, the first end of the electrostatic protector E2 is respectively connected to the first inductor L1 and the first external speaker 4, the second end of the electrostatic protector E2 is grounded, the first end of the electrostatic protector E3 is respectively connected to the second inductor L2 and the second external speaker 5, and the second end of the electrostatic protector E3 is grounded. Connecting an electrostatic protector to a circuit can protect the components in the circuit from being damaged by static electricity, thereby extending the service life of the circuit.

[0048] In some embodiments, the audio device also includes a controller 7, which is connected to the low-voltage dropout linear regulator U1. The controller is used to shut down the low-voltage dropout linear regulator U1. Specifically, when the audio switching circuit is not needed to work, the controller can issue a control instruction to control the enable pin EN of the low-voltage dropout linear regulator U1 to a low level, thereby shutting down the output of the low-voltage dropout linear regulator U1, thereby reducing the shutdown power consumption of the audio device.

[0049] Next, the specific application scenarios of the audio device will be introduced in combination with the following embodiments. Figure 3 In this embodiment, the audio device is a Bluetooth headset with an auxiliary input interface (AUX interface), the first external speaker 4 is a left ear canal output speaker, the second external speaker 5 is a right ear canal output speaker, the first audio source input module 2 is a Bluetooth chip, the second audio source input module 3 is an auxiliary input interface, the audio source selection module 1 is a DIO32276 chip, and the switching speed adjustment module 6 is an adjustable capacitor.

[0050] The Bluetooth headset is turned on, and the battery inside the device provides power through the input pin IN of the low-voltage difference linear regulator U1, and the enable pin EN is controlled to be high, so that the low-voltage difference linear regulator U1 can output 3.3V power to the audio source selection module 1. When the controller 7 controls the level of the selection pin SEL to switch, the audio source selection module 1 controls the first switching switch 11 and the second switching switch 12 to switch the audio source, and at the same time detects the level status of the selection pin SEL, the first output pin and the second output pin, and confirms whether to pull the level of the mute pin MUTE up to avoid the blasting sound. The specific principle has been explained in detail in the above description and will not be repeated here. When the level of the mute pin MUTE is controlled to be pulled up, the left channel output speaker and the right channel output speaker are muted. When the level of the mute pin MUTE is controlled to be pulled down, the left channel output speaker and the right channel output speaker are muted and the audio signal provided by the audio source input module is normally received.

[0051] At the same time, the Bluetooth headset is provided with an adjustment unit, which can be a button or a roller, and can adjust the capacitance value of the adjustable capacitor. The user can adjust and test according to the actual hearing experience. The larger the capacitance value of the adjustable capacitor, the longer the soft start time of the audio source selection module 1, thereby increasing the time for the coupling capacitor to absorb and buffer the DC level jump, thereby eliminating the explosive sound.

[0052] This article uses specific examples to illustrate the principles and implementation methods of the utility model. The above examples are only used to help understand the core idea of ​​the utility model. The above is only a preferred implementation method of the utility model. It should be pointed out that due to the limitations of textual expression, there are objectively infinite specific structures. For ordinary technicians in this technical field, without departing from the principle of the utility model, several improvements, modifications or changes can be made, and the above technical features can be combined in an appropriate manner. These improvements, modifications, changes or combinations, or the direct application of the concept and technical solution of the utility model to other occasions without improvement, should be regarded as the protection scope of the utility model.

Claims

1. An audio switch circuit, characterized in that: The audio switch circuit comprises: A first audio source input module, wherein the first audio source input module is used to provide a first audio signal; A second audio source input module, wherein the second audio source input module is used to provide a second audio signal; an audio source selection module, the audio source selection module being used to select the first audio signal and the second audio signal to obtain a target audio signal; A switching speed adjustment module, the switching speed adjustment module is connected to the audio source selection module, and the switching speed adjustment module is used to adjust the speed at which the audio source selection module switches the audio source.

2. The audio switch circuit according to claim 1, characterized in that: The audio source selection module includes at least one switching switch, and the switching switch has a moving end, a first static end, and a second static end. The moving end is used to connect to an external speaker, the first static end is used to connect to the first audio source input module, and the second static end is used to connect to the second audio source input module; the moving end is configured to be connected to the first static end, connected to the second static end, or disconnected.

3. The audio switch circuit according to claim 2, characterized in that: The audio source selection module has a mute pin, a selection pin and an output pin, the mute pin is used to turn off the output of the target audio signal, the selection pin is used to connect the moving end with the first static end, the selection pin is also used to connect the moving end with the second static end, and the output pin is used to connect the moving end and the external speaker to output the target audio signal; the audio source selection module is also used to control the level of the mute pin according to the level status of the selection pin and the output pin.

4. The audio switch circuit according to claim 1, characterized in that: The audio source selection module has a soft start control pin, and the switching speed adjustment module includes an adjustable capacitor, one end of the adjustable capacitor is connected to the soft start control pin, and the other end of the adjustable capacitor is grounded, which is used to adjust the soft start time of the audio source selection module.

5. The audio switch circuit according to claim 4, characterized in that: The capacitance range of the adjustable capacitor matches the specification of the audio source selection module.

6. An audio device, characterized in that: The audio device comprises the audio switch circuit according to any one of claims 1 to 5 and at least one speaker, wherein the at least one speaker is connected to an output end of the audio switch circuit.

7. The audio device according to claim 6, characterized in that The audio device further comprises a low voltage dropout linear regulator, and the low voltage dropout linear regulator is connected to the audio source selection module of the audio switch circuit.

8. The audio device according to claim 7, characterized in that The audio device further includes a first electrostatic protector and a second electrostatic protector, wherein the first electrostatic protector is connected to the low voltage drop linear regulator, and the second electrostatic protector is connected to the speaker.

9. The audio device according to claim 7, characterized in that The audio device further includes a filter circuit, a first end of the filter circuit is connected to the low voltage drop linear regulator, and a second end of the filter circuit is connected to the audio switch circuit.

10. The audio device according to claim 9, characterized in that The audio device further includes a controller connected to the low voltage dropout linear regulator, and the controller is used to shut down the low voltage dropout linear regulator.

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